KR0129583Y1 - Sealless Double Displacement Modular Dispenser - Google Patents

Abstract

The modular dispensing system for dispensing a fluid in the correct amount comprises: a housing defining a reservoir for the fluid and having a distal end and a proximal end; A closed surface of the proximal end of the housing forming an outlet for dispensing fluid from the reservoir and a chamber between the reservoir and the closed surface for receiving fluid from and dispensing fluid through the closed surface Wow; An operation in which the stem member is sealed and slidably received in the chamber having a non-operational position withdrawn from the chamber and in the reservoir, and when in the non-operational position, the stem member has a proximal end proximate to the chamber and a distal end spaced from the chamber. A stem member movable between positions; Closing means vertically deflected to a closed position engaged with the closure surface; An end member integral with the distal end of the housing; A self-contained bi-displacement dispensing unit comprising a deformable diaphragm sealing means longitudinally in the housing for sealingly isolating fluid in the reservoir; A self-contained actuator unit comprising a cylindrical body having a cavity at one end and actuating means for moving the stem member between actuated and non actuated positions; And two sets of interlockable locking means on the dispensing unit and the actuator unit for releasably and securely attaching the dispensing unit to the actuator unit.

Description

Sealless Displacement Modular Splitter

1 is a front sectional view of a modular dispensing device according to the present invention.

FIG. 2 is a front cross-sectional view similar to FIG. 1 partially disassembled and partially cut.

3 is an exploded view of the dispensing and nozzle unit constituting part of the dispensing device shown in FIG.

4 to 7 show the dispensing unit in the assembled state of FIG. 3, and a front sectional view showing the different operating states of the dispensing unit.

FIG. 8 is an exploded view of the actuator and the adjustment unit constituting part of the dispensing device shown in FIG.

9 and 10 show the actuator and the adjustment unit in the assembled state of Fig. 8, respectively showing the two operating positions of the adjustment unit.

FIG. 11 is a cross sectional view of the component shown in FIGS.

12 is a detailed cross sectional view taken along line 12-12 of FIG.

13 to 18 are detailed front sectional views showing the structure of another diaphragm that can be used in the present invention.

* Explanation of symbols for main parts of the drawings

20: dispensing device 22: dispensing unit

24: nozzle unit 26: actuator unit

28: adjustment unit 30: housing

36: storage 47: spring

50: diaphragm 56: stud

66: driving piston 82: cylinder

116: 0-ring seal 224: set screw

The present invention relates to a fluid dispensing mechanism, in particular an improved modular positive displacement distribution system with simplified structure.

In the device of the present invention, the bonsai module supplies a precisely controlled amount of fluid to the receiving surface without the need for a seal, in particular a sliding seal, or a spring in operation.

Sealants and adhesives, especially when they are highly viscous, are difficult to dispense with precise control. Insufficient amounts affect seal properties, while excess amounts are uneconomical and flow outwards. This fluid distribution must also be done quickly, without losing accuracy.

Background Art Many apparatuses for controlling and dispensing fluids such as adhesives, sealants and the like at precise flow rates and precise amounts, and for accurately seating on receiving surfaces have been proposed in the past.

The invention is named Liquid Dispensing Apparatus, and US Patent No. 4,347,806, issued to Argazzi et al. On September 7, 1982sus, in which fluid is sucked into the chamber and the piston delivers the fluid to a dispensing outlet or A double displacement valve is described that pushes through a nozzle. For example, in other known examples of the prior art, seals are a necessary element of the device and they have not been holistic and effective in meeting the intended purpose.

Fluid loss due to fluid entering other cavities through nozzles other than the outlet nozzle is a major problem. When the fluid is a sealant or adhesive, it accumulates and hardens, which adversely affects the operation of the dispensing device and may render the device inoperable.

It is an object of the present invention to provide a modular bi-displacement device for dispensing fluid in the correct amount, which device comprises a dispensing unit without a seal and an actuator unit. Preferably, it is desirable to provide a closing device in the form of a ball operated by a dispensing fluid in the dispensing unit. It is also preferable to install a deformable diaphragm between the storage unit and the device, thereby preventing undesired intrusion of the dispense.

Another object of the present invention is to provide a modular device capable of combining a self-contained actuator unit and a self-contained dispensing unit by a quick separation structure without loss of fluid, and manufacturing the actuator unit and the dispensing unit in various dimensions to each other. Different sized actuator units and dispensing units are interchangeable. It also allows one of the dispense nozzles of various sizes to be attached to any dispense unit.

