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. 01, 1976
Filed:
Aug. 01, 1974
Applicant:
Inventor:
Michael E Hargrave, Union Grove Lake, IA (US);
Assignee:
Fisher Controls Company, Marshalltown, IA (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
F16K / ;
U.S. Cl.
CPC ...
251210 ; 251332 ;
Abstract
A tight shutoff valve seal is disclosed, wherein an easily deformable annular valve seal member is retained within an annular groove in a valve element. Protecting this seal member from erosion or damage by a fluid flowing therepast is a slidable seal retaining member which additionally retains the seal member within the groove. The retaining member is resiliently urged to a seal-protecting position when a valve employing this seal is opened, and when the valve is closed the retaining member slides on a surface of the seal member and on a surface of the valve element to allow the seal member to abut and seal against a valve seating surface.