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. 24, 1987
Filed:
Jul. 13, 1984
Seiko Seiki Kabushiki Kaisha, both of, JP;
Nihon Radiator Co., Ltd., both of, JP;
Abstract
A rotary vane-type gas compressor for use in car coolers and the like has a plurality of intake ports for each compression working chamber located at positions shifted from one another in the revolving direction of a rotor. At least one intake port which is located at the most forward position in the revolving direction of the rotor has a throttle valve which is controlled in response to the flow rate of suctioned gas, and the opening degree of the throttle valve is changed as the revolution speed of the rotor increases and creates a higher flow rate of suctioned gas. This reduces the effective compression working chamber volume, i.e., the volume which results when one vane has passed the position of the corresponding intake port to enclose gas in the compression working chamber. By such a construction, it is possible to restrain a substantial increase in both the amount of compressed gas to be discharged and the air-cooling capacity, even when the revolution speed of the rotor increases above 2000 rpm.