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Class Information
Number: 277/516
Name: Seal for a joint or juncture > Seal between relatively movable parts (i.e., dynamic seal) > Circumferential contact seal for other than piston > Contained or compressed by gland member in packing box > Fluid introducer or director > Spacer between seals (e.g., lantern ring, etc.)
Description: Fluid introduction or director wherein the means is a nonsealing member separating seals.










Patents under this class:
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Patent Number Title Of Patent Date Issued
8181970 Unitized bi-directional seal assembly May. 22, 2012
8136792 Double containment valve system Mar. 20, 2012
8132785 Shaft seal packing and shaft seal structure for valve Mar. 13, 2012
8074999 Dynamic sealing arrangement for movable shaft Dec. 13, 2011
7118114 Dynamic sealing arrangement for movable shaft Oct. 10, 2006
7108058 Packing assembly for rotary drilling swivels and pumps having rotating shafts Sep. 19, 2006
6834862 Shaft sealing system for a rotary mechanical device Dec. 28, 2004
6721381 Seal arrangement for in-core instrument housing Apr. 13, 2004
6522708 Seal arrangement for in-core instrument housing Feb. 18, 2003
6504888 Apparatus and methods of flow measurement for a boiling water reactor internal pump Jan. 7, 2003
6382633 Shaft seal device using gland packing May. 7, 2002
6126171 Sealing cartridge Oct. 3, 2000
6062570 Stem sealing system for broad temperature ranges May. 16, 2000
5979483 Valve assembly and method Nov. 9, 1999
5921554 Anti-pack out seal Jul. 13, 1999
5772218 Uniform compression gland seal assembly Jun. 30, 1998
5730446 Sealing strip suitable for sealing a hem flange Mar. 24, 1998
5647598 Stuffing box seal having braided packings and lip seal rings in combination with a shaft sleeve Jul. 15, 1997
5642892 Gland seal assembly housing Jul. 1, 1997
5636688 Self aligning stuffing box for pumpjack units Jun. 10, 1997
5636849 Translatable bearing stuffing box Jun. 10, 1997
5593166 Low friction packing Jan. 14, 1997
5538080 Self aligning stuffing box for pumpjack units Jul. 23, 1996
5356157 Internal live loading packing gland Oct. 18, 1994
5305854 Stuffing box lubricator Apr. 26, 1994
5290046 Internal live loading packing gland Mar. 1, 1994
5230498 Live load packing system Jul. 27, 1993
5171022 Shaft seal of a mixing and kneading machine Dec. 15, 1992
5129625 Live load packing system Jul. 14, 1992
5056757 Packing containment for live loaded fugitive emission seals Oct. 15, 1991
5024453 Liveload assembly for rotary or reciprocating shaft packing Jun. 18, 1991
5014998 Shaft seal May. 14, 1991
5013053 Universal seal cage lantern ring with double-sided slotted land structure May. 7, 1991
4981174 Leakproof stuffing box with external lubrication for polish rod Jan. 1, 1991
4886241 Valve stem packing containment for high pressure, high temperature Dec. 12, 1989
4844479 Structure of a gland packing box Jul. 4, 1989
4737087 Drive shaft seal for gear pump and method Apr. 12, 1988
4647050 Stuffing box for a sucker rod pump assembly Mar. 3, 1987
4613140 Self-aligning lubricating stuffing box Sep. 23, 1986
4572519 Packing assembly for use in a plunger bore Feb. 25, 1986
4498681 Universal seal cage lantern ring with channels and fluid slots Feb. 12, 1985
4480842 Self-aligning stuffing box Nov. 6, 1984
4478423 Oil seal and unitized seal carrier for reciprocating shaft Oct. 23, 1984
4475735 System for sealing shafts against solid containing gaseous media Oct. 9, 1984
4384726 Expandable lubricating packing assembly for wellheads May. 24, 1983
4379557 Valve stem packing structure Apr. 12, 1983
4353388 Butterfly valve Oct. 12, 1982
4351531 Sealing arrangement for a piston pump Sep. 28, 1982
4323252 Gland seal system for use with a methanation reactor Apr. 6, 1982
4301893 Lantern rings Nov. 24, 1981

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