US1108903A - Pump. - Google Patents

Description

H. W. HANCOCK.

PUMP.

APPLICATION FILED MAR. a1, 1913.

Patented. Sept. 1, 1914.

HARRY W. HANCOCK, OFCHARIIQTTE'MICHIGAN;

PUMP.

Specification of Letters Fatent.

Patentedfiept. 1,- 159314.;

, a li tion filed March 31, 191a,. SerialI\To. 7-57,807.

To all whom it may concern:

Be it knownlthat I, HARRY W. HANcooK,

a citizen of the United States, residing at Charlotte, in the county of Eaton and State of Michigan, have invented certain new and useful Improvements 111 Pumps, of which the followingis a specification.

My invention. relates to improvements in pumps and contemplates more particularly an improved air pump for use on automobiles for the purpose of pumping air to any desired place as, for example, into the gasolene tank to force the gasolene therefrom.

The nature of the invention will be more fully understood from the following description taken in connection .with the accompanying drawings in which,

Figure 1 is a longitudinal central sectional view through a pump embodying the features of my invention. Fig. 2 is an elevation,

from the left side of Fig. 1 showing {parts broken away. Fig. 3 is an end view of the cylinder taken from the upper end of Figs.

1 and 2.

Tn the exemplary embodiment of my invention which I have shown in the drawings. the pump cylinder comprises a cylinder proper 1, a cap 2 threadedon and closing one of its ends, and a head 3 closing the opposite end thereof. Within the cylinder is slidably mounted a plunger 4 having an operating stem or rod 5 which is slidably mounted in a bearing opening 6 in the cap 2. Said rod has a handle 7 fixed upon its outer or upper end.

In order to insure that a controlling valve, to be later described, 'which is operable by the plunger, will always be in its open position before the handle of the plunger can be drawnputwardly, I provide an interlocking engagement between the rod 5 and'the cap, 2 which prevents longitudinal movement of the plunger unless it is rotated into the position to open said controlling valve. This interlocking engagement -may be provided for in different ways, the exemplary form which-ll have herein showncomprising-a pin 9 fixed in the rod 5, said pin being movable by rotation of said rod into register with a groove 8 in the cap communicating with the bearing opening 6 for the plunger rod. This construction prevents withdrawal of the rod unless the pin 9 and groove 8 are in register,

when the controlling valve above mentioned will always be, in its open position. A lug 10, on the inner face of the cap 2,. provides two opposite steps against which the pin 9 s arranged to abut whenthe rod ,5 is rotated in opposite directions.

The head the present instance a :disk 11' which is" of less diameter than the internal diameter of the cylinder, saiddisk bearing against a shoulder formedon the rod 5 by the reduced inner end of said rod. A flexible member 12 es of leather, rubber, or other suitablematerial 1s fitted oversaid reduced end and. is arranged to lie against the disk 11., A plurality of ports 13 are provided invthe member 12. The peripheral portion 12 of the 7o member 12 is turned at an angle to the body thereof and extends along and contacts the inner wallof the cylinder. A plurality of radial fingers 14 have at their ends bearing against the peripheral portion 12" '0f.the

member 12, said fingersbeing of spring ma terial such as sheet metal'and tending to hold the portion12 in tight contact with the cylinder; Between the fingers ld and the member 12 is a washer 15. The parts so 11, 12, 14 and 15 are clamped together and against the shoulder on the rod 5 by means of a member 16 threaded on the reduced end of sagd'rod and bearing against the fingers 14.-

bifurcated to receive the stem of a valve member to be presently described, and said member 16 has an annular groove 18 in which fits onecoil ofa'compression spring 19, said spring-surrounding-the bifurcated end of the member 16.

The head 3 has a passage-way 20 extending therethrough transversely of the cylinder 1, the outer end of said passage-way being '95 enlarged and internally screw threaded to receive a conducton-leading-to the tank or otherplace to which "the air is to be pumped. The inner end of the passage-way 20 communicates with'a passage-Way 21 extending from the inner faceof the head to the outer face thereof. Within the passage-way 21 is ashoulder 22 forming a .valve seat against which a ball valve23- isarranged-to seat. A screw the outer end ofthe passage-way 21, said plunger having-astem 25 arranged to hold the ball 23 in proper position. A tapered opening 26 extends. centrally through the head 3 from t of the plunger 4 comprises in to pin 17 serves torigidlysecure said 85 member 16 to the rod 5. The member 16 is plug Qtisthreadedinto and closes he inner to. the outer face .110

' thereof, and intersects right angles 32 and pin 33 fixed in passage-way 20- to with a vent port 36 opening 26 to the exterior of'the head.

the passage-way 20. In this opening 26 is rotatably fitted a valve plug 27 having a stem 28 which the bifurcated end of the member 16 is arranged to embrace at times. The valve member 27 also has a stem 29 at its'opposite end, and surrounding this stem of the head 3 is a coiled spring 30, said spring hearing at one end against the washer 31 and at its opposite end against a washer When the pump is to be used upon an automobile, it maybe provided with'lugs 37 having openings 38 therein to receive fastening devices for securing the pump to a suitable support.

