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:
Nov. 24, 1998
Filed:
Jun. 07, 1996
Seiji Kitano, Hachioji, JP;
Hideo Ito, Akishima, JP;
Tsutomu Ishiguro, Hachioji, JP;
Yoshiyuki Tanii, Hamura, JP;
Satoshi Nakagawasai, Tokyo, JP;
Yasuhito Kura, Hino, JP;
Olympus Optical Co., Ltd., Tokyo, JP;
Abstract
A line changeover device for an endoscope, which changes over a line which is arranged in the endoscope, is arranged such that it comprises a cylinder and a piston which is fitted and inserted into the cylinder in a retractable manner, a seal member which is abutted against the cylinder for retaining at least one of water tightness and gas tightness with respect to the cylinder is fixedly provided on an outer periphery of the piston, and a strength reinforcement is provided on at least a part between an outer periphery of said seal member and an inner periphery thereof. The water tightness and the gas tightness within the cylinder are retained or held, and a sliding resistance of the piston is kept appropriately or adequately without the use of lubricating oil. Sliding ability between the cylinder and the piston at the time of operation is improved. Operability can be made fine or satisfactory.