According to the present invention, the features of the modular system for dispensing fluid in the correct amounts are as follows.

A dispensing unit comprising a closing means movable between an open position and a closed position for dispensing the fluid in a constant amount, and an actuator unit operating the dispensing unit for dispensing a quantity of fluid through the closing means. And locking means mutually engageable on the dispensing unit and the actuator unit for detachably attaching a selected one of the dispensing units to the actuator unit.

Next, the present invention will be described with reference to the accompanying drawings.

1 to 3 show a modular bi-displacement dispensing device 20, which is an embodiment of the present invention. This dispensing apparatus 20 is comprised from the dispensing unit 20, the nozzle unit 24 (refer FIG. 3), the actuator unit 26, and the adjustment unit 28. As shown in FIG. Next, each of these units and their mutual relationship will be described.

The dispensing unit 22 comprises a cylindrical housing 30 (see FIG. 1) with an end member 32 of decreasing diameter. The housing 30 is shown in a cylindrical shape, and all other units shown in FIGS. 1 and 2 have a shape adapted to it, but the present invention is not limited to only a cylindrical shape. The insert 34 is receivably fitted in the housing 30. The insert 34 forms a reservoir 36, which stores an inlet 39 provided with a housing 30 and an inlet 38 (see FIG. 3) aligned in the insert. It is adapted to receive the pressurized fluid from a distant source (not shown) via via. In FIG. 1, the lower end of the insert 34 is provided with a cone closure surface 40 and is preferably composed of a suitable material that is compatible with the fluid to be dispensed. Suitable materials are Delrin brand plastic, polyethylene, polypropylene, nylon, polyester, stainless steel, and preferably metals such as 316 stainless iron, ceramics And the most preferred are fluorinated hydrocarbon polymers such as Teflon brand plastic, and these materials are not limited. This insert 34 is fitably housed in a counterbore 42 provided at the bottom of the housing 30 (see FIG. 1). The housing 30 and the insert 34 have a good integral structure, but are detachable for ease of manufacture as shown.

A distal end of the housing 30 opposite the end member 32 is provided with a screw therein to accommodate the cap member 44 (see also FIG. 1). The cap member 44 has an inner hole 45 with a shoulder 46. The compression spring 47 is received in the hole 45 and engages the shoulder 46 at one end. At the other end of the compression spring 47, the compression spring 47 engages with a suitable retainer 48, which retains a gate member in the form of a ball 49, and a closed surface. In combination with 40 maintains the gate member. When the cap member 44 is in close contact with the housing 30, both the shoulder 46, the spring 47, and the retainer 48 are all firmly supported to support the ball 49 seated on the closed surface 40. Cooperate.

The deformable diaphragm 50, which may be composed of a material deformable and compatible with the fluid to be dispensed, extends transverse to the longitudinal axis of the housing. The suitable material may be any of the materials mentioned above for the valve seat except ceramic. The outer circumferential region 52 (see FIG. 3) is surrounded between the insert 34 and the shoulder 53 (see FIG. 1) when the cap member 44 is completely in contact with the housing. As shown in detail in FIG. 3, the diaphragm 50 has a central opening 54, which opening 54 extends from the distal end of the long stem member 60. ) Freely accept

The extension 62 of the stem member 60 is screwed into the stud 56, and when in close contact with the diaphragm 50, the stem member 60 and the diaphragm 50 are operated in an integrated manner. Extension 62 has a longitudinal plane 222 (FIGS. 1 and 2), which acts as a key passage and when engaged by set screw 224 threaded into housing 30 Prevent negative rotation. The distal end of the stem member 60 has a longitudinally extending and threaded hole therein for receiving the fixing unit 64.

The stationary unit 64 is slidably received through the radially extending hole in the supply piston 66, which piston 66 has a ball shape with two opposed spherical portions removed. This piston 66 may be composed of a suitable material compatible with the fluid to be dispensed. The suitable material can be any material from which the insert 34 can be constructed. When the stationary unit 64 is in close contact with the distal end of the stem member 60, the supply piston is integral, so that the stem member 60 and the diaphragm 50 associated therewith are integrally operated.

