Abstract: The present seal system is in two parts. First is that of an elastomer energizer, which may be in the shape of a square ring, o-ring, or an other custom design for energizing the seal system. Second is that of a seal element having a particular geometry and composition. The geometric layout of the seal element ensures firm contact between the seal and groove bottom, independently of the seal pressure and radial position of the moving part, and concentrates contact forces against the moving part by means of a seal apex. In the installed state, the seal is forced into contact with the groove bottom by having an outer diameter matching or exceeding that of the groove bottom, and a radial height exceeding that of the housing groove. Further, the influence of the compression ring or energizer is balanced out by positioning the seal apex near the axial position of the center of the energizer.

Abstract: A valve gasket for a metering valve serving to dispense a fluid, in particular a powder dispersed in a propellant gas, said metering valve comprising a valve body defining a metering chamber, and a valve rod mounted to slide in said metering chamber between a rest position and an actuating position, the sealing between said valve rod and said metering chamber being provided by said valve gasket, said valve body being fixed in a fixing cap serving to assemble the valve onto a fluid reservoir, said valve gasket being provided with a radially inside contact zone over which said valve rod slides, said contact zone being fixed to a rigid element so that, while said valve rod is moving, said contact zone of the valve gasket remains substantially unchanging in terms of its shape and of its position, said contact zone having a profile that is rounded at least in part, so as to reduce the area of contact between said valve gasket and said valve rod, said rigid element being an integral part of said fixing cap, and in

Abstract: A seal for a piston in a circulating piston device such as a motor has a number of rearwardly angled vanes. The piston circulates in an annular passage. The vanes bear against walls of the passage. In one embodiment the vanes are pivotally mounted to a piston and have centers of mass which are located so that centrifugal forces on the vanes, which result from the circulation of the piston, help to bias the vanes against walls of the passage. Each radially inward vane has a center of mass located forward from a pivot axis of the vane. Each radially outward vane has a pivot axis located rearward from a pivot axis of the vane.

Abstract: A sealing device comprising: a box including an opening, and a process chamber which communicates with an outside through the opening; a slider slidable relative to the box in a state in which the opening is closed while a gap is left between the box and the slider; a differential evacuation seal for sealing the gap, the differential evacuation seal provided on the box side; and a roller bearing disposed between the box and the slider.

Abstract: A seal cartridge for a centrifugal pump includes a housing that fits within a conventional stuffing box of the pump and has a cylindrical internal surface receiving the shaft. A pair of annular grooves are provided internally of the housing adjacent respectively opposite ends thereof. Each groove receives an O-ring that runs in contact with the sleeve when the shaft rotates. The sleeve, housing and O-rings define an annular chamber through which water is circulated to cool and lubricate the O-rings. The water is pressurized to cause the O-rings to deform and seal against the sleeve.

Abstract: A low leakage sealing system is provided between a steam pipe and a housing comprised of a pair of shells and a nozzle box movable relative to one another. The sealing system includes large and small diameter sealing rings engaging the pipe and shells or nozzle box and a secondary sealing element disposed between the sealing rings and one of the pipe and shells or nozzle box. The sealing elements comprise frustoconical elements having curved end surfaces forming primary seals with the sealing rings and the housing. In another form, the sealing system includes annular carrier elements having radially opening cavities for receiving sealing rings engageable with the pipe and housing, respectively. The carrier elements are axially spaced from a plurality of sealing rings to provide the low leakage sealing system.

Abstract: An improved neck seal having an interior surface being concave throughout and shaped to entirely conform to the circumference of a roll surface of a roll. The concave surface further defines the interior side of an oil-side lip extending upwards from the seal body. A portion of the lips outermost end extends radially downward to form a first stop integral with the lip. A portion of the outermost end of the seal body also extends upward from the top surface thereof to form a second stop integral with the seal body. A v-shaped spring is then disposed in a v-groove defined by the inclined bottom surface of the oil-side lip, and the flat top surface of the seal body. In this manner, the first and second stop retain the spring in a position conducive for a more positive seal contact between the lip of the seal and the roll neck without the use of a garter spring.

Abstract: 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 segments each having a radial mounting portion and a substantially axial sealing portion, the plurality of leaf spring segments shingled in a circumferential direction.

Abstract: A seal is provided at the intersegments of hydrogen seal rings for preventing oil leakage through this potential gap between the seal ring segments. By minimizing leakage through the gaps between the open rings, hydrogen consumption in hydrogen-cooled generators due to leakage oil is reduced. In a preferred embodiment, the seal is provided by a brush seal secured to one of the seal ring segments and received in a slot defined in the other of the seal ring segments.

