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.:

US 6581721 B1

PDF
Full Text
Expired
Date of Patent:
Jun. 24, 2003

Filed:

Sep. 20, 2001
Applicant:
Inventors:

Tadashi Nagai, Tokyo, JP;

Kai Shiraishi, Tokyo, JP;

Assignee:
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
F01N 1/00 ; F16K 1/700 ;
U.S. Cl.
CPC ...
F01N 1/00 ; F16K 1/700 ;
Abstract

A valve for a control muffler includes: a valve element which is swingably journaled on a support shaft supported by shaft holes of a pair of first shaft supporting portions inside the support shaft ; bushes which are respectively interposed between the support shaft and a pair of second shaft supporting portions that are disposed on the valve element to pivotally support the support shaft ; and a coil spring which urges the valve element in a valve closing direction. In the valve, a welding rising portion which protrudes in the axial direction is disposed on an outer opening edge of the shaft hole of each of the pair of first shaft supporting portions and the support shaft is welded to tip ends of the welding rising portion


Find Patent Forward Citations

Nagai, Tadashi. (2003). Valve for a control muffler (U.S. Patent No. 6581721). U.S. Patent and Trademark Office. https://idiyas.com/patent/badge/6581721

Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile

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