The piston 66 is fitted in a state in which the piston 66 is slightly spaced from or slightly in contact with the wall of the chamber 67. As the piston 66 moves, it is possible to use a zero ring to make a uniform wiping action against the wall of the chamber. Due to the cooperative relationship between the supply piston 66 and the wall of the chamber 67, no check valve is required between the supply source and the reservoir 36.

The present invention does not limit the closure in the form of the conical closure surface 40 and the ball 49, but may be any suitable shape capable of properly closing the opening between the storage unit 36 and the nozzle unit 24. . The conical closure surface 40 and ball 49 shape are good because they make line contact, not face contact, between the opposing elements. However, other similar shapes with spheroidal shapes can be used effectively and can benefit from the present invention.

1 and 4-7, the insert 34 is formed with a chamber 67 between the storage unit 36 and the closed surface 40. This chamber 67 is smaller in size than the reservoir 36. In addition, in the structure shown, the chamber is axially aligned with the storage unit 36 such that it is at the conical cam surface 67A at the contact surface between the storage unit 36 and the chamber 67. The feed piston 66 is movable over the stem member 60 between an inoperative position in the storage unit 36 withdrawn from the chamber 67 and an operating position that is sealed and slidably received in the chamber 67. .

As shown in FIG. 4, when the stem member 60 moves downward, the stem member contacts the point at which the outer circumferential surface of the supply piston 66 engages the wall of the chamber 67 shown. This initial coupling is shown in FIG. Since the fluid in the storage unit 36 is pressurized, the fluid to be dispensed will fill the chamber 67 completely. With the continuous downward movement of the stem member 60, the feed piston 66 moves with the stem member, the outer circumferential surface of which will be first coupled to the wall of the chamber 67, as shown in FIG. 5. With continuous downward movement of the stem member 60, the feed piston 66 is moved to an operating position in the chamber 67 that represents the furthest movement of this particular stroke. This location is shown in FIG. When the feed piston is moved from the position in FIG. 5 to the position in FIG. 6, the fluid pushes the ball 49 away from the closing surface 40. When the fluid piston 66 is displaced from the position in FIG. 5 to the position in FIG. 6, the amount of fluid is referred to as a defined charge of the fluid. When the feed piston reaches the end of its downward stroke, the ball 49 returns to engage the closing surface 40 under the pressure of the spring 47, and the piston also acts as a spring 112 (described below). 1 degree) back to the position shown in FIG.

A feature of the present invention lies in the structure of the stem member 60 and the supply piston 66 and the relationship between them and the chamber 67. In particular, the structure of the present invention allows the dispensing device 20 to operate satisfactorily fully and compensate for incorrect alignment of the various parts. Therefore, the stem member 60 is designed to be flexible in the transverse direction of its longitudinal axis. In the absence of a component as shown in FIG. 7, in the shape and structure of the outer surface of the feed piston 66, the outer circumferential surface of the feed piston 66 moves the piston along it until it reaches the position of FIG. 5. It is an instrument that engages the cam surface 67A which acts to guide and is fully centered to advance to the position of FIG. Thus, the cam surface 67A and the outer surface of the feed piston 66 are in sliding sealing engagement with the inner wall of the chamber 67 even when the longitudinal axis of the stem member is misaligned with the longitudinal axis of the insert 34. Mutually effective to guide the piston.

Referring to FIG. 3, the nozzle unit 24 has a mounting end 68 extending through a longitudinal hole 70 formed in the cap member 44. The annular groove 72 formed slightly away from the innermost end of the nozzle unit 24 is adapted to receive a zero ring seal 74 which ensures the passage of fluid through the hollow needle member 76 in the manner described. Works. The cap member 44 is adapted to receive and engage a bayonet type extension 80 which is integral with the nozzle unit 24 and extends oppositely. Because of this structure, the dispensing unit 22 can accommodate nozzle units 24 of various sizes at one time. The nozzle unit can be removed by twisting slightly around the longitudinal axis to pull out of the hole 70. The second nozzle unit 24 can be attached by reversing the operation as described above.

