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:
Jun. 14, 2005
Filed:
Jul. 25, 2001
Takeshi Kouno, Ushiku, JP;
Hirokatsu Kohsokabe, Minori, JP;
Isao Hayase, Tsuchiura, JP;
Kenichi Oshima, Iwafune, JP;
Akihiko Ishiyama, Oohira, JP;
Takeshi Kouno, Ushiku, JP;
Hirokatsu Kohsokabe, Minori, JP;
Isao Hayase, Tsuchiura, JP;
Kenichi Oshima, Iwafune, JP;
Akihiko Ishiyama, Oohira, JP;
Hitachi, Ltd., Tokyo, JP;
Abstract
A compressor includes a compression chamber for compressing working fluid within an inside thereof, a discharge port, through which the working fluid flows out from the compression chamber, and a discharge valve for opening or closing the discharge port. The discharge valve includes a valve seat portion provided in the discharge port and having a tapered surface, so that a cross-section area of the discharge port comes to be large from a side of the compression chamber. The valve has a projection portion having a tapered surface in contact with the tapered surface of the valve seat portion. A spring is provided on a member formed in one body with the valve seat portion, for positioning the valve to the valve seat portion, wherein clearance volume of the discharge port is reduced, so as to improve the performances thereof.