US1291504A - Air-pump. - Google Patents

Description

G. E. HAZARD.

AIR PUMP.

I APPLICATION FILED APR. 8, |9l8- i-,291,504=, Patented Ja11.14,1919.

. 2 SHEETS-SHEET l- G. E. HAZARD.

AIR PUMP.

APPLICAIION FILED APR.8i 1918.

, 1,291,504, Patented Jan. 14, 1919.

2 s'HEETs-sHEET 2.

. ATE

OFFICE.

EDGAR HAZARD. OF ROCHESTER, NEW YORK. ASSIGNOR TO KELLOGG MANU- FACTURING 00., OF ROCHESTER, NEW YORK.

AIR-PUMP.

Application filed April 8, 1918.

El? all who/11. it may unicorn Be it known that I. GEORGE F. Hamlin, a ci'izen of the l nited States. residing at iilochester. in the county of Monroe and State of New York. have invented certain new and useful lmproven'ients in Air- Tnmps, of which the following is a specification reference being had therein to the accon'ipanying drawing.

'il 'liisi invention relates to improvements in air pumps. and is particularly intended for two classes of service :(o) for use in sup- Plj/lllg' air to large sized pneumatic tires on motor trncks. and (b) for garage use in supplying heavy air pressure to storage tanks for inflating automobile tires.

The invention is also adapted to be used wherever a small high duty air compressor is desired, and it may also used for supplying air to an air-whistle on motor boats, and tor supplying air pressure to air motor starting devices.

ii'here air pumps are used for inflating tires. it is necessary to prevent oil passing to the tires with the compressed air to avoid injury to the tires. and the primary object of my invention is to provide an improved oiling system so constructed and arranged that all of the movable parts of the pump are eiiicicntly lubricated while at the same limo compri sod air is delivered free trout any trace of oil.

Anotherobject of the present invention is to construct the cylinder head with a charm ber directly at the outlet side of the outlet valve to permit a free escape of the compressed air around and after it passes the valve.

i Another object of the invention is to provide an improved spiral form of valve sprin whereby a very sensitive spring is provided; so that it can be compressed without the coils interfering with the action of the spring. and whereby a larger gage of spring wire can be used than with a straight iring; the larger wire .is not so much a l i by the heat of the pump as a smaller wire in a straight spring would be.

Another object ofmy present invention "o provide an improved manner of connecting the outlet manifold air-tight to the heads of the cylinders.

in the accompanying drawingl igure l is a vertical central sectional new of a pumpfembodymg my unprove- Specification of Letters Patent.

Patented Jan. 14, 1919.

Serial No. 227,282.

merits. the compression end of one of the cylinders and the connecting end of its manifold being shown in side elevation.

Fig. is an end elevation of my improved pump. partly in vertical section.

My improved pump is of the multiple cylinder type and as here shown comprises two cylinders 1. removably mounted side by sidion a crank shaft case 2. The cylinders l are provided with flanges 3 through which screw-bolts 4 pass into the crank shaft case 2. as shown. thus remo'vably connecting the cylinders and the crank shaft case.

The type of pump here shown takes air through a suitable air-passage 5 into the crank shaft chamber (3, and this air passes into the open lower ends of the cylinders 1 and through an outlet opening 7, in each piston The opening 7 is provided with a valve 9. the stem of which is guided and supported by a suitable valve guide 10, mounted in the head of the piston 8. 1 cone-shaped spiral spring 11 has its large end abutting against the guide 10,and its lower end held by a scrmv-nut 12 on the end of the valve stem 13. The compressed air from the compression chamber 14 passes through a valved opening 15. formed in the head of the cylinder. and this opening is controlled by a valve ll). The stem 17 of this valve is supported and guided by a suitable guide ring 18. and a conical spiral spring 13) has its large end abutting against this guide 18 and its small end engaging the head of the valve Ll).

A suitable crank shaft 20 has its ends 21 journaled in cml bearings 22. the ends 23 of the crank case.

Pistons 7 are connected with the crankshaft by the connecting rods 24. which are provided with suitable bearings 25, While the opposite ends of the. connecting rods are connected with the pistons by means of the usual wrist-pin 2(3. Ashore shown the wristpin Zliis locked in position in the piston by a'suitable screw 27.

As shown, the compression ends of the cylinders are connected by a manifold 28.

"My improved manner of connecting the manifold consists in providing a brass wedge-shaped packing 30, which is placed between the inner side of the screw threaded flange 31 of the cylinder .head, and the end 32 of the manifold. This wedge-shared packing is forced to tight position by supported in provide an absoidieiy air-eight comieeeioil' between the manifold and the cylinder head Attention is directed to the construct on of iiie cylinder head 35, in that it is provided with a, chamber 36'iooated outside ofond surrounding the valve 16. This coir siriiction permits a free unimpeded pessegc of air from the compression chamber 14: around and beyond the valve 16 on its way who the manifold. 7

It will be observed that the'cyiindei'e are "grovided with vciiicoliy arranged cooling ns 37, which are found to be more efficient than transversely arranged cooling fins, in that the air has s free upward passage past the fins, which is not the case when they are arranged imnsveise the cylinders and the cyiinders supported in e vertical position. I find this arrangement of the cooling fins to be very eificient. However, this forms no part of my present invention and. when desirable the cylinders may be Wider cooled bye, suitobieweli known woterqeoiiet (not shown}.

