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:
Jun. 17, 2008
Filed:
Dec. 05, 2006
Hiroshi Kobata, Sagamihara, JP;
Rollin C. Christianson, Delafield, WI (US);
Christopher John Kolbe, Muskego, WI (US);
Hiroshi Kobata, Sagamihara, JP;
Rollin C. Christianson, Delafield, WI (US);
Christopher John Kolbe, Muskego, WI (US);
HUSCO International, Inc., Waukesha, WI (US);
Kayaba Industry Company, Ltd., Tokyo, JP;
Abstract
Cushion chambers () disposed in the vicinity of both ends of a hydraulic cylinder () to throttle inflow or outflow of an operating oil caused by a piston () moving close to a piston stroke end, pressure sensors () to detect pressures in the cushion chambers (), and a control valve () disposed in a passage to supply/drain the operating oil to and from oil chambers () of the hydraulic cylinder () for varying a flow amount of the operating oil are provided. A controller () varies an opening degree of the control valve () within a piston stroke end range based upon outputs of the pressure sensors (), adjusts a cushion pressure and controls a moving speed of the piston (). Thereby deceleration degrees of the piston () can be freely adjusted within the piston stroke end range based upon a change of the operating conditions of the hydraulic cylinder ().