As shown in FIGS. 1 and 2, and more particularly in FIGS. 8 to 10, the actuator unit 26 is an elongated cylinder having a central hole 84 formed in an intermediate region and extending longitudinally. And a counter bore 86 at the distal end and an adjacent counter bore 88. The two counter bores 86 and 88 communicate with each other and are axially aligned with respect to the central hole 84. The actuator shaft 90 is slidably received in the central hole 84 and is integral with the drive piston 92 disposed in the counter bore 86. The drive piston 92 and its actuator shaft 90 are reciprocable along an operating shaft that is the longitudinal axis of the cylinder 82. The drive piston 92 is used in fluidic operation, preferably pneumatic operation, but other fluids, including liquids, may also be used. In fact, the actuator unit 26 may be of a completely different kind, for example an electrically operated solenoid or a mechanical cam. In addition, the operation of the actuator unit 26 may be controlled by an appropriate computer (not shown). However, in the case of the actuator unit 26, the 0-rings 94, 96 surround the actuator shaft 90 in a position spaced in the opposite direction from the drive piston 92. The drive piston 92 itself has a suitable zero ring seal 98.

As shown in FIG. 1, to move the drive piston 92 downward, pressurized working fluid enters the port 100 and into the counterbore 86 over the piston via the conduit 102. It causes the fluid to flow. The working fluid in the counter bore 86 below the drive piston 92 is discharged via the end member 32 in communication with the conduit 104 in the port 106. The actuator shaft 90 is prevented from being rotated by the set screw 108, which is screwed into the cylinder 82, and is adjacent to the longitudinal plane 110 (FIG. 8) formed in the shaft acting as a keyway. Are arranged quickly in them with the shortest positioned. Compression spring 112 is received in counterbore 88 and one end rests on its support surface 114. In the manner described below, the compression spring 112 acts to retain the drive piston 92 in the retracted position shown in FIG. 1 when it is in the inoperative position. That is, air or other working fluid is used to move the drive piston 92 to the non-operating position, but the spring 112 is added to actuate when the working fluid is lost.

In the method described below, the drive piston 92 acts to actuate the valve mechanism as shown in more detail by the ball 49 acting in conjunction with the closing surface 40. With continued reference to FIG. 1, the end member 32 of the dispensing unit 22 is slidably received in the counter bore 86 at the end of the actuator unit 26. The o-ring seal 116 suitably surrounds the short end member 32 of its adjacent end to ensure a sealing relationship between the cylinder 82 and the end member 32. When the spaced distal rim of the cylinder 82 is firmly engaged with the shoulder 120 of the housing 30, the annular groove 122 formed in the outer surface of the end member 32 is a cylinder 82. And a plurality of set screws 124 which are screwed into and radially extend therethrough and are spaced apart. By the structure described above, the dispensing unit 22 can be removed or selectively attached from the actuator unit 26, and when each unit is joined, they are set screw 124 coupled with the annular groove 122. Can be prevented from coming into close contact with each other.

The extreme end of extension 62 is a male T-shaped connector 126 (FIG. 3) engageable with a similarly formed female slot 128 (FIG. 8) in the distal end of actuator shaft 90. ) Is formed. When the dispensing unit 22 is inserted into the actuator unit 26, the dispensing unit is aligned such that the T-shaped connector 126 is properly received by the slot 128. As a result, the dispensing unit 22 is rotated 90 degrees so that the T-shaped connector 126 is properly installed to prevent the stem member 60 from retracting from the actuator shaft 90. When this occurs, the stem member and the axis are operable like the unit as they move along the longitudinal axis of the dispensing device 20. Typically, the set screw 124 will not be adjusted to engage the annular groove 122 until the T-shaped connector 126 fully engages the slot 128.

With reference to FIGS. 8 to 11, the adjustment unit 28 is shown. The adjustment unit 28 acts to selectively adjust the operation of the drive piston 92 such that the fluid piston 66 is moved from the non-actuated or retracted position to the plurality of actuation positions. In any operating position, the supply piston 66 is sealed and slidably received in the chamber 67. This concept will be described in detail in the following description. As best shown in FIGS. 8-10, the threaded shank 130 extends and is integral from an adjacent end of the actuator shaft 90, ie, the spacing end of the drive piston 92. The tubular stud 132 screwed therein is screwed into the threaded shank 130. This stud 132 is also threaded externally and the external thread is rougher than the internal thread. The stroke adjusting nut 134 is screwed onto the stud 132 and is keyed to the cylinder 82 to rotate about the working or longitudinal axis of the dispensing device 20.

Next, the structure of this key will be described below.

