The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Feb. 12, 2008
Filed:
Dec. 17, 2004
Dennis Lee Shaffer, Thomasville, PA (US);
Russell Mark Thompson, York, PA (US);
Stephen Michael Kachmar, Dover, PA (US);
Eric John Smyder, York, PA (US);
Brenda Jane Roberts, Dover, PA (US);
Daniel J. Petroskie, Goldsboro, PA (US);
Ryan Perry Eisensmith, York, PA (US);
Dennis Lee Shaffer, Thomasville, PA (US);
Russell Mark Thompson, York, PA (US);
Stephen Michael Kachmar, Dover, PA (US);
Eric John Smyder, York, PA (US);
Brenda Jane Roberts, Dover, PA (US);
Daniel J. Petroskie, Goldsboro, PA (US);
Ryan Perry Eisensmith, York, PA (US);
York International Corporation, York, PA (US);
Abstract
A control system for a steam turbine driven chiller unit is provided. The control system automatically utilizes the full range of the governor, compressor pre-rotation vanes, and hot gas bypass valve capabilities to control the capacity of the chiller and provide anti-surge and override control functions to prevent undesirable operational ranges while maintaining maximum efficiency of operation.