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:
Dec. 09, 2003
Filed:
Mar. 07, 2002
Hideyuki Kimura, Kanagawa-ken, JP;
Atsushi Unami, Kanagawa-ken, JP;
Anest Iwata Corporation, Tokyo, JP;
Abstract
The present invention has an object of offering a scroll fluid machine having a multi-stage compressing part which is characterized in that volumes of a sealed spaces is less scattering thereof corresponding to the given angle rotational amount of the revolving scroll driving shaft. In a scroll fluid machine having a multi-stage compressing part which further compresses fluid, which have been compressed by a front stage compressing part and cooled, with a back-stage compressing part, a scroll fluid machine having a multi-stage compressing part which is characterized in that a reduction ratio &Dgr;Y of a volume of a compression chamber is smaller in a back compressing part than in a front compressing part, &Dgr;Y being expressed by &Dgr;Y={A(n−1)−An}/A(n−1), where A is the volume of a compression chamber defined by a scroll wrap and a scroll mirror plane, A(n−1) is the volume of a compression chamber at the rotational angle &Dgr;&ohgr;(n−1), An is the volume of a compression chamber at the rotational angle &Dgr;&ohgr;n and &Dgr;&ohgr; is the rotational angle of the driving shaft of a revolving scroll.