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:
Nov. 06, 1990
Filed:
Jun. 22, 1989
Martha Fisher-Votava, Rockford, IL (US);
Sundstrand Corporation, Rockford, IL (US);
Abstract
A sleeve seal heating system for a multi-stage compressor is disclosed. The multi-stage compressor includes a mechanism for dissipating heat disposed between and in fluid communication with a pair of compressor stages in the multi-stage compressor. The present invention contemplates the inclusion of a mechanism for selectively bypassing the heat dissipating mechanism disposed between and in fluid communication with each pair of compressor stages to thereby warm a succeeding stage, causing the stage to become substantially operative. The mechanism for bypassing comprises a bypass valve. The bypass valve is controlled to bypass the mechanism for dissipating heat when a seal in the succeeding stage is not substantially operative. Each compressor stage comprises a piston reciprocating within a piston chamber, the piston chamber being in valved communication with and between a fluid input and a fluid output. Each piston has a seal about its periphery and between the piston and the piston chamber to thereby prevent fluid from leaking between the piston and the piston chamber. The seal must be heated in order to operate to prevent fluid from leaking between the piston and the piston chamber. Warm inlet air provides this heat.