US1055004A

US1055004A - Air-pump.

Info

Publication number: US1055004A
Application number: US71252112A
Authority: US
Inventors: Frank H Walker
Original assignee: Individual
Current assignee: Individual
Priority date: 1912-07-31
Filing date: 1912-07-31
Publication date: 1913-03-04
Anticipated expiration: 1930-03-04

Description

m N A; A W v m i r m 1 .1 E

H AIB PUMP. APPLICATION FILED OOT. $0, 1 91 1 RENEWED JULY 31, 1912. 1,055,004.

15. H. WALKER.

f WITNESSL;

P. H. WALKER.

AIR PUMP. APPLICATION FILED 001'. so, 1911. nnnnwnn JULY 31, 1912.

1 ,O55,004. I Patented Mar. 4, 1913.

2 sums-sum 2.

WITNESSES IN VEN TOR .3 A llomexy UNITED STACMENT "OFFICE Frank E. WALKER, or mourn, nmrana.

sin-rm.

Specification of Letters Patent.

Patented Mar. 4, 1913.

Application filed October 80, 1911, Serial No. 657,468. Renewed July 81, 1912. Serial Ho. 712,521.

To all whom. it may concern Be it known that I, FRANK H. WALKER, a citizen of the United States, residing at Laporte, in the county of Laporte and State of Indiana, have invented certain new and useful Improvements in Air-Pumps, of

p which the following is a specification.

This invention relates to that class of air pumps which are operated by the explosion pressure of an internal-combustion engine by exposing the pump plunger to such pressure; and it is the ob ect of the invention to provide a novel and improved structure, the

pump cylinder bein formed directly in the cylinder head of t 0 engine, thereby dispensing with all outside connections and greatly simplifying the structure.

A further object of the invention is to pro 1 vide an improved lubricating system whereby the lubricate The invention also has. for its object to provide a novel construction-and arrangement of parts to be hereinafter described dpump plunger is automatically and claimed.

In order that the invention may be better understood, reference is had to the accompan g drawings in which- Fi igiire 1 is an end view of the cylinder of an internal combustion' engine showing the cylinder head equipped with the air pump to be hereinafter described. Figs. 2, 3 and 4 are sectional views on the lines 2-2, 33 and 4-4, respectively, of Fig. 1.' Figs. 5 and 6 are sectional vlews showing modified structures.

Referring specifically-to the drawing, 10 denotes a fragment of the cylinder of an in-.

terna'l-combustion'en'gine. The, engine, per 80, forms no part of the present invention,

- and a detaileddescriptiomor a further illusouter face, so that the inner end of said, bore opens into the-explosion chamber 14 of the engine cylinder. '--The outer end of the bore is enlargedin'diameterasindicated at 15 and forms a pm chamber which is closed-by ahead 16,- the pum chamber .15 is located a floating plunger-1 one side of which is a the implosion pressure in the chamber 14. The head 16 When the engine is running and compres sion takes place in the chamber 14, a res sure is placed on the plun r 17 where y it is forced outwardly until t e air in front of 1t 1s compressed to a'pressure equal to the compression pressure in the chamber 14.

When the explosion occurs in the chamber. 14, it exerts agreater force on the plunger,

thereby causin it to travel to the end of the chamber 15, w ereby the airin said chamber, in front. of the Inn r, is forced out through the valve 19 mto t e reservoir. Air

is forced into the reservoir as long as the sion pressure. on the intake stroke of the pressure therein remains below the exploengine piston 11, the suction draws the pump plunger inwardly a char of air drawn in behind the same th rough the valve 18. As compression and explosion occur, this air will be forced into the tank as "already described. Thus, on each explosion stroke, a small amount of air is forced into the reservoir,'to be used for starting the engine, inflating tires, operating air brakes, etc.

In order that the pump may work well, the chamber 15 must be large and unobstructed sothat the slightest change of pressure in the chamber 14 will make itself noticed on the pump plunger. If there is no pressure in the reservoir, the pump plunger will be forced to the limit of its outward stroke by the initial compression, and if there is a pressure in the reservoir, the compression forces .the' pump plunger the ater part of its stroke, whic om bem shot forward the full len h of its stroke y the explosion pressure, tereby preventing a knock on the head 16. The

prevents it inner end of the bore 13 which forms a port a leading from the chamber 14 to the chamber 15, must also be of lar area, as otherwise the explosion occurs be ore the compression pressure has scheme to act on the pump plunger.

the pump plunger 17,' there is formed a lubricant reservoir 20 in the cylinder head which ex 12, saidreservoin a tends transversely in: cyha f -'In order to provide for the lubrication of i f neath the pump chamber 15. Above the pump chamber, the wall thereof is formed with a duct 21 which opens at one end into a duct 22 in the head 16, and at its other end into the pump chamber, the last-mentioned end being provided with a needle valve 23 to control the flow of lubricant into the pump chamber. The duct 22 extends ver-. tically through the head 16 between the valves 18 and 19, and at its lower end it is in communication with a duct 24 in the cylinder head 12 which latter duct leads into the bottom of the reservoir 20. The upper end of the duct 22 is of enlarged diameter which forms a valve seat in said duct, said valve seat being engageable by a ball valve 25. The reservoir is provided with a drain opening which is closed by a screw plug 26, and to one end of the reservoir is connected a filling tube 27.

