USRE13687E - Power tire-pump - Google Patents

Description

11.1). WATERHOU'SB.

POWER TIRE PUMP.

APPLIOATIOB FILED APR. 5, 1911.

. maimed Feb.1o,'1914.

26 l lui/enfant',

2 Harald- Werhaase miuesfseis:

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UNITEDI STATES PAENT OFFICE.

H AROLD D. WATERHOUSE, OF WOLLASTON, MASSACHUSETTS.

'POWER TIRE-PUMP.

Specification of Reissued Letters Patent. Reissued Feb 1()9 1914.

'Original No. 977,851, dated November 29. 1910. Serial No. 569.220. Application forreissne led April 5,

' 1911. Serial No.622,721.

To all u'lmm itmay fonce/n Be it known that- I, HAROLD D. WATER- Hot'sn.' a citizen of the 'United States. residing at 'Wollaston in the county of Xorfolk and State of Massachusetts. have invented certain new and useful Improvements 1n Power Tire-Pumps: and I do hereby declare the following to be a full. clear. and exact Adescription of the invention. will enable others skilled in the art to which it appertai'ns to make and use the same.

This invention relates to power tire pumps and has for its object the production of a pump which will utilize the gases from an automobile motor to pump up the tires of the machine. prevent said gasesV from entering the tire. In other words. this invention provides a means. for readily. cheaply and quickly inilatingtires with fresh air at all times. and at the same time will' prevent grease and other deleterious substances found in motor cvlincler gases from entering the tire.

T o these ends. the invention consists in the novel details of construction and combinations of arts more fully hereinafter disclosed an particularly claims.'

Referring to the accompanying drawings forming a part of this spec'ication and in which like numerals refer to like parts in all the views, Figure 1 is a diagrammatic view. partly broken away. showing the application of my pump to the wheel of an automobile: and, Flg. 2. is an enlarged sectional View of the pump detached from the motor cylinder.

1 indicates any suitable cylinder. preferpointed out in the ably provided with the radiating ridges or 13. in order that projections `2. and with lugs or other means 3, for securing the cylinder to the dashboard 4. or other portion of the automobile 5. This cylinder is provided 'with a .port 6. adapted to be connected as by the pipe T to the cylinder S. of the engine S). and this pipe 7 is preferably provided with a valve 10. as indicated. I

The cylinder 1. carriesl vas shown, devoid of piston rods. and. therefore. I term the same a oating piston. and .the vbore 1'2 of the cylinder extends somewhat beyond the porty (3 as indicated at the piston may have a cushioned stroke.` By extending the bore 1:2, however. the piston is liable to be sucked up beyond the port G. and to close the same.

such as and will at the same timeA /port 22 is the pipe :26, adapted to convey a pistonll. which. i

In order to obviate these disadvantages, I provide the by-pass 14 which enters the port 6. outside of the cylinder. as show-n, and which enters the cylinder .at its extreme end. as indicated at 15. The by-pass 14 is pro- 'ided with a valve 16 preferably of the ball type which naybe conveniently controlled as by the spring 1T. A convenient way of sup-porting the valve is by the cage 18. The other end of the cylinder 1 provided with the valve :20. preferably of the form of a check valve. which controls the vport 21 which admits fresh air into the cylinder on the side of the piston opposite to that on which the engine gases exhaust. A port 2'2 is also, located ata distance from the air in-l let end of the cylinder. in order to provide a cushion for the piston. and this port is preferably provided with a valve Q3 of the ball type which may be conveniently controlled by a spring Qi. also carried by a cage 25 similar to the cage 1S. Connected with the the air to the tire QT. and to beconnected and disconnected. ,therefrom as by the usual meansQS.

The operation of my invention is as follows:-\Yhcn it is desired to iniate the tire. the pipe 2G is connected by the means 28 to the tire 2T. and the valve 10 is opened. The engine being started. the combustion gases from the saine enter the port (l and force the fioating piston 11 toward the valve Q0. This. in turn. causes any air which may be in the cylinder piston to be forced out of the port 22. and through the pipe 26 into the tire. Upon the occurrence of the intakestroke of the engine. a. vacuum course formed in the cylinder 1. and the pressure of the atmospherel will cause the valve 20 to unseat. while the piston 11 will be thrown to that end of the cylinder at which the port 6 is located. Upon the next compression and expansion strokes of the engine taking place. the said piston l1 will be again forced to the opposite end of the cylinder. thereby causing the valve 20 t-o seat. the va-lve .23 to unseat. and an additional supply of air to be forced into the tire.

