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:
Nov. 02, 2004
Filed:
Mar. 20, 2003
Applicant:
Inventor:
Yoram Ringer, Providence, RI (US);
Assignee:
Grinnell Corporation, Westminster, MA (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
A62C 3/500 ;
U.S. Cl.
CPC ...
A62C 3/500 ;
Abstract
A differential-type dry pipe valve for a fire protection sprinkler system has a ratio of effective air sealing area to service water sealing area that is smaller than a ratio of service water pressure to system air pressure at which the fire protection sprinkler system is actuated.