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Class 277/529 - Having particular cross-sectional seal profile


Subclass of Class 277 - Seal for a joint or juncture
Definition: Seal for the gland and packing box wherein the seal has
No. of patents: 63
Last issue date: 03/11/2008


1    
NumberTitleIssue Date
7341256Seal ring
A seal ring which maintains a stable sealing performance over a long term is provided. In a first seal portion, linear contact portions which come into linear contact with the sidewall surface of an annular groove on the unsealed fluid side are continuously extended...
03/11/2008
7303179Split packing follower for use with valves
Split packing followers for use with valves are disclosed. A disclosed packing follower includes a first member having a first portion of a flange and a first portion of a curved wall extending substantially perpendiculary from the first portion of the flange to def...
12/04/2007
7216872Seal for use with pipe and flange assemblies
The invention relates to a seal for use with a pipe and flange assembly. The seal is intended to prevent leakage during axial movement of the pipe relative to a flange. The invention comprises a central cylindrical elastomeric member located between two circular ela...
05/15/2007
7197936Pressure sensor
A ring-like groove 140 for accommodating a seal ring 130 is formed in fitting surfaces 12c and 13c of pressure introduction portions 12b and 13b for introducing a pressure from a measured member
04/03/2007
7175001Apparatus for driving raising and lowering of lift for tower type storehouse
There is provided an apparatus for driving the raising and lowering of a lift for a tower type storehouse so as to supply a force for vertically operating the lift carrying goods to storerooms on every floor of the storehouse, and more particularly to an apparatus f...
02/13/2007
7121554High-pressure sealing
In a high-pressure cylinder with an axial plunger, a seal assembly for scaling the gap between the cylinder wall and the plunger. The assembly is disposed in an annual recess in the wall having an open end and a bottom opposite thereto, and comprises a plunger-seali...
10/17/2006
7086650Gland packing
The present invention provides a gland packing in which impairment of the sealing performance due to cracks that unwillingly occur in an end portion in the width direction of an expanded graphite tape of a braiding yarn in the gland packing can be suppressed. In gla...
08/08/2006
7017915Stem or shaft seal arrangement
An improved seal arrangement in an assembly such as a valve assembly in which a compression member is provided to press a seal between the compression member and the valve body. In a preferred form, the compression member includes a recess which receives a first por...
03/28/2006
6931776Apparatus for the section-wise autofrettage of gun barrels
An apparatus for the section-wise autofrettage of gun barrels (22) by a hydraulic pressure generated inside the barrel. The apparatus (1, 1′, 1″) comprises a mandrel-shaped insert (2, 2′, 2″) inserted into the barrel (22) from the...
08/23/2005
6916023Self-adjusting cartridge seal
A seal includes a first seal retainer, a seal holder and a second seal retainer. A somewhat cup-shaped recess of the first seal retainer opens in a first direction of motion of a movable member against which the seal is to seal. The seal holder includes a first some...
07/12/2005
6769695Back-up rings for high pressure seals, packing assembly, and pumps incorporating same
An improved support for a seal is provided in the form of a back-up ring that reduces or eliminates the gaps between a pump plunger and a high pressure cylinder of a pump. The support includes a back-up ring having opposed first and second faces with a wall thicknes...
08/03/2004
6644007Braiding yarn made of expanded graphite
The present invention relates to a braiding yarn made of expanded graphite for a gland packing which is to be used in a shaft seal part of a fluid apparatus or the like. In the braiding yarn made of expanded graphite of the invention, an expanded graphite...
11/11/2003
6640823Fitting
A fitting including a housing (2), a rotatable body (4) which is situated in the housing and which may advantageously be constructed in the form of a conical plug, a bushing (18) provided in the housing to floatingly mount and seal the rotatable body (4),...
11/04/2003
6572117Gland packing
The present invention provides a gland packing in which a phenomenon where reinforcing fibers protruding from ends of adjacent braiding yarns overlap with each other, and the over-lapping reinforcing fibers are interposed over the whole range between expa...
06/03/2003
6568689Gland packing
The present invention provides a gland packing in which impairment of the sealing performance due to cracks that unwillingly occur in an end portion in the width direction of an expanded graphite tape of a braiding yarn in the gland packing can be suppres...
05/27/2003
6443423Load-profile compensating stuffing-box packing system for valves having stems of uniform cross-section
A valve packing system uniformly distributes the radial packing load in a valve stuffing box. In one embodiment the cylindrical wall of the stuffing box is tapered with a flat bottom. In other embodiments the cylindrical wall of the stuffing box is straig...
09/03/2002
6386644Bicycle hub provided with a seal member for preventing entrance of dust
A hub includes a hub housing sleeved rotatably on a spindle, and a tubular end piece sleeved fixedly on the spindle. A tubular flexible seal member is disposed between the hub housing and the end piece, and includes an outer ring and an inner ring. The ou...
05/14/2002
6322155Hub transmission mechanism with a seal member
A hub transmission mechanism includes an axle extending through a spoke-mounting barrel such that a right axle portion thereof extends outwardly from the spoke-mounting barrel. A sprocket-mounting member is sleeved around the right axle portion, and inclu...
