US1320512A - Assigwqk - Google Patents

Description

W. VAN (BUILDER.

FIRE EXTINGUISHING PUMP.

APPLICATION man JULY 21. 1918.

Patented Nov. 4, 1919..

Q25 @Z/i 'WALTER V'AN G-UILDER, OF-GI-IICAGO, ILLINOIS, AS$IGNQBTOASTEWARTEWARNER SPEEDOMETER CORPOBATION, 011' s CHICAGO v I-LLINOIS, ..A CQRPORATIQN; QZE .LVIR" 'GINIA.

guishing-Pumps, of which the following is a specification, reference being had to the accom an in drawin s formin a art b 7 thereof.

The purpose of this invention isto provlde an, improved portable hand-operated pump particularly designed and adapted for use as afire extinguisher, that is to contain a fire extinguishing liquid, or material Which will produce such liquid, to be discharged by means of the pump. The invention consists in-the elements and features of construction shown and described as indicated in the claims.

In the drawings:

Figure 1 is a vertical axial section of the pump embodying this invention.

Fig. 2 is an axial section, in a plane at right angles to that of Fig. 1, of the .discharge end portion of the pump barrel showing the movablepiston at the discharge end of its stroke.

Fig. 3 is a detail section on. the line 33 of Fig. 1.

Fig. 4 is a section on the line 4-4 of Fig. 1.

Fig. 5 is a detail top plan view of a portion of the barrehreservoir and exterior element of the piston operated member at the position of the parts occupied at the end of the piston in-stroke.

Fig. 6 is a section at Fig. 1.

The pump described in. this invention is characterized in general by comprising two telescoping barrels, one of which constitutes the member for operating the piston which reciprocates in the other betweentwo heads fixed with respect to said other barrel, said piston-operating barrel having its outer end closed, so that the two barrels and the said heads and piston comprise three chambers, one between one of the heads and the piston,

the line 6-6, on

the other between the piston and the other head, the third between said other head and the closed end of the pistoneoperating barrel; the connections and communication of the parts being such as to cause two of said Specification ofiLetters rfatent.

.rinn-nxrmenrsnme,rniyrr.

Ch mb i b filled 'bv el ti nat th ..ex

. n li'I lgstroke, while the thirdjc hamber is evacuated at: that stroke, the, opposite stIQke causing ,the ilastgnentioned chamberlto be ll dandth two firs mentiqn d. chambers (t b as atedi s tha -ther izb fi ,lns. se a ev cuati n. a each. strqk nac dir cti --.i 1fu th ich act d.byit mounting upon the outer {or fixed barrel Qof a reservo r from which .the liquid tobe pumped is .drawn, a suction pipeQexteigding from the barrel, to the 1 bottom of said reserlvoir, and the ,reservoir .Lb ing projected downward from the-barrel andadap 'fied. to vserve as a i handle for holding ,the pump whileoperating it.

In the dra, ings, 1 the outer or vfixed barrel, 2. the 11111161 or telescoping barrel which is the piston operating memberhaw ing its inner endconnected to the pistonB. 3 .is the laterally extending reservoir which serves as a handle fonthe device; ,4 is ,a fixed head in the barrellnear the discharge end, said discharge end being provided. with a mouth-piece or nozzle 17 in which'there is mounted a spring-seated stopper 19 for preventing the discharge 1 or leakage fromlthe device when it is not inuse as is ,herei after moreparticularly explained. 5. is1thelf nd head, fixedly positioned in. the barrellnear the opposite end thereof from the headi'fl, said head 5 being ofthe character of apiston .Wlilll respect tothe barrel 2, andbeing held fixed withrespect tothe barrel lby means of two tubes 6 and 7 which connect it with the head 4, and which have functions hereinafter specified. The end. of the barrel 2 opposite the discharge end of the. barrel 1 is .,closed by a cap lO which is preferably inclosed in a handpiece 11, which is a thin metal shell pear-shaped in general form which telescopes outside the barrel land is provided with a close fitting engagement therewith at its innerend by .mea'ns of a ring 12 angular incross section, one cylindrical flange of which makes a.sliding fit on the outside of thebarrel while the other is engaged by the inner end of. the vhandpiece 11 which is folded around ,it asshown in the drawing. Thelreservoirfi which as to its main portion is preferably',;substantially cylindrical and of. convenient diameter 'to' be readily grasped by the hand of the operator, is preferably expanded at its upper end into the barrel 1 at a point which will cause the tube to connect with a radial duct 21in the head 4, through which the liquid drawn in by the pumping operation from the reseri-voir, is conducted into the chambers of the pump, as more particularly hereinafter described. The two tubes 6 and 7 which connect the heads 4 and 5 are concentric, the former within the latter. The exterior tube 7 connects the radial duct 21 of the head 4: with a radial duct 22 of the head 5; and the duct, 22, is connected by a duct, 23, extend ing directly through said head, 5, both with the chamber, C, beyond said head, 5, and the chamber, B, between said head, 5, and the movable piston, 8, which is operatively connected, as stated, with the barrel 2 for reciprocation in the barrel 1 between the two heads 4 and 5. The duct 23 is provided with check-valves 24 and 25 atits opposite ends opening for flow respectively into the chambers C and B. The interior tubej6 extends through the head 4, opening for discharge toward the discharge mouth 17 of the mouth-piece 17. At the other end this tube connects with a transversely extending passage, 27, in the head, 5, which in turn is connected with a passage, 28, extending directly through said head and affording connection either with the chamber, B, or with the chamber, C, according to the direction of fiow' and resultant seating or unseating of the ball check-valve 29 which is positioned in said passage 28 as shown, for seating either at one side or the other of the slight enlargement in said passage which forms the valve chamber. The head 1 has extendingthrough it a passage 26, with a checkvalve 33 seating inwardly. r

