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. 30, 2007
Filed:
Aug. 25, 2004
Masaaki Uchiyama, Tokyo-to, JP;
Nobuyuki Ichimaru, Yokohama, JP;
Masaaki Uchiyama, Tokyo-to, JP;
Nobuyuki Ichimaru, Yokohama, JP;
Kabushiki Kaisha Hitachi Seisakusho, Tokyo, JP;
Abstract
The pistonis constituted so as to rotate relative to the first cylinderwhile moving relative to the first cylinderin the axial direction when fluid is supplied to and discharged from the interior of the first cylinder, and the pistonis constituted to be incapable of rotation relative to the second cylinder, but capable of movement relative to the second cylinderin the axial direction. Hence when fluid is supplied to and discharged from the interior of the first cylinder, the pistonis caused to rotate relative to the first cylinderwhile moving relative to the first cylinderin the axial direction, and the pistonis caused to move relative to the second cylinderin the axial direction but prevented from rotating relative to the second cylinderAs a result, torsional elasticity is generated in shaft portionsand