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7484609 |
Hub assembly for a bicycle
A hub assembly for a bicycle includes a hub shell rotatably mounted on a hub axle, a plurality of pawls disposed respectively in retreat bores in the hub shell to be moved between driven and idle...
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7216872 |
Seal 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...
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7086650 |
Gland 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...
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7017915 |
Stem 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...
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6769695 |
Back-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...
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6640823 |
Fitting
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...
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6572117 |
Gland 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...
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6443423 |
Load-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...
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6386644 |
Bicycle 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...
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6322155 |
Hub 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...
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6318729 |
Seal 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....
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6283740 |
Rotary 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...
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6273431 |
Forged 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...
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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...
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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,...
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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...
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5755372 |
Self 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...
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5524902 |
Method 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...
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5513556 |
Packing 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...
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5476271 |
Shaft 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...
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5419568 |
Method 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...
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5333883 |
Stuffing 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...
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5297805 |
Sealing 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...
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5022660 |
Lantern 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...
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4991857 |
Stuffing 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...
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4907780 |
Combined 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...
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4834394 |
Sealed 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...
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4832352 |
Piston 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...
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4809993 |
Stuffing 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...
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4807890 |
Sealing 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...
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4645212 |
Seal 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...
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4583722 |
Nitrogen 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...
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4560176 |
Inverted cone stuffing box
A stuffing box for use in oil and gas wells having improved sealing. A plurality of ring-like packing glands each has an outer surface defining an inverted frusto-conical shape and a bore...
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4560109 |
Shaft sealing device for sliding portion of needle valve in paint spray gun
A shaft sealing device is disposed on the sliding portion of a needle valve stem in a spray gun for spraying a compressed fluid (paints), particularly in an airless paint spray gun, and is capable...
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4553759 |
Valve and improved stem seal therefor
An improved valve with an improved stem seal including a body having a valve chamber, an inlet to and an outlet from the valve chamber, and a valve seat in the valve chamber, a valve member movable...
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4529181 |
Fluid die spring
A fluid die spring comprises a cylinder connected at one end to a reservoir of gas at high pressure. A piston in the cylinder has a smaller diameter rod projecting out the other end of the cylinder...
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4524981 |
Annular seal with V-cut
There is described herein an annular elastomer seal arranged for primary compression-type sealing capability and secondary lip-type sealing capability. The annular seal includes a pair of grooves...
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4516752 |
Mechanically preloaded packing assembly
A pressure energized mechanically preloaded packing assembly (48, 68) of a high pressure gate valve (10). The packing assemblies are positioned in an annular space about the valve stems (36, 64)...
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4489916 |
Valve and stem seal therefor
An improved valve having a body with an inlet, an outlet, a valve chamber, a valve seat, a valve member movable in the valve chamber toward and away from said valve seat, a stem connected to said...
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4486002 |
Combined metallic and flexible non-metallic pressure seal
A fluid pressure seal comprising the combination of a metallic sleeve-like member having one or more annular grooves around its outer periphery and two or more annular grooves on its inner surface,...
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4478423 |
Oil seal and unitized seal carrier for reciprocating shaft
An improved T-ring wiper seal and seal carrier assembly for use in the fluid end of a reciprocating pump.
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4462568 |
Valve construction and method of making the same
A valve construction and method of making the same are provided, the valve construction comprising a housing having a valve chamber therein, a valve member rotatably carried by the housing in the...
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4436316 |
Fluid seal
A seal assembly which includes a first seal ring having a geometric axis. The first seal ring has a unitary support member having a cross section which is generally T-shaped. The T-shaped cross...
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4426093 |
Stem packing with slitted flexible polymer sleeve
An improved stem packing. In the preferred and illustrated embodiment, the packing for the stem is captured within a housing normally described as a bonnet assembly, and is axially loaded by a...
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4398731 |
Y-Interlock packing seal
A packing seal characterized by a plurality of rings formed from extruded lineal members. The extruded lineal members each have a height h from top to bottom, a width ΔR, a pair of heels that...
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4340204 |
High pressure gate valve with preloaded, stacked, solid lubricated stem seals
A high pressure gate valve having at least one pressure actuated seal means between the bonnet part of the valve body and the valve actuating stem and between the chamber part of the valve body and...
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4336946 |
Non-rotatable elastomeric O-ring seal
An elastomeric O-ring seal (10) for sealing between a housing (20) and a shaft (22). The seal (10) defines an inner sealing surface (12) and an outer sealing surface (14) having a generally uniform...
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4265457 |
Shaft seals
A shaft seal incorporates a casing formed with a stepped bore both diameters of which are greater than the diameter of the shaft fitted to the bore. A bearing sleeve fitting the shaft is located in...
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4262690 |
High pressure stem packing for gate valves
A pressure energized packing arrangement (50, 74) for sealing the stem (64) and bonnet (66) of a high pressure gate valve. A stack of packing rings (90) is compressed against the valve stem and...
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4205767 |
Cannula injection device
An injection device for use with a fluid transporting cannula and a female fitting for a liquid system. The cannula is surrounded by a first sleeve which in itself is surrounded by a second sleeve....
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