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7637508 |
High temperature high pressure seal stack having run-dry capability
A long life high pressure seal stack provides a reliable and efficient seal between a plunger and housing of a plunger type pump. The seal stack includes a high pressure sealing element and a low...
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7618045 |
Sealing arrangement
The invention pertains to a sealing arrangement 10 , 10 a , which acts between a housing 12 and a component 14 installed in the housing 12 , with a stop 16 , permanently connected to the...
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7472716 |
Valve packing removal device
A valve having a valve packing removal device attached thereto is disclosed. The valve may include a valve plug reciprocally disposed within the valve housing and connected to a sliding stem. The...
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7178806 |
Cinchpac self-loading rotary shaft seal
A seal for a conveyor drive which has an elastomer which is compressed between a cap ring and a housing.
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7121554 |
High-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...
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7121716 |
Mixing equipment sealing device
A shaft sealing arrangement for sealing bores around a pair of stirrer shafts that emerge through a wall of an associated mixing vessel includes a pair of generally cylindrical shaft sealing...
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7055593 |
Well stuffing box packing
Disclosed herein are apparatus and methods for sealing a well stuffing box.
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6869079 |
Stackable metallic seal and method of using same
A seal for sealing between a first component and a second component includes a first metallic element comprising a plurality of sealing profiles and defining a groove therein and a second metallic...
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6840520 |
Valve plug seal assembly
A seal assembly is adapted for use in a valve having a trim cage with an inner surface extending along an axis and a plug sized to fit inside the trim cage inner surface, wherein the plug is...
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6834862 |
Shaft sealing system for a rotary mechanical device
A sealing system to be inserted into the seal cavity of a rotary mechanical device to provide a seal and a bearing surface to eliminate whip in a rotating shaft. The sealing system includes a split...
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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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6626438 |
Seal assembly for telescopic hydraulic cylinder
A multi-tube hydraulic cylinder includes annular seal assemblies joining adjacent tubes. Each assembly includes an annular primary seal member and an annular base seal member. The primary seal...
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6578850 |
Dynamic seal for a drive shaft
A dynamic seal for a drive shaft including a seal housing with at least one inlet for injecting a fluid, (i.e., a liquid or gas) into the seal. The seal also has an expeller device, such as an...
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6571819 |
Method of installing valve seals and a two-piece tool therefor
A method of installing a valve seal at the base of a valve stem of an automotive internal combustion engine is disclosed. A two-piece tool consisting of first and second tool parts is employed for...
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6561517 |
Packing device for rotary valves
A packing device, for sealing a longitudinal shaft against leakage of a pressurized fluid, having an elongate valve housing with an annular internal chamber about a coaxial rotatable shaft. The...
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6502827 |
Sealing device and a method of repairing/replacing sealing devices
A sealing device (20, 80, 90), optionally in the form of a kit is provided for sealing about a rotatable member such as a shaft (22). The sealing device or the kit includes a follower housing (32)...
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6382633 |
Shaft seal device using gland packing
A shaft seal apparatus that exhibits a good and reliable sealing performance, even when a rotating shaft undergoes axial vibration, eccentric revolution, or the like. This shaft seal apparatus has...
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6375196 |
Sealing system for a screw conveyor and drive
A system is provided for sealingly coupling a gear reducer to a driven machine, such as a screw conveyor. The gear reducer includes a sealing assembly disposed in a bore of the gear reducer housing...
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6354566 |
Live loaded valve stem packing with shape memory alloy option
Live loaded valve stem packing wherein grafoil packing is molded into a metal cap that prevents extrusion of the packing, and has live loading built into the metal cap. This metal cap can be...
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6325387 |
Packing gland assembly
A packing gland assembly mountable on a shaft extending through an opening in a wall member of an apparatus consisting of a main housing member mountable on the shaft having an opening for...
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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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6231048 |
Mechanical seal incorporating a pusher ring for safe and easy assembly and repair
An improved mechanical seal incorporating a pusher ring to hold the integral parts of the seal together, in lieu of a typical retaining ring and snap ring aligning and compressing the gland plate....
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6220604 |
Self-adjusting interlocking bushing
A self-adjusting interlocking throat bushing is provided in which mating concentric bushing rings are provided with an interlocking annular slot in the outer bushing ring and an annular ridge at...
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6212999 |
Automatic throat packing torque clip
A reciprocating piston pump is provided with an automatic throat positive packing torque clip thereby providing consistent and extended pump life.
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6168161 |
Rotary valve shaft seal
A shaft seal having spacers positioned between the packing follower and the body of a valve. The spacers are flat, hard members of a certain thickness which allow maximum tightening of the packing...
