US2969894A - Coating machine - Google Patents

Description

Jan. 31, 1961 F. A. REUSTLE COATING MACHINE Filed May 16, 1958 4 Sheets-Sheet 1 INVENTOR 3 7 4/ ATTORNEY F. A. REUSTLE COATING MACHINE Jan. 31, 1961 R w Q D \m 55 m 9 h mm m w w s ml? W9 mK mQ z hm\ H R. fi a a & E H m 4 h Wm n w Mm &\ uh a m F \N 5N N IMF. 3-1m}! "wm N m x .W /.M \h Mb Nb M II M U \.W U mm Q U Nu t Q w H mm. m M d u i F ATTORNEY F. A. REUSTLE COATING MACHINE Jan. 31, 1961 4 Sheets-Sheet 3 Filed May 16, 1958 ATTORNEY Jan. 31, 1961 F. A. REUSTLE COATING MACHINE Filed May 16, 1958 4 Sheets-Sheet 4 INVENTOR FJY .Reu s fi ATTORNEY Unite This invention relates to a machine of simple construction for applying a uniform coating to a surface, and is especially adapted for use in applying an even coating of liquid asphalt to a roof.

More particularly, it is an aim of the present invention to provide a machine having means for heating a tank containing the coating material whereby the material is converted from a solid to a liquid form so that it can be evenly applied to a surface over which the machine is moving.

Another object of the invention is to provide a machine having pressure feed means for uniformly applying the coating including a conduit system and pump which are disposed relative to the machine so as to be kept sufliciently heated at all times, while the machine is in operation, to prevent the coating material from solidifying in the conduit system.

Still another object of the invention is to provide an apparatus including novel means enabling the conduit system to be cleansed so that the coating material will not congeal therein and prevent improper operation of the apparatus.

Another object of the invention is to provide a machine having a single control unit manually operable for opening a valve of a discharge head through which the coating material is dispensed and for engaging a drive means for operating the pump of the conduit system.

Another object of the invention is to provide a machine adapted to be manually pulled and which is so constructed that it is capable of applying a coating of a width greater than the spacing between the supporting wheels of the machine, so that the machine and its operator will not come in contact with the part of the surface previously coated.

Other objects and advantages of the invention will hereinafter become more fully apparent from the following description of the drawings, illustrating a presently preferred embodiment thereof, and wherein:

Figure 1 is a front elevational view, partly in section, of the coating machine;

Figure 2 is a rear elevational view thereof;

Figure 3 is an enlarged longitudinal sectional view taken substantially along a plane as indicated by the line 3-3 of Figure 1;

Figure 4 is a fragmentary horizontal sectional view taken substantially along a plane as indicated by the line 4-4 of Figure 3;

Figure 5 is a fragmentary top plan view of the ma chine;

Figure 6 is an enlarged fragmentary vertical sectional view taken substantially along a plane as indicated by the line 6-6 of Figure 1;

Figure 7 is an enlarged fragmentary vertical sectional view taken substantially along a plane as indicated by the line 7-7 of Figure 2;

Figure 8 is an enlarged fragmentary vertical sectional i atent r as view taken substantially along a plane as indicated by the line 8-8 of Figure 2;

Figure 9 is an enlarged fragmentary longitudinal sectional view taken substantially along a plane as indicated by the line 9-9 of Figure 2;

Figure 10 is an enlarged fragmentary vertical sectional view, taken substantially along a plane as indicated by the line 10-10 of Figure 1;

Figures 11 and 12 are enlarged fragmentary vertical sectional views, taken substantially along planes as indicated by the lines 11-11 and 12-12, respectively, of Figure 5, and

Figure 13 is an enlarged cross sectional view of a portion of the burner.

Referring more specifically to the drawings, the coating machine in its entirety is designated generally 15 and includes an elongated tank 16 which is disposed crosswise of the longitudinal axis of the machine and which has a substantially upright rear wall 17, a downwardly and rearwardly inclined front wall 18, a substantially fiat bottom portion 19, which extends rearwardly from the bottom of the front wall 18, and a downwardly and then upwardly curved rear bottom portion 20, as best seen in Figure 3. The rear edge of the bottom 21) and the lower edge of the rear wall 17 have outwardly flared spaced lips 21. The tank 16 also includes upright end walls 23 and 24 which are secured to ends of the tank Walls 17, 18, 19 and 2t and the ends of the lips 21. The top of the tank 16 is closed by a top wall 22 and by hinged covers 25 which are located at the ends of the tank 16 and which may be swung upwardly and inwardly to open positions for filling the tank, as will hereinafter be described. The bottom portion 29 forms a sump chamber 26 in the bottommost portion of the tank and at the rear thereof. A pipe 27 is disposed in and extends longitudinally of the sump chamber 26 and has circumferentially spaced portions secured to the inner sides of the lips 21 for completing and sealing the tank. Said pipe 27 extends through the end walls 23 and 24 and is sealed thereto, and has its ends spaced outwardly from said end walls.

