US1575423A - Oil-dispensing pump - Google Patents

Description

March 1926.

2 Sheets-Sheet l INVENTOR.

P W FENTON OIL DISPENSING PUMP Filed April 8. 1925 ATTORNEY.

March Z 1:926.

P. W. FENTON OIL DISPENSING PUMP Filed April 8, 1925 2 Sheets-Sheet 2 A TTORNEY.

Patented Mar. 2, 1926.

UNITED STATES .IPAUL W. FENTON, OF vINEVV YORK, N. Y.

OIL-DISPENSVING EURIP.`

Application filed April 8, 1925. Serial No. 21,506.

To all whom it may concern.'

Be it known that I, PAUL W. FENTON, a citizen of the United States, residing at the city of New York, in the county ofNew York, State of New York, have invented certain new and useful Improvements in Oil- Dispensing Pumps, of which the following is a specification.

My invention relates particularly to the class of pumps used for dispensing lubrieating oils and the object thereof is to provide a simple, reliable and efficient device of this character. A

Lubricating oils, particularly for automobile use, are usually distributed to filling stations in barrels or special containers. Various means have been provided for retailingsuch oils to consumers, measuring the oil in small quantities, and, in some instances, pumps have been provided for pumping the oil from such barrels or containers into a measuring device. In Vsuch pumps heretofore used, the oil drips from the discharge nozzle `after the operation of the pump is completed and the pump is often operated by unauthorized persons just for the amusement of `seeing' the oil flow, and for these reasons means have been pro- -vided to return the drip or oil needlessly pumped, back to the container, but such means were either cumbersome orpermitted the oil to become contaminated with foreign matter beforev its return to the container. The object, therefore, of my invention is'to of the pump and to lessen the liability of the pumpjbeing operated for no useful purpose.

A further object of my invention is `to filled is removed from its filling position.

These primary objects, and others, perhaps ofpa subordinate nature, I accomplish by means hereinafter describedand shown in the accompanying drawings which form a part of my specification.

In the accompanying drawings Fig. 1, is a vertical sectional view of a measuring pump embodying features of my invention.

Fig. 2, is a detail view, partially in section on line II-II of Fig. 1, showing the yrack and pinion for operating the piston 5 of the pump.4 5 l Fig. 3, is a view in elevation from the left rack 3.

prevent the drip of oil after the operation- Fig. 5, is a section showing a modified yform of my discharge nozzle.

.A preferred type of pump comprises a piston `1, adapted to reciprocate in kthe cylinder 2 and to be actuated by the pinion 4 having teeth meshing with the teeth of the- This pinion is mounted upon a shaft 5 to one` end of which is also secured a hand-crank 6. The lower head 7 of the cylinder 2 is provided with a threaded por `tion 8 for the purpose of securing the pumpV 70 in the head of the container' from which'. oil is to` be pumped, the container not being shown in the drawings. A pipe 9 extending to substantially the bottom of the container and secured in the headmay be formed with an extension 14 to serve as a passage for the oil and affording space in which the rackmayl be` reciprocated. The upper head is apertured'to permit the passing of the rack therethrough and also in addition thereto leaving space .n suthcient for the passage of the oil from the cylinder to the extension of said head. At provide means for automatically closing the outlet at the instant the container being the top of the extension or piper14 is inserted a set-screw 15 for the purpose of adliustably limiting the travel upwardlyy of the rack 3. To this extension `or ipe 14 is secured by threaded or other sultable en,- gagement a short pipe 16 "and on one end of the pipe `16 is secured -the nozzlehas# sembly, though manifestly the -pipe 16` may be omitted and thenozzle assembly secured directly to the pipe 14. v f. y

'Ihe nozzle assembly comprises a hollow cylindrical member 17, the lower side of which is provided with a lug 18: to which is pivoted in any suitable manner an arm 19. The outer endof the member 17 and at the top thereof, is apertured to receive a nut 20 110 75 cylinder-head 7, affords a means through mit the passageof oiltheiethrough whenl the valve-head 28 is lifted from its seat; In the lower portion ot' the member 17 is secured by threaded engagement 1a' cylindrical member 2l, open at the bottom, and which may be termed a sleeve in which there are openings 25 to receive a Spanner wrench by which it may be tightened. IVithin the sleeve 2l is mounted an expansible metal diaphragm 26. A discharge outlet tube 27 is provided with a llange 28 against which the lower edge of the diaphragm Yis pressed by 'means of a nut 29 which is locked in place by a set-screw 30. The voutlet tube 27 thus extends through the central-portion of the diaphragm and terminates a short distance below the valve head 23 and is provided with-openings 31 to permit the oil to pass from the diaphragm into the discharge tube 27. The valve head is provided with Va stem 32 which extends into the upper end ol` the discharge tube 27. The arm 19 is bent upward and is provided with a slotr near its upper end at 53, into whi-ch is fitted a guide-screw 34: which is secured by threaded engagement to the outer end of the member 17. The arm 19 is also apertured to receive the discharge tube 27, suicient cle-arance being allowed to accommodate forV the changed position `of the lever when the lat- 'ter Vis forced upward for the purpose hereinafter described.

