Abstract: A rotary shaft sealing system comprising a rotary lip seal and its associated retention gland, wherein the each of the seal and the gland are complimentary of the other within the environment of use. The system is particularly adapted for the sealing of a rotary shaft in an environment wherein the hydraulic pressure upon the fluid within the gland is at least 20 psi, or higher; and, such fluid pressure within the gland is further subject to variation or surges at the time of start-up and/or during operation/use of the rotary shaft. The retention gland geometry assists in the direction and application of hydraulic pressure against the seal so as to increase the radial contact force between the seal lip and the rotary shaft, thus, insuring more complete and effective sealing at this contact interface. The seal of this system is preferable pre-loaded so as to apply positive sealing pressure against the rotary shaft both prior to and during use.

Abstract: An improved mechanical seal assembly is provided for sealing rotating shafts with respect to their shaft housings, wherein the rotating shafts are subject to substantial axial vibrations. The mechanical seal assembly generally includes a rotating sealing ring fixed to the shaft, a non-rotating sealing ring adjacent to and in close contact with the rotating sealing ring for forming an annular seal about the shaft, and a mechanical diode element that applies a biasing force to the non-rotating sealing ring by means of hemispherical joint. The alignment of the mechanical diode with respect to the sealing rings is maintained by a series of linear bearings positioned axially along a desired length of the mechanical diode. Alternative embodiments include mechanical or hydraulic amplification components for amplifying axial displacement of the non-rotating sealing ring and transfering it to the mechanical diode.

Abstract: The present invention provides a gasket for use in a service portion of a brake control valve in a railway braking system. The gasket comprises an elastomeric composition with a predetermined shape. There is a series of bead-like projections formed on the first surface of the gasket for sealing such gasket with a body portion of the valve. A first aperture is disposed in the gasket at a predetermined location for engagement with a projection on the filling piece of the service portion. A brass insert is molded into the elastomeric composition and has a second aperture formed therein. The second aperture is in fluid communication with an auxiliary reservoir of such railway braking system. A third aperture is formed in the gasket in a third predetermined location. A brass insert, which has a first predetermined configuration, is molded into the elastomeric composition of the gasket.

Abstract: A door closing device. The device includes a main body, a shaft, an annular cover mounted in the main body, and a planar gasket. Two ends of the shaft are rotatably supported in the annular cover by a collar. The planar gasket is mounted around the shaft and between the collar and a peripheral edge defining a central annular hole of the annular cover. The planar gasket includes an inner diameter approximately the same as an outer diameter of the shaft and an outer diameter approximately the same as an inner diameter of the annular cover. The planar gasket further includes two opposed planar surfaces.

Abstract: A self aligning stuffing box for pump jacks includes a first tubular body having an interior bore with internal stops. A second tubular body has a first end with a concave contact surface. The second tubular body is telescopically received within the first tubular body with the concave contact surface precluded from withdrawal by the internal stops. An annular body is received within the interior bore of the first tubular body. The annular body has a convex contact surface which engages the concave contact surface of the second tubular body. A third tubular body is received within the first tubular body and exerts a compressive force upon the annular body to maintain the convex contact surface engaged with the concave contact surface of the second tubular body during relative movement.

Abstract: A resilient compressible gasket having an embedment portion, a pipe engaging portion and a intermediate “radius” portion integral with the embedment and pipe engaging portions. The gasket assumes a “pleated” configuration when in the operative position, the pipe engaging portion extending through the embedment portion, yielding a gasket which compensates for deviation of the pipe from a nominal horizontal alignment without any reduction in the water-tight seal provided by the gasket. The gasket is sized to provide for easy insertion of a corrugated pipe into the pipe engaging portion while providing an excellent water-tight seal when clamped into position about one or more annular recesses and peaks of the corrugated pipe. Another embodiment of the gasket is designed to be secured to a cored or performed opening in a cast member through the use of an expansion-type clamping assembly.

Abstract: A unitary sleeve lip seal can be used to provide permanently lubricated sealed bearings in severe service conditions such as the track pins of track-driven vehicles and agricultural equipment. The seal has a labyrinthine exclusion path and multiple dust lips contacting the sleeve in addition to the main sealing lip. A garter spring encircling the main sealing lip may enable the seal to operate at moderately elevated pressures. The sleeve has a radial flange at the outermost end. Elastomeric lips extend between the sleeve flange and a faceplate that terminates the outside end of the seal housing. The seal is packed with water-resistant grease and can, when installed in association with grease-packed bearings can create a permanently lubricated bearing/shaft assembly that requires no re-greasing. Resilient coatings both protect the sleeve and case and also improve leak resistance, especially when the seal is retrofitted onto shafts that have been damaged.

Abstract: Glass-ceramic sealants for ceramic membrane reactors, ceramic membrane sealed to holders or substrates and methods of making seals between two ceramic materials or between a ceramic and a metal or metal alloy are provided. These sealants combine silicate glass-ceramic materials with selected metal oxides and, optionally, materials similar or identical to the materials being sealed, and employ thermal processing so that the resultant materials will have a thermal expansion coefficient that substantially matches the thermal expansion coefficients of the two materials. Surfaces of the ceramic sealant that are exposed to reactive atmospheres can be protected by providing a metal or metallic alloy layer over the ceramic seal.

