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:
Apr. 07, 2009
Filed:
Jan. 14, 2005
Applicants:
Kevin P. Martin, Boston, NY (US);
Nelson R. Timm, Darien, NY (US);
Inventors:
Kevin P. Martin, Boston, NY (US);
Nelson R. Timm, Darien, NY (US);
Assignee:
Flow-Safe, Inc., Orchard Park, NY (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
F16K 21/10 (2006.01); F16K 41/00 (2006.01);
U.S. Cl.
CPC ...
Abstract
A safety relief valve provides for the equalization of backpressure across a valve spindle by providing for flow of fluid between equal sized upper and lower surfaces of the spindle in order to render the valve set point independent of backpressure, such that opening characteristics are controlled solely by the setting of the valve control spring. A seal preferably formed of TEFLON® is provided to prevent the escape of fluid from the valve body, which would otherwise adversely affect the pressure balance between the upper and lower surfaces.