When the stop pin 9 lies at the inner side of the cap 2, the member 16 and the valve stem 28 will necessarily be interlocked. The normal position of the parts is clearly shown in Fig. 1 and in such position of the parts the port- 34 in the valve plug will extend transversely of the passage-way 20, so that said passage-way will be closed. In this [position of' the valve plug the stop pin 9 will abut against the When the stop pin of the lug 10 or next right-hand shoulder .to the word Shut in Fig. 3. "When it is desired to operate the pump, the operator turns the handle 7 ninety degrees to the left which will bring the stop-pin 9 into register with the groove 8. The handle may now'be drawn away from the cylinder and the spring 19, which is under compression when the pin 9 is at the inner side of the 'cap 2, will tend to force the plunger outwardly to carry the pin out through the groove 8. In moving the handle 7 to bring the pin 9 into register with the groove 8, the valve plug 27 will have been simultaneously rotated to bring the port 34 into register with the passage-way 20. 9 is at the outer side of the cap 2, the bifurcated member 16 will have been moved out of engagement with the stem 19 of the "alve plug, so that the handle 7 can be rotated freely without affecting the position of said plug. During the pumpingoperation the spring 19 acts as a cushion to prevent shock to the parts at the inner end of the, plunger stroke. Said spring also serves to prevent rattling of the parts when in their normal position.

As thezplunger t is drawn outwardly, air

29'at the outer sidecompressing )asses around the edge of the disk 11 and through the ports 13 in the member 12 into the space between the plunger 4 and the head 3. In such outward movement of the plunger the member 12 moves away from the disk 11, so that the air can pass freely through the ports 13. When the opposite or movement 'of the plunger is commenced, the member 12 will be forced tightly against the disk 11 so that the ports 13 are closed by said disk. As the plunger is now moved toward the head 3, the air will be forced past the check valve 23, through the ports 21, 20 and 34 and through the conduit to the tank or other place desired. In the outward movement of the plunger the pressure of the air in the tank holds the ball 23 tightly seated against the valve seat 22.-

It will be noted that the stem 25 holds the ball at one side of the port 20 so that the ball will always be in position to be closed by the pressure of the air in the tank. When sufficient air has been pumped, the operator may return the parts to their normal position, as shown in 1 and above described. lln case it is desired to withdraw all or a portion of the air in the tank, this may be done by rotating the rod 5 to the left a half revolution from the position shown in Fig. 1 when the stop pin 9 will abut against the left-hand shoulder of the lug 10 and point toward the word Vent in Fig. 3. This movement of the rod 5 will rotate the valve hundred eighty plug 27 through degrees and bring registry sage-way interior of the tank. At the same time; one end of the port 34 will be moved into registry with the vent port 36 leading to the exterior of the head and the atmosphere. The air in the tank may now escape through the passage-way 20 and ports 35, 34 and 36.

T have herein described the present embodiment of my invention in considerable particularity for the sake of clearness, but I would have it understood that I do not thereby intend to limit the invention to the precise construction disclosed. I aim to cover in the appended claims all modifications falling within the scope of the invention.

I claim as my invention 1. In a hand pump, in combination, a cylone the vent port 35 into inder having a head at one end provide with an outlet passage extending transversely of the axis of the cylinder, a rotary valve plug extending across said passage and having a port arranged to register with said passage, a plunger 1n said cylinder hav-.

ing a disengageable connection with said plug for rotating the latter, and means for preventing reciprocation of said plunger until said port has been moved into register with said passage.

wlth the outer portion of the pas- 20 and in communication with the 2. In a hand'pump, in combination, a

cylinder hating a head at one end provided with an outlet passage extending trans 'register with said passage, a plunger slidable in said cylinder and having a disengageable connection with said valve plug, a

' coiled compression spring mounted on the inner end of said plunger and arranged to engage said head, said spring tending to force said plunger outwardly, a coiiperating pin and groove on the plunger stem and the opposite end of. the cylinder, the port .in,

said valve plug registering with said passage when said pin registers with said groove, the pin preventing outward movement of the plunger until the pin registers with the groove.