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: The present invention provides an improved seal cage which is useful, for example, for injectable sealing compound systems. In preferred embodiments the dimensions of the seal cage can be adjusted for use of the seal cage with shafts of different diameters and stuffing boxes of varying depths.

Abstract: A radial shaft seal with a sealing disk made of a polymer material which curves towards a space that is sealed as the sealing disk radially approaches a shaft with respect to which it forms a seal. The sealing disk has a first surface profiling on the side facing the shaft and a second surface profiling on the side facing away from the shaft, the first surface profiling being formed by sawtooth recesses arranged adjacent to one another axially at a distance. The first bordering surfaces of the recesses facing the space to be sealed form a smaller angle with the shaft than second bordering surfaces of the recesses facing away from the space to be sealed. The second surface profiling is formed by essentially U-shaped recesses which are open on the side facing away from the shaft and are arranged adjacent to one another with an axial distance between them.

Abstract: A seal for a bicycle transmission includes an annular housing and an annular seal member. The housing includes a side wall defining a plurality of circumferentially disposed slots. The seal member is retained to the housing and extends radially inwardly. The seal member is formed from a resilient material, and the housing is formed from a material that is more rigid than the seal member.

Abstract: An apparatus is disclosed for maintaining a fluid seal with a moving substrate. The apparatus includes an enclosure and a cap. The enclosure has a first surface and a second surface with the first surface being in sealing contact with the moving substrate. The cap seals off the second surface of the enclosure. The cap is secured to the enclosure at at least two spaced apart locations and has a non-secured portion that is capable of deflecting independently of the enclosure. The apparatus further includes means for introducing a pressurized fluid into the enclosure. The pressurized fluid creates a net force on the enclosure of zero and a force on the cap which causes a portion of the cap to deflect. The deflection of the cap allows the first surface of the enclosure to remain in sealing contact with the moving substrate.

Abstract: Sealing arrangement for a rolling bearing exhibiting at least one row of rolling elements 7 between a first ring 1 or 2 and a second ring 2 or 1 which are concentric and radially separated from one another by an annular space 11, at least on one side of the bearing, this arrangement comprising, on the said side of the bearing, an elastic seal 18 fixed to the first ring 1 or 2 and exhibiting a first lip 19 pressing against a bearing surface situated on the second ring inside the said annular space. The said first bearing surface 20 exhibits the overall shape of a cone frustum orientated in such a way that its extension towards the aforementioned side of the bearing approaches the said first ring 1 or 2, and that the said first lip 19 is shaped in such a way that the force with which it presses against the said first bearing surface 20 increases if the pressure inside the rolling bearing increases, for example when lubricating the bearing.

Abstract: A valve with fire-resistant seal for use in industrial piping applications. The valve includes a valve body with a valve element therein. The valve is illustrated as a ball valve, but other valve configurations could also be used. A valve stem engages the valve element so that it can be rotated between open and closed positions. A conventional primary seal is used on the valve stem for normal conditions. The valve body defines a body bearing surface, and the valve stem defines a facing stem bearing surface. A thrust bearing is disposed between the body and stem bearing surfaces, and a fire-resistant seal is positioned radially inwardly from the thrust bearing. Initially, the fire-resistant seal is not engaged with at least one of the body or stem bearing surfaces, and the fire-resistant seal has a thickness less than an initial thickness of the thrust bearing.

Abstract: The present invention provides an improved seal cage which is useful, for example, for injectable sealing compound systems. In preferred embodiments the dimensions of the seal cage can be adjusted for use of the seal cage with shafts of different diameters and stuffing boxes of varying depths.

Abstract: A hydraulic pump system is provided with a leakage fluid reclamation sub-system having connected eductor and fluid line elements that function to return hydraulic fluid leaked from around the system drive shaft to the reservoir of the hydraulic fluid pump.

Abstract: A configuration for sealing a gap 38 between two mutually concentric machine parts 31, 36 which move relative to each other exhibits a sealing ring 10 in the groove 32 which is mounted in spatially fixed fashion in machine element 31. The machine element 36 moves relative to the machine element 31. The sealing ring 10 in accordance with the invention is flexible in response to radial and axial forces acting on the sealing ring. The pressure dependent deformation of the sealing ring 10 is reversible, i.e. the sealing ring 10 automatically returns to its original shape for decreased fluid pressure on the high pressure side H.