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:
May. 19, 1987
Filed:
Feb. 06, 1985
Applicant:
Inventors:
Toshiaki Okamoto, Okazaki, JP;
Masahiro Fukuta, Nagoya, JP;
Assignee:
Aisin Seiki Kabushiki Kaisha, Aichi, JP;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
F04C / ;
U.S. Cl.
CPC ...
418201 ; 418206 ;
Abstract
A Roots type blower is disclosed having rotors with twisted-shape and projections on the pitch circle. The blower is compact in the axial direction, because the projections work as gearing between the rotors. Therefor, it is not necessary to provide additional gears for driving the rotors. Each of the rotors has a twisted-shape with a relationship of n.times..theta..gtoreq.2.pi., where n is the number of leaves and .theta. is the lead angle.