Bruce A Fraser

US Patent:

6468060, Oct 22, 2002

Filed:

Mar 2, 1998

Appl. No.:

09/032971

Inventors:

Michael J. Dormer - Fabius NY
Bruce A. Fraser - Manlius NY
Wayne P. Beagle - Chittenango NY
Peter F. Kaido - Verona NY
Kyle D. Wessells - Syracuse NY

Assignee:

Carrier Corporation - Syracuse NY

International Classification:

F04B 3910

US Classification:

417569, 137246, 137856, 251355

Abstract:

The seat of a suction valve of a reciprocating compressor is modified to limit the radial extent and thereby the area in which an annular oil film can be established between the valve and the valve seat. The preferred radial extent of the seating surface is 0. 014 to 0. 018 inches and the preferred ratio of the area of the suction valve seat to the passage therethrough is in the range of 13% to 25%.

US Patent:

6565336, May 20, 2003

Filed:

May 6, 1998

Appl. No.:

09/073308

Inventors:

Bruce A. Fraser - Manlius NY
Wayne P. Beagle - Chittenango NY
Peter F. Kaido - Verona NY

Assignee:

Carrier Corporation - Syracuse NY

International Classification:

F04B 3910

US Classification:

417569, 137856, 417446

Abstract:

In its unstressed state, a suction valve is spaced from its valve seat such that the suction valve must be deformed against its inherent spring force in order to achieve seating. The spring force due to deformation provides an opening bias to the suction valve such that it opens earlier in the suction stroke and offsets the effects of adhesion due to the presence of oil between the seating surface and the valve.

US Patent:

6739853, May 25, 2004

Filed:

Dec 5, 2002

Appl. No.:

10/313722

Inventors:

Yan Tang - Daphne AL
Bruce A. Fraser - Manlius NY

Assignee:

Carrier Corporation - Farmington CT

International Classification:

F04C 1800

US Classification:

4182012, 4182011, 418180, 418 87, 13711506

Abstract:

An axial slide valve is provided with an axially extending fluid chamber at each end with one chamber receiving a spring and being acted on by suction pressure and the other chamber coacting with a fixed piston and being acted upon by discharge pressure or the like whereby the slide valve is positioned so as to balance the spring and fluid pressures and thereby the compressor capacity.

US Patent:

6887052, May 3, 2005

Filed:

Jan 13, 2004

Appl. No.:

10/756016

Inventors:

James William Bush - Skaneateles NY, US
Robert Wilson - Canton CT, US
Bruce A. Fraser - Manlius NY, US

Assignee:

Scroll Technologies - Arkadelphia AR

International Classification:

F03C002/00

US Classification:

418 552, 418 554, 418 556, 418178, 418 1, 29888022

Abstract:

A scroll compressor is provided with a generally spiral wrap having an abradable or conformable coating on radially inner portions of its tip. The coating is not applied to radially outer portions. During operation of the scroll compressor, the coating will eliminate tip gap leakage adjacent radially inner, higher discharge pressure portions of the compression process. The outer, non-coated portions will bear the axial load, and ensure the coating will not wear away to an undue amount.

US Patent:

7179067, Feb 20, 2007

Filed:

Jan 13, 2004

Appl. No.:

10/756019

Inventors:

James William Bush - Skaneateles NY, US
Robert Wilson - Canton CT, US
Bruce A. Fraser - Manlius NY, US

Assignee:

Scroll Technologies - Arkadelphia AR

International Classification:

F03C 2/00
F04C 18/00

US Classification:

418 552, 418 551, 418178

Abstract:

An abradable coating is formed on portions of the flank wall of the wraps of a scroll compressor. The radially outer portions of the flank wall are left uncoated, and can bear a force between the scroll wraps. In this manner, the load is not transferred through a coated portion, but rather through the uncoated portion. As the scroll wraps move relative to each other at run-in, the abradable coating wears away leaving a tight fit between the flank walls at the radially inner locations.

US Patent:

7255542, Aug 14, 2007

Filed:

May 31, 2005

Appl. No.:

11/140721

Inventors:

Alexander Lifson - Manlius NY, US
Bruce A. Fraser - Manlius NY, US

Assignee:

Scroll Technologies - Arkadelphia AR

International Classification:

F01C 1/063
F01C 1/00
F03C 2/00
F03C 4/00
F04C 2/00
F04C 18/00

US Classification:

418 551

Abstract:

A unique positioning of a discharge tube relative to a pivot axis of a check valve in a compressor reduces the wear and fatigue stresses on the pivoting check valve components. The tube is centered on an axis that is non-perpendicular to an axis that is parallel to the pivot axis of the check valve, and in one embodiment was at 45. With the inventive positioning of the discharge tube relative to the pivot axis, the flow streamlines heading from the discharge port to the discharge tube are no loner normal to the flapper valve surface, and the amount of wear between moving valve components and fatigue stresses are reduced.

US Patent:

8317494, Nov 27, 2012

Filed:

Feb 7, 2005

Appl. No.:

11/814994

Inventors:

Peter J. Pileski - Manlius NY, US
Bruce A. Fraser - Manlius NY, US

Assignee:

Carrier Corporation - Farmington CT

International Classification:

F04B 17/03
H02K 11/00

US Classification:

4174105, 310 71

Abstract:

A compressor () has a housing () having first () and second () members. A motor () within the housing () is coupled to one or more working elements () to drive the one or more working elements () to compress a fluid. A number of electrical terminals () are each mounted in an associated aperture () in the second housing member () and electrically connected to the motor ().

US Patent:

20090311119, Dec 17, 2009

Filed:

Jul 27, 2007

Appl. No.:

12/307805

Inventors:

Steven J. Holden - Manlius NY, US
Alexander Lifson - Manlius NY, US
Bruce A. Fraser - Manlius NY, US

Assignee:

CARRIER CORPORATION - Farmington CT

International Classification:

F04C 18/16
F04C 28/00
F01C 20/18

US Classification:

418 1, 4182011, 418 27

Abstract:

A screw compressor has a housing () having first () and second () ports along a flowpath. A first rotor () has a lobed body. A second rotor () has a lobed body enmeshed with the first rotor body. The rotors and housing cooperate to define a compression path between suction () and discharge () locations along the flowpath. Means () provide relative longitudinal movement between a blocking portion () of the housing and at least one of the first rotor and second rotor between: a first condition wherein a pocket of the first and second rotors is closed by the blocking portion; and a second condition wherein the blocking portion does not close the pocket. To provide capacity control, a control system () is configured to provide duty cycle control of the movement.

Author:

Bruce Fraser

ISBN #:

0201627205

Author:

Bruce Fraser

ISBN #:

0201688883

Author:

Bruce Fraser

ISBN #:

0201700131

Author:

Bruce Fraser

ISBN #:

0201721996

Author:

Bruce Fraser

ISBN #:

0201773406

Author:

Bruce Fraser

ISBN #:

0117003409

Author:

Bruce Fraser

ISBN #:

0122658507

Author:

Bruce Fraser

ISBN #:

0321115600