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6161838 |
Cartridge seal stack
A cartridge seal stack utilizes a plurality of rotary cartridge seals each including a cold flowable plastic ring having a body for sealably engaging a housing bore and a lip for sealably engaging...
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6126171 |
Sealing cartridge
An improved sealing cartridge for use in a reciprocating plunger pump which includes a low pressure seal, a vacuum seal, and an oil seal within a unitized cartridge assembly to facilitate servicing...
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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...
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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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6003875 |
Gland assembly for use with mechanical seal
A mechanical seal assembly having multiple compression spring assemblies that are used to bias a stationary seal into sealing engagement with a rotating seal, the springs in the spring assemblies...
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5845909 |
Stuffing box with improved packing rings and method
A stuffing box 10, 60 designed for sealing engagement with a rod member R includes a plurality of stacked packing rings 32, 110, 150, 210, and a gland member 42, 64 axially moveable relative to the...
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5820130 |
Mechanical seal for movable joints of machines
The mechanical seal for movable joints of machines comprises at least two pairs of nonelastomer cylindrical rings (4, 5, 16) ground to each other with their faces and having their outer surfaces...
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5690341 |
Method and apparatus for the facilitating the servicing of drive-shaft assemblies for pressurized vessels
Apparatus and a method allow shaft packings and bearing assemblies to be serviced for a shaft penetrating a pressurized vessel without requiring the vessel to be emptied.
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5560709 |
Mixer drive apparatus enabling radial changing of shaft seal
A mixer assembly including a driven hollow quill having first and second conical portions in an axial bore and being adapted to receive and mate with a mixer shaft assembly including a mixer shaft...
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5549305 |
Sootblower packing gland
A sootblower includes a supply tube for delivering fluid to a concentrically mounted lance tube. The lance tube reciprocates into and out of a boiler delivering fluid to clean the inside surface....
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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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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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5476117 |
Retrofit second packing chamber for quarter-turn valves
A retrofit second packing chamber for quarter-turn valves that permits existing valves to be modified so as to meet modern emission standards without requiring replacement of the valves, and which...
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RE35116 |
Method and apparatus to facilitate the injection of sealant into a pressurized fluid member
A method and apparatus are provided for injecting sealant into a packing assembly chamber surrounding a valve stem 11 of a valve 2 without venting the pressure within the valve 2. A cylindrical...
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5435697 |
Seal arrangement for quick change fluid sections
An improved quick-change fluid section for piston-type paint pumps having a mounting flange with keyhole shaped apertures at one end and a threaded fitting at the other end to couple a fluid...
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5288055 |
Brace for a valve packing gland flange
The invention comprises a brace which may be used in a conventional valve assembly for holding the packing gland flange in place while valve components are repacked, repaired, and/or replaced. The...
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5238252 |
Shut-off fittings with a sealing device
A shut-off fitting with a sealing device consisting of a packing casing and a packing gland for the actuation element of the valve has the packing casing including bores that hold the sealing...
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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...
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5209496 |
Universal seal or packing gland
A universal gland defining a central opening for mounting the gland coaxially about a machine shaft to the machine housing, the mounting done with a plurality of bolts at bolt hole positions in the...
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5107882 |
Valve assembly with removable packing
A valve assembly includes a self-contained, packing removal means for removing the valve packing. The valve assembly includes a valve stem connected at one end to a valve, a bonnet for mounting the...
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5049031 |
Quick removal appartaus and method for lantern rings and packing in pump assemblies
The present invention provides a system for facilitating the removal of the lantern ring and packing in pump assemblies. Previously a steel hook was used to scrape away the worn packing. The...
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5030150 |
Splash guard assembly
An assembly for the collection and channeling of water leaking beyond a stuffing box or other seal assembly which is normally provided to isolate a rotating propeller shaft in a marine craft from...
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5013053 |
Universal seal cage lantern ring with double-sided slotted land structure
A universal seal cage lantern ring (USCLR) is provided with a slotted land type structure on both sides of a flexible central web, with the USCLR being constructed in a continuous undefined length,...
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4981174 |
Leakproof stuffing box with external lubrication for polish rod
A stuffing box for an oil well pump which utilizes a separate lubricating fluid chamber for the polish rod rather than using the crude oil that is being pumped as the lubricating fluid.
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4916938 |
Valve leakage inspection, testing and maintenance process
A valve maintenance process is described that allows for the inspection and testing of valve stem packing and back-seat leakage. The process uses the characteristics of incompressible fluid flow to...
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