US1509895A - Oil cup for air compressors - Google Patents

Description

Sept. 30 .1924. 1,509,895

W. A. BALMANNO .OIL CUP FOR AIR COMPRBSSORS Filed March 30, 1922 WiZZZa/mAfiwZman/w W TNESS ATTORNE' Patented Sept. 30, 1924.

UNITED STATES PATENT OFFICE.

WILLIAM A. BALMANNO, F ALBUQUERQUE, NETN' MEXICO.

OIL- CUP FOR AIR GOMPRESSORS.

Application filed March 30, 1922. Serial No.' 542,061,.

To all whom it may concern:

Be it known that 1, WILLIAM A. BAL- MANNO, a citizen of New Mexico, residing at Albuquerque, New Mexico, have invented new and useful Improvements in Oil Cups for Air Compressors, of which the following is a specification.

This invention relates to lubricating devices and has for its object the provision of an oil cup designed for use upon air com pressors, the construction being such that oil within the reservoir portion of the device will be subjected to constant pressure, which pressure will operate to force out oil automatically on the down stroke or working stroke of the compressor and consequently keep all the parts thoroughly lubricated.

An important object is the provision of a device of this character which is so constructed that adjustment may be made to regulate the quantity of oil fed to the compressor at each stroke.

An additional object is the provision of a device of this character which will be simple and inexpensive in manufacture, highly efficient in use, positive in action, durable in service, and a general improvement in the art.

With the above and other objects and advantages in view, the invention consists in the details of construction to be hereinafter more fully described and claimed and illustrated in the accompanying drawings in which- Figure 1 is a side elevation of a portion of the air compressor showing my device associated therewith.

Figure 2 is a longitudinal sectional view through the device.

Figure 3 is a cross sectional view, the view being taken on the line 3-3 of Figure 2.

Figure 4 is a cross section on the line 1 a of Figure 2.

Referring more particularly to the drawings, the letter A designates the cylinder of an air compressor with which my device is designed to be associated for the purpose of lubricating the same. In carrying out my invention I provide a cylindrical shell-like body which has one end reduced, as at 11, and externally threaded for engagement within a suitable hole in the compressor cylinder. This reduced portion leads to an eX- tension 12 which is formed with a plurality of openings of different sizes and shapes for the outlet of oil and is also internally threaded, as shown. The larger portion of the body 10 constitutes a reservoir for oil and has its upper portion externally threaded for engagement thereon of a closure cap 14 which has an air-tight fit. The bottom of this reservoir portion is preferably of inverted conical shape and is provided with a relatively small hole 15 which leads into a slightly enlarged chamber 16 at the lower end of which is formed a valve seat 17.

Extending through the hole 15, chamber 16, and valve seat 17, into the reservoir portion of the device, is a hollow valve stem 18 which terminates short of the cap 14- and which is formed intermediate its ends with a valve 19 cooperating with the seat 17 and which is also formed near its lower end with a collar 20 for a purpose to be described. Screwed into the extension 12 is a plug 21 having a central hole 22 for the passage of the stem 18 and this plug is formed with a recess 28 in which is engaged one end of a coil spring 24 which encircles the stem and which has its other end engaging against the valve 19.

The body is of course filled with oil and the cap 14 is screwed into place tight. \Vhen the compressor makes the upstroke, air under pressure passes through the hollow stem 18 into the reservoir and subjects the oil therein to pressure, which forces the oil by the stem 18 owing to the fact that this stem has its opposite sides slightly flattened, as indicated at 25, for the purpose of providing a loose fit. The oil seeping by the stem or forced by it, passes into and collects within the chamber 16. During this upstroke of the compressor the valve 19 is seated on account of the action of the spring 24. On the ordinary stroke of the compressor the suction through the openings 13 in the eX- tension 12 causes the valve 19 to be unseated against the resistance of the spring, thereby permitting the oil within the chamber 16 to pass out and down into the compressor or pump. By regulating the plug 21 so as to vary the distance between the bottom of the recess 23 therein and the collar 20, it will be apparent that the longitudinal movement of the stem may be regulated so as to vary the rapidity of the oil feed as in actual practice it is preferable that about one drop of oil be supplied to the compressor at each complete stroke.

.lishing communication From the foregoing description and a study of the drawings it will be apparent that I have thus provided a simply constructed and easily installed lubricating cup which works automatically and which will effectively operate to supply lubricant to a 7 pump, compressor engine, or the like without requiring any attentionother than filling when the oil supply becomes depleted.

While I have shown and described the preferred embodiment of my invention, it is of course to be understood that I reserve the right to make such changes in the form, construction and arrangement of parts as will not depart from the spirit of the invention or the scope of the subjoined claims.

What is claimed is;

1, A lubricator of the character described comprising a receptacle formed with a reduced threaded extension for screwing engagement within a hole in a cylinder, a removable cover for the receptacle, the receptacle being adapted to contain oil and having its lower portion formed with a chamber and a valve seat located between the chamber and the main body and estabbetween the interior ofthc body and said chamber, the wall of said chamber portion being formed with openings, a tubular stem located axially of the receptacle and extending below said chamber, said tubular stem having its intermediate portion enlarged to define a valve for closing said seat, a plug screwed into the lower end of the chamber and having a bore through which said tubular stem is slidable,.and a spring encircling said stem and bearing against the top of the plug and the underside of the valve for holding the valve seated, said plug being rotatably adjustable whereby to regulate the tension on said spring.

2. A lubricator of the character described comprising a receptacle formed with a reduced threaded extension for screwing cngagenient within a hole in a cylinder, :1 rc movable cover for the receptacle, the receptacle being adapted to contain oil and having its lower portion formed with a chamber and a valve seat located between the chamber and the main body and establishing communication between the interior of the body and said chamber, the wall of said chamber portion being formed with openings, a tubular stein located axially of. the receptacle and extending below said chamber, said tubular stem having its intermediate portion enlarged to define a valve for closing said seat, a plug screwed into the lower end of the chamber and having a bore through which said tubular stem is slidable, and a spring encircling said stem and bearing against the top of the plug and the underside of the valve for holding the valve seated, said stein being tapered above the valve, and the portion of the receptacle between the main body thereof and the valve seat being "Formed with an opening of Sllllstantially the same dian'icter as the maximum dian'ictcr of the stem whereby said last named opening will be gradually decreased in size when said valve is moved downwardly.

In testimony whereof I afiix' my signature.

VILLIAM. A. BALMA NNO.

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