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:
Apr. 16, 2002
Filed:
Nov. 24, 2000
Applicant:
Inventors:
Assignee:
Kabushiki Kaisha Kosmek, Hyogo, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
B23Q 3/08 ;
U.S. Cl.
CPC ...
B23Q 3/08 ;
Abstract
A bolster of a press machine has a T-shaped groove, into which a T-shaped leg of a hydraulic clamp is fitted. The clamp advances and retreats along the T-shaped groove by a pneumatic cylinder. A housing of the clamp has a side surface to which a block is fixed. The block is provided with a hydraulic locking device. When placing the clamp in a waiting condition at a retreated position, a push piston of the locking device is projected downwards from a retracted position. Then the push piston pushes an upper surface of the bolster and the thus resulting reaction force fixes the T-shaped leg to a peripheral wall of the T-shaped groove.