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:
May. 09, 2006
Filed:
Jul. 02, 2003
Hideki Sekiguchi, Tokyo, JP;
Manabu Yoshida, Tokyo, JP;
Hideki Sekiguchi, Tokyo, JP;
Manabu Yoshida, Tokyo, JP;
Kayaba Industry Co., Ltd., Tokyo, JP;
Abstract
A hydraulic motor is equipped with an output shaft (), a cylinder () arranged around the output shaft and receiving a plurality of pistons () expanding with the fluid pressure, a diagonal plate () that contacts the plurality of the expanding pistons (), thereby to exert rotational force to the cylinder (), a brake disc () disposed outside the cylinder () to rotate together therewith, a motor casing () receiving the cylinder () and the brake disc (), a brake driving device () that presses an outer periphery of the brake disc () on an inner peripheral surface of the motor casing () to brake the brake disc. A first chamber () and a second chamber () are defined in the motor casing () by the brake disc () and a communicating passage () formed bypassing the brake disc () communicates the first chamber) with the second chamber (). Since the pressure difference between the first chamber () and the second chamber () is prevented due to the communicating passage (), the friction resistance does not occur at the brake disc () when the braking is released.