US42437A - Improvement in air-pumps - Google Patents

Description

UNITED STATES PATENT QEETCE.

H. H. HENDRICK, OF CINCINNATI, OHIO, ASSIGNOR T() HIMSELF AND J. J.- RIDDLE, OF SAME PLAGE.

IMPROVEMENT IN AIR-PUMPS.

To aZZ whom, it may concern:

Be it known that I, II. H. HENDRICK, of Cincinnati, in the county ot' Hamilton and State of Ohio, haveinvented a new and usei'ul Improvement in Valves for Air-Pumps; and I do hereby declare that the following is a full, clear, and exact description ot' the same, reference being had to the accompanying drawings, forming part of this specilication, in which- Figure l represents a longitudinal central section of my invention. Fig. 2 is a similar section of a modification of the same.

Similar letters of reference in both views indicate corresponding parts. v

This invention consists in the application of a cone-valve made of or covered with indiarubber, leather, or other flexible material, in combination with a common hard-metal valveseat, and with a reciprocating piston, in ,such a manner that any impurities-such as hairs or fiber-which may detach themselves from the packing ofthe piston and lodge between the valve and its seat, do not prevent the valve from closing down airtight, and the operation ofthe pump is not interrupted.

A modification of my invention consists in the application of an india rubber or leather valve-seat or metal valve-seat, covered with leather or other flexible materials,in eombiuation with a cone-valve made of indiarubber or hard metal and with a reciprocating piston in fuch a manner that the valve is enabled to close down tight notwithstanding hairs, bers, or other small impurities may lodge between it and its seat.

To enable others skilled in the art to make and use my invention, I will proceed to describe it.

A represents the barrel or cylinder of an ordinary air-pump, made of brass or other suitable material and provided with a piston, B, to which a reciprocating motion is imparted by a handle, C.

D is a cone-valve which closes in its seat E, being held in place by a spring, F. Itthe piston moves toward the valve, it closes, or ought to close, air-tight in order to insure a correct operation of the pump.

If the valve and its seat are both made of hard metal, and ground up carefully, said valve will close air-tight, provided no impurities get between it and its seat; but in working the piston hairs or fibers vor other small particles are liable to detach themselves and to lodge on the valve-seat and the operation of the pump is interrupted. In order to avoid this di'iculty, I use a valve of indiarubber, (suchas shown in Fig. 2,) or instead ot' india-rubber, leather, or other "liexible material. By these means the valve is enabled to close down perfectlytight in its seat, even if hairs, fibers, or other small particles lodge on the latter and the operation of the pump is rendered much more certain than it is with valves or valveseats of the ordinary construction.

I. am aware that it is common to construct pumps of various descriptions with yielding valves or valve-seats, and therefore do not claim novelty in this principle; but

I do claim as new and desire to Secure by Letters Patent- In an air-pump ofthe construction specified, the combination of the elastic valve D with the seat E, spring F, cylinder A, and piston B, all arranged and operatin g as described.

H. H. HENDRIOK.

Vitnesses '.IHos. S. J. DoUGLAs, D. ROBERTSON.

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