An angular shell or casing member 28 includes a bottom wall 29 the rear edge of which is secured to the bottom portion 20 of the tank, and an upright front wall 30, the upper edge of which is secured to the outer side of the tank front wall 18, near the top of the tank. The end walls 23 and 24 are each of a size and shape corresponding to the cross sectional shape of the tank 16 and the casing 28 and have front and bottom edge portions connected to the ends of the casing member 28, as seen in Figure 4, to combine therewith and with the bottom 19 and portions of the bottom part 20 and front wall 18 to form a burner chamber 31.

Axles 32 are fixed to and extend outwardly from the ends of the casing bottom 29 and have wheels 33 journaled thereon and which are disposed beyond and adjacent the ends of the burner casing 31, as best seen in Figures 1, 2 and 4. A bracket 34 is fixed to and extends forwardly and upwardly from the bottom part of the casing front wall 30 and intermediate of the ends thereof. Said bracket 34 has an opening 35 at its forward, free end and a plurality of arcuately spaced openings 36 between its secured end and the opening 35 and each of which is spaced the same distance from the opening 35. An elongated handle 37 is detachably and adjustably connected to the bracket 34 by a fastening 38 which extends therethrough and through the opening 35 and by a second fastening 39, which engages the handle 37 and a selected one of the openings 36 for positioning the handle at a desired angle relative to the axis of the bracket 34. The handle 37 extends upwardly and 3, forwardly from the bracket 34 and has a crossbar at its free end forming a handgrip 4%, as seen in Figure 5.

The fork of a caster wheel 41 is swivelly connected to the lower end of a post 42 whichhas an enlarged flat upper end forming a plate 43, as best seen in Figure 3. The plate 43 has three aligned openings 44 which are selectively engaged with the fastening 38 to adjust the level of the caster wheel relative to the bottom of the tank 16 and burner chamber 31. Said plate 43 has arcuately spaced openings 45, a selected one of which can be positioned to be engaged by the fastening 39 to vary the angle of the post and caster wheel relative to the casing front wall 36. Thus, the caster wheel can be adjusted to raise or lower the front and rear of the tank 16. Said caster wheel combines with the wheels 33 to form the three supporting wheels of the machine 15, with the wheel 41 disposed forwardly of the wheels 33.

A fuel tank 46 is mounted on the intermediate portion of the top 22 of the tank 16. The inlet end of a fuel supply pipe 47 is located in the tank 46, near the bottom thereof. The supply pipe 47 is provided with a manually controlled regulating valve 48, which is disposed above the tank 46.

A pump 49 is supported by the front wall 30- and has a part extending therethrough into the upper part of the chamber 31, and to which part is connected an end of an inlet pipe and an outlet or supply pipe 51. Said pipes 50 and 51 extend from the pump 49 into the tank 16 and said front wall 18 is sealed around said pipes, as seen at 52 in Figure 3. The other end of the inlet or suction pipe 50 opens into the lower portion of the sump chamber 26 and the other, discharge end of the supply pipe 51 has outlet branches 53 which discharge into the pipe 27 at longitudinally spaced points, as seen in Figure 4. The pipes 50 and 51 and the pump 49 form a pressure conduit system between the sump chamber 26 and the pipe 27.

A portion of the pipe 27, which is exposed between the lips 21, is provided with a series of longitudinally spaced discharge orifices 54, as best seen in Figure 9. A sliding plate valve 55 fits flush against said exposed part of the pipe 27 and is held slidably thereagainst by guides 56 which overlie the longitudinal edges of the plate valve 55 and which are secured to and project from the edges of the lips 21. The valve 55 has openings or orifices 57 which may be disposed either in or out of registration with the orifices 54. A fixed stop 58 is secured to one end of the pipe 27 and is disposed to be engaged by an end of the valve 55 when said valve is in a closed'position with its openings 57 out of registration with the orifices 54. A bracket 59 is secured to the other closed end of the pipe 27 and supports a setscrew 60 which is engaged by the other end of the valve 55 when the valve is moved to an open position. The setscrew 60 is adjustable to vary the extent of movement of the valve 55 toward a fully open position, such as illustrated in Figure 9.

