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. 10, 1986
Filed:
Jan. 17, 1983
Applicant:
Inventor:
Michael D West, Arlington Heights, IL (US);
Assignee:
International Telephone and Telegraph Corporation, New York, NY (US);
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
F16K / ;
U.S. Cl.
CPC ...
251243 ; 251 11 ; 251291 ; 267 58 ; 236 / ;
Abstract
A zone valve of the type using a heat motor includes a biasing spring that operates on a lever, the lever operating on a valve. The spring includes arms that slidingly engage the lever. The arms each include a bent portion adjacent the point of contact with the lever. By providing the bent portion on each arm, the effective biasing force produced on the lever is decreased when the lever is in a raised position.
West, Michael. (1986). Zone control valve (U.S. Patent No. 4593882). U.S. Patent and Trademark Office. https://idiyas.com/patent/badge/4593882
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile