Low friction live-loaded packing

Details Low friction live-loaded packing Low friction live-loaded packing

2011-06-21

2011-06-21

Fristoe, Jr., John K (Department: 3753)

Valves and valve actuation

Mechanical movement actuator

Particularly packed or sealed

Reexamination Certificate

active

07963502

ABSTRACT:
A valve packing assembly for a control valve includes a seal assembly, a loading assembly, and a packing retainer. The seal assembly has a seal component to provide a fluid seal around a valve stem and an anti-extrusion component to substantially prevent extrusion of the seal component about the valve stem. The loading assembly is configured to advantageously provide a predetermined packing stress to the seal assembly that is in the same direction as a process stress applied to the seal assembly by a process fluid, thereby substantially reducing packing friction and packing wear in the control valve assembly.

REFERENCES:
patent: 490107 (1893-01-01), Ferguson
patent: 502252 (1893-07-01), Hanna
patent: 877706 (1908-01-01), Duffy
patent: 1502734 (1924-07-01), Martin
patent: 1576376 (1926-03-01), Sudekum
patent: 1643971 (1927-10-01), Wishart
patent: 2567527 (1951-09-01), Parks
patent: 2765185 (1956-10-01), Mott
patent: 3467357 (1969-09-01), Weise et al.
patent: 3559951 (1971-02-01), Whiteman, Jr.
patent: 4340204 (1982-07-01), Herd
patent: 4451047 (1984-05-01), Herd et al.
patent: 4556076 (1985-12-01), Bridges
patent: 4576385 (1986-03-01), Ungchusri et al.
patent: 4840379 (1989-06-01), Thoman, Jr.
patent: 5131666 (1992-07-01), Hutchens
patent: 5230498 (1993-07-01), Wood
patent: 5593166 (1997-01-01), Lovell et al.
patent: 5788216 (1998-08-01), Pittman et al.
patent: 5799928 (1998-09-01), Siver
patent: 5823540 (1998-10-01), Grabau et al.
patent: 6866244 (2005-03-01), Wears
patent: 6953182 (2005-10-01), Lovell et al.
patent: 2004/0155217 (2004-08-01), Wears
patent: 2007/0040141 (2007-02-01), Mahncke et al.
patent: 1231683 (1999-10-01), None
patent: 1748104 (2006-03-01), None
patent: 0308390 (1989-03-01), None
patent: 0483097 (1992-04-01), None
patent: 0494064 (1992-07-01), None
patent: WO-95/23935 (1995-09-01), None
International Search Report for PCT/US2007/076619, mailed Feb. 28, 2008.
Written Opinion by the International Searching Authority for PCT/US2007/076619, mailed Feb. 28, 2008.
Chinese Office Action for Application No. 200780030762.4 (including translation), dated Apr. 13, 2010.

Affiliated with

Also associated with

Rating

Low friction live-loaded packing does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Low friction live-loaded packing, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Low friction live-loaded packing will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-2619398