Class 277/522 - Spring bias

Subclass of Class 277 - Seal for a joint or juncture
Definition: Particular gland feature including an elastic contrivance
No. of patents: 31
Last issue date: 12/25/2007

Number	Title	Issue Date
7311182	Sealing and guiding packet To make a sealing and guiding packet available to shock dampers in order to minimize or even entirely prevent the negative effects of the so-called stick-slip effect and thus permit greater riding comfort, a sealing and guiding packet is proposed which comprises the...	12/25/2007
7219878	Live loaded packing for valve In accordance with the present invention, there is provided a lie loaded packing assembly for a valve which comprises a valve body defining a passage having a valve stem moveably disposed therein and selectively moveable between open and closed positions. Extending ...	05/22/2007
6994411	Refrigerated merchandising apparatus A refrigerated merchandiser including a display case and a cooling module. The display case includes a plurality of walls defining a cavity and a receptacle. A plurality of vertically spaced shelves are disposed in the cavity extending between the side walls. A disp...	02/07/2006
6796324	Fugitive emission collection device A fugitive emission collection device for acquiring an atmosphere sample around a seal is provided. The emission collection device has a rigid member that forms a low impedance cavity shaped to overlay a seal. The emission collection device has a conduit with an inl...	09/28/2004
6145845	Biased seal assembly for high pressure fluid pump A method and apparatus for biasing a seal assembly in a high pressure fluid pump. In one embodiment, the fluid pump includes a reciprocating plunger, a seal carrier disposed about the plunger, and a seal supported by the seal carrier and sealably engaged ...	11/14/2000
6120006	Valve device A valve device includes a valve stem 2 vertically movably inserted in a packing box 1a; a gland packing 6 interposed between the packing box 1a and the valve stem 2; a packing follower 15 disposed on the gland packing 6; and one or more arched plate sprin...	09/19/2000
6098986	Seal A seal (14) for use between a pair of substantially concentric elements (10 and 11) capable of relative movement with respect to each other, said seal comprising a sealing element (17) having a configuration of a helix wherein the opposed axial faces of t...	08/08/2000
6076831	Switch fitting A switch fitting, in particular a cock, ball cock, flap or likewise, with a switch rod for a switch member, which is rotatably and slightly tiltably guided in a switch shaft bore of a fitting housing and which has a sealing surface which is formed on a co...	06/20/2000
6062570	Stem sealing system for broad temperature ranges A stem seal having first and second wiping members circumjacent a stem is disposed within a bore. A lubricant-bearing ring is disposed about the stem within the bore between the wiping members, under compression therefrom. Projections from the wiping memb...	05/16/2000
5927685	Sealing device for a valve stem of a valve A valve includes a column having an outer end portion defining a threaded bore, an outer mediate portion defining a first receiving recess communicating with the threaded bore, an inner mediate portion defining a passage communicating with the first recei...	07/27/1999
5860633	Valve seal A valve assembly configured to maintain a seal during thermal cycling includes a valve body defining a flow passage, and a fluid control member disposed in the flow passage for controlling the flow of fluid. An actuating shaft is interconnected with the f...	01/19/1999
5634486	Valve assembly with connection between an angularly displaceble member and actuator A coupling member between a valve driver and a valve has a pin extending into the valve driver shaft and a head with a groove receiving the shaft of the valve and a recess accommodating the packing nut thereof. A spring braced between the coupling member ...	06/03/1997
5593166	Low friction packing A two-part, low friction, live loaded packing system for fire safety and low fugitive emission sealing (less than 500 ppm) of a valve stem at operating temperatures up to 450° F. (232° C.). One lower packing ring set around the valve stem has PTFE washe...	01/14/1997
5542681	Graphite packing A fluid valve graphite packing assembly with graphite packing rings and thin PTFE disc rings surrounding an operating valve member. Softer graphite packing rings on the interior are bounded by progressively harder graphite packing rings. A PTFE disc ring ...	08/06/1996
5503406	Assembly for live loading or valve packings A valve having an assembly for live loading of the packings of the valve. The assembly includes a plurality of large belleville disk springs arranged such that the shaft or stem of the valve extends through the center of the belleville springs, with threa...	04/02/1996
