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| Number | Title | Issue Date |
| 7229102 | Fluid coolant union A coolant union includes a seal assembly having a first seal member and a non-rotating second seal member. At least one of the annular sealing surfaces presented by the rotating seal member and the non-rotating seal member is chamfered such that the chamfered sealin... | 06/12/2007 |
| 7134491 | Leak remedy through sealants in local reservoirs The present invention provides a method for remedying minute seal leaks in downhole tools and equipment. The various embodiments of the present invention utilize pressure activated liquid sealants stored in local reservoirs to remedy such leaks. ... | 11/14/2006 |
| 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 open end and a bottom opposite thereto, and comprises a plunger-seali... | 10/17/2006 |
| 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 form, the compression member includes a recess which receives a first por... | 03/28/2006 |
| 6182974 | Stuffing box packing assembly Compact stuffing box packing assemblies of the present application include high density metal inserted braided end rings of graphite which have each been die formed to have angled facing surfaces and a plurality of center Preform rings is disclosed In one... | 02/06/2001 |
| 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 |
| 5997003 | Annular sealing assembly and methods of sealing Methods and apparatus are described for improved sealing across an annular space between facing sealing surfaces. Methods for mechanically setting and pressure energizing sealing ring assemblies are also described. In one aspect, several sealing ring asse... | 12/07/1999 |
| 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 |
| 5806858 | Compact five ring stuffing box packing assembly The compact five ring stuffing box packing assembly includes high density metal inserted braided end rings of graphite which have each been die formed to have angled facing surfaces. Three low density graphite preform rings having angled facing surfaces a... | 09/15/1998 |
| 5306021 | V-shaped seal with anti-extrusion section A dealing device having a body section and an anti-extrusion section is disclosed, the body section being disposed on top of the anti-extrusion section. The body section includes sealing surfaces for enclosures in which the sealing device is located. The ... | 04/26/1994 |
| 5083749 | Plastic needle valve A plug-type, rising stem needle or shut-off valve for controlling fluid flow comprises a valve housing forming a valve chamber with inlet and outlet ports connecting therewith. A bonnet member with a cylindrical passage joins with the valve chamber and op... | 01/28/1992 |
| 5044672 | Metal-to-metal sealing pipe swivel joint A metal-to-metal sealing pipe swivel joint especially useful with a subsea well completion system to pivotally interconnect the subsea wellhead to a lay-away flowline, the swivel joint having an annular seal element with metallic sealing surfaces and inne... | 09/03/1991 |
| 4643440 | Packing with compensating means Packing for a stuffing box for sealing a movable shaft including a sealing ring which is used together with a non-sealing compensator ring. The sealing ring includes the annular shaft sealing lip extending from said ring body along the shaft for contactin... | 02/17/1987 |
| 4617957 | Rotary plug valve A rotary plug valve has a frusto-conical valve plug (4) received within a frusto-conical valve chamber with a tapered valve liner (3) being provided between the two. The chamber and the plug are oppositely tapered so that by axial movement of the plug the... | 10/21/1986 |
| 4440404 | Packing arrangement A packing assembly provides a seal for an annular space between a pump plunger and a pump body of a reciprocating plunger pump. The pumping assembly includes an elastomeric header ring disposed in a high pressure end of the annular space for preventing mi... | 04/03/1984 |
| 4379557 | Valve stem packing structure A "fire-safe" packing arrangement (104) for a valve stem (72) which extends through a packing chamber in a valve bonnet bore (42) to a valve chamber (50) in a valve body (12). The packing arrangement (104) comprises a low temperature packing assembly (112... | 04/12/1983 |
| 4356997 | Flow control mechanism for high pressure wells A flow control mechanism for high pressure wells comprises a body structure having inlet and outlet passages and adapted for connection to a wellhead in such manner that a metering device meters the flow of production fluid through the inlet and outlet pa... | 11/02/1982 |
| 4328974 | Stuffing box packing system and method A packing (10) for a stuffing box (12), for example, for petrochemical and/or power industry valves including one or more low density, graphite preform rings (30 and 44) which are further compressed, when the packing gland is tightened, with controlled ma... | 05/11/1982 |
| 4327923 | Packing A packing assembly comprises a plurality of adjacent solid, compressible, non-resilient, low friction packing rings having cylindrical sealing surfaces forming a continuous sealing surface along the shaft and each solid ring having a pair of converging ge... | 05/04/1982 |
| 4302020 | Actuating sealing joint A joint for sealing around rods, shafts, cylinders and the like. A metallic sealing ring is configured for axial pressure control and is installed without substantial frictional contact with surfaces to be sealed. An actuating member is a part of the join... | 11/24/1981 |
| 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 |
