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. 27, 1988
Filed:
Dec. 23, 1987
Applicant:
Inventors:
Shigeru Machida, Ibaraki, JP;
Katsumi Matsubara, Ushiku, JP;
Toshio Kushiro, Kawanishi, JP;
Makoto Uenishi, Nishinomiya, JP;
Kazuaki Miyazaki, Hyogo, JP;
Assignees:
Hitachi, Ltd., Tokyo, JP;
Shin Meiwa Industry Co., Ltd., Tokyo, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
F04C / ; F04C / ;
U.S. Cl.
CPC ...
418 55 ; 418 83 ; 418150 ;
Abstract
A scroll type pump has a fixed scroll and an orbiting scroll engaging therewith, wherein a curve of a wrap of either of the scrolls is offset inwardly or outwardly relative to a set curve so as to prevent formation of a gap between the wraps due to thermal expansion of the scroll wraps.