US1381115A - Pump - Google Patents

Description

A; GASSENHUBER, 1R.

PUMP.. APPLlcATmMv FILED oc. 19. 1920.

PatentedJune 14, 1921.,

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Algra Gasssnhubar rIr.

A. GASSENHUBER, 1R.

PUMP.

` APPLlCATlDN FILED 061119,1920. 1,381,115. PateutedJune 14, 1921.

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UNITE sra A'LOIS GASSENHUBER, JR., OF SOUTH MILWAUKEE, WISCONSIN;

PUMP.

Application filed October 19, 1920. Serial No; 417,895.'

T 0 all whom it may concern-f Be it known that I, ALors GASSENHUBER,

Jr., a citizen of the United States, and resident of South li/lilwaukec, in the county of Y Milwaukee and State of lWisconsin, have invented certain new and useful Improvements in Pumps; and I do hereby declare that the following is a full, clear, and exact description thereof.

My invention refers to improvements in compound air pumps and has for its plimary object to provide a pump of this general character, the cylinders of which can be telescoped, one within the other, when the device is not in use so as to provide compactness, and a further object is to simplify the valve construction, whereby the life of the valve is increased to the maximum and the tendencyy of such valves to leak is also overcome, due to the direct action of valves of the simple hat packing type.

It is also an object of the invention to provide a pump which can be manipulated with the least possible power to develop the ydesired compression of fluids, the compression being effected on both strokes of the piston.

l/Vith the above and other minor objects in view, the invention consists in certain peculiarities of constructionand combination of mechanical elements, as are hereinafter described and subsequently called for in the claims.

In the drawings,

Figure 1 represents a sectional elevation of a pump embodying the features of my invention, the cylinders of which are shown in their inactive nested position, whereby the length of the pump is materially shortened for convenience in carrying or storing, the section being indicated by line 1 1 of Fig. 5.

Fig. 2 is a detail sectional view of the upper head of the pump showing the inner compression cylinder adjusted to its working position. v

Fig. 3 is a cross section ofthe pump, the section being indicated by line 3 3 of Fig. 1.

Fig. 4 isv an outside elevation of the pump upon a reduced scale, showing parts broken away and in section, and also showing the compression cylinder distended and locked in its operative position.

Fig. 5 illustrates an elevation of the pump in its inactive position, similar to that shown the couplings or fittings maintained in in Fig. 1 and it particularly illustrates the compression ypiston leading to a source of storage or a receiver.

Referring by characters to the drawings, 1 represents a base head whichv closes the lower end of an intake cylinder 2, the upper end of the same being closed by head 3. rIhe upper head is centrally apertured for telescopic union with a compression cylluder 4, which cylinder is of comparatively much smaller 'area than the fluid intake cyl- 2. Both ends of the compression cylinder inder are opened and the upper end thereof 1s connectedV to a fluid distributing pipe 5 by suitable couplings 6, and mounted upon 6 is a gage 6 which directly 'communicates with the pipe 5 and thereby swivelly discloses theY pressure pipe 5 or a suitable portion of storage, such for example as a pneumatic tire. rlhe lower end of the compression cylinder is provided with a flange or guided collar 7, which collar is spaced from the walls of the cylinder 2'to permit fluidto freely pass therebetween. When the compression cylinder is withdrawn or distended with relation to the cylinder 2, for working purposes it is locked in such distended position by anysuitable means, as for eX- ample in this instance, a set screw 8 is used,

which set screw is in threaded union with Y the upper head 3 of the intake cylinder, and is adapted to impinge against the outer wall of the Vcylinder 4, as best shown in Fig. 2.

To prevent rotary movement of the'cylinder and to also give the same rigidity when it is distended, I provide a pin 9 which projects upwardly from the collar 7, .the same being arranged to enter a recess 9 in the upper head 3, as shown;` Iieciprocatively mounted in the compression cylinder-fis a hollow pistonrod 10, the lower end of which has secured thereto a centrally apertured disk 11, t'o whichrdisk is fitted a hat'packing 12 of flexible mate# rial and the same is secured to the 'disk by a ring 12. The hat packing extends downwardly so as to contract when thepiston rod is moved toward the upper head of the cylinder and to expand snugly of the walls thereof when the feed piston is moved downwardly. lThe upper end of the piston rod is similarly provided witha flange ring 13 carrying a hat packing gasket 14, the outer edges ef which extend upwardly and against the hollow piston rod.

