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:
Sep. 17, 1991
Filed:
Jan. 18, 1990
Takahisa Hirano, Aichi Pref., JP;
Mitsubishi Jukogyo Kabushiki Kaisha, Tokyo, JP;
Abstract
A compressor, e.g., a scroll type compressor for a heat pump including a bypass passage by way of which the high pressure side of the compressor is communicated with a compression chamber in which a compression stroke is carried out is disclosed. The compressor further includes opening/closing means so that when it is required that the compressor is operated at a high efficiency, the bypass passage is closed and when it is required that the compressor is operated with a high level of ability, the bypass passage is opened so as to allow high pressure gas to be introduced into the compression chamber in which a compression stroke is carried out whereby the gas is compressed again.