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:
Dec. 30, 2003
Filed:
Oct. 21, 2002
Hsuan-Lung Wu, Taichung City, TW;
Other;
Abstract
A collet assembly includes a collet and a tubular valve sleeve sleeved on a rotary shaft that is disposed within a stationary wall body and which defines a piston-receiving chamber. A piston is disposed movably in the piston-receiving chamber. The valve sleeve is formed with a valve opening therein, a valve chamber extending from the valve opening, a valve inlet in fluid communication with the valve chamber and a fluid injection passage in the stationary wall body, and a valve outlet in fluid communication with the valve chamber and a fluid channel in the shaft. A check valve is mounted in the valve chamber, and is moved to an open position, in which, the valve opening is opened due to injection of a high-pressure hydraulic oil into a clearance through the fluid injection passage, thereby permitting movement of the piston, which, in turn, results in clamping of the collet.