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:
Jul. 22, 2014
Filed:
Mar. 31, 2010
Takayuki Hirano, Aichi-ken, JP;
Kazuho Yamada, Aichi-ken, JP;
Masato Sowa, Kariya, JP;
Toshiro Fujii, Kariya, JP;
Tsutomu Nasuda, Kariya, JP;
Katsutoshi Shiromaru, Kariya, JP;
Fumihiro Suzuki, Kariya, JP;
Takayuki Hirano, Aichi-ken, JP;
Kazuho Yamada, Aichi-ken, JP;
Masato Sowa, Kariya, JP;
Toshiro Fujii, Kariya, JP;
Tsutomu Nasuda, Kariya, JP;
Katsutoshi Shiromaru, Kariya, JP;
Fumihiro Suzuki, Kariya, JP;
Abstract
A roots type fluid machine includes suction and discharge ports, rotary shafts and a pair of rotors. The rotor has a number n of lobe and valley portions with apex and bottom ends. The lobe portions are located on imaginary lines extending radially from an axis of the rotary shaft. The outer surface of each one of the rotors is generated by rotating an outline of the rotor including an arc and involute and envelope curves around and moving the outline in the direction of the axis. The arc has a radius R and a center located on the imaginary line. The involute curve is formed by an imaginary base circle having a radius r and a center located on the axis. The envelope curve is formed by an arc having a radius R. The number n is four or more. A torsional angle β is over 360/n degrees.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile