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:
Jan. 30, 1979
Filed:
Nov. 07, 1977
Byron L Brucken, Miamisburg, OH (US);
General Motors Corporation, Detroit, MI (US);
Abstract
A reciprocating vane rotary compressor for an automotive air conditioning system wherein the compressor capacity may be varied in response to the evaporator pressure or temperature such that the evaporator pumps only the amount of refrigerant required at moderate ambient temperatures. The compressor has a circumferentially adjustable modulation ring mounted in concentric relation with the internal compressor chamber surface. The ring, having by-pass port means, may be advanced in the direction of rotation of the rotor, with the port means operative to delay the time that the chamber goes under compression. By varying the induction cut-off point of the ring by-pass port means, the compressor chamber undergoing pre-compression returns gas via a suction transfer passage in the housing to the compressor suction cavity. The compressor rotor is mounted on a unique overhanging stub shaft arrangement to provide a simplified single journal bearing location for the rotor.