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:
Jul. 20, 2004
Filed:
Jun. 11, 2002
Applicant:
Inventors:
Assignee:
Aisan Kogyo Kabushiki Kaisha, Aichi-Ken, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
F16L 7/00 ;
U.S. Cl.
CPC ...
F16L 7/00 ;
Abstract
In a gas valve including a valve body having an annular seal surface, of which an axis is disposed to extend in a vertical direction, and of which seal surface a diameter becomes larger toward a lower end of the seal surface, to prevent water drops on the seal surface made by condensation from freezing and to prevent the seal surface from being fixed to a seat because of the freezing, a liquid repellent film is provided on the seal surface of the valve body.