Douglas G Schmidt

Author:

Douglas C. Schmidt

ISBN #:

0201604647

Author:

Douglas C. Schmidt

ISBN #:

0201607344

Author:

Douglas C. Schmidt

ISBN #:

0201633566

Author:

Douglas C. Schmidt

ISBN #:

0201795256

Author:

Douglas C. Schmidt

ISBN #:

0470059028

Author:

Douglas C. Schmidt

ISBN #:

0471248754

Author:

Douglas C. Schmidt

ISBN #:

0471486485

Author:

Douglas C. Schmidt

ISBN #:

0471606952

US Patent:

6505475, Jan 14, 2003

Filed:

May 23, 2000

Appl. No.:

09/577703

Inventors:

Kevin Zugibe - Pomona NY
Douglas Schmidt - Tomkins Cove NY

Assignee:

Hudson Technologies Inc. - Pearl River NY

International Classification:

F25B 4902

US Classification:

62192, 62208, 62126

Abstract:

An apparatus for optimizing an efficiency of a refrigeration system comprising means for measuring a refrigeration efficiency of an operating refrigeration system: means for altering a process variable of the refrigeration system during efficiency measurement: and a process for calculating a process variable level which achieves an optimum efficiency. The process variables may include refrigerant charge and refrigerant oil concentration in evaporator.

US Patent:

7059143, Jun 13, 2006

Filed:

Jan 8, 2003

Appl. No.:

10/338941

Inventors:

Kevin Zugibe - Pomona NY, US
Douglas Schmidt - Tomkins Cove NY, US

Assignee:

Hudson Technologies Inc. - Pearl River NY

International Classification:

F25B 31/00
F25B 1/00

US Classification:

62192, 62114, 62502, 252 68

Abstract:

An apparatus for optimizing an efficiency of a refrigeration system, comprising means for measuring a refrigeration efficiency of an operating refrigeration system; means for altering a process variable of the refrigeration system during efficiency measurement; and a processor for calculating a process variable level which achieves an optimum efficiency. The process variables may include refrigerant charge and refrigerant oil concentration in evaporator.

US Patent:

7086240, Aug 8, 2006

Filed:

Jul 14, 2005

Appl. No.:

11/182249

Inventors:

Kevin Zugibe - Pomona NY, US
Douglas Schmidt - Tomkins Cove NY, US

Assignee:

Hudson Technologies Inc. - Pearl River NY

International Classification:

C09K 5/04
G01K 13/00
F25B 31/00
F25B 1/00

US Classification:

62114, 62129, 62502, 62192, 252 67, 252 68

Abstract:

An apparatus for optimizing an efficiency of a refrigeration system, comprising means for measuring a refrigeration efficiency of an operating refrigeration system: means for altering a process variable of the refrigeration system during efficiency measurement: and a processor for calculating a process variable level which achieves an optimum efficiency. The process variables may include refrigerant charge and refrigerant oil concentration in evaporator.

US Patent:

7533536, May 19, 2009

Filed:

Aug 8, 2006

Appl. No.:

11/463101

Inventors:

Kevin Zugibe - Pomona NY, US
Douglas Schmidt - Tomkins Cove NY, US

Assignee:

Hudson Technologies, Inc. - Pearl River NY

International Classification:

G01K 13/00
F25B 43/02
F25B 31/00

US Classification:

62127, 62 84, 62129, 62192, 62201

Abstract:

An apparatus for optimizing an efficiency of a refrigeration system, comprising means for measuring a refrigeration efficiency of an operating refrigeration system; means for altering a process variable of the refrigeration system during efficiency measurement; and a processor for calculating a process variable level which achieves an optimum efficiency. The process variables may include refrigerant charge and refrigerant oil concentration in evaporator.

US Patent:

7805952, Oct 5, 2010

Filed:

May 19, 2009

Appl. No.:

12/468506

Inventors:

Kevin Zugibe - New City NY, US
Douglas Schmidt - Tomkins Cove NY, US

Assignee:

Hudson Technologies, Inc - Pearl River NY

International Classification:

F25B 43/02

US Classification:

62 84, 62125, 62126

Abstract:

An apparatus for optimizing an efficiency of a refrigeration system, comprising means for measuring a refrigeration efficiency of an operating refrigeration system; means for altering a process variable of the refrigeration system during efficiency measurement; and a processor for calculating a process variable level which achieves an optimum efficiency. The process variables may include refrigerant charge and refrigerant oil concentration in evaporator.

US Patent:

8327653, Dec 11, 2012

Filed:

Oct 5, 2010

Appl. No.:

12/898289

Inventors:

Kevin Zugibe - New City NY, US
Douglas Schmidt - Tomkins Cove NY, US

Assignee:

Hudson Technologies, Inc. - Pearl River NY

International Classification:

C09K 5/04

US Classification:

62114, 62125, 62129

Abstract:

An apparatus for optimizing an efficiency of a refrigeration system, comprising means for measuring a refrigeration efficiency of an operating refrigeration system; means for altering a process variable of the refrigeration system during efficiency measurement; and a processor for calculating a process variable level which achieves an optimum efficiency. The process variables may include refrigerant charge and refrigerant oil concentration in evaporator.

US Patent:

49206516, May 1, 1990

Filed:

Feb 13, 1989

Appl. No.:

7/309610

Inventors:

Douglas W. Schmidt - Tomkins Cove NY

International Classification:

B27C 110

US Classification:

30475

Abstract:

A sheetrock beveling apparatus having a housing with a substantially planar surface on one side thereof. A handle is attached to the other side of the housing. A blade is rotatably attached to the housing about an axis and includes an electric motor for selectively causing the blade to rotate. An elongated guide is attached to the housing on the planar surface thereof so that it can travel in a seam between two abutting pieces of sheetrock to guide the blade along the edges of sheetrock to bevel the abutting edges of the sheetrock. This elongated guide extends longitudinally transverse to the axis of the rotation of the blade. The blade is longer in the center portion thereof than at the sides thereof to produce a tapering effect so that the more sheetrock is removed closer to the seam and progressively less is removed from the edge of the sheetrock as the distance from the seam between the two pieces of sheetrock increases.