The lubricator operates as follows: The plunger 17 passes the outlet end of the duct 21 at the end of each stroke, so that a slight suction is produced there ateach suction stroke. This causes the lubricant to be drawn up from the reservoir 20, and to be discharged on the side of the plunger to lubricate the same. The valve 25 acts as a check to prevent the lubricant being forced back during the compression and explosion.

Referring to Fig. 5 of the drawing, there is shown a fragment of the cylinder 28 of an internal-combustion engine, the head 29 of which'is formed with a pump chamber 30 opening at one end through a contracted portion 31 into the explosion chamber of the engine. Over the other end of the pump chamber is mounted a cylinder 32 which forms a' second pump chamber and is in communication with the chamber 30. The outer end of the cylinder 32 is closed by a head 33 having air inlet'and outlet valves 34.- and 35, respectively. In the chamber 30 works a plunger 36 .which'is connected by a stem 37 to a plunger 38 working in the cylinder 32, the diameter of the latter being less than that of the chamber 3Q. In the wall of the cylinder 32 is an air inlet port .ner as on the valve 40 closes,

39 which opens into the space between the

plungers

36 and 38, and has a valve 40 which opens to admit air and closes to prevent the escape thereof. The reduced rtion 31 of V a shoulfizr4l which limits the inward stroke of the plunger 36. In operation, the compression and explo: sion act on the plunger 36 in the same manplunger 17 already dwcribed, whereby the plunger 38 is actuated to compress the air in the cylinder 32 in an obvious m'anner. On the outward stroke, the

plunger 36 is therefore compressed, so that it will tend to start the plunger on its return stroke; This is desirable in high speed work as the suction of engine need not and the air ahead of th removing the cylinder 32, said valve can be,

removed through the chamber 30, the crosssectional area of the latter being such that the valve may readily pass therethrough.

' I claim:

1. The combination of an internal-combustion engine having its cylinder head formed with a pump chamber and a port leading from one end of said chamber to the explosion chamber ofthe engine, a closure for the other end of the pump chamber, inlet and outlet valves carried by said closure, and a plunger in the pump chamber.

2.- The combination of an internal-combustion engine having a pump chamber integral with the cylinder head of the engine and opening into the explosion chamber thereo inlet and outlets for the pump chamber, and a pump chamber.

3. The combination of an internal-combustion engineihaving a pump chamber. integral with the "cylinder head of the engine and o ening into the explosion chamber thereo and said cylinder head having a lubricant reservoir and a duct leading from said reservoir into the pump chamber, inlet and outlets for the pump chamber, and a plunger worln'ng in the pump chamber and uncovering the outlet end of the aforesaid duct at the ends of its stroke.

.4. The combination of an internal-combustion engine having its cylinder head formed with a lubricant reservoir and a pump chamber, and a port leading from one end of said chamberto the explosion chamber of the engine, and said cylinder head plunger working in the havinga duct opening into the pump chamber, a head closing the pump chamber, said head having a duct which communicates at one of its ends with the lubricant reservoir, and at its other end with the first-mentioned duct, inlet and outlet valves carried by the head of the pump chamber, and a plunger working in the pump chamber and uncovering the outlet end of the first-mentioned duct at the ends of its stroke.

5. The combination of an internal-combustion engine, apumphaving" its plunger exposed on one side totheexplosmn and compression of the engine, and an air cushion on the other side of the plunger to produce the return stroke thereof.

v 6. The combination of an internal-combustion engine, a pump chamber communi-' eating at one'of its ends with I the explosion chamber of the engine,

a cylinder connected to the other end of the pump chamber, inlet and outlet valves connected .to the cylinder,

connected plunger-s working in the pump chamber and the cylinder, and an air cushion v between the plungers.

v 7. The combination of aninternahcombustion engine, a pum chamber communicati v at one of its on s with the explosion cham er of the engine, a cylinder connected to the other end of the ump chamber, the diameter of said cylind er being less than that of'the pump chamber, inlet and outlet valves connected to the cylinder, connected plungers workin in the pump chamber and the cylinder, an a valve for admitting air into the space between the plungers.

. V a 8. The combination of an internal-combnstion engine having its cylinder head formed with a pump chamber which communicates with the explosion chamber of the engine, a valve, said pump chamber being in line with the valve, and having an area which permits said valve-$0 pass therethrough, and a removable closure for the pump chamber,

In testlmonywhereof I aflix my signature MATE G. LINE, Len L. Gemini.