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. 17, 1979
Filed:
May. 25, 1977
Applicant:
Inventors:
John K McGee, Houston, TX (US);
Floyd J Lane, Houston, TX (US);
Assignee:
Combustion Engineering, Inc., Windsor, CT (US);
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
F16K / ;
U.S. Cl.
CPC ...
137315 ; 251214 ; 251330 ; 277-9 ;
Abstract
A non-rising valve stem is provided with a shoulder that, in normal opening and closing of the valve, remains free of a complementary seat formed inside the valve bonnet. Should the valve stem packing in the bonnet begin to leak while the valve is open and under pressure, the bonnet packing gland may be backed out a few turns to effect a seal between the shoulder and seat. Then a disassembly, packing change, reassembly and testing may be effected.