At the top of the reservoir 3 there is pro vided a filling plug provided with an air vent which is normally closed bya springseated valve and which opens to admit the air when a partial vacuum 1s created 111 the i reservoir by the withdrawal of liquid therefrom through the action of the pump jthrough the suction tube 20. This filling plug and air vent device comprises a fitting 13 which is protruded into the top of the reservoir, a bushing 14 being provided. for that purpose. The plug fitting 13 has the air ina let port 15 and is counter-bored below this port to afford a chamber for the spring 16 which operates to seat the valve 30 upwardly at the port 15, a check for the opposite end of the spring being provided by the central apertured plug 31 which is screwed into the lower end of the counter-bore. 32 represents a screen which may be inserted above the air inlet 15 to exclude anything which might clog the passage.

The operation of the device may be under stood from the foregoing description to be substantially as follows:

The reservoir 3 being supplied with the liquid through the filling mouth by removal of the plug 13andsaid plug being restored, the pump is in condition for use. Assuming thetelescoping parts to be at the position I shown in Fig. 1, the operator holding the device by means of the barrel 3 and retracting the protruding operating handle 11 will withdraw the interior telescoped barrel 2, moving the movable piston 8 outwardly throughthe chamber B, that is toward the head 5. In this movement at thefirst operation, the chambers of the pump containing only air, air will be discharged from the chamber B through the passage 28 in the head 5, the check-valve 29 being driven to its outer seat, closing communication with the chamber. C, so that the air will be driven through the passage 27 into the inner tube 6 and thence discharged at the .forward end of said tube through the mouth-piece. At the same time the liquid which is sucked in through thesuction tube 20 into the chant ber A-fills said chamber as the piston retreats therein; and at the same'tiine the outward movementof the piston-operating barrel 2 extending the space between the head, 5, and, the cap, 10, causes the liquid to be drawn into the chamber C through the annularinterspace between the tubes 6 and 7,

that is through the tube 7,1illing the chamber C at the same time that the chamber A is filled. Upon the reverse stroke of the piston operating barrel, the liquid drawn into the chambers A and C willbe discharged, the chamber A discharging through the passage 26 in the head 4 p'astthe check-valve 33, and the chamber 0 discharging through the passage 27 into the tube 6 and thence through said tube tothe discharge valve, the valve 29 in this action'being seated at the other end of its chamber, preventing liquid from being forced'from thechamber G into the chamberB. In this stroke the movem'ent of the piston 8 away from the head 5 causesthe liquid to be drawn into the chamber B through the annular space between thetubes 6 and 7 ,that is within the tube 7 ,by way of the passages 22 and 23 and past the valve 25. Upon the next retracting stroke liquid will be discharged from the chamber B, as air was discharged in the first stroke, that is past the check-valve 29,

through the passage 27 and tube 6;. The

Operation of the device is,therefore, that of the three chambers, two are filled-by twoindrawn streams of liquid in theretracting stroke of the piston-operating member, while one is emptied by discharge through the central tube; and in the opposite stroke,

