US1170756A - Pump. - Google Patents

Description

-.|. M. KELLEY.

v l PUMP.

APPLlCATION FILED MAR. i6. 1914.

1 1 70,756. Patented Feb. 8, 1916. A

" TED sTa'rEs PATENT GFFICE JHN M. KELLE'VY, 0F ROCHESTER, NEW YORK.

PUMP.

To all ywhom z't may concer/n.' A

Be it known that I, JOHN M. KELLEY, of Rochester, in the county of Monroe and `State of New York, have vinvented a new and useful Improvement in Pumps, which tion of the pump sothat none of the liquid can enter the pump chamber, while, at the same time, the valve between the pump chamber and the liquid container is prevented from freezing or sticking to its seat.

To these and other ends, the invention consists in certain parts and combinations of parts all of which will rbe hereinafter described, the novel features being pointed out in the appended claims,

In the drawings: Figure 1 is a vertical section through a sprayer embodying the present improvements; Fig. 2 is an enlarged vertical section through the lower end of the pump; and Fig. 3 isa horizontal section on the line af-a, Fig. 2.

:in fire extinguishers of the type employing carbon tetrachlorid as the extinguishing liquid, great difficulty has heretofore been experienced in keeping the liquid from the pump' chamber ,when a portion'of the latter has been immersed in the liquid, and it has been found that when a cupshaped leather piston is employed in such a sprayer, the effectiveness of such piston is immediately destroyed upon contact with the carbon tetrachlorid. It has also been found that even though non-corrosive metal be employed in the valve of the pump, such valve will stick or freeze to its seat under the action of carbon tetrachlorid. l

The above disadvantages are overcome by the construction herein set forth in which- 1 indicates the container of any suitable construction preferably having a manually vcontrollable discharge nozzle 2 and provided with a re extinguishing orv other liquid 3. The top wall of the container may be provided with a central opening formed by a sleeve 4 which is internally threaded to receive an externally threaded cap 5 on the Specmcation of Letters Patent.

forms the pump chamber, the cap being provided with openings 7 to permit the intake of air within the pump chamber above ther piston to be described. l

The lower end of the cylinder 6 may be closed by a head 8 which may be provided wlth a central discharge opening 9 and the latter may be closed by a valve 10 preferably 1n the form of a plunger having a .coneshaped upper end 11 for seating against the lower end of the discharge passage 9. The tapered portion of this valve may operate within the chamber 12 formed at the lower end of the discharge passage 9 and having suitable c tlets 13 communicating with the interior of the container 1. The lower Wall of this chamber 12 may be in the form of a bushingl which closes the chamber and guides the plunger 10. A coiled spring 15 may abut the shoulders formed by the tapered vupper end of the valvey and the upper surface of the bushing and tends normally to cause the valve to close.

Patented Feb. 8, 191.6. -Application nieu mich 1e, 1914. semi No. 825,080.

Within the pump chamber, a pump piston -1 gagement with the central portion of the cup piston, thenut and washers operating 'on a reduced screw threaded portion of the piston rod 21 and the screw threaded portion being projected beyond the nut so that it may be made t0 extend at 22 into the discharge passage 9 in order to engage with the upper end 11 of the valve 10 so as to displace the valve from its seat. rlhis engagement between the extension 22 on the pump pistonand the valve cannot occ-ur during the normal operations of the pump piston but only after the extension has been rotated in order to engage with the screw threaded wall 23 of the discharge opening.

Prior to the disengagement of the valve lfrom its seat by the extension 22, the latter has, by its. engagement with the screw threaded portion .23, formed' an effective valve or closure forthe discharge opening 9, so that, when the'valve 11 is displaced from its seat, liquid cannotl flow from the container 1 into the pump chamber by way of the discharge 9.

Another feature which adds to the life of the pum is the means forironing or pressing out t e operative ange of the pump lpisupward annular-extension 25 on the head 8,

the upper part of said annular pocket being wider than the lower part in order that the flange of the piston, even though sllghtly distorted or wrinkled, may enter the pocket,

the turning of the piston and the advancement thereof by the screw thread serving to press or iron out the flange until finally the lattei" is received within the restricted portion of the annular pocket 24.

From the foregoing, it will be seen that there has been provided a sprayer in which the valve between the pump and the container can be held away from its seat when the device is inoperative, While yet effectively closing the communication between the cylinder and the pump chamber to prevent the entrance of the liquid Within the pump chamber. Furthermore, the pump is provided with means which permits the pressing or spreading of the cupped pump piston and thus insures that the pump will be ready for action even though the same has not been used for considerable time. The screwing down of the pump piston rod holds the same in a fixed position so that the piston cannot Work outward to its possible detriment. For instance, When the sprayer is carried in an automobile, motor boat, or other vehicle, if the handle Were not so fixed, the rod could or might become bent or, if carried loosely with other things such as tools, etc., the handle might becomecaught or entangled, thus delaying the necessary quick application of the fluid to the fire.

l/Vhat I claim as my invention and desire to secure by Letters Patent is:

1. A pump comprising a cylinder having an outlet, a piston, and a valve controlling said outlet, the piston carrying a projection rigid therewith and movable into engagement with the valve to open the communication.

2. A pump comprising a cylinder having an outlet, a. piston and a vvalve controlling said outlet, the piston carrying a portion I arranged to open the valve and to close the outlet when the piston is moved to open the valve.

3. A pump comprising a cylinder having an outlet, a piston and a valve controlling said outlet, the piston carrying a portion arranged to open the valve and to close the outlet, said portion being in the form of a projection arranged to enter and close said outlet prior to the opening of the valve.

4. A pump comprising a cylinder having an outlet, a piston, and a valve controlling Said outlet, the piston carrying a portion arranged to open the valve and to close the outlet, said portion being inthe forni of a projection arranged to enter and close said outlet prior to the opening of the valve, and the walls of the outlet having interlocking screw threads so that the projection is advanced toward o-r removed from the valve as said projection is rotated. l

5. A pump comprising a cylinder having a head formed with a discharge passage, a spring pressed valve arranged to close said passage, a cup-shaped leather' piston operating in said cylinder, a piston rod carrying said piston and projecting beyond the latter to enter the discharge passage to close the latter and then to open the valve.

6. A pump comprising a cylinder having an internal annular pocket at one end, a cupshaped piston operable in said cylinder, and a screw portion carried by the piston and adapted to cause the flange of the piston to enter the pocket.

7. A pump comprising a cylinder having an internal annular pocket at one end and a screw threaded portion, a cup-shaped piston operable in said cylinder, and a piston rod connected to the piston and having a screw threaded portion adapted to cooperate with the screw threaded 'portion on the cylinder to cause the flange of the piston to enter the annular chamber to be pressed out by the latter.

JOHN M. KELLEY. Witnesses: i

HAROLD H. SIMMS, ADA M. lVHrrMoRE.

Images