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Class Information
Number: 277/520
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 > Particular gland feature
Description: Seal for the gland and packing box wherein the member that substantially closes the open end of the packing box while having an opening for passage for one of the relatively movable parts has a specific characteristic.










Sub-classes under this class:

Class Number Class Name Patents
277/526 Externally threaded 17
277/524 Eye or t-type bolt 6
277/525 Internally threaded 5
277/521 Segmented 7
277/522 Spring bias 35


Patents under this class:
1 2

Patent Number Title Of Patent Date Issued
8622367 Low friction live-loaded packing Jan. 7, 2014
8500091 Opening and closing valve including a packing gland and a yolk sleeve Aug. 6, 2013
8317201 Device for a rotating gland seal Nov. 27, 2012
8196802 Seal device and method for assembling a guide block in a gland of the seal device Jun. 12, 2012
7980530 Packing nut for control valve Jul. 19, 2011
7861771 Rod pump stuffing box Jan. 4, 2011
7178806 Cinchpac self-loading rotary shaft seal Feb. 20, 2007
7036824 Device for the float mounting a sealed housing May. 2, 2006
6871857 Mechanical sealing apparatus Mar. 29, 2005
6698764 Packing assembly Mar. 2, 2004
6640823 Fitting Nov. 4, 2003
6578850 Dynamic seal for a drive shaft Jun. 17, 2003
6561517 Packing device for rotary valves May. 13, 2003
6412783 Self aligning stuffing box for pumpjacks Jul. 2, 2002
6382940 High pressure plunger pump housing and packing May. 7, 2002
6357756 Balance shaft seal clamp Mar. 19, 2002
6354597 Sealed rotating connection device allowing great motions Mar. 12, 2002
6328312 Shaft seal assembly Dec. 11, 2001
6231048 Mechanical seal incorporating a pusher ring for safe and easy assembly and repair May. 15, 2001
5772218 Uniform compression gland seal assembly Jun. 30, 1998
5513556 Packing gland construction May. 7, 1996
5372352 Apparatus for sealing a fluid carrying device Dec. 13, 1994
5267736 Sealing apparatus for rotating shafts, in particular stern tube seal for the propeller shaft of a ship Dec. 7, 1993
5267533 Self-adjusting packing gland for sootblower Dec. 7, 1993
5209497 Sealing apparatus for rotating shafts, in particular stern tube seal for the propeller shafts of a ship May. 11, 1993
5209496 Universal seal or packing gland May. 11, 1993
5129625 Live load packing system Jul. 14, 1992
5129624 Valve stem sealing means for prevention of fugitive emissions Jul. 14, 1992
5058668 Rod guide bearing assembly for oil well pumping apparatus Oct. 22, 1991
4936592 Tightening arrangement for packing rings of a packing box Jun. 26, 1990
4878815 High pressure reciprocating pump apparatus Nov. 7, 1989
4844479 Structure of a gland packing box Jul. 4, 1989
4832352 Piston rod seal May. 23, 1989
4795171 Self-pressurized shaft or closure seal Jan. 3, 1989
4745944 Self-cleaning, fluid pressure biased gate valve May. 24, 1988
4745938 Outside seal and yoke valve May. 24, 1988
4712772 Power hydraulic gear Dec. 15, 1987
4661044 Pump having a bushing removal mechanism Apr. 28, 1987
4630629 Valve with compressible valve stem and valve body seals Dec. 23, 1986
4600032 Rotary shaft seal assembly Jul. 15, 1986
4577873 Dual valve stem packing arrangement Mar. 25, 1986
4512550 Sealing means for valve spindle Apr. 23, 1985
4468039 Packing ring cartridge with adjusting screws Aug. 28, 1984
4411438 Packing gland Oct. 25, 1983
4408769 Stuffing box with outer flexible tube to allow shaft gyratory movements Oct. 11, 1983
4407510 Adjustable packing gland assembly for movable blade damper Oct. 4, 1983
4362305 Pump sealing device Dec. 7, 1982
4360186 Swivel joint Nov. 23, 1982
4356832 High pressure bonnetless valve Nov. 2, 1982
4351512 Valve with yoke and captive gland wrench Sep. 28, 1982

1 2










 
 
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