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:
Jul. 17, 2001
Filed:
Nov. 27, 1998
Daijiro Nakamura, Ono-shi, Hyougo Prefecture, 675-13, JP;
Other;
Abstract
A clamping screw for holding a tool to a threaded shaft is provided with a body member having a threaded surface for engagement with the threaded shaft. A flange ring is disposed about the body member and clampingly engages the tool when the body is threaded onto the shaft in engagement with the tool. An operating ring is rotatably disposed about the body member and retained from movement axially away from the flange ring. A torque increasing mechanism is operatively disposed about the body member between the operating ring and the flange ring and is configured to transmit torque from the operating ring to the body member. The torque increasing mechanism includes a first inclined cam surface disposed on the operating ring, a cam ring axially movably disposed but rotationally fixed about the body member, a second inclined cam surface disposed on the cam ring opposite to and corresponding to the first inclined surface, and a bearing supported on a retainer and disposed between the first inclined cam surface and the second inclined cam surface. The operating ring is rotatable with respect to the cam ring so that rotation of the operating ring applies torque and axial force to the cam ring through the bearing. A spring is operatively disposed between the cam ring and the operating ring and biases the cam ring toward an initial position with respect to the operating ring.