As shown in detail in FIG. 8, the stroke adjusting nut 134 is formed with four holes 136 parallel to the longitudinal axis of the cylinder 82 and equally spaced on the outer circumference of the stroke adjusting nut 134. . The cylinder 82 is formed with a threaded hole 138 adapted to receive the threaded stud 140. The axis of the hole 138 is at the same radial distance from the longitudinal axis of the cylinder 82 as with each hole 136. In any case, the stroke adjusting nut 134 is properly positioned over the stud 132. One of the holes 136 is then aligned with the threaded hole 138, and the stud 140 is received through the hole 136 and screwed into the hole 138. In the method, the stroke adjusting nut 134 is supported against rotation with respect to the cylinder 82 even though it is free of axial movement with respect to the cylinder 82.

The stroke adjustment nut 134 formed with the radially opposed hole 142 together with the ball 146 and the compression spring 144 with a diameter slightly smaller than the hole 142 is detented in the method to be described briefly. Acts as). Crown member 148 is screwed together with stud 132, with spring 144 and ball 146 supported in radial hole 142. This stud extends to the bottom of the threaded hole 150 of the crown member 148. Set screw 152 (FIG. 9) is threaded into the radially opposed hole 154 in the crown member and advances until engagement of stud 132. When the set screw 152 is coupled to the stud 132, the crown member 148 and the stud 132 operate as a unit.

An annular skirt 56 overlapping the outer surface of the cylinder 82 is integrally formed with the crown member 48. As shown in detail in FIGS. 11 to 12, the inner circumferential surface of the scud portion 156 is formed with a plurality of parallel grooves 158 extending in parallel in the longitudinal direction, each groove having a ball 146. ) Have the same radius. In fact, the ball 146 is coupled to one groove 158 at the same time. Because the spring 144 is elastic, the crown member 148 can be rotated about a longitudinal axis that causes it to lie on the ridge 60 of the neighboring intermediate groove 158 until the ball 146 lies in the next groove. . There is a fixed relationship between the movement of the stroke adjusting nut 134 along the actuation axis and the rotation of the crown member about the actuation axis. The dispensing device 20 is such that, for example, the stroke adjusting nut 134 retracts or advances from the end surface 162 of the cylinder 82 at a rate of one thousandth inch per click, ie one groove 158. ) Is designed so that the ball 146 from) to the groove adjacent to it is moved.

Although the shape and structure of the diaphragm 50 is shown in FIGS. 1 to 7, the present invention is not limited thereto, and various shapes and structures may be used. In each case, however, the outer peripheral region of the diaphragm is fixed, but in the central region the general plane of the diaphragm is movable in the transverse direction.

For example, in FIG. 13, the modified diaphragm 50A is shown to have a rigid outer circumferential region 16A between suitable retention members 166 and 168. In FIG. The stem member 60 fixed to the central region 170 of the diaphragm 50A is free to move in the longitudinal direction, but this depends on the degree of elasticity present in the diaphragm transverse to the plane of the diaphragm. The extreme position of diaphragm 50A, shown in dashed lines, is shown in FIG.

Larger lateral movement can be achieved with the structure shown in FIGS. 15 and 16. In FIG. 15, the other diaphragm 50B, which has been reduced, has an outer circumferential region 172, which is fixedly supported by the retaining members 174, 176, and its central region 178 is connected to the stem member 60. In FIG. It is fixed. In the relaxed state, the diaphragm 50B shown in FIG. 15 is formed by the first folding member 180 adjacent to the central region 17B and the second folding member 182 adjacent to the outer circumferential region 172. Include. The folding members 180 and 182 are interposed at an annular vertex 184 at the hinge. As shown in FIG. 15, the annular apex 184 lies outside the plane of the outer circumferential region 172 and the central region 178 when the diaphragm 50B occupies its solid line position (FIG. 15). have. When the stem member 60 is moved along its longitudinal axis, the diaphragm can take one of the two extreme positions shown by dashed lines in FIG. 15. Normally obtainable displacement of diaphragm 50B is substantially larger than displacement of diaphragm 50 or 50A.

