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:
Jun. 12, 1990
Filed:
Feb. 16, 1989
Masatoshi Watanabe, Seki-City, Gifu-Pref., 501-32, JP;
Shinichi Hayakawa, Seki-City, Gifu-Pref., 501-32, JP;
Shiro Tsuji, Mino-City, Gifu-Pref., 501-37, JP;
Yasuyuki Sumigama, Seki-City, Gifu-Pref., 501-32, JP;
Naotake Okada, Seki-City, Gifu-Pref., 501-32, JP;
Genko Kitamura, Seki-City, Gifu-Pref., 501-32, JP;
Other;
Abstract
This invention relates to a screw stopper including an anti-freeze device used for water pipe valve and fitted to the lower end portion of an open/close movable valve of said water pipe valve comprises: a small perforation penetrated centrally on the lower portion of the said screw stopper; a water-through recess formed on a countersink portion of the said screw stopper; a small movable member including a small valve for opening and closing an aperture of the said small perforation, and said small movable member partially defining an water-through passage; a pair of springs for holding said small movable member, at least of which is made of shape-memory alloy; an outer cylinder for holding said pair of springs screwed and fitted to the said screw stopper; and a packing for sealing up water by a valve seat.