US587979A - Pump for pneumatic tires - Google Patents

Description

(No Model.)

H LBINEWEBER PUMP P0P PNPUMATIG TIPPS, anc.

No. 587,979. Patented Aug. 10,1897.

Elll

aen-Z321 UNITED STATES' HERMAN ALEINFVEBER,

PATENT OFFICE.

OF CHICAGO, ILLINOIS.

PUMP FOR PNEUMATIC TIRES, 86C.

SPECIFICATION forming part of Letters Patent No. 587,979, dated August 10, 1897.

Application iiled January 27, 1897i Serial No. 620,912. (No model.)

To all when@ t may concern:

Be it known that l, HERMAN LEINEWEBER, a citizen of the United States, residing at Chicago, in the county of Cook and State of Illinois,have invented a new and useful Improvement in Pumps for Pneumatic Tires, rbc., of which the following is a specification.

My invention relates to an improvement in pumps of the nature useful in charging pneumatic tires for bicycles with the requisite amount of air under pressure. Pumps of this class are divided usuallyinto two kindsviz. ,hand-pumps and foot-pumps. It is found that by using a foot-pump, by which is to be understood a pump which is held in place by the foot and is operated by hand, the requisite pumping of the tire is effected with less labor and with much less physical inconvenience. On the other hand, the use of the hand-pump necessitates the stoopin g of the operator while pumping the tire, and, as the barrel of the pump must be held in one hand while the piston is operated with the other, not only is the operation of pumping slow, even when the pump be the so-called double-acting style, but the barrel becomes heated very much to the discomfort of the user.

The object of my invention is to produce a pump which may be of the size of the ordinary hand-pump-that is to say, of a size adapting it to be placed in the tool-bag commonly carried with the bicycle, but which when in use shall be adapted to be held to the ground by the foot and operatedfor the rapid and effectual pumping of the tire without either touching the pump with the hand or stooping over into, an uncomfortable attitude while operating it.

To these ends my invention consists, primarily, in a pump comprising a barrel and piston operated relative to each other by a lifting action exerted through a flexible or folding connection with the hand and having a hinged pedal extension whereby the stationary member is held to the ground.

My invention consists, further, in the general and speoiiic details of construction and combination of parts, all as hereinafter more fully set forth.

In the drawings, Figure l is a central longitudinal sectional view of a pump embodying my preferred form. Fig. 2 is a plan view of the foot-rest, taken on the line 2 of Fig. l. Fig. 3 is a central vertical section taken at the lower or inner end of the piston-tube; Fig. 4, a plan view of the expanding ring which effects the lock between the members of the piston in operation. Fig. 5 is a View in elevation taken at the upper end of the solid member of the piston-rod, and Fig. 6 is a transverse sectional view on the line 6 of Fig. 5 and viewed in the direction of the arrow.

A represents the ordinary pump-barrel, closed at its upper end with the centrally-perforated cap t, which may, if desired, have the air-admitting perforations s, although for 0rdinary purposes it is found entirely sufficient to form enlargements of the central perforation through which the tubular piston-rod passes as the means for admitting air to the pump-barrel. The other end of the barrel A is closed bythe centrally-perforated cap fr, in which l prefer to place the leather packing r andthe felt Washer or packing r2.

B represents the tubularpiston-rod, the upper end of which is provided with the usual connection p for attaching the flexible tube leading to the nipple in the tire -valve'and at its other end carrying the piston C, to which is secured the cup-shaped washer C, preferably made of leather. Adjacent to the piston C the tube B has the annular enlargement 0, and within the tube at the point of the enlargement o is an annular recess D. The tube B forms in use one member of the piston connection, the other member being found in the rod E, which passes through and fits snugly in the central aperture in the cap r, and carries at its upper end the elongated head E', having the longitudinal grooves, one or more in number, n, and at or near a centra-l point the annular groove n'. At its upper end the head E may, if desired, carry the cup-shaped washer E2, as shown in Figs. l and 5. A cap F, internally screw-threaded and centrally perforated, iits upon the lower end of the piston-tube B, and the perforation in this cap receives the rod E. The purpose of the cap is to prevent separation of the members E and B, constituting the piston-rod.

It will be understood that the central perforation in the cap F is sufficiently large to permit the air to pass from the body of the barrel to the bore of the tube B through the IOO lateral passages n. An expanding ring G, preferably of sprin g metal, embraces thehead E in the groove n', and when in normal position it presents a greater diameter' than the head E'. Its function is to serve as a lock between the head E' and the tube E when the annular grooves D and n coincide, or,in other words, when the parts are in the position illustrated in Fig. l.

The opposite or lower end of the rod E, after it. passes through the cap r, hasv a screwthreaded connection with the brace H, which receives and carries thebent arm I, constituting the pedal extension. It will be seen that the bent arm I may by reason of this connection be turned downward to the position shown in Fig. 1 where the foot may rest upon it to hold the pump to the ground, or it may be turned upward to lie snugly against the side of the barrel A. The brace I-I may, if desired, have thehook projections Il to receive the lower end of an elastic strap K, one or more in number, the opposite ends of which straps are connected with hooks held to the barrel A.

