US2092920A

US2092920A - Air pump

Info

Publication number: US2092920A
Application number: US62684A
Authority: US
Inventors: Orlando B Johnson
Original assignee: Individual
Current assignee: Individual
Priority date: 1936-02-06
Filing date: 1936-02-06
Publication date: 1937-09-14
Anticipated expiration: 1954-09-14

Description

Sept. 14,1937. 0. B. JOHNSON 2,092,920

AIR PUMP Filed Feb. 6, 1936 3 Shets-Sheec l Sept. 14, 1937. o B. JOHNSON 2,092,920

' AIR PUMP Filed Feb. 6, 1936 3 Sheets-Sheet 2 O l m.

Sept. 14, 1937. o. B. JOHNSON 2,092,920

AIR PUMP Filed Feb. 6, 1956 :5 SheetsSheet 3 Site: 44 g Patented Sept. 14, 1937 UNITED STATES PATENT OFFICE Claims.

This invention relates to compressors, an important object of the invention being to provide a compressor so constructed that substantially large inlet valves may be used, thereby providing an especially desirable and efficient valve structure for use with high speed compressors, eliminating the use of small valves which necessarily reduce the velocity of the air being drawn into the compressor. Another object of the invention is to provide a structure wherein the compressed air will have a more direct and unobstructed outlet thereby reducing the power necessary for the operation of the device, to a minimum.

A further object .of the invention is to provide a compressor constructed in such a way that the stationary piston thereof may be supplied with cooling liquid maintaining the piston-and cylinder cool at all times.

With the foregoing and other objects in view, which will appear as the description proceeds, the invention resides in the combination and arrangement of parts and in the details of construction hereinafter described and claimed, it being understood that changes in the precise embodiment of the invention herein disclosed, may be made within the scope of what is claimed, without departing from the spirit of the inven tion.

Referring to the drawings:

Figure 1 is a longitudinal sectional view through a compressor illustrating the construction of the piston wherein a cooling fluid flows through the piston.

Figure 2 is a longitudinal sectional view through the compressor; taken on line 2-2 of Figure 1.

Figure 3 is an end elevational view of the compressor.

Figure 4 is a sectional view taken on line 4-4 of Figure 2.

Figure 5 is a longitudinal sectional view through a modified form of compressor.

Figure 6 is a sectional view taken on line 6-6 of Figure 5.

Figure 7 is an end elevational view of the compressor.

Figure 8 is a sectional view taken on line 8-8 of Figure 6.

Figure 9 is a longitudinal sectional view through a further modified form of compressor.

Figure 10 is a sectional view taken on line ill-l0 of Figure 9.

Figure 11 is a sectional view taken on line ll-ll of Figure 9.

Figure 12 is a longitudinal sectional view through a still further modified form of compressor.

Referring to the drawings in detail, the reference character 5 designates a compressor cylinder, which is provided with removable heads 6. 5 Disposed substantially centrally of the heads 6, are intake valves 1 which are substantially large, to admit a large quantity of air with each stroke of the cylinder. These valves are formed with valve stems 8 that move through openings in the 10 arms 9v that are formed integral with the heads 6. Coiled springs are mounted on the stems 8 and normally urge the valves 1 to their closed positions.

Disposed within the cylinder 5 is a piston ll 15 which is hollow and supplied with an inlet pipe l2 and an outlet pipe l3 communicating with the interior of the piston. In this form of compressor the cylinder is horizontally disposed and the upper inner surface of the piston is inclined up- 20 wardly towards the outlet pipe l3, as clearly shown by Figure 1 of the drawings, with the result that water entering the piston, will be directed upwardly to the outlet pipe I3, thereby creating a circulation within the piston to cool 25 the piston.

A valve opening is formed in each end of the piston, and these openings are provided with valve seats l4 against which the valves I5 seat, the valves being of a construction to permit air 30 to pass into the pipe I6 which has enlarged ends surrounding the valve openings. Communicating with the pipe I6 is a pipe I! that extends from the piston at a point intermediate the ends of the piston, the pipe leading to a suitable com- 5 pressor tank, not shown. Directly opposite to the pipe I l is a supporting bar Hi, the bar l8 and pipe l'l being connected to the support l9, by means of the straps 20.

Elongated openings 2| are formed in opposite 0 sides of the cylinder 5, through which the pipes l1 and supporting bar l8 extend and permit reciprocation of the cylinder, over the piston. A connecting yoke 2| is secured at one end of the cylinder, through which yoke the movement may 5 be imparted from a suitable power device, to the cylinder. Thus it will be seen that as the cylinder is reciprocated over the piston, air will be drawn into the pipe l6 at one end thereof and with the return stroke of the cylinder air will 5 be forced into the opposite end of the pipe l6, forcing the air through the pipe I! to the compressor tank. I

In the form of the invention as shown by: sheet 2 of the drawings, a compressor cylinder is indicated by the reference character 22, the compressor cylinder having elongated openings 23 in opposite sides thereof, to accommodate the pipes 24 that extend into the piston 25 supplying cooling liquid to the interior of the piston to maintain the piston 0001.

