US1506219A - Reciprocating engine - Google Patents

Description

c. s. CLARK RECIPRQCATING ENGINE Flled July s, 192? Aug. 26 1924.

Patented Aug. 26, 1924.

UNITED STATES CARL s. CLARK. or CLEVELAND. onio, Assienoa or ouaiiALr To A.. ionr'nous, or CLEVELAND, onto.

RECIPRCCATING n'NGiNE.

Appneanon mea July 3, m22'. serial No. 572,620.

Be it known that I, CARL S. CLARK, a citizen of the United States, residing at Cleveland, in the county of Cuyahoga and State of Chio, have invented certain new and useful Improvements in Reciprocating Engines, of which the following is aspecificeton. I i

Thisinvention relates to reciprocating engines and is particularly adapted for use with air hammers and the like. It can be used with either compressed air o`r steam, but is particularly applicable for use with compressed air.

In the drawings Fig. 1 is a sectional side elevation of the device; Fig. 2 is a vertical sectional view through the moving parts showing the parts in one position and moving in the direction indicated by the arrow the outer casing being omitted; and Fig. 3 is a view similar to Fig. 2 showing the parts in another position and moving in the op posite direction as .indicated by the arrow.

The device consists of a cylinder 1 having its forward end 2 closed and having a rod 3 extending outwardly therefrom to which a hammer head or whatever the device is used with may be attached. The opposite end is closed by a plug 4 being screwed there-into and a hollow rod 5 ex tends through this' plug and a stuffing box 6 is mounted thereon to prevent any escape of air. The cylinder 1 is adapted to move back and forth upon the hollow rod 5 and consequently the rod 3 and anything connected thereto are moved back and forth.

In order to guide the cylinder and control it in its movement it is mounted in a hollow tube 7 having a bushed hole 8 in its forward end through which the rod 3 extends and works back and forth therein. The tube 5 extends through a plug 9 in the opposite end of the tube 7 and is held securely in said plug.

Mounted within the cylinder 1 is a reciprocating member 10 bored at each end as indicated at 11 and 12 and having a partition 13 between the two.` bored ends 11 and 12, and said partition is bored as indicated at 14 and the rod 5 extends through this bore 14: and is adapted to fit snugly therein. The rod 5 has a shoulder 15 thereon which will strike the partition 13 when the device is in the position shown in Fig. 2 and the end of the rod 5 is closed by a screw 16 around which is mounted a collar 17, tlle outside diameter of which is about 'the saine diameter as the shoulder 15 and this collar 17 is adapted to engage the opposite side of the partition 13'when the device is in the position shown in Fig. 3. As willbe seen the shoulder 15 and the collar 17 limit the vmov'ement of lthe member 10. The forward end of the tube 5 has spaced ports 18 and 13 therein,- the ports 18 being uncovered when the'deviee is in the position. shown inFig. 2 and the ports. 19 bei-ng uncovered when it is in the position shown in Fig. 3.

The cylinder 1 has exhaust ports 2() and 21 therein which are adapted to be covered or uncovered by the member 10.

This device operates as follows: The air hose is connected to the end of the hollow tube 5 as indicated at 22 and air passes through the bore 23 of the tube 5, and out the ports 18 (Fig. 2) and forces the cylinder l in the direction indicated by the arrow in Fig. 2. While the cylinder is moving forward the air trapped in the rear end thereof will be compressed and the cylinder will move forward until the port 2O rides past the end of the member 10 when the air being fed through the ports 18 will escape out the port 20 to the atmosphere through hole 30 in handle tube 7. This will make the pressure on 'this end less than the pressure on the other end due to the air compressed therein. Then the compressed air in the other end of the cylinder will cause the member 10 to move forwardly into the position shown in Fig. 3 which will 'cover the ports 18 and uncover the ports 19 and allow the compressed air to be admitted to the opposite end of the cylinder 1 which will cause it to move in the direction of the arrow in 9 Fig. 3 until the port 21 rides past the end of the member 10 which will cause the air compressed in the opposite end of the cylinder to force the member to back into the position shown in Fig. 2, etc.

It will be seen, therefore, that the outer tube 7 provides an enclosing handle containing the reciprocating combined piston and cylinder 1 in which works the tubular con trolling valve member 10 governing the inlet to and exhaust from the cylinder.

I claim:

1. In a motor, the combination of a reciprocating cylinder having spaced exhaust ports, a pressure supply pipe projecting into spaced inlet ports, and a tubular piston valve mounted to reciprocate between the pipe and the cylinder and controllingall of said ports.

2. In a motor, the combination o f a pressure supply pipe having spaced ports in one end thereof, a cylinder mounted to reciprocate upon said pipe and enclosing said end, and having spaced exhaust ports, and a piston valve mounted to reciprocate upon said pipe and within said cylinder and controlling all of said ports.

3. In a motor, the combination of a pres sure supply pipe having spaced ports near one end thereof7 a cylinder reciproeable upon said pipe and having exhaust ports in the side wall thereof spaced from each other and from the ends of the cylinder, and a hollow piston valve reciprocable in the space between the pipe and the cylinder and controlling the respective ports, said piston valve being operated by compression trapped iny opposite ends of the cylinder.

4. In a motor, the combination of a pressure supply pipe having spaced ports near one end thereof, a cylinder reciprocable upon said pipe and having exhaust ports in the side wall thereof spaced from each other and from the ends of the cylinder, and a hollow piston valve recip-rocable in the space between the pipe and the cylinder and controlling the respective ports, said piston valve being operated by compression trapped in opposite ends of the cylinder and stops on the pipe, Vlimiting the movement of the piston valve.

In testimony whereof, I affix my signature in presence of two witnesses.

` CARL'S. CLARK. Witnesses n L. A. RANsroRD,

JOHN A. BOMMHARDT.

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