In order to reciprocate the hollow piston 10, I provide a pair of tie rods 16, which rodsl are secured to the lower valve head by a threaded connection between their ends and the flange 11. The tie rods extend longitudinally of the cylinder 2 and are guided at their upper ends by means of apertures 17 which are formed in the head 3. Thus the tie rods extend through the headr and are connected to a reciprocative handle or cross head 18 by suitable nuts, which are in threaded union with the rods, it being `understood thatthe cross head 18 is aperis compressed to a predetermined degree, duel tured for reciprocative movement upon the compression cylinder. Thus the tie rods and all reciprocative parts are guided and firmly held against side strain. In order to further guidethe parts and prevent twist of the cylinder 4l, the vcollar 7 thereof is provided with peripheral notches which have frictional engagement with the tie rods, as best shown in Fig. 3.

From the foregoing description, it will be seen that when the apparatus is to be put into working position, the set screw 8, as in clamping engagement with the nested compression cylinder, is also distended, due to its open end coming into `engagement with the {iange 11 of the piston head mechanism. The compression cylinder will then assume the positionshowninhFig 2, and the set screw will be employed to lock the same in this position. A downward movement of the' piston mechanism will thus cause the air in the cylinder 2 to be forced through the hollow piston head into the compression cylinder 10, whereby this volume of air to the different areas of the two cylinders. Upon the upstroke of the cross head 18, the packing gasket12 will contract slightly and permit atmospheric air to lpass between the end walls of the cylinder`2, whereby said cylinder is filled and while this lling action is taking place, obviously the air or fiuid above the upper piston head associated with the piston 10 will beagain compressed to the l maximum volume, it being understood that the check valve mechanism 15 and 15 will prevent uits leakage back into the pump mechanism. l

ijIt will also be observed that the simple hat packing 14 in the upper end of the hollow piston simply serves as a piston packing only, and is held tightly against the walls of the compression cylinder by the air pressure thereabove. I-Ience, the only active parts :subject to leakage would be the hat packing gasket 12 and the check valve mechanism 15 and 15', and obviously these. two valve mechanisms being of such simple form, practically no-appreciable wear will come upon them. i

Thus it will bel seen that a simple and practical double-acting pump of the compound type is produced, wherein the ground structure is such as to provide the minimum of wear and thus overcome the serious obj ectV to devices of this character, bearing in mind that the telescopic feature is one of the important elements of the invention wherein compactness is obtained and the compound feature of the pump is thus produced in a simple manner.

I claim:

l. A compound pump comprising an air intake cylinder having upper and lower heads, a compression open ended cylinder in telescopic union with the intake cylinder, the same having one endextended through the cylinder head, means for locking the compression cylinder in its distended working position with relation to the intake cylinder, a hollow reciprocative `piston rod mounted in the compressiony cylinder, a valve head at its lower end engageable with the intake cylinder walls, a check val-ve control head carried at its upper end engagealle with the compression cylinder.V walls, longitudinally disposed tie rods carried by the lower piston rod head, the same extending through the. upper head of the intake cylinder vand actuating means connecting the rods,

2. A. compound pump comprising an intake cylinder having a lower closed head and 105 an upper head, an open ended compression cylinder in telescopic union with the intake cylinder, means for locking the compression cylinder to distended position with relation to the first cylinder, an open ended holl 110 low piston rodhaving anV upperhead in re-V ciprocative union with the compression cylinder and a lower valve head inrecipro cative union with the intake cylinder, a check valve mounted in the hollow piston 115 for preventing backfiow of` air from the compression cylinder, a tie rod extending from the lower head ofthe hollow piston and projecting through the upper head :of the intake cylinder and means secured to 120 the outer end ofjthe tie rod for actuating the hollow piston. Y A

' In testimonythat I'claimthe' foregoing I have hereuntov set Vmy handat South Milwaukee, in the county ofr Milwaukee and 125 State of Wisconsin.

Anors eassnnnunn JR. V

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