Class 277/301 - Close proximity seal (e.g., contactless, fluent, etc.)

Subclass of Class 277 - Seal for a joint or juncture
Definition: Process of dynamic sealing wherein the sealing means is
No. of patents: 26
Last issue date: 12/13/2011

Number	Title	Issue Date
8074995	Low and reverse pressure application hydrodynamic pressurizing seals The present invention relates to circumferential seal ring segments positioned around a rotating shaft so as to prevent fluids from leaking from a lubricant sump during both low and high pressure conditions. The circumferential seal is comprised of a plurality of ad...	12/13/2011
7604239	Split bearing isolator and a method for assembling seal An assembly for sealing a rotating shaft and a bearing housing which has a stator, a rotor, and a unitizing element. The stator has at least two portions and an annular engagement flange extending in an axial direction having a groove on a radial side thereof. The r...	10/20/2009
7320468	Sealing arrangement A sealing arrangement for sealing a leakage gap between relatively moveable parts in a flow path between a region of high fluid pressure and a region of low fluid pressure comprises a sealing member having an upstream surface, a downstream surface, a radially outer ...	01/22/2008
7232286	Seal device and method for operating the same and substrate processing apparatus comprising a vacuum chamber The present invention provides a seal device comprising a sealing passage which allows communication between a first space and a second space, and evacuation lines individually connected to the first space and the sealing passage. A gas feed line for feeding dry gas...	06/19/2007
7226054	Clamp lock brush seal assembly A brush seal assembly which includes a brush seal which is bristle hoop positioned between two plates. A segmented ring is positioned in contact with the brush seal and provides a uniform clamping force against the seal to hold it in place within a support member.	06/05/2007
7197115	Cantilever and straddle x-ray tube configurations for a rotating anode with vacuum transition chambers An imaging tube assembly (11) for a computed tomography (CT) system (10) includes an insert (60) that has a vacuum chamber (72). An anode (58) resides within the vacuum chamber (72) and rotates on a shaft (66) via one...	03/27/2007
7147087	Elevator with duct for tail cord An elevator is provided to prevent a tail cord from being projected out of a tail-cord duct under the influence of air current flowing in the tail-cord duct. The tail-cord duct is formed along an elevating space in which a passenger car moves up and down. The tail-c...	12/12/2006
6780939	Low molecular weight hydrogenated nitrile rubber The present invention relates to hydrogenated nitrile rubber polymers having lower molecular weights and narrower molecular weight distributions than those known in the art. The present invention is also related to shaped articles containing hydrogenated nitrile rub...	08/24/2004
6679501	Motor with stationary shaft and high speed capillary seal A motor or bearing which incorporates the use of a capillary seal adjacent a bearing race between the shaft and surrounding hub or housing. The seal may take a plurality of forms, including a straight capillary seal; a seal formed between the housing and ...	01/20/2004
6659469	Molded rubber jacket with fabric reinforcement for valve stem seal An elastomeric valve stem seal component is adapted for installation over a valve guide of an internal combustion engine. The seal component incorporates fabric reinforcement within an annular jacket body of the component. In one preferred form, the fabri...	12/09/2003
6527274	Turbine rotor-stator leaf seal and related method A seal assembly for installation between rotating and stationary components of a machine includes a first plurality of leaf spring segments secured to the stationary component in a circumferential array surrounding the rotating component, the leaf spring ...	03/04/2003
6139018	Positive pressure-actuated brush seal A brush seal includes a plurality of bristles in a circumferential array secured to a fixed component and about a rotary component. The bristles are cantilevered toward the rotary component at an angle to the radii of the rotary component with the bristle...	10/31/2000
6059292	Speed reducer apparatus having auxiliary seal assembly A speed reducer apparatus includes an auxiliary seal assembly to inhibit ingress of particulate matter. Preferably, the seal assembly is located axially outboard of a primary seal, such as a land riding seal. The seal assembly includes a plate defining a ...	05/09/2000
5952080	Bearing having micropores, and design method thereof A method for designing bearings, of improved performance, the load-bearing surfaces of which feature micropores about 2 to 10 microns deep and, preferably, aspect ratios on the order of 7 to 20. The hydrodynamic pressure distribution of a suite of bearing...	09/14/1999
5834094	Bearing having micropores and design method thereof A method for designing bearings, of improved performance, the load-bearing surfaces of which feature micropores about 2 to 10 microns deep and, preferably, aspect ratios on the order of 7 to 20. The hydrodynamic pressure distribution of a suite of bearing...	11/10/1998
5799951	Rotating sealing device A rotating sealing device for sealing between a wall separating two mediums under substantially different pressure and a rotatable shaft utilizes a combination of a liquid meatal seal comprising at least one liquid metal ring and a shield means which prev...	09/01/1998
5630590	Method and apparatus for improving the airsealing effectiveness in a turbine engine A method for improving effectiveness of a labyrinth seal 40 between coannular components 22, 30 in a turbine 10 includes reconfiguring one of e components to provide means for receiving and retaining a replaceable brush seal 60 installing the brush seal s...	05/20/1997
5165699	Liquid full pressurized vessel seal A liquid full pressurized vessel seal is provided to effectively seal around rotating shafts in the walls of vessels that stir, for example, highly viscous materials such as polymers. The seal has a housing with a conventional mechanical seal and a bushin...	11/24/1992
5152536	Fluid seal with a maintained gap of seal faces A device for a wear free sealing of fluids from within to the outside of the confined space of a rotating machine. The sealing effect occurs between coplanar faces of a rotating ring and a power assisted stationary ring which maintains a suitable distance...	10/06/1992
4471963	Sealing member for rotating shaft and method of sealing therewith An improved sealing sleeve for the rotating drive shaft of a gear pump or other fluid conveying system has an internal axial bore for receiving the shaft, an intermediate cavity formed in the bore and oppositely-handed helical channels extending in the bo...	09/18/1984
4457515	Brush seal and method Disclosed is a method and apparatus for positioning a pair of opposed brush assemblies in a gap defined by end baffles between process chambers. The brushes have a plurality of offset bristle clusters secured to a header, and the header is preferably angl...	07/03/1984
4455026	Vee-shaped magnetic/centrifugal seal and method of operation A combined magnetic/centrifugal seal for a rotating shaft rotatably journalled within a housing. The rotating shaft has a generally circular cross section and at least one radially extending generally Vee-shaped cross section circumferential portion forme...	06/19/1984
4447061	Melt pump seal with vacuum housing A method and apparatus for preventing fluid leakage through a sealing mechanism of a melt pump into a vessel during the period of establishing a vacuum therein and increasing the viscosity of the material fed thereto. The method includes enclosing in a fl...	05/08/1984
4392655	High-pressure seal with controlled deflection under pressure A seal for a movable shaft which extends from a cavity within a high-pressure vessel maintains a uniform gap between the shaft and the seal body at high pressures to form an effective seal while providing adequate clearance between the shaft and the seal ...	07/12/1983
4333659	Turbocharger shaft seal arrangement A shaft seal arrangement for turbochargers comprises a two piece wear washer for preventing passage of bearing lubricant into the turbocharger turbine housing. The two pieces of the wear washer seal respectively with the turbocharger shaft and with the tu...	06/08/1982
4189157	End face shaft seal A mechanical seal for use in sealing the hole formed in a stationary bulkhead through which a marginal length of a rotating shaft is received. The seal includes a barrel attached to a flange so that the flange can be attached to the bulkhead with the barr...	02/19/1980

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Class 277/301 - Close proximity seal (e.g., contactless, fluent, etc.)