The modification of the structure of the diaphragm 50B is shown in FIG. 16, and the other modification is shown in the diaphragm 50C. In this embodiment, the diaphragm has an outer circumferential region 186 fixed between a central region 192 fixed to the stem member 60 and a suitable retaining member 188, 190. In this embodiment, the plurality of concentric folding members 194, 196 cooperate with the plurality of folding members 198, 200. Each neighboring pair of folding members defines annular vertices 202, 204, and 206 that are each hinged. Depending on the operation of the stem member 60, the diaphragm 50C can move to the extreme position indicated by the dashed line shown in FIG. 6, and all of the folding members are generally moveable towards the cavity plane.

Another structure is shown in FIG. 17 where the cylindrical outer retaining member 208 may be an insert in the housing formed with the annular inner slot 210 or the housing itself. Slot 210 may receive and support the outer circumferential region 212 of another modified diaphragm 50D in which stem member 60 is secured to central region 214.

18 shows another structure in which the outer retainer 216 and the modified diaphragm 50E are integrated. The parts may for example be made of an injection molded plastic material. In this structure, the outer circumferential region of the diaphragm 50E is integrated with the retainer 216 but has a central region 218 fixed to the stem member 60. As with the structure described above, the stem member is movable along its longitudinal axis depending on the degree of elasticity present in the diaphragm.

The following describes the operation of the modular dispensing device 20. The specific fluid discharged is, for example, a sealant or adhesive material in the form of a slurry, which has a viscosity of 1 to 1,000,000 centipoise or more centipoise and passes through the port 39 under pressure. To fill the reservoir 36 and the chamber 67. At an appropriate time, the actuator unit 26 is activated to dispense fluid from the dispensing unit 22. Referring to FIG. 1, this is accomplished by introducing a pressurized fluid such as air, for example, to the upper side of the drive piston 92 via the port 100. This causes the actuator shaft 90 to move downward with the stem member 60. This causes the diaphragm 50 to move from the position shown in FIG. 4 to the position shown in FIG. 5, while at the same time slidingly coupling the supply piston 66 to the wall of the chamber 67. Is moved so as to isolate the chamber from the reservoir 36 and the ball 49 remains on the closing surface 40, as shown in FIG.

Movement of the piston 92 and the actuator shaft 90 is opposed to the pressing of the spring 11. In addition, the stroke of the piston 92 is determined by the distance between the stroke adjusting nut 134 and the end surface 162. FIG. 9 shows the positioning of the stroke adjusting nut 134 relative to the end surface 162 which will only allow relatively small strokes by the piston, and FIG. 10 shows this relative positioning which will allow the relatively long strokes of the piston. . Therefore, in the former example, the fluid-limited filling will be dispensed, while in the latter example, the relatively large-filled filling will be dispensed.

Of course, the stroke of the piston 92 permitted by the stroke adjusting nut 134 determines the magnitude of the movement of the feed piston 66 into the chamber. When the feed piston 66 is moved into the chamber 67 to the position of FIG. 6, the fluid in the chamber presses the ball 49 out of the closing surface 40, thereby releasing a limited change of fluid from the chamber. As the feed piston 66 moves further into the chamber 67, more fluid is dispensed by the dispensing unit 22. The fluid then flows through the retainer 48 and then through the needle member 76 of the nozzle unit 24 over the surface intended to receive the fluid. When limited filling is dispensed from chamber 67, it causes the flow of fluid through port 100 to terminate, and fluid under pressure causes port 106 to return drive piston 92 to its reset position. ), And at the same time the fluid piston 66 returns to the non-operational position as shown in FIG. If no fluid is supplied, the spring 112 acts as a support to return the fluid piston 92 to its reset position.

In the case of misalignment between the stem member 60 and the chamber 67 (FIG. 7), the stem member causes the actuator shaft 90 to be advanced, and the feed piston 66 is conical cam surface ( 67A). As the stem member 60 is elastically designed in the longitudinal direction, the fluid piston 66 together with the guide of the cam surface 67A causes the wall of the chamber 67 to be shown in FIGS. 5 and 6. The seals are rearranged to be sealable and to be slidable.

The dispensing device 20 is modular in that it allows various combinations of actuator unit 26, diaphragm, dispensing unit 22 and nozzle unit 24. The dispenser of the present invention considered a dispenser without a seal because when the dispensing unit 22 is completely lacking in sealing and slipping in the fluid dispensing device and the seal is broken, their operation is not common. In this example, the diaphragm 50 actuator unit 26 is a sole part used to isolate the dispensing unit 22. When axial movement is allowed by the deformability of the diaphragm, it is fixedly supported at its outer circumferential position and internal position to prevent the possibility of fluid passage from the reservoir 36 to the mechanism of the actuator unit. This structure also allows for rapid change of the dispensing unit without loss of fluid. Wear and friction losses and fluid losses can be avoided by this structure.