A bell crank 61 is pivotally mounted at its apex by a pin 62 on the forward side of the rear wall 17. A pin 63, which projects outwardly from the intermediate part of the valve 55, loosely engages a slot 64 in the outwardly offset lower end of the bell crank 61. A spacing washer 65 is mounted on the pin 63 between the valve 55 and said slotted bell crank end. A pull spring 66, as seen in Figure 2, is anchored to the rear wall 17 and is connected to the depending leg of the bell crank 61 for urging said leg to swing in a direction to move the valve 55 toward the fixed stop 58, to a closed position of the valve.

A small power source, such as a gasoline engine 67, isn lounted on and secured to the tank top 22 between the tank 46 and one of the hinge covers 25. The engine drive shaft68 is connected to the shaft 69 of the pump 49 by a belt andpulley drive 70 and a clutch 71 which is slidably connected to the engine shaft 68 and which detachably connects said engine shaft to the belt and pulley drive 70. The clutch 71 is actuated by a lever 72. The lever 72 is pivotally supported by a bracket '73 carried by the engine 67. A lever 74 is swingably connected to the handle 37 near the grip 40 for swinging movement longitudinally of the handle, and said lever is retained in different adjusted positions by a conventional latch 75. A cable 76 has one end secured to the lever 74 and an opposite end secured to the lever 72. A cable 77 is secured at one end to the lever 72 and at its opopsite end to the other horizontal arm 78 of the bell crank 61. The cable 77 passes through sets of guide rollers 79 and 80, each of which includes a bracket 81 fixed to the top wall 22 and which supports two roliers 82 between which the cable 78 is trained.

A heavy gauge mesh wire fabric screen of fine mesh, designated 83, is supported in the tank 16, above and adjacent the conduits 50 and 51 by brackets 84'which are secured to the tank walls.

A burner 85 is mounted in and extends longitudinally of the chamber 31 and has orifices 86 as best seen in Figures 4 and 13, opening forwardly toward the bottom portion 26 and upwardly toward the bottom portion 19 of the tank 16. The burner 85 is connected to the opposite discharge end of the fuel supply conduit 47. A bafiie 87 is supported by the front wall 18 within the chamber 31 for concentrating the heat in the bottom of said chamber but to permit a sufficient part of the heat to reach the top of the chamber 31 for heating the pump 49 and the parts of the conduits 50 and 51 which are located in the chamber 31, as seen in Figure 3. One end of a pipe 88 is connected to the conduit 51 near the pump 49 and the opposite end of said pipe supports a pressure gauge 89 on the forward side of the wall 30 and in a position visible to the machine operator for indicating the pressure in the supply pipe 51 and discharge pipe 27.

One end of a rigid curved tube 90 is secured in and extends through the front wall 18, as seen in Figure 7, beneath the screen 83.' The other end of the tube 90 terminates in the sump chamber 26 and supports a heat responsive element 91, to which is connected one end of a pipe 92. The pipe 92 extends upwardly through the tube 90 and thence upwardly behind the tank and connects with a temperature gauge 93. at its upper end. The gauge 93 is disposed above the tank 16 and to one side of the tank 46 and in a position visible to the machine operator.

The inlet or suction pipe 50 has a, shutoif valve 94, disposed in the burner chamber 31, which is manually operated by a lever 95, which is disposed forwardly of the front wall. 30. 'One end of a branch pipe 96 connects with the suction pipe 50 between the valve 94 and pump 49, and said pipe 96 has an opposite lower end which opens downwardly and which is disposed at an exposed position, forwardly of the burner chamber 31, as seen in Figure l. The branch suction pipe 96 has a shutoff valve 97, which is likewise disposed forwardly of the wall 30.

One or both of the covers 25 can be opened for filling the upper part of the tank 16 with pieces of asphalt, not shown, which is supported in the tank on the foraminous bottom 83. The valve 48 is opened to supply fuel from the tank 46 through the pipe 47 to the burner 85, for heating the chamber 31 and the bottom of the tank 16. As the tank becomes heated to a sufiicient extent the solid fuel liquefies, and passes downwardly through the screen bottom 83 to fill the sump 26. The screen 83 prevents any solid pieces. of the asphalt entering the lower part of the tank and additionally excludes trash from the bottom of the tank and which might stop up the conduits 50 and 51. When the liquid coating material or asphalt has reached a proper temperature, as visually indicated on the gauge 93, the handle 74 is pulled rearwardly and latched in its position of Figure 3 for engaging the clutch 71 and for moving..the valve 55 to an open position against the action of-the spring 66. The liquid coating material is drawn from the sump 26 through the suction pipe 50, pump 49 and supply pipe 51 into the pipe 27 from which it is discharged under pressure through the aligned orifices 54 and 57 for coating a surface over which the machine 15 is being pulled and which may constitute a roof 98. The coating as thus applied to the roof surface is of a width greater than the spacing between the wheels 33, as said discharge orifices are formed in the end portions of the pipe 27 and valve 55, which are located beyond the ends of the tank 16. The pump 49 will build up sufficient pressure in the pipe 27 so that the liquefied coating material will be discharged uniformly through the registering discharge ports from end-to-end of said pipe for applying an even coating. As previously described, the caster wheel 41 can be adjusted to vary the direction of discharge of the coating material.

