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. 19, 1991
Filed:
Nov. 30, 1988
Applicant:
Inventors:
Jerre F Lauterbach, Columbus, IN (US);
Nathan Ritchie, Columbus, IN (US);
Richard F Miller, North Vernon, IN (US);
Assignee:
Holset Engineering Company, Inc., Madison, IN (US);
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
F04B / ;
U.S. Cl.
CPC ...
417279 ; 417297 ;
Abstract
A compressor unloaded system for use in compressed air supply systems having reciprocating type air compressor means supplied with atmospheric or turbocharged air is shown. Means are provided to block off the air intake of such compressors, and to maintain back pressure against the exhaust valve of said air compressor during an unloading cycle, thereby preventing operation of the intake and exhaust valves of such compressor, and creating an 'air spring' in the cylinder of such air compressor during an unloading cycle.