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:
Feb. 13, 1990
Filed:
Apr. 07, 1988
Applicant:
Inventor:
George W Stamp, Hartlepool, GB;
Assignee:
Davy McKee (Stockton) Limited, Stockton-on-Tees, GB;
Primary Examiner:
Int. Cl.
CPC ...
F16K / ;
U.S. Cl.
CPC ...
251 58 ; 251 75 ; 251229 ; 251279 ; 251299 ; 7447 / ; 74470 ;
Abstract
A valve assembly has a valve lid assembly which can be fitted in sealing relation on a valve seat, an over-center device can serve to force the lid on to the seat; a drive shaft connected to the lid assembly and drive means for rotating the shaft to open and close the valve seat, the over-center device serving to oppose rotation of the shaft up to a critical position whereupon the device assists in rotation of the shaft to open the valve seat.