11/27/2001
6318729Seal assembly with thermal expansion restricter
A seal assembly having a first seal with a first mating surface and a recess in the first mating surface, and a second seal having a second mating surface and a recess in the second mating surface. The first mating surface of the first seal is adjacent to...
11/20/2001
6283740Rotary lobe pumps
A rotary lobe pump is provided with an improved sealing mechanism between the rotor and outside diameter of the shaft upon which the rotor is mounted. An adapter is provided for the drive shaft which enables the drive shaft to be easily coupled to a varie...
09/04/2001
6273431Forged valve stem packing set
A three-ring packing set for a forged valve stem is disclosed which includes upper and lower adapter rings formed from fiber reinforced graphite tape and each having a first density and a first axial thickness, and an intermediate preform ring formed from...
08/14/2001
6076831Switch 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
6062570Stem 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
5860633Valve 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
5755372Self monitoring oil pump seal
A seal system for an oil well head, wherein the shaft rotates about its axis to drive a progressive cavity type pump. Primary and secondary polytetrafluoroethylene seals surround a sleeve that encircles the shaft. Pressure detectors connect to the space b...
05/26/1998
5524902Method and cartridge seal for packaging a valve
A packing system, for providing a seal around a valve stem, including a packing cartridge and a bushing. The packing cartridge includes a sleeve which has a tapered central passage. The sleeve also has external male threads and a hex head. Packing materia...
06/11/1996
5513556Packing gland construction
An improved packing gland construction for a fluid cylinder that includes an angular elongated resilient sealing member disposed in contact with the piston rod of the cylinder. An end of the sealing member facing the interior of the cylinder is provided w...
05/07/1996
5476271Shaft compression packing
A shaft extending along an axis through a bore in a body and forming with the body an axially outwardly open compartment has a seal assembly having an elastomeric sleeve-like seal seated in the compartment and a rigid sleeve generally coaxial with the sea...
12/19/1995
5419568Method and apparatus for reducing packing ring spin for trapezoidally shaped mechanically braided packing
A system for reducing packing ring spin and opening up of the joints formed by the ends of a packing ring during break-in of trapezoidally-shaped mechanical braided packing involves utilization of additional warp yarns within the sides of the packing. The...
05/30/1995
5333883Stuffing box seal
The invention relates to a stuffing box seal to provide a sealing action between a stationary wall of a housing or the like and a shaft. In accordance with the invention the shaft is provided with a collar, or with a ring or ring flange, which is sealingl...
08/02/1994
5297805Sealing ring
A sealing ring for a seal assembly used in oil field equipment including an elastomeric body and a reinforced face. The reinforced face is of molded polytetrafluoroethylene and is integral with the elastomeric body to provide improved pressure capability ...
03/29/1994
5022660Lantern ring coil
A length of plastic material may be formed into a helix and lantern rings may be cut therefrom for utilization with conventional packing adjacent a shaft in rotating or reciprocating equipment. The material exhibits a generally H-shaped cross-section defi...
06/11/1991
4991857Stuffing box assembly
A stuffing box assembly comprising a body which has a bore defined by a generally cylindrical wall and a shaft extending concentrically through the bore. A sleeve is disposed in the bore in surrounding relationship to the shaft, the sleeve having a cylind...
02/12/1991
4907780Combined seal and actuator support
A combined seal and actuator support for valves, in which a sleeve is engaged between the actuator shaft of the valve and the valve body to effect a seal between the shaft and body, and wherein complementally interengaged actuator means are on the sleeve ...
03/13/1990
4834394Sealed universal movement of a shaft extending between environments
Apparatus includes a mounting member having a bore which closely receives the shaft and a counterbore in which two elastic O-rings separated by an annular element are received. A first compression member threadably engages the mounting member to apply axi...
05/30/1989
4832352Piston rod seal
This invention relates to a piston rod seal in which the rod along which leakage should be avoided is surrounded by a gland of a plastically deformable material. The gland is mounted at the high pressure side of a wall through which the piston rod is pass...
05/23/1989
4809993Stuffing box sealing device
A housing has an opening therein, a rod extends within the opening in the housing, and an annular seal arrangement is provided around the rod within the opening for effecting a fluid seal between the housing and the rod with respect to a fluid pressure wh...
03/07/1989
4807890Sealing combination
An improvement in a sealing combination between a head of a hydraulic cylinder and a plastic covered cable traversing therethrough, including the plastic covered cable connected with a piston interiorly of the cylinder so as to be moved longitudinally res...
02/28/1989
4645212Seal arrangement
A seal arrangement is provided for preventing gas leakage along a reciprocating piston rod or other reciprocating member passing through a wall which separates a high pressure gas chmber and a low pressure gas chamber. Liquid lubricant is applied to the l...
02/24/1987
4583722Nitrogen die cylinder
There is disclosed a piston-cylinder assembly for use as a die spring wherein one end of the cylinder is connected to the source of nitrogen at high pressure to bias the piston outwardly through the opposite open end of the cylinder. The open end of the c...
04/22/1986
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