Should the suction to which the floating piston 11 subjected cause the same to pass beyond the port 6 and thereby close the latter. then upon the next compressive stroke. the gases entering the by-pass 14,will cause the valve 1G to unseat. and said gases enteron the opposite side of thev connection With pensively pump up t-he tire from ing the outlet l5, will force the piston 11d with the tire to be inflated, substantially as past the port o, thereby uncovering the same, descrlbed.

and the other portions of. the compressed L 4f. In a power tire pump,fthe combination gases will complete the stroke as above. of a cylinder mebns to secure the same to an Itivill thus be seen that by the simple automobile, means to radiate the heat gcnexpedient of employing a oating piston in erated in saidA cylinder, a floating piston in the construct-ion above disg said c vlinder, a port to admit the combusclosed,`I ain enabled at all times to prevent i tion gases of an engine to one side of said any grease or other deleterious substances piston and adapted to be closed by said pisentering the tire, and yet at the same time I ton; a valved by-pass connected to said port, -aln enabled readily to eliciently and-'ineX- and entering said cylinder; connections bethe motor, tween said cylinder and said engine, and at will. In other Words, I prevent the gases l valved connections on the other side of said and air from mixing, While at the same time, l piston between said cylinder and the tire to I utilize the air compressed by said gases to be iniated, substantially as described. inflate the tire. 5. In a power tire p-ump', the combination It is obvious that those skilled in the art. of a cylinder, a ioating piston in said cylinmayyary the details of construction and arder, a port iocated-aivay from the extreme rangement of parts Without departing from endv of said cylinder and adapted to admit the spirit of my invention, and therefore, gases from the combustion chamber of` an I do not wish to be limited to said features engine into said cylinder on one side of said except as may be required by the claims. l piston, a valved by-pass connecting said port It is also obvious that the use of my inand the extreme end of said cylinder adapted vention is not conined to tires, for it may to deliver combustion gases on the same side be used on motor boats and wherever it is of said piston as said port, a check valve in l l 4desiredto provide a supply of fresh air the extreme other end of said cylinder under pressure. adapted to deliver air on the otherside of What I claim is v l said piston, and a valved port on said last l. In apower-tire pump, the combination mentioned side of of a pump cylinder, a ioating piston theredeliver said air to the tire to be inflated, subin, a port at one end of said cylinder stantially as described. adapted to be connected to the chamber of i 6. In a ower tire plump, the combination a motor cylinder, a valved by-pass commu-l of a cylinf er; a' floating piston therein; an nicating with said port and said cylinder, a inlet port. entering'the side of said cylinder port at the other end of said pump cylinder 'to form a cushioning space for said piston said piston adapted' to adapted to be connected to the tire to beV inbetween said port and the extreme end of iated, and a valved port adapted to admit said cylinder; a valved by-pass between said air into said pump cylinder, substantially as port and said cylinder end; a valved port described. for air at the extreme other end of said cyl- 2. In a power tire pump, the combination of a cylinder, a kport at one end adapted to communicate with the chamber of an engine cylinder and to admit the gases into said pump cylinder, a port at the other end of said pump cylinder adapted to be connected with a tire to be infiated, a by-pass leading from said first mentioned port to said cyl,l inder, a valve adapted to admit air into said cyiindexga valve adapted to admit air into said pump cylinder, and a iioating piston in s'aid pump cylinder adapted to prevent said inder; and an exit port for air entering the side of said cylinder leaving a cushioning space for said piston between said air inlet port and said air'exit port, substantially as described.

7. In an automobile the combination of wheel mounted, elastic fluid inflated tires; an internal combustion propelling motor; a pump actuating cylinder; pressure communication means to conduct elastic Huid pressure from said motorv to vsaid cylinder; a reciprocating piston air and gases from mixing, sustantially as tuated for a substantial rtion'of its stroke described. A in both directions solelyify variance of elas- 3.' In a ower tire pump, the combination tic fluid pressure on its o vposite sides proof a cylin er, a port at one end of said cylduced by operation of sai motor; air cominder adapted to admit the combustion gases from'an engine into said cylinder, a piston adapted to be subjected to the pressure of said gases on one face during the compressive stroke of the engine, and to'close said port during the suction stroke thereof, a bypass connected to said port and adapted to deliver said gases to said piston, 'a' valve adapted to admit air to the other face of said piston and a valved port adapted to connect pression means operable by 'reciprocation of said piston; an air inlet port entirely independent of said motor to admit pure air to said compression means; an air outlet port and means t-o conduct air under pressure from said outlet port to said tires; whereby operation of said motor may inflate said tires with pure air.

8. Inl an auto-mobile the combination of wheel mounted, elastic Huid inia-ted tires;

said cylinder Vac- 4 1 0 piston; an air inlet port entirely independent of said motor to admit air to said coml .pression means; an air outlet port; means to conduct air under pressure from said outlet rt to sald tires; whereby operation of sai l motor may in ate said tires with u;A

pure air.

In testimony whereof, I have signed my name to this specieation in the presence of two subscribing witnesses.

.HARQLD D WA-TERHOUSE. Witnsesz`- i i Pnas'mx UPHAM, CECILIA Rooms'.

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