The dispensing bow 20 has other seals such as, for example, 0-rings 94, 96, 98 and 116 (FIG. 1), which are sealed in the actuator unit 26 irrespective of the fluid to be dispensed. do. O-ring seal 74 (FIG. 3) is integrated with nozzle unit 24 and is not directly related to dispensing unit 22. In any case, its condition can be easily observed and easily moved with the nozzle unit, which can be replaced if it is defective. Moreover, it is not a kinetic or sliding seal, it is in the form of a common seal and is used for replacement if related to the present invention.

Claims (10)

A modular dispensing system for dispensing fluid in an accurate amount, comprising: a housing defining a reservoir for the fluid and having a distal end and a proximal end; A closed surface of the proximal end of the housing forming an outlet for dispensing fluid from the reservoir and a chamber between the reservoir and the closed surface for receiving fluid from and dispensing fluid through the closed surface Wow; An operation in which the stem member is sealed and slidably received in the chamber having a non-operational position withdrawn from the chamber and in the reservoir, and when in the non-operational position, the stem member has a proximal end proximate to the chamber and a distal end spaced from the chamber. A stem member movable between positions; Closing means vertically deflected to a closed position engaged with the closure surface; An end member integral with the distal end of the housing; A self-contained bi-displacement dispensing unit comprising a deformable diaphragm sealing means in the longitudinal direction for sealingly isolating the fluid in the reservoir; A self-contained actuator unit comprising a cylindrical body having a cavity at one end and actuating means for moving the stem member between actuated and non actuated positions; Two sets of interlockable locking means over the dispensing unit and the actuator unit for releasably and securely attaching the dispensing unit to the actuator unit, wherein the first set of interlocking locking means is on the distal end of the stem member. And a male receiving slot reciprocally formed above the actuating means, such that when the end member of the dispensing unit is inserted into the cavity of the actuator unit, the male connector aligned with the female receiving slot is received relative to the slot. The actuator unit rotates 90 ° relative to the dispensing unit, the withdrawal of the female connector from the male slot is prevented, the actuation means locked together and actuated in an integral manner, the second set of interlockable locking means An annular groove formed in the end member and a circle of actuator into the cavity By including one or more set screws threaded through the cylindrical body, when the end member is inserted into the cavity, the one or more set screws engage the annular groove; And the dispensing unit further comprises means for maintaining the sealing means in a sealed state while the dispensing unit is separated from the actuator unit. 2. The actuator unit of claim 1 wherein the actuator unit comprises a cylindrical body 82 having a cavity at one end, the dispensing unit comprising a housing 30, the housing being end member receivable within a cavity of the cylindrical body. 32, the housing comprising: 0-ring seal means 116 for preventing fluid flow between the cylindrical body and the end member; and fastening means for releasably attaching the housing to the body. Modular dispensing system for dispensing fluid in the correct amount, further comprising: 122, 124). 3. A fluid according to claim 2, wherein said fastening means comprises an annular groove 122 formed in said end member and a set screw 124 that is engageable with said annular groove and is screwed to said cylindrical body. Modular dispensing system for dispensing the correct quantities. A housing according to claim 1, comprising a closing surface (40) which forms a fluid reservoir and has an inlet (38) for conveying pressurized fluid to the reservoir and forms an outlet for dispensing fluid from the reservoir. 30, closing means 47, 49 vertically deflected to the closed position associated with the closing surface, a chamber 67 between the closing surface and the reservoir to accommodate a limited fill of fluid; Mounted between the non-operational position mounted in the distal end of the stem member and in the reservoir retracted from the chamber, and between the operating position sealingly and slidably received in the chamber for moving the closing means to the open position by the fluid in the chamber; A long position between the non-operating position and the operating position, and a supply piston 66 which is movable in and thereby dispenses a limited fill of fluid from the chamber. An actuator means 26 comprising an actuating mechanism operative to move the piston by means of a system member 58 and between the housing and stem member fixed to the housing and stem member, to isolate the reservoir from the actuating mechanism. And a sealless seal means (50) extending and deformable to move the piston means between the non-actuated position and the actuated position. 5. The module for dispensing a fluid in the correct amount according to claim 4, characterized in that the closing means comprises a check ball (49) and a spring (47) for urging the check ball to seal seal with the closing surface. Formula distribution system. 