US1923519A

US1923519A - Compressor

Info

Publication number: US1923519A
Application number: US505387A
Authority: US
Inventors: Tisserant Auguste Alber Honore
Original assignee: Individual
Current assignee: Individual
Priority date: 1929-12-30
Filing date: 1930-12-29
Publication date: 1933-08-22
Anticipated expiration: 1950-08-22

Description

Allg- 1933- A. A. H. TISSERANT 1,923,519

COMPRESSOR Filed Dec. 29, 1930 Patented Aug. 22, 1933 UNITED STATES 1.923.519 comnusson Auguste Albert Honor Tisserant, St. Cloud, France Application December 29, 1930, Serial No.

505,387, and in France December 30, 1929 20lalms.

The present invention is concerned with improvements in a fluid compressor, of the type in which tightness between the cylinder and the piston is assured by a metallic, annular membrane folded on itself in the form of a bellows,

and secured at one of its extremities to the cylinder head and at its other extremity to the piston head.

My invention will be hereinafter described in detail with reference to the appended drawing, given merely by way of example, and which is an axial sectional view of a preferred embodiment of my invention.

In the chamber of compression cylinder at the piston b is adapted to reciprocate. A metallic bellows 0, preferably made of brass, forms a fiuidtight joint between the head 17 of piston b and the head a of cylinder a. Said bellows is tightly held at its ends, on the one hand, at 0 29 between cylinder at and its head consisting of a plate a bolted on the cylinder, and at the other end, at 0 between the head b of piston b and a cap-shaped piece 12, mounted on an axial teat b integral with the head 11 of the piston, and maintained in position by means of a stud d screwed in said teat b A nut d screwed on said stud d is adapted to receive the thrust of a push rod e disposed along the axis of the cylinder and of the piston and adapted to slide in 30 a guide e integral with the head a of cylinder at. The outer end e of said push rod e is acted upon by a cam f keyed on shaft f, suitably journalled in a bearing g which is provided in a prolonger part g. Said part 9 forms a casing for push rod e and its driving mechanism, and is integral with the head a of the cylinder.

A spiral spring h screwed at its ends upon guide e of push rod e and upon cap (1, integral with the head of piston d, respectively, tends constantly to force said piston into its upper extreme position.

The compressor comprises inlet valve i, and outlet valve is, the first of which is connected, through conduit to the source of fluid to be compressed, and the second, through conduit id, to the compressed fluid reservoir (not shown). A conduit i is branched to conduit i Said conduit, which is provided in the wall of cylinder c, establishes a communication through port i between inlet conduit i and auxiliary chamber 1 limited by the external face of the bellows 0, cylinder (1 and piston b.

The operation of the device is as follows: The fluid to be compressed, admitted into cylinder 11 under piston 12 through conduit 2' and inlet valve 2, on the upward stroke of the piston produced by the contraction of spring h, is, on the following downward stroke of the piston, (produced by the action of push rod e upon the head of the piston) sent, after it has been compressed, past outlet valve is, through conduit k into the reservoir provided for this purpose.

The left-hand part of the drawing shows the parts in their position at the end of the downward stroke. The right-hand half shows the same parts in their position at the end of the outward stroke. During the downward stroke of the piston, the volume of auxiliary chamber Z increases, and the fluid to be compressed can enter, through inlet conduit i conduit i and port i into chamber Z. During the upward stroke of the piston on the contrary, the volume of auxiliary chamber Z diminishes and the fluid present in said chamber is forced out, through port 2' and conduit i into inlet conduit i It should be remarked that cylinder (1, piston 72, bellows 0, spring h, push rode and its guide e are all disposed concentrically, whereby the compressor occupies a relatively small space.

The space 111. enclosed by bellows c is complete- 89 ly filled with oil, introduced into chamber n provided in casing g, which is integral with head a of cylinder (1. Oil can thus circulate between chambers m and 12 during the combined motions of membrane a and piston 22 and deaden the vibrations of the bellows.

It should be noticed that piston 11 is a true piston in the ordinary meaning of the word adapted to perfectly fit the inner surface of the cylinder, so as to reduce the clearance space to 90 a minimum. Its gas-tight fit against the walls of the cylinder can be obtained as a result of the accuracy of its adjustment and through the intermediary of elastic packings.

While I have disclosed what I deem to be the preferred form of my device, I do not wish to be limited thereto as there might be changes made in the construction, disposition and form of the parts, without departing from the principle of my invention as comprehended within the scope of the appended claims.

What I claim is:

1. A compressor comprising in combination, a cylinder, a cylinder head, a hollow piston open within the cylinder reciprocable with a fluidtight fit therein, means for imparting a reciprocating motion to said piston in said cylinder, an annular metallic bellows secured in a fluidtight manner at one end to the cylinder head and at the other end to the head of said piston so as to 1m leave a space between said bellows and the inner wall of said piston, a viscous liquid filling the whole of the inside of said bellows, inlet and outlet valves provided in the cylinder chamber, inlet and outlet pipes connected with said inlet and' metallic bellows secured in a fluidtight manner at the upper end to the cylinder head, and at the lower end to the bottom of said piston so as to leave a space between said bellows and the inner cylindrical wall of the piston, a viscous liquid filling the whole of the inside of the bellows, inlet and outlet valve provided in the bottom of said cylinder, inlet and outlet pipes connected with said inlet and outlet valves respectively, the cylinder being provided with a hole extending throughout its cylindrical wall and located in the vicinity of the upper end of said cylinder so that said hole is always in communication with the space between the outer face of said bellows and the inner cylindrical wall of the piston, and a conduit permanently connecting said hole with said inlet pipe.

AUGUSTE ALBERT HONORE TISSERANT.