Before storing the machine 15, the valve 94 is closed and the valve 97 is opened. The lower end of the pipe 96 is submerged in a receptacle not shown, containing a cleaning fluid, such as oil, which is drawn upwardly through the pipe 96 by the pump 49 and forced through the pipe 51, pipe 27 and orifices 54 and 57, for cleansing said parts of the coating material. The valve 94 is maintained open except when the conduit system is thus being cleansed.

When the lever 74 is unlatched and released the spring 66 will rock the bell crank 61 for closing the valve 55 and for exerting a pull on the cables 77 and 76 to swing the lever 72 to a position to release the clutch 71.

A filling port 99 may be provided in the upper part of the tank 46 and which is normally closed and sealed by a plug 100. The plug 190 may be equipped with a conventional air valve 101 through which the tank 46 can be pressurized.

Handles 102 may be provided on the ends of the tank 16 for lifting the machine 15.

The end wall 23, for example, may be provided with an access opening 103 affording access to the burner chamber 31. The opening 103 can be closed by a hinge closure 104, as seen in Figure 4. Vent openings 105, as seen in Figure 3, may be provided in the casing 28 for admitting air to the burner 85.

Various modifications and changes are contemplated and may be resorted to, without departing from the function or scope of the invention as hereinafter defined by the appended claims.

I claim as my invention:

1. A coating applying machine comprising an elongated body including an elongated tank and an elongated heater casing connected to said tank, said body including a forward side and a rear side, said heater casing constituting a part of the forward side of the body, said tank having a slot extending from end-to-end thereof and located adjacent a rear side and bottom of the body, an elongated pipe, having closed ends, secured in the tank 6 and disposed to close said slot, said pipe having discharge openings opening through said slot of the tank, a conduit system located within the bottom portion of the tank and partially within said heater casing adapted to supply a coating material under pressure from the bottom portion of said tank to said pipe, a driven pump interposed in said conduit system including a part disposed within the heater casing, a burner disposed within the heater casing beneath a part of the tank for heating the tank and said conduit system and pump, said tank having at least one opening in the top thereof through which the tank is adapted to be filled with solid pieces of coating material to be melted by the heat from the burner, and means providing a wheeled support for said body.

2. A machine as in claim 1, said wheeled support comprising a pair of rear wheels and a front wheel, and means for adjusting said front wheel for rocking the body about the axis of the rear wheels for varying the angle and elevation of the discharge ports of said pipe.

3. A machine as in claim 2, said pipe and the discharge ports thereof extending to beyond the ends of the tank for applying a coating of a width greater than the length of said body and greater than the spacing between said rear wheels.

4. A machine as in claim 1, said tank having a bottom rear portion extending from end-to-end thereof disposed behind the heater casing and behind and adjacent the burner and forming an elongated sump chamber in which said pipe and the inlet end of said conduit system are disposed.

5. A machine as in claim 1, a branch pipe connected to said conduit system between the inlet end thereof and said pump, said branch pipe having an inlet end disposed externally of the machine body, a shutofi valve in said branch pipe normally disposed in a closed position, and a normally open valve in said conduit system between the branch pipe and the inlet end of the conduit system whereby the conduit system, pump and pipe are adapted to be cleansed when the valve of said branch conduit is opened and the last mentioned conduit system valve is closed for creating a suction in the inlet end of the branch conduit.

References Cited in the file of this patent UNITED STATES PATENTS 1,051,832 Dunn Jan. 28, 1913 1,457,634 Neri June 5, 1923 1,707,425 Baker Apr. 2, 1929 1,855,961 Hargrave Apr. 26, 1932 1,925,832 Fox Sept. 5, 1933 1,933,403 Wilson Oct. 31, 1933 2,299,717 Emmons et a1. Oct. 20, 1942 2,373,171 Daly Apr. 10, 1945 2,772,038 Morrissey Nov. 27, 1956

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