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:
Jan. 22, 1991
Filed:
Jun. 06, 1990
Applicant:
Inventors:
Alan D Bremers, Marshalltown, IA (US);
Melvin L Osgood, Marshalltown, IA (US);
Assignee:
Fisher Controls International, Inc., Clayton, MO (US);
Primary Examiner:
Int. Cl.
CPC ...
H16K / ; G01F / ;
U.S. Cl.
CPC ...
137315 ; 220284 ; 220316 ;
Abstract
A valve assembly includes a bonnet that is captivated in a valve body stem mount by means of a threaded bonnet nut. A pair of opposed pry holes are formed in the bonnet at a point above the top of the fully seated bonnet nut. Loosening of the bonnet nut enables a bonnet that is stuck in the body stem mount to be pried loose with a pry bar inserted in one or both of the pry holes and levered against the top of the bonnet nut. The bonnet holes also provide a visual indication of movement of the bonnet and whether there is pressure in the valve body.