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:
Sep. 26, 2006
Filed:
Sep. 24, 2004
Nobutoshi Orita, Shinjuku-ku, JP;
Nobutoshi Orita, Shinjuku-ku, JP;
Tok Bearing Co., Ltd., Tokyo, JP;
Abstract
An adequate rotation angle is ensured and any member is not damaged due to fluid resistance even with use of highly viscous fluid. A rotating shaft () is provided inside a casing () having first divider walls () provided on its inner periphery and in direct or indirect contact with the rotating shaft. Second divider walls () are provided on an outer periphery of the rotating shaft and in either direct or indirect contact with the casing. A flow passage () is provided in the second divider wall for fluid communication between the pressure chambers. A check valve mechanism has curving portions () moving on and along the periphery of the rotating shaft and valving portions () each joining to the curving portion. The curving portion is supported between the rotating shaft and the first divider wall. The flow passage is opened/closed depending upon a direction of fluid flow.