8. in a pump, in combination, a cylinder having an outlet passage,'a valve plug crossing said passage and having a transverse port the'rethrough adapted to register with said passage, said plug also having a vent port leading substantially at right angles from the first mentioned port to the surface of theplug, the cylinder havinga vent passage adapted to register with said vent port in the plug, and a hand-operable plun= ger slidable in said cylinder and adapted to rotate said valve plug.

4. In a pump, in combination, a cylinder having an outlet passage and having a vent opening communicating with said passage, a valve member arranged to control said passage and said vent opening, an outwardly opening check valve controlling said passage between said valve -member and the inner end of said passage, and a hand-operable plunger slidable in said cylinder and arranged to operate said valve.

5. In a pump, in combination, a cylinder having a head provided with a transverse outlet passage and having a vent opening communicatingwith said passage, a rotary operable plunger slidable in'said cylinder and arranged to rotate said valve plug.

6. A pump comprising a cylinder having a head at one end, said head having an outlet passage extending transversely of the axis of the cylinder, a plunger arranged to reciprocate in said cylinder, a rotary valve member positioned concentrically with said cylinder and controlling said passage, a disengageable connection between said valve .member and said plunger, and a handle for reciprocating said plunger and for rotating said valve member through the medium of said disengageable connection.

7. In a pump, in combination, a cylinder having a head closing one end, and a cap closing the opposite end, said head having an outlet passage therein, a rotary valve member mounted in said head coaxial with said cylinder, and a plunger having a disengageable connection with said valve memher for rotating the latter, said plunger having a rod slidably extending through said cap, said rod having a 'projectionarranged to be moved into register with a groove through said cap by rotation of said rod to permit said projection to be moved to the outer side of said cap by endwise movement of said rod, said valve member being in its open position when said projection is in register with said groove.

' 8. In an air pump, in combination, a cylinder having an end-closing cap, and a plunger reciprocably mounted in said cylinder and comprising a rod slidable through said cap, a rigid disk fixed on said rod, a flexible member mounted on said rod and having its peripheral portion in tight contact with the interior of the cylinder, said disk being of less diameter than the cylinder, and said member having a port therethrough to permit the passage of air.

9. In an air compressing pump, in combi nation, a cylinder, a head closing one end of said cylinder and having an outlet there'- in, a cap closing the other end of said cylinder, and a plunger reciprocably mounted in said cylinder and comprising a rod slidable through said cap, a rigid disk fixed on said rod, a flexible member mounted on said rod alongside said disk and having its peripheral portion turned to lie along the inner surface of the cylinder, and yielding means tending to hold said peripheral portion against the cylinder, said disk being of less diameter than the cylinder, and said flexible member having a port therethrough whereby air may pass around said disk and through said port when the plun eris moved vaway from said outlet, said fl exible member being arranged to be forced against said disk to close said port when the plunger is moved toward said outlet,

10. lln a pump, in combination, a cylinder having a head closing one end thereof, said head having a passage extending from its inner to its outer surface and having another passage communicating therewith and extending transversely of the axis of the cylinder, a check valve controlling the firstmentioned passage, a plug closing the outer end of the first-mentioned passage, a rotary valve plug mounted in the head coaxial with the cylinder and having a transverse port therethrough arranged to register with the second-mentioned passage, and a piston reciprocably mounted in said cylinder and having. a disengageable connection withsaid valve plug whereby rotation of said piston the inner end of the passage, a check valve 4 of said plunger and the opposite end of said controlling the passage between said valve member and the inner end of the passa e, I and a hand-operable plunger in said cylin er arranged to operate the first mentioned valve member. 4

12. In an air pump, in combination, a cylinder having a discharge passage in one end thereof, a rotarylvalve controlling said passage, a plunger slidable in said cylinder and arranged to rotate said valve,- and an interlocking engagement between the stem cylinder whereb drawn until sai valve has been opened.

13. In an air pump, in com'blnation, a cylinder having a discharge passage in one end thereof, a rotary valve controlling said passage, a plunger slidable in said cylinder,

a disengageable interlocking connection be tween said plunger and said valvewhen the plunger is near said end of the cylinder, and an interlocking connection between the stem of said plunger and the opposite end of said cylinder, whereby said plunger must be rotated'into position to open said valve before said stem can be drawn outwardly.

said stem cannot be with- In testimony whereof I afiix my signature in the presence of two witnesses,

HARRY Witnesses:

- L. L. MEIER,

C PAUL PARKER.

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