One end of the cylinder is closed by the head 26 which is formed with a valve opening to accommodate the valve 21 which operates when suction is created within the cylinder, due to the operation of the cylinder and the piston.

The piston 25 is provided with an intake valve 28 through which air passes, when the cylinder moves to a position as shown by Figure 6 of the drawings. At the opposite end of the piston is a valve 29 that operates in the opposite direction, the valves'26 and 29 being mounted in enlargements formed at the ends of thepipe 30. It will be seen that the

valves

28 and 29 are so arranged that air may pass directly through the cylinder, allowing air to pass through the pipe 3| and through the pipe 34, to the air compressor tank not shown.

30 In Figures 9 and 10 the reference character indicates a compressor cylinder which operates over the piston 36, the piston 36 being provided with an inlet pipe 31 through which cooling liquid passes to-the piston. This pipe 31 is sup- 35 ported within the outlet pipe 38, which is slightly larger than the inlet pipe 31, providing a passageway between the pipes to allow the cooling liquid topass upwardly and away from the piston, after it has accomplished'its purpose. A head 39 is formed at the lower end of the pipe 38, which head is provided with a plurality of openings 40 allowing the cooling liquid to pass into the pipe 38. i

Mounted within the piston 36 is a pipe 4| formed with enlargements 42 at its ends, the enlargements housing valves that admit air to the pipe 4| when the cylinder 35 operates thereover, but prevent air from passing from the pipe substantially intermediate the ends of the pipe 4| and provides an outlet for the air entering the pipe 4|. A supporting rod 44 connects with the piston 36 and is bolted to the support 45,

whereby the piston is held in its operative position at all times.

' Mounted within one end of the cylinder 35 is a valve 46 that operates through the suction of the cylinder'operating over the piston to admit air to the cylinder.

In the form of the invention as shown by Figure 12 of the drawings, the cylinder 41 is disposed vertically, and is'provided with elongated openings 48 that accommodate the pipes 49 con- 65 nected with the piston 50.

These pipes 49 communicate with pipes 5| that have their open ends disposed adjacent to opposite ends of the piston so that a cooling fluid may be directed to the interior of the piston to maintain the piston cool at all times. In this form of the invention the pipe 52 through which air passes, is supported within the piston and has enlarged ends providing valve housings for valves which admit air to the pipe at each 75 stroke of the cylinder. Communicating with the pipe 52 is an outlet pipe 53 that directs air comdrain valve to drain the air pipes of any condensation or liquid which may collect therein.

It is further pointed out that suitable means may be provided for lubricating the piston, reducing wear and friction to the minimum.

Having thus described the invention, what is claimed is: f

1. A compressor of the class described, comprising a stationary hollow piston, a pipe extending through the piston, an inlet valvein one end of the pipe, an outlet valve in the opposite end of the pipe, a cylinder operating over the piston and having inlet valves in the ends thereof, means for directing cooling liquid to the interior of the piston, and a connecting rod connected to the cylinder whereby the cylinder may be operated.

2. A compressor of the class described, comprising a hollow piston, a cylinder adapted to reciprocate over the piston, inlet valves disposed in the ends of the cylinder, a longitudinal pipe extending through the piston, an inlet valve in gitudinally through the piston, valves in the ends of the pipe and adapted to control the passage of 'air through the pipe, an outlet pipe connected with the first mentioned pipe, means for directing cooling liquid to the piston, and a connecting rod connected to the cylinder and adapted to reciprocate the cylinder over the piston.

4. A compressor of the class described, comprising a hollow piston, a cylinder adapted to reciprocate over the piston compressing air, a pipe extending through the piston, the ends of the pipe communicating with the spaces at the ends of the cylinder whereby air is compressed when the cylinder operates over the piston, and means for directing cooling liquid to the interior of the piston.

5. A compressor of the class described comprising a hollow piston, a cylinder adapted to reciprocate over the piston compressing air, a pipe extending longitudinally through the piston, valves in the ends of the pipe controlling the passage of air through the piston, a pipe extending into the piston and connected with the piston at a point intermediate the ends of the piston, supplying cooling liquid to the interior of the piston, an outlet pipe extending into the piston whereby cooling liquid may pass from the piston, and the inner surface of the piston being inclined towards the outlet pipe, directing cooling liquid to the outlet pipe.

. ORLANDO B. JOHNSON.