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| Number | Title | Issue Date |
| 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 |
| 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 element comprising a plurality of sealing profiles and a protrusion m... | 03/22/2005 |
| 6478303 | Sealing ring packing A sealing ring packing (1) includes a cooled packing casing (4) that can be placed inside a stuffing box borehole (3), and holds at least one essentially annular slide ring (5) pressed against the moved component (2) to be sealed, whose outside periphery ... | 11/12/2002 |
| 6390666 | Packing gland seal assembly as an upstream seal for mixer rotors In the field of helical bladed rotors, and their sealing assemblies an improved upstream seal for mixer rotors is provided. It includes a bushing-like visco sleeve subassembly, a sleeve shaped metallic liner positioned abutting the visco sleeve; a sleeve-... | 05/21/2002 |
| 6302402 | Compliant high temperature seals for dissimilar materials A high temperature, gas-tight seal is formed by utilizing one or more compliant metallic toroidal ring sealing elements, where the applied pressure serves to activate the seal, thus improving the quality of the seal. The compliant nature of the sealing el... | 10/16/2001 |
| 6273477 | Gasket and pipe joint A pipe joint comprises a pair of tubular joint members, an annular gasket interposed between opposed end faces of the two joint members, and threaded means for joining the two joint members. Each of the joint members is prepared from a stainless steel hav... | 08/14/2001 |
| 6098989 | Composite metallic type seal with spiral springs, and manufacturing process for this seal This invention relates to a sealing O-ring of the composite metallic type with a metallic torus-shaped hollow central body (31), and at least one metallic sheet (32) surrounding this metallic body. The central body (31) is composed of a sequence forming a... | 08/08/2000 |
| 5813316 | Rotary hydraulic actuator In a rotary hydraulic actuator wherein a hermetic casing has the inside divided into a first hydraulic chamber and a second hydraulic chamber by a vane slidably rotatable on an inner curved wall of the casing, the vane is rotatable by an oil pressure supp... | 09/29/1998 |
| 5370405 | Packing A packing for hermetically sealing a member. The packing in accordance with the present invention comprises braiding yarns each of which includes a plurality of longitudinally arranged reinforcing fiber yarns and expanded graphite integrally bonded to at ... | 12/06/1994 |
| 4892320 | Stuffing box assembly A stuffing box especially for a high pressure steam valve has a plurality of packing rings including at least one laminate ring flanking a coiled graphite pressed ring, the laminate ring consisting of a stack of pressed expanded graphite foil annular disk... | 01/09/1990 |
| 4844411 | Valve A cryogenic valve having a valve seat in the valve body adapted to be closed by a conical seat disc. The seat disc is supported for vertical movement in a seat holder which is carried by an elongated stem that extends through the valve bonnet. The stem an... | 07/04/1989 |
| 4577872 | Valve stem seal with multiple ring means A seat for a valve stem comprised of two spaced rings of carbon fiber coated with a dispersion of polytetrafluoroethylene between which is interposed a ring of polytetrafluoroethylene.... | 03/25/1986 |
| 4363465 | Extreme temperature, high pressure balanced, rising stem gate valve with super preloaded, stacked, solid lubricated, metal-to-metal seal A balanced high pressure rising stem gate valve has lubricated metal-to-metal 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 the balancing stem. Each seal means includes... | 12/14/1982 |
| 4256317 | High-temperature, high-pressure valve packing system Valve packing system comprising a compacted body of expanded graphite material having an apparent bulk density 1.6 to 2.0 times its apparent bulk density prior to compaction and positioned in stuffing box with zero clearance between each of valve stem and... | 03/17/1981 |
| 4160551 | Seal assembly There is disclosed a seal assembly comprising alternate, generally "V"-shaped layers of graphite and a spring metal which are nested one within the other for sealing between the relatively movable, generally coaxial cylindrical surfaces of an annular rece... | 07/10/1979 |
| 4156529 | Stuffing box seal for fittings The stuffing box chamber in a fitting, particularly a valve, contains a deformable stuffing box seal. The seal includes conventional sealing material and a constituent material such as zinc or aluminum having a standard potential that is less positive in ... | 05/29/1979 |
| 4014557 | Column packing Column packing comprising a first layer and a second layer adjacent said first layer, each said layer comprising an inner knitted flattened tubular mesh element formed by inner filaments having 8 to 14 counts per inch, and outer knitted flattened tubular ... | 03/29/1977 |