Properly secured to the barrelA, as through the medium of lugs L, is a cord, chain, rod, or other rigid or flexible medium M, the purpose of which is to afford a means for lifting the pump-barrel by hand and without stooping while the pedal extension I is held down by the foot. I prefer to use a cord or chain for this purpose, as it may be readily wrapped about the pum p-barrel when the device is collapsed, but I do not limit myself to this agency, merely suggesting that if a rod is substituted therefor it is preferable that it shall be collapsible, either by disjointing it or by folding it upon itself.

I deem it unnecessary to illustrate more than the cord, and in claiming this feature I shall use the term cord with the understanding that it is intended to include any such substitute, as chain, rod, or the like, which the preference of the mechanic may lead him to select.

The operation is as follows: The pump being in acollapsed condition-that is to say, all the `parts being forced together, so that the pedal extension I Vis folded up parallelwith the barrel and the `piston-tube B forced in-V ward, so that the piston C will be near to or at the cap r-to put the pump into operative condition the pedal extension I is turned to the position indicated in Fig. l and the piston-tube B drawn outward until the annular grooves D and n in the tube B and head E respectively coincide, whereupon the split ring G expanding serves to lock the members E and B in their relation to each other illustrated in Fig. I. Lifting'the pump-barrel A by power appliedV through the cord M will cause the air in the barrel'to be forced through the tube B to the nipple. The return of air from the tube -B to the barrel-A is'prevented by the vcup-shaped packing E2. The barrel having been lifted to its highest point, its return to its lowermost position is effected in part by the springs K and in part bythe expansion of the air compressed in the tube B. I may state that the expansion of the air in the tube B is ordinarily sufficient to cause the pum p-barrel to return to the position indicated in Fig. l without employing the springs K, which may therefore be dispensed with. On the return of the barrel A t-o its original position the'air admitted through the apertures s or such other apertures as may be provided for the purpose passes aroundthe-packing'O and into the barrel below Vthe piston. The pumping operation may be repeated in this manner until the tire is inflated. upon to collapse the pump into its desired small compass a sharp blow-directed upon the end of the tube B will cause the members E and B to telescope one within the other, the split ring G readily contracting to permit this to be done under suchsharp impact.

I do not limit myself to any'particular'connection between the members Eand B, although that here shownis believed'to be the one most desirable. Means may be provided by which a so-called bayonet-joint connection between'the members vmay be effected, this mechanical expedient being so well known as to require no specific description and not further described herein, because it, 'withits preferred details, will form thelsubject of a separate applicationi'for Letters Patent about to be filed kIt'ismentionedV merely in illustration of the fact that tothe -skilled mechanic modifications, more or less operative, of the specific joint may be'contrived.

lVhat I claim as new, and desire to secure by Letters Patent, is-

1. A pump for pneumatic tires and the'like,

Therecomprising a barrel and a-piston, said piston comprising two telescopin g members adapted to be interlocked at need, one of said `members constituting a tubefor the passage of air compressed in vthe pump to the nipple, substantially as described.

2. A pu mp for pneumatic tires and'thelik'e, comprising a barrel and means for lifting the same, a piston and apedal extension for holding the same in fixedrposition while the barrel is being lifted, and a tube having a fixed connection with the piston and leading from the barrel, substantially as described.

3. A pump for pneumatic tiresand the like, ,comprisin g in combination a barrel and means for operating the vsame with relation to the IIO contained piston, a`pist`on within the barrel and rod at will and their ready unlocking, and a pedal extension, all said parts being constructed substantially as described.

5. A pump for pneumatic tires comprising a barrel A, piston C, tube B, rodE and a locking mechanism for the rod and tube, whereby they may be held together at will or unlocked and collapsed one upon the other, and a pedal extension connected with the rod E, substantially as described.

6. In a pump for pneumatic tires, of the nature described, the combination with the barrel A and piston C, of a tube B having the annular recess D and the rod E having the head E provided with the annular recess 'n' and the ring G, substantially as and for the purpose described.

7. In a pump of the character described, the combination with the pump-barrel A and the piston therein and with the piston-tube B and rod E and means for interlocking the same at will, of the packing E2 in the tube B, as and for the purpose described.

S. The combination With a pump and its piston, of a pedal extension, whereby the pump may be held to the ground, a handle and a flexible connection between the handle and the movable member of the pump, Whereby the pump when not in use may be c011- ined Within a space permitting its inclosure in the tool-bag of a bicycle, as set forth.

9. The combination with the barrel A, the piston therein and means for holding the piston in iiXed relation With the ground vand with a cord or the like for lifting the barrel to compress air therein, of the springs K for returning the barrel to its normal position, substantially as described.

HERMAN LEINEVVEBER.

In presence of J. H. LEE, R. T. SPENCER.

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