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:
Oct. 28, 2008
Filed:
Dec. 27, 2005
Takeshi Tsuchiya, Tokyo, JP;
Yuuichi Yanagase, Tokyo, JP;
Kazuyuki Fujimura, Tokyo, JP;
Mutsunori Matsunaga, Shizuoka, JP;
Shigekazu Nozawa, Shizuoka, JP;
Kenji Tojo, Shizuoka, JP;
Haruo Koharagi, Tokyo, JP;
Satoshi Kikuchi, Tokyo, JP;
Hirokatsu Kohsokabe, Tokyo, JP;
Takeshi Tsuchiya, Tokyo, JP;
Yuuichi Yanagase, Tokyo, JP;
Kazuyuki Fujimura, Tokyo, JP;
Mutsunori Matsunaga, Shizuoka, JP;
Shigekazu Nozawa, Shizuoka, JP;
Kenji Tojo, Shizuoka, JP;
Haruo Koharagi, Tokyo, JP;
Satoshi Kikuchi, Tokyo, JP;
Hirokatsu Kohsokabe, Tokyo, JP;
Hitachi Appliances, Inc., Tokyo, JP;
Abstract
In order to make a displacement type compressor be able to reliably start without increasing an outside diameter dimension of the compressor while using a self-start synchronous motor having high energy efficiency, the displacement type compressor according to the invention includes the self-start synchronous motor which starts as an induction-motor and performs synchronous operation by performing synchronization pull-in almost at a synchronous rotational frequency, a compression part having a compression chamber which compresses a working fluid, and a hermetic container which houses the self-start synchronous motor and the compression part. The displacement type compressor is provided with a start load reducing means which reduces a load of the compression part at startup and is-placed at the compression part in the hermetic container.