Abstract: A sealing grommet is provided that includes a grommet body with a sealant reservoir and a sealant drain portion. The grommet body has an outer peripheral wall, a panel engagement recess formed on the outer peripheral surface of the outer peripheral wall, and an inner peripheral wall extending inwardly of the outer peripheral wall and defining a wire harness insertion aperture inwardly thereof. The sealant reservoir is provided between the inner and outer peripheral walls, and is configured to temporarily store a sealant therein. The sealant drain portion is provided on the inner peripheral wall, and is configured to open upon deformation of the grommet body, thereby permitting the sealant to drain into the wire harness insertion aperture from the reservoir. With the above construction, the sealant can easily permeate between wires of the wire harness provided within the wire harness insertion aperture.

Abstract: A dielectric gasket (10) includes an outer annular disk (50) and an inner annular disk (56) both formed, at least in part, from electrically non-conducting materials. A seal (54) is disposed between an inside diameter (58) of the outer annular disk (50) and an outside diameter (62) of the inner annular disk (56). The outer annular disk (50), the inner annular disk (56), and the seal (54) operate to form an insulating barrier of electrically non-conducting material between adjacent pipe flanges (12, 14).

Abstract: A brush seal includes a brush seal body formed of heat-resistant magnetic silicone rubber material in the form of a channel. Bristles are disposed in the channel of the brush seal body at a cant angle and project from the edges of the body terminating in bristle tips. The brush seal is formed linearly and, in use, flexed to form an annular seal between adjacent annular sealing components, with the seal carried by one component and the bristle tips engaging the opposite component. The magnetic material of the seal body enables temporary securement of the seal to one of the components, while the seal is adjusted and finally secured in place.

Abstract: A seal cartridge adapted to be mounted upon a rotating shaft, including a rotor and a stator, the rotor and stator being arranged to create a labyrinth portion and a contact portion. The rotor includes a radially outwardly directed surface and the stator includes one or more flanges biased toward the rotor surface to create the contact portion. The rotor and stator create a labyrinth portion with an inwardly facing ridge positioned within an outwardly facing groove. The stator may include a shoulder for positioning the seal cartridge with respect to a housing, or instead a sloped surface. The rotor may also have a flange which deforms and fits within an annular notch of the stator.

Abstract: A brush seal assembly is radially and axially repositionable relative to stationary and rotating components. Shim packs whose thickness can be reduced by peeling adhesively attached foil layers from the shim packs are used to provide both axial and radial repositioning. In another form, a plurality of set screws may be threaded into a mounting member for the brush seal assembly to controllably space the brush seal from the rotating component. In a further form, an eccentric cam is rotated to reposition the brush seal assembly radially inwardly or outwardly with shim packs being used to reposition the brush seal in an axial direction.

Abstract: In a hydrogen cooled generator, a seal casing has a chamber opening radially inwardly for receiving a pair of seal rings forming a fluid film along the interface between the rings and the rotor. A spring biases the seal rings against axial spaced flanges of the seal casing and static oil sealing grooves are provided at the interface of the seal rings and flanges. A brush seal is carried by one or both of the seal rings or by the seal casing and has bristles for engaging the surface of the rotor. The combination of seal rings and brush seal form a low flow fluid film seal maintaining the hydrogen atmosphere and oil on opposite sides of the housing wall and the seal casing segregated from one another.

Abstract: An apparatus and related method for preventing leakage of process gases or liquids from a semiconductor wafer processing system, such as an oxidizing furnace. A specific embodiment of the present invention provides a method of preventing leakage of process gases or liquids from a joint of external piping and piping in a semiconductor wafer processing system. The method includes installing as the external piping a tube. The tube has a flange shaped to accommodate an O-ring. The method also includes providing an O-ring for use with the flange, and fastening the O-ring between the flange and the piping with a fastening mechanism to prevent leakage of process gases or liquids from the joint. Yet another embodiment provides a retrofit to existing external piping. A further embodiment provides an apparatus for processing semiconductor substrates that includes use of the O-ring, fastening mechanism and tube with flange.

Abstract: An elastomeric gasket for a pipe coupling having a dry lubricating film of an aqueous solution of a lubricant and a film-forming polymer adhered thereto.

Abstract: The invention relates to downhole rotary pumping arrangements and more particularly to drivehead gimbals and seals used in the driveheads of downhole rotary pumps. The gimbal and seal system described enables the wobble of a rotating shaft to be absorbed without compromising the seal around the shaft.

Abstract: A locking annular gasket, for providing a seal between a tubular member and a smooth annular section, includes an annular gasket portion and a locking member. The annular gasket portion seals a gap between the smooth annular section and the tubular member. The locking member is secured to the gasket portion for holding the gasket portion in place while the tubular member and the smooth annular section are assembled.

Abstract: In a stripping arrangement for preventing liquid from penetrating at the peripheral gap (1) between a reciprocating component (2) and a casing opening (3) surrounding the latter, a choke ring (8) is provided on the side facing the inlet of the liquid to be stripped in the stripping bushing (4) in addition to at least one stripping ring (5) arranged in a stripping bushing (4), wherein this choke ring is designed with a smooth annular surface (9) on its front side facing the inlet of the liquid, and adheres to the smooth inner front surface (10) of the stripping bushing (4) facing it, exposed to the adhesive forces (S1) in the liquid. In this way, a significant path of entry for the liquid to be stripped into the stripping bushing (4) is blocked, so that the stripping ring (5) has to strip substantially less liquid from the reciprocating component (2).

Abstract: This invention relates to an arrangement for sealing a closed chamber in which equipment is to be replaced and especially to a chamber in which equipment is to be replaced while the chamber is to be maintained closed. The arrangement includes a channel filled with a fluid, such as water, and a skirt arranged to extend into the fluid to form the seal. As the skirt extends down into the liquid, a portal space is formed at the opening in the chamber and the opening preferably includes a gate for closing the chamber from the portal space and the outside.