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:
Aug. 28, 1984
Filed:
Dec. 05, 1983
Tri C Le, Missouri City, TX (US);
Danny S Meyer, Richmond, TX (US);
John B Williams, Houston, TX (US);
ACF Industries, Incorporated, New York, NY (US);
Abstract
A pressure energizable packing assembly (47) for sealing the stem and valve body of a high pressure valve. The assembly comprises one or more sets (60, 61) of packing rings (62) which are adapted to be compressed between a pair of retainer rings (64, 65) and radially expanded into sealing engagement with the valve stem (45) and valve body (11). The retainer rings are actuated by Belleville springs (70) in a preloaded condition of the assembly and additionally by fluid pressure in the valve body after installation. The packing assembly includes an adapter ring plug (71) for accommodating its connection in the valve body. The packing assembly is assembled as a cartridge and held together by screws (77) which extend through the adapter ring (71), the outer retainer ring (64), the packing ring sets (60, 61) and their separating spacer ring (63), and which are anchored in the inner retainer ring (65). The screws can be adjustably tightened to place the cartridge in a desired preloaded condition after installation in a packing chamber (46a, 46b). The packing assembly is adapted for use as a cartridge in packing chambers without concern for the effect of tolerance 'stack-up' in the axial dimension and without adjustment in the number of Belleville springs.