6. The housing of claim 4 or 5, wherein the housing has a longitudinal axis with the chamber and the closure surface centrally arranged, the stem member is movable along the longitudinal axis, and the sealless sealing means is fixed to the housing. And a central region fixed to said stem member, said diaphragm extending transverse to said operating axis and being deformable. 7. The chamber (67) according to claim 6, wherein the chamber (67) is formed of a right cylinder, the inner sidewall of the cylinder is coaxial with the longitudinal axis of the housing, and the longitudinal axis of the stem member is aligned with the longitudinal axis. The reservoir 36 is formed of a vertical cylinder having a diameter larger than the diameter of the chamber, and when the stem member 58 is moved between an operating position and a non-operating position, the housing is supplied with a supply piston 66. A module for dispensing fluid in the correct amount, characterized by having a conical cam surface 67A between the reservoir and the chamber for guiding it into a joint which is slidably sealed with the inner wall of the chamber 67. Formula distribution system. 8. The stem member (58) of claim 7, wherein the stem member (58) is displaceable transversely to the longitudinal axis and the feed piston (66) has an outer surface that is slidably engageable with the cam surface (67A). When misaligned with respect to the longitudinal axis of this housing, the cam surface and the outer surface of the feed piston interact to guide the feed piston 66 into an engagement that is slidingly sealed with the inner sidewall of the chamber 67. Modular dispensing system for dispensing fluid in precise quantities. 5. The actuating mechanism according to claim 4, wherein the actuating mechanism comprises a cylinder and a fluid drive piston 92 axially movable in the cylinder between the first and second positions, the closure means being coupled to the closing surface to drive Occupies a closed position when the piston is in the first position, the closing means being separated from the closing surface by the fluid in the chamber and moved to the second position to allow fluid to be dispensed from the reservoir; A modular dispensing system for dispensing fluid in the correct amount, characterized in that the drive piston occupies an open position. 2. The housing (30) according to claim 1, wherein the housing (30) forms a reservoir (36) for holding the fluid under pressure and a dispensing chamber (67), wherein the closing means (47, 49) on the housing are fluid from the reservoir. Moveable along the operating axis between the open and closed positions for dispensing the feed, a feed piston 66 is mounted at the distal end of the elongated stem member 58 and retracts storage 36 from the chamber 7. Movable to an open position between an inoperative position in the chamber and an operating position sealable and slidably received in the chamber 67 to move the closure means by the fluid in the chamber, thereby confining Dispensing charge, the actuator means 26 comprises an actuating mechanism actuated to move the feed piston 66 by the elongate stem member 58 between the actuated and non actuated positions, The actuator means 26 comprises a drive piston operable with fluid movable along the operating axis between a first position where the feed piston 66 is in an inoperative position and a second position where the fluid piston is in an operating position ( 92, an actuator body for urging said drive piston towards said first position, and an actuator body for supporting said drive piston for reciprocating motion along said actuating axis with a distal surface and a support surface distant therefrom; 82, a threaded shank 130 integrally formed with the drive piston, and an adjusting means 28 for selectively adjusting the operation of the actuating means, the adjusting means being screwed therein. Is formed, coupled with the shank and screw and threaded to the outside, the external threading is more coarse than tubular studs 132 and studs than internal threading. A key is coupled to the body to be threaded over and to prevent rotation of the nut about the actuating shaft, whereby the rotation of the stud causes a stroke adjustment nut 134 to move the nut along the axis and stroke adjustment with the support surface. Elastic means extending between nuts and means for rotating the stud to move the stroke adjusting nut between the adjacent position and the distal position, the stroke adjusting nut moving a drive piston towards the second position. And the stroke adjustment nut are non-rotatable about the shank and the actuating axis, whereby the fluid piston is at least limited filling of fluid from the chamber as the fluid piston moves towards the first position. Adjacent positions up to the distal surface moved to an operating position for dispensing That the feed piston is moved from the chamber to another operating position for dispensing a maximum defined fill of fluid in accordance with the movement of the drive piston towards the first position and is movable along the operating axis between the spaced apart positions away from the distal surface. Modular dispensing system for dispensing fluids in precise quantities.