In Fig. L5, I have illustrated a modified form omy nozzle assembly in which I have substituteda coil spring 35 for the expansi- Vble idiaphragm necessitating certain other changes among which are'. that the :stem of the valve is lengthened and the lower end 36 is bored out and openings 37 are provided therein to permit the passage of oil fromy :the vsleeve 38 tothe bore 36 in the stem 32.

A member .39 is adapted to i-t within the sleeve 38 and is bored to form a discharge outlet 4() and also to suitably receive the lower end of the stem 32. A space 41 bev tweenithe lower end of the stem k32 and the upper end of the discharge outlet is provided ttor the purpose hereinafter described. vIn this construction is also provided a pisten ring 42 which is held in a groove in the Y member 89 rand serves to prevent the passage of oil between the sleeve 3S and the member 39.' The opening 22i'orming the seat for stood.V lVhen the valve 23 is fin closed posi-V tion as shown in Fig. 1, removal of any oil from the pump is prevented until the valve is first opened. When it is desired to remove oil through the discharge nozzle a receptacle in which the oil is tobe received is placed under the discharge nozzle and pressure is applied in an upward direction. By reason of the edge of the receptacle coming in contactwith the arm 19, if the pressure is applied to the receptacle, the force will be transmitted through the receptacle to the arm and the arm will be vforced upward carrying with it the discharge tube 27 but this movement will not open the valve until the top of the'discharge tube comes in contact with the bottom of the valve 'head,'whereupon any-further movement in the saine direction will open the valve and the pump may then be operated to discharge oil from the pump to the receptacle. I-t will be seen that during the dischargingoperation the several arts will be in the oosition shown in Fir-v. 4

so far as the nozzle assembly is concerned. The operation ofthe pump draws the oil 'from the container through the chech valve i3 in the lower head 7 ot' the pump and at the same time forces the oil above the piston 1 out through, the discharge nozzle. When thek piston 1 is lowered the check valve il lis opened and 43 i-s closed, thus forcing the oil which has been previously drawn into the cylinder to pass through the valve 44,

above the piston.

lhenxthe receptacle is withdrawn, the varm 19 intsantly drops to its original position bv reason ofthe force of gravity and initially `also by the pressure of the spring '21 upon the valve head 23. However, it will be noted that the valve head 23 will seat before the diaphragm has fully expanded andthe further expansion of the diaphragm will tend to create-a vacuum next to the valve head and'prevent the oil remaining Within the diaphragm and discharge tube from drip ping out.y

As shown in Fig. 5, the valve stem 32 does not 4.extend to the bottom of the bore of the member 39 in which it is mounted and there is a space Ill between the lower end of the valve stem .and the `member 39 and thereforet-he member 39 may be. moved i'ipwar-d va short distance before it contacts with the valve stem to lift the valve. In thisforin lotnozzle the valve also closes betore the member 39 has reached its lowest or normal position andthe continued downward movement Iof themember 39 after the 'valve has closed, tends -to create a vacuum around the valve head and holds 'the oil remaining below the valve head from dripping out of the vdischarge nozzle.

Having thus fully described my inven-.

tion and it-s mode of operation, what I` claim is: y

1. In Van oil-dispensing device, a ypump provided with means for conveying oil therefrom, a nozzle secured to said oil conveying means and comprising a member provided with an oil chamber and an outlet thereto, a valve adapted to open and close the outlet, an oil receiving chamber below said outlet and communicating therewith, means for opening the valve and contracting the oil receiving chamber while the valve is being opened, means for closing the valve, and means for expanding the oil receiving chamber after the valve is closed.

In an oildispensing device, a pump provided with means for conveying oil therefrom, an outlet for said oil-conveying means, a valve in said outlet, an oil receiving chamber below said outlet and commitnicating therewith, means for opening the valve and contracting the oil receiving chamber while the valve is being opened, automatic means for closing the valve, and means for automatically expanding the oil receiving chamber after the valve is closed.

3. In an oil-dispensing device, a pump provided with means for conveying oil therefrom, an outlet for said oil conveying means, a valve in said outlet, an oil receiving chamber below said outlet and conmiunicating therewith, means for opening the valve and contracting the oil receiving chamber while the valve is being opened, means for closing the valve and means for expanding the oil receiving chamber after the valve is closed.

4. In an oil-dispensing device, a pump provided with mea-ns for conveying o1l therefrom, an outlet for said oil conveying means, a valve adapted to open and close said outlet, an expansible diaphragm below said outlet and adapted to receive oil from the outlet, a member adapted upon application of pressure thereto to compress said diaphragm and open the valve, means for automatically closing said valverwhen said pressure is released and before said diaphragm has reached the limit of its eXpansion.

5. In an oil-dispensing device, a pump" ber, means fo-r automatically closing the valve, and means for increasing the capacity of the oil receiving chamber after the valve is closed.

Signed at the city of New York, count-y of New York, State of New York, this 3rd day of March, 1925.

PAUL W. FENTON.

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