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. 16, 2000
Filed:
Aug. 18, 1998
Applicant:
Inventor:
Tamotsu Nakamura, Saitama, JP;
Assignee:
Showa Corporation, Saitama, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
B63H / ;
U.S. Cl.
CPC ...
440 61 ; 440 55 ;
Abstract
A tilt lock device 10 comprises a cylinder 12, a piston 13 vertically slidably inserted into the cylinder 12, a piston rod 14 connected to an upper portion of the piston 3, upper and lower oil chambers S1 and S2 respectively formed in upper and lower portions of the piston 13, an accumulator chamber S3 mounted to the cylinder 12 in a manner to surround the cylinder 12 and being in communication with the upper and lower oil chambers S1 and S2 through upper and lower oil passages 45 and 12a. A first relief valve 18 is provided in the upper oil passage 45 and is opened when a pressure in the upper oil chamber S1 in which the piston 13 rises exceeds a predetermined value.