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:
Mar. 01, 1994
Filed:
Mar. 04, 1993
William A Ridge, Inman, KS (US);
Cashco, Inc., Ellsworth, KS (US);
Abstract
A multiple thrust range, live loaded packing system for stems and shafts extending into a packing chamber containing a packing ring, and a packing gland engaging the ring and having an outer end portion projecting outwardly of the chamber includes a first thrust member engaging an outer end portion of the gland and a second thrust member spaced from and facing the first thrust member. A spring is mounted between the thrust members for normally biasing the thrust members apart and a spacer is mounted between the thrust members around the spring for establishing a minimum spacing distance between the thrust members. One or more tension members extend between the thrust members to secure the thrust members against the spacer for exerting a selected live load on the packing gland via the spacer, the spring and the first thrust member. At least one of the thrust members has a plurality of opposite stop surfaces selectively engageable with the spacer to provide different thrust range values of live loading depending on which stop surface is engaged with the spacer.