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:
Jan. 08, 2013
Filed:
Aug. 07, 2008
Harunori Miyamura, Osaka, JP;
Tadashi Okada, Osaka, JP;
Takayuki Takahashi, Osaka, JP;
Kaname Ohtsuka, Osaka, JP;
Toshihiro Susa, Osaka, JP;
Hiromichi Ueno, Osaka, JP;
Takanori Murono, Osaka, JP;
Harunori Miyamura, Osaka, JP;
Tadashi Okada, Osaka, JP;
Takayuki Takahashi, Osaka, JP;
Kaname Ohtsuka, Osaka, JP;
Toshihiro Susa, Osaka, JP;
Hiromichi Ueno, Osaka, JP;
Takanori Murono, Osaka, JP;
Daikin Industries, Ltd., Osaka, JP;
Abstract
In a single screw compressor, gates () of gate rotors () are to be engaged with spiral grooves () of a screw rotor (). In each spiral groove () of the screw rotor (), an area extending from a start point of the spiral groove () to a position in a compression stroke is a suction-side portion (), and the remaining portion (portion up to a terminal point of the spiral groove ()) is a discharge-side portion (). In the discharge-side portion (), a clearance between a wall surface () therein and the gate () is substantially '0 (zero).' A clearance between the wall surface () in the suction-side portion () and the gate () is wider than that between the wall surface () in the discharge-side portion () and the gate (), and is gradually narrowed from the start point toward the terminal point in the spiral groove ().