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:
Sep. 26, 2000
Filed:
Aug. 18, 1998
Tamotsu Nakamura, Saitama, JP;
Showa Corporation, Saitama, JP;
Abstract
A tilt lock device 10 comprises a piston 13 having a piston rod 14, an inner cylinder 12 defining the piston 13 into an upper oil chamber S1 and a lower oil chamber S2, and an outer cylinder 11 surrounding the inner cylinder 12. A communication passage 34 is formed in the piston 13 for bringing the upper and lower oil chambers S1 and S2 into communication with each other, and an on-off valve 15 capable of being operated from outside is disposed in the communication passage 34 for preventing oil from flowing from the lower oil passage S2 into the upper oil passage S1, and for also serving as a shock absorbing valve which allows oil to flow from the upper oil chamber S1 to the lower oil chamber S2 when a pressure in the upper oil chamber S1 exceeds a set pressure so as to absorb a shock. An accumulator chamber S3 is formed between the outer and inner cylinders 11 and 12 for also serving as a volume compensation chamber which controls the volume of the oil going in and out through the lower oil chamber S2 following in-and-out movement of the piston rod 14.