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. 29, 1987
Filed:
Jun. 24, 1986
Shinji Hamanaga, Hamamatsu, JP;
Abstract
In construction of a valve shifting mechanism for a brass instrument in which tube length is changed by selectively moving a piston tube in a valve casing against a spring, a valve guide made of synthetic resin is fixed, in sliding engagement with the valve casing, to a valve rod seat fixed to the piston tube by means of a piston rod screwed at one end into the piston rod seat for reduced generation of harsh noises when the valve is shifted and to simplify assemblage of the valve. An elongated slot is formed in the valve guide extending in the radial direction of the piston tube so as to permit a fixed size valve guide to be used with valve casings of different sizes.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile