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:
Mar. 11, 2008
Filed:
Aug. 10, 2005
Masahiko Ando, Anjo, JP;
Hideyuki Aoki, Anjo, JP;
Hiroyuki Tsukamoto, Anjo, JP;
Akira Fukatsu, Anjo, JP;
Atsushi Mori, Anjo, JP;
Akira Matsuo, Anjo, JP;
Hideaki Furuta, Anjo, JP;
Masahiko Ando, Anjo, JP;
Hideyuki Aoki, Anjo, JP;
Hiroyuki Tsukamoto, Anjo, JP;
Akira Fukatsu, Anjo, JP;
Atsushi Mori, Anjo, JP;
Akira Matsuo, Anjo, JP;
Hideaki Furuta, Anjo, JP;
Aisin A W Co., Ltd., , JP;
Abstract
A hydraulic power transmission is provided with a frictional engagement element as a lock-up clutch between a hydraulic power transmission chamber, housing a pump impeller and a turbine runner, and a servo oil chamber of the lock-up clutch. A lock-up oil passage that supplies lock-up hydraulic pressure to the servo oil chamber is connected to a hydraulic pressure supply circuit that is used in common with a circulation oil passage that supplies hydraulic pressure for circulation to the hydraulic power transmission chamber. An orifice is disposed in the circulation oil passage. It is thus possible to perform lock-up with different supply pressures. A common oil supply for the lock-up oil passage and the circulation oil passage is provided, for example, by disposing a converting circuit that adapts an oil passage connection to hydraulic transmissions with different types of lock-up clutches.