5299812	Graphite packing A fluid valve graphite packing assembly with graphite packing rings and thin PTFE disc rings surrounding an operating valve member. Softer graphite packing rings on the interior are bounded by progressively harder graphite packing rings. A PTFE disc ring ...	04/05/1994
5290010	Multiple thrust range live loade packing system for stems, shafts, etc. 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...	03/01/1994
5230498	Live load packing system An improved live load packing system for sealing an operating valve member in a fluid valve A packing follower includes a base and a guide sleeve adapted for slidable engagement on the operating valve member. A series of Belleville disk springs slidably e...	07/27/1993
5209501	Needle packing assembly A needle packing assembly is described comprising an annular seal (1) of ultra-high molecular weight plastics material such as polyethylene. A stepped concentric passage (4) passes through the seal with a shoulder (6). The outer end of the inner wall of t...	05/11/1993
5190264	Adjustable valve packing arrangement A fluid valve includes a packing element surrounding a valve stem extending through the valve body. A packing flange is adjustably supported on the valve body for moving a follower to compress the packing element. A set of disc springs is supported in a c...	03/02/1993
5129625	Live load packing system An improved live load packing system for sealing an operating valve member in a fluid valve. A packing follower includes a base and a guide sleeve with a non-metallic inner liner adapted for slidable engagement on the operating valve member. A series of B...	07/14/1992
5090087	Hub assembly for sootblower A sootblower hub having packing for sealing between a sootblower feed tube and lance tube. A packing gland is used which provides a live loading feature for exerting an axial force on the packing. The packing gland is comprised of elements which can be se...	02/25/1992
5064167	Adjustable packing assembly for valve stem A ball valve (10) has a stem (36) and a packing (82) about the stem (36). A spring (85) comprises a plurality of Belleville washers (86) biased between the upper cover plate (72) and the packing (82) for exerting a compressive loading against follower (84...	11/12/1991
5044606	Valve stem and packing assembly A valve stem and packing assembly is provided in which a rotatable valve stem includes a first tractrix surface for sliding contact with a stem packing and also includes a second tractrix surface for sliding contact with a bonnet. Force is applied by mean...	09/03/1991
4775303	Pump having adjustable packing This invention relates to an improvement in a reciprocating piston type pump having spaced radially expanding packings which are expandable in response to axial pressure on the packings. There is also included a compression spring between the packings. Th...	10/04/1988
4773442	Globe valve having a dismountable seat for rapid maintenance A globe valve comprising: a control rod (70) which is movable in translation along a valve axis (XX'), handle means (90) for controlling movements of said rod in translation, a disk (74) fixed to one end of said rod; a body (12) having an inlet passage (1...	09/27/1988
4558874	Valve stem packing assembly A valve body has a stem passage rotatably receiving a valve stem. A packing surrounds the stem in the passage and a packing nut threaded on the stem applies axial force to radially expand the packing into sealing engagement with the stem and passage wall....	12/17/1985
4531537	Plug valve for reduced leakage A plug valve has an actuating stem which is non-integral with the valve plug. The actuating stem is axially movable with respect to the valve plug to compressingly and sealingly engage an external sealing member in response to fluid pressure. The plug wed...	07/30/1985
4247121	Piston rod seal Leakage of gas is prevented by an oil seal established as an oil reservoir surrounding a piston rod. The reservoir is limited by spring-influenced plastic rings arranged in a seal housing. The springs are located at the low gas pressure side of the seal. ...	01/27/1981
4083566	Seal for piston rod of Stirling engine A Stirling cycle hot gas engine is provided with a seal about a moving piston rod for limiting leakage of gas from a high pressure working chamber into a low pressure crank casing. The seal is a conically shaped plastic ring urged against the piston rod b...	04/11/1978
3968970	Stuffing box The pressure springs for biasing the yoke and sleeve against the packing are mounted within an assembly unit formed by an annular carrier and a cap nut. The cap nut is threaded onto the housing while the annular carrier carries two bolts which pass throug...	07/13/1976

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Class 277/522 - Spring bias