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. 20, 2015
Filed:
Jul. 12, 2011
Yuya Izawa, Kariya, JP;
Shinya Yamamoto, Kariya, JP;
Takashi Ban, Kariya, JP;
Takayuki Imai, Kariya, JP;
Katsumi Yamashita, Kariya, JP;
Yasunaka Hanaoka, Kariya, JP;
Yuya Izawa, Kariya, JP;
Shinya Yamamoto, Kariya, JP;
Takashi Ban, Kariya, JP;
Takayuki Imai, Kariya, JP;
Katsumi Yamashita, Kariya, JP;
Yasunaka Hanaoka, Kariya, JP;
Abstract
A roots type fluid machine includes a case having a side wall, a pair of rotary shafts provided in the case, a pair of rotors engaged with each other and fixed to the pair of rotary shafts so as to extend axially, respectively, a suction space formed by the case and the pair of rotors for introducing fluid, a discharge space formed by the case for discharging fluid and the pair of rotors and a transfer chamber formed by the case and the rotor. The rotor has a rotor end surface. A clearance is formed between the side wall and the rotor end surface. The transfer chamber transfers gas introduced in the suction space to the discharge space in accordance with the rotation of the pair of rotors. The case has a guide groove formed in the side wall facing the rotor end surface. Gas leaked from the discharge space into the clearance is introduced to the transfer chamber through the guide groove.