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:
Mar. 28, 2000
Filed:
Mar. 26, 1998
Tamotsu Nakamura, Saitama, JP;
Showa Corporation, Saitama, JP;
Abstract
The present invention provides a tilt-trim device for a marine propulsion unit comprising a hydraulic cylinder device where a hydraulic fluid is filled in a cylinder formed in a cylinder housing and a buffer piston connected to one end of a piston rod is provided slidably so as to divide the inside of the cylinder into a piston side space and a rod side space, a boosting housing provided slidably at the outer periphery of the cylinder housing for forming a boosting space with the cylinder housing, capable of contacting the piston rod, and a hydraulic fluid supplying and exhausting device provided integrally with the cylinder housing, for supplying the hydraulic fluid alternatively to the piston side space and the boosting space or the rod side space for projecting or storing the piston rod from or to the cylinder housing, where the boosting housing contacts the piston rod by the supply of the hydraulic fluid from the hydraulic fluid supplying and exhausting device to the boosting space for applying the pressure in the projecting direction on the piston rod, wherein a boosting path for communicating the hydraulic fluid supplying and exhausting device and the boosting space is formed inside the cylinder housing.