A. suitable hood 38 is located outside of the air-passage 5, and extends down a, considerable distance, as shown in Fig; m and the air before it reaches the crank cese chamber 6 passes under the lower end of this hood. or apron 38 and up'wzii'dbetween it mod the end of flie'crunk case to the air 5" By this arrangement spisisoi'ng' mud and dirt is prevented fiom entering the pump Wicii iiio air that is passing therethrodgii.

Turning now to my iii'ip'foved oiiiog, systom, which is the 'zrimei'y impioveiiieni here disclosed, I provide onioii siippiy chamber or sump 40, which is below the Ciffiltii shaft chamber 6. Oil is supplied to e ember 20, through d suitobie oil fiiier 4:1, which hes its opening provided with e desbeciieiile plug- 42.

For the urpose of iubricoizing she pistons and. cyiiners, I provide 2i feii oii pad 48, which is located between the adjacent lower ends of the cylinders. This feiii pad is ermaily held upward by a. suiiioble fiat spring 44, and an oil suppiy Wick i5 extends fi'oin the pad 18 down into the oii chember i0, as show n in Fig. 2. Oi! is suppiied by capillary action from the chamber ii), through the sup plywiok &5 to the pad 4-3, and this Wick ex" tends down both. sides of the creek case through channels 46 to the chamber 40, The

- felt spring, 4% holds the pod 4:3 up so that. it

is touched by the lower and of the pisfixon each time it moves down and is slightly depressed ehercby. In iiiis Way the piston takes up sufiicicntoii to furnish lubrication Bound Book oiliess Eteei'iiig seem-oi ifiiie some iime preveiiis any excess iiiioi'ioo eion reaching the compression choi'z oer i i and being carried eiiei'eirom with the compressed aminto one idlfi be .iliiiaifliiv- The main bearings 21 are iiioricoized o" brioating Wicks 47, which pass through c ncis &8 into ihe'oimmber 4rd, and the upper ends or" the Wicks are held in oo-iioci Wiitii iii e main openings by suiiiebie rings 49*, 2 which are located between she ewopiire iiieio bearings 22. By this emmieemeet wi i is siweys held, in contact Wiilil die iiio iii 1-,; and eiiicieni lubrication of these hearings insured.

The connecting rod bee 's we hired embed by a very siighi; emou oi}; Wi'ii forced out of the pad 43 heiow tile 1' when the pump is in operation. ooiiccts at the bottom 05; the or just about enough 30 iobiicsie mo through a felt Wick 5% o W1, nesting rod. Each time co is in its loweefl ,osiiioze, ohii iitiieoii Whio is convey wifih which ii: is in oonfzeci The cylinders, as is singly, but they may Le c 21150, as here shown, the cyii made sepaiieee from the screwed therein though it "that on cylinder heads be made port. I

As here shown, the pump is c we cyiinde s, imi; I desire so stood. time my improvemenes ere idem be used with o iairgei number of cy iii, and even with E, singie cylinder v The bearings used. iii. this pump Without damage. ,.,4

Viith on oiiing system, iiifiift: show: oidy neoessei-y to poem oii tiiio 41 into the pump, eii bee, 6 m with the piston and cyiiiiders will be oie'nely lubricated, amid the Wiii d iiii free from. any emce of oii i 01 inf tires.

A self lubricating hearing 51 at she upper end of oheoonnecting rod 2 4- ii is also provided a sins-1i opening in if of the said bearing through which .22 oil 12* may pass to "the bearing, shonid on coileci/ in the under side of the pision or on c ne and of the valve stem As this pump is particularly imbeiioied for use under the cai- Where it is subject 53o mod, dust, Water and all kinds of almee oi? ibis no time, 3 suitable dose protecting foil 53 em:- rounds the exposed end of the crook s} and, the hood 38 protects the air: iiiiet o ing 5 in'der, and 21v Wick extending from the Crank shaft intethe eil Well, the aris combined for the purpose described.

10. in an air pump, the combination of e crank case, a cylinder magnified hereon z, lubrieaeing pad at the lower end of the cyliim der, a crank shaft jouinaled in the crank ease, the crank case having an oil chamber below the emnk shaft, and a wick channel extending to the iubriceing pad, a Wick passing threugh the channel :Emm *ahe pad into the oil chzunber, and a Wick extending from the crank shaft into he Oii ChZLXfibGI, whereby the piston and crank shaft are supplied with lubrication from the oil supply chamber.

11. In an air pmnp, the combinatimi e1? wank case, a eyiifler mmmted fliz-az'c-rei"i & piston. Within the e3 Hider, crank ska-gift opemtively cenneeted Wifl) the pisten, an oil receiving member a5 the lower end 9:? H19, cylinder, an eii supply Wei} on crank ease, e wick ehennei emencling mam the oil Well 0 the nil receiving mamer' and e Wick passing tiireugh the ehamiel and connecting the oil Well ifih the 0%) receiving men'ibei fer the purpose deseribedi.

in testimeny Whereei LE heweume affix my sigi'mtm'e in the presence two witnesses.

iEURGE EEB G-AR HAZARD Wiinessee J. W, DOYLE, RALPH Q. l'iim'NEe

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