Robert A Mayfield

US Patent:

8454334, Jun 4, 2013

Filed:

Feb 10, 2011

Appl. No.:

13/024356

Inventors:

Joseph Heger - West Salem WI, US
Robert Mayfield - Pueblo West CO, US

Assignee:

Trane International Inc. - Piscataway NJ

International Classification:

F01C 21/04
F01C 1/16
F04C 29/02
F04C 2/16
F04C 18/18

US Classification:

418 84, 418 83, 418 87, 418 97, 418 99, 4182011, 4182012, 4182068

Abstract:

A compressor system includes a lubricant reservoir, a screw compressor, and a valve. The screw compressor includes a housing defining a compression chamber having a suction port, a discharge port, a first lubricant feed port located between the suction port and the discharge port, and a second lubricant feed port located between the discharge port and the first lubricant feed port. The valve is in fluid communication with the lubricant reservoir, the first lubricant feed port via a first lubricant feed passageway, and the second lubricant feed port via a second lubricant feed passageway. The valve is movable between a first position and a second position. In the first position, the valve fluidly connects the lubricant reservoir to the first lubricant feed passageway to direct lubricant to the first lubricant feed port. In the second position, the valve fluidly connects the lubricant reservoir to the second lubricant feed passageway to direct lubricant to the second lubricant feed port.

US Patent:

61357448, Oct 24, 2000

Filed:

Apr 28, 1998

Appl. No.:

9/070827

Inventors:

Garry E. Andersen - La Crosse WI
Robert A. Mayfield - Pueblo West CO

Assignee:

American Standard Inc. - Piscataway NJ

International Classification:

F01C 116

US Classification:

4182012

Abstract:

A screw compressor employs a piston unloader disposed in a bore remote from the compressor's working chamber. Flow communication between the bore and working chamber is through a series of unloader ports. The unloader piston has an end portion of uniform geometry which causes the physically non-overlapping unloader ports to, in effect, overlap in operation and is such that the unloader piston need not be maintained in any specific orientation within the bore in which it resides in order to unload the compressor in a continuous fashion.