the twowhich are first filled are emptied by two separate discharges, one through the central tube 6 and the other through the duct 26 in the heads, while one is filled by liquidfiowing in through a single course. The result is that both strokes are equally easy, the amount of work done in each of the two'strokes being substantially the same, although the quantity discharged is substantially twice as great at the iii-thrust stroke as at the retracting stroke. It will be noticed that the moutl1piece has a restricted discharge mouth 17, so that the liquid will be discharged in a slender jet, and thereby may be thrown to a very considerable distance; and in view of the fact above mentioned, that the double quantity is discharged at the inthrust stroke, it will follow that at the inthrust stroke, the work being more largely expended on the discharge than on the intake, the double quantity discharged through the discharge orifice by a stroke as rapid as and no more rapid than,the retracting stroke, will be projected much more forcibly and to a greater distance. And upon reflection it will be seen that this is not undesirable, since it is more natural to aim and attempt to reach a distant target by a thrust than by pull or retracting movement, and the operator will naturally rely upon his thrust stroke for reaching the more distant points or those which he wishes to reach with the greatestvforce.

Since the material which a pump of this character is designed to employ, namely, material for extinguishing fires, is liable to expansion and va orization, it is important that the discharge mouth should be at all times closed when the device is not in use, and this is desirable even if only to prevent leakage of liquid and for this purpose the stopper-valve 19 is provided for closing the discharge orifice 17* and is normally held retracted from that orifice by means of the spring 18. This valve is mounted upon two stems 1919 which obtain guidance in the head l, extending through the head so as to expose their inner ends in the path of the piston 8 which strikes them as it approaches the head A and forces the stopper-valve to its seat, closing the orifice as the piston reaches the inner end of its stroke.

For the purpose of locking the parts in inoperative position, that is with the two barrels fully telescoped together, the collar 12 is provided at opposite sides of the barrel member 2' with opposite turned hooks 12 and there is mounted on the side of the reservoir or in the angle between said reservoir and the barrel .1 where thelatter protrudes from the reservoir-iat the rear side, a flange which telescopes outside the barrel.

2. A portable hand pump comprising in combination a pump barrel, a reservoir projecting ofi transversely from the barrel, a piston member telescoping in the barrel, a suction pipe leading out from one end of the barrel into the reservoir and opening into the bottom part of the latter, the reservoir being penetrated by the barrel so that the reservoir cavity extends around the bar rel, the reservoir having an air vent aperture at the top and an inwardly-opening spring-seated valve at the aperture.

3. A double acting pump comprising a barrel having a discharge mouth and asuction intake, two heads longitudinally separated a fixed distance from each other in the barrel, a movable piston in the barrel between the heads, and a piston-operating member extending "from one end of the barrel past one of the heads to engage the piston, an intake tube and a discharge tube connecting the two heads, duct connections in one head from the tubes respectively to the chamber of the barrel between the piston and said head, the two tubes being connected respectively through the other head with the suction intake and the discharge mouth.

A. A construction such as defined in claim 3, the two tubes being concentric.

5. A double acting pump comprising a barrel having a dischar e mouth and a suction intake, two heads longitudinally separated a fixed distance from each other in the barrel, a movable piston in the barrel. between said two heads, atubular piston-operating member telescoping in the barrel and extending past one of said heads to engage the piston, said head operating as a piston in said tubular piston-operating member and having two passages for communication from one side of said head to the other side, an intake tube and a discharge tube connecting the two heads, one of said passages having communication with one o1 the tubes, and the other of said passages having communication with the other tube, and valves controlling said passages to determine whether said tubes communicate with one side or the other of the head having said passages, according to the direction of movement of the movable piston. V

6. A pump for manual operation comprising two telescoped barrels one of them having an intake connection and having at one end a discharge mouth-piece, the opposite' end of the other tube being closed; tWo longitudinally separated heads. fixed With respect to the first mentioned barrel, a piston fixed with respect to the other barrel and positioned between said tWo heads;

Copies of this patent may be obtained for and along which the piston reeiprocates between said heads, one of said-tubes leading to the discharge mouth-piece and the other to the intake connection; and valves controlling the passages for causing movement through said tubes in the directions for discharge and intake respectively.

- In testimony whereof, I have hereunto set my hand at Chicago, Illinois, this 24th day of July, 1918.

WALTER VAN GUILDER.

five cents each, by addressing the Commissioner-of Patents, Washington, D. C, 7

tubes Which rigidly connect the two heads

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