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:
Dec. 29, 1992
Filed:
Jul. 10, 1990
Peter D Waters, San Diego, CA (US);
John M Champagne, Seattle, WA (US);
John F Defenbaugh, Rockford, IL (US);
Sundstrand Corporation, Rockford, IL (US);
Abstract
A surge control (200) for a compressor (12) which produces a compressed gas in accordance with the invention includes a surge control valve (88) having a variable opening which is controlled by an electrical control signal which controls a flow rate of compressed gas flowing through a bypass line (84) between a point of higher pressure and a point of lower pressure in the compressor to control surge; a pressure transducer (120and 122), coupled to the compressor at a point of pressure higher than an inlet to the compressor, for producing an electrical signal representative of pressure; a filter (124), coupled to the pressure transducer, for filtering a selected frequency component of pressure fluctuations represented in the electrical signal to produce a filtered signal; and a controller (132), coupled to the filter, for producing the control signal as a function of the filtered signal.