Air compressor

Details Air compressor Air compressor

1974-09-26

1976-06-08

Freeh, William L.

Pumps

Expansible chamber type

Fluid serially moved to opposite side of pumping member

92171, 417566, F04B 2104, F01B 700

Patent

active

039618692

ABSTRACT:
The invention provides an air compressor of low cost, high quality, long life and of simple and rugged construction and ready replaceability of the chief wear parts as a unit. The compressor employs a wobble piston with a Teflon or equivalent packing on the wobble piston, which packing bears against the surface of a working cylinder of aluminum with a hardened polished surface. The working cylinder in the form of a cylindrical sleeve is seated at its lower end on a circular shoulder in the main housing or frame. At its upper end it is seated and sealed in a groove in a head plate which provides a cylinder head for the cylinder and a closure for the top of the main frame. An inverted cup shaped delivery chamber rests upon and is secured to and sealed by an O-ring of heat resistant rubber to the head plate to receive the delivery of compressed gas and to provide anchorage for a delivery pipe or pipes. The discharge check valve of flanged duck bill formation is held in place by pressure fit of a metal ring in an annular recess, which ring engages and retains the flange of the discharge valve. The Teflon cup leather is clamped to the end of the combined piston and connecting rod by press fitting a ring of metal upon the cylindrical end of said piston, and heat is dissipated from the compressed gas through contact with metal parts which communicate directly, conductively, with outside air and/or radiation cooled surfaces. The Teflon cup and polished cylinder are self-lubricating; the crank shaft and crank pin are self-lubricating by the use of either oil impregnated bushings or by the use of ball bearings; efficiency of compression is aided by the provision of minimum clearances between the piston, the cylinder head, and the discharge check valve. The structure disclosed herein permits of replacement of the working parts consisting of the head plate with a sealing O-ring, and an affixed cylinder with a discharge check valve along with the wobble piston and rod, all assembled as a unit.

REFERENCES:
patent: 1451033 (1923-04-01), Todd
patent: 1883328 (1932-10-01), Biltl et al.
patent: 2138605 (1938-11-01), Landis
patent: 2576200 (1951-11-01), Rotz
patent: 2723052 (1955-11-01), Yuza
patent: 2836474 (1958-05-01), Mosher
patent: 2842284 (1958-07-01), Flick
patent: 2963217 (1960-12-01), Wysong, Jr.
patent: 2985358 (1961-05-01), Lee et al.
patent: 3331328 (1967-07-01), Smith et al.
patent: 3628427 (1971-12-01), Bailey

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