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. 05, 1992
Filed:
May. 21, 1991
Tsutomu Shirakawa, Kobe, JP;
Kabushiki Kaisha Kosmek, Hyogo, JP;
Abstract
In a hydraulic clamp with a direct operated clamping-member, a piston (13) is so inserted into a cylinder bore (11) formed in an upper portion of a housing (4) as to be slidable in the vertical direction. A peripheral wall (11a) of the cylinder bore (11) is projected downwardly and fixedly secured to a lower portion of the housing (4). An opening (12) is so formed in the lower portion of the peripheral wall (11a) as to face a fixed object (2) such as a metal mould. A clamping actuation oil chamber (15) is formed above the piston (13). A spring accommodation bore (21) is formed upwardly from below in a clamping-member (5) which protrudes downwardly from the piston (13), and an unclamping spring (23) is inserted into the spring accommodation bore (21).