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:
Oct. 04, 2016
Filed:
May. 16, 2012
Hideaki Yokota, Hyogo, JP;
Keitaro Yonezawa, Hyogo, JP;
Hideaki Yokota, Hyogo, JP;
Keitaro Yonezawa, Hyogo, JP;
KOSMEK LTD., , JP;
Abstract
A first piston () is inserted in a housing () so as to be hermetically movable vertically. A second piston () is inserted in a cylindrical hole () of the first piston () so as to be hermetically movable axially, and has an output rod () projecting upward from the housing (). A lock chamber () is formed below the first piston () and the second piston (), and a release chamber () is formed above the first piston () and the second piston (). A force multiplier () is arranged in the housing () so as to cause (i) a first force, with which a pressurized fluid supplied into the lock chamber () pushes the first piston () upward, to be transformed in a force-multiplying manner into a second force and (ii) the second force to be transmitted to the second piston (). Further, a change-over mechanism () is arranged in the housing () so as to selectively couple the first piston () to the housing () or the second piston ().