Charles Scott Singletary

US Patent:

6446451, Sep 10, 2002

Filed:

Mar 30, 2001

Appl. No.:

09/820983

Inventors:

David T. Monk - Bristol VA
Joe T. Hill - Bristol VA
Philip C. Wagner - Bristol TN
Joseph F. Loprete - Bristol TN
Michael R. Young - Bristol TN
Charles A. Singletary - Bristol VA

Assignee:

York International Corporation - York PA

International Classification:

F25B 100

US Classification:

622285, 62229, 417221, 417326

Abstract:

A two-stage reciprocating compressor is provided. The compressor includes a block with a single cylinder and associated single compression chamber and single piston. The compressor further includes a crankshaft. The crankshaft has an eccentric crankpin that is operatively connected to the piston. A reversible motor is provided to rotate the crankshaft in a forward direction and in a reverse direction. An eccentric cam is rotatably mounted on the eccentric crankpin. The eccentric cam is held stationary with respect to the crankpin when the crankshaft is rotating in the forward direction. When rotating in the forward direction, the crankshaft drives the piston at a full stroke between a bottom position and a top dead center position. The eccentric cam rotates with respect to the crankpin when the crankshaft is rotating in the reverse direction. When rotating in the reverse direction, the crankshaft drives the piston at a reduced stroke between an intermediate position and the top dead center position.

US Patent:

62172875, Apr 17, 2001

Filed:

Jan 22, 1999

Appl. No.:

9/235288

Inventors:

David T. Monk - Bristol VA
Joe T. Hill - Bristol VA
Philip C. Wagner - Bristol TN
Joseph F. Loprete - Bristol TN
Michael R. Young - Bristol TN
Charles A. Singletary - Bristol VA

Assignee:

Bristol Compressors, Inc. - Bristol VA

International Classification:

F04B 4906

US Classification:

417 45

Abstract:

A two-stage reciprocating compressor is provided. The compressor includes a reversible motor that rotates a crankshaft. The crankshaft is connected to a piston by a mechanical system. The mechanical system drives the piston at a full stroke between a bottom position and a top dead center position when the motor is operated in a forward direction. The mechanical system drives the piston at a reduced stroke between an intermediate position and the top dead center position when the motor is operated in the reverse direction. The compressor also includes a control for selectively operating the motor in either the forward direction at a first preselected, fixed speed or in the reverse direction at a second preselected fixed speed.