151results about How to "High sealing pressure" patented technology

Cushions for respiratory face masks have a frame-connecting portion, a face-contacting portion, and a gusset portion disposed between and joining the frame-connecting and face-contacting portions. The gusset portion preferably includes at least one perimetrical region which having a laterally projecting exterior gusset section and a laterally projecting interior gusset section. According to one aspect, the laterally projecting exterior and interior gusset sections are disposed about the entire perimeter to the gusset portion so as to establish a substantially constant widthwise dimension thereof about the gusset's entire perimeter.

A sealing assembly for a cable to apparatus interconnection formed bya plurality of shells adapted to mate together, surrounding the interconnection within an interconnection space. When mated together, the shells forming openings for the cable and the apparatus at an apparatus end and a cable end, respectively. A gasket mounted to each shell along a mating surface between the shells and along the openings environmentally seals the interconnection space. A locking rib projecting inward from the shell(s) may be applied to rotationally interlock a coupling nut of the interconnection with the sealing assembly. In a two shell embodiment, a locking band positioned around an outer diameter of the mated together shells with an end to end retaining means may be used to secure the shells together. Alternatively, if three shells are used, the shells may be hinged together and a retaining means applied to join the unhinged ends together.

An ANSI Leakage Class V control valve having consistent shut off characteristics with a reduced actuator force required to open and close the valve is provided. The trim arrangement of the control valve includes a valve cage having a multi-contoured inner surface. The multi-contoured inner surface can include a plurality of surfaces. The multi-contoured surface can include first, second, and third perimeter surfaces, and a first transition surface disposed between and coupling the first and second perimeter surfaces, and a second transition surface disposed between and coupling the second and third perimeter surfaces. The valve also includes a valve plug disposed at one end of a valve stem. The valve plug controls the fluid flow through the valve. The valve plug includes an opening through the plug for equalizing pressure across the valve plug. An annular channel is formed within a wall of the valve plug and is sized to accommodate a sealing ring. The sealing ring engages the second perimeter surface to form a fluid seal that substantially hinders fluid leakage through the valve.

A multicomponent cartridge, particularly a two-component cartridge, contains a coaxial outlet with an outer outlet tube and an inner outlet tube concentric to the outer tube. A cap detachably connected to the coaxial outlet. A seal with at least one seal flange is arranged on the cap for contact on the inner and/or outer outlet tube. A simplified and improved seal is thus enabled, such that the seal includes at least one laterally projecting sealing edge, which extends around the inner and/or outer side of the inner and/or outer outlet tube of the coaxial outlet and/or on the side of the one or more seal flanges facing the outer and/or inner side of the inner and/or outer outlet tube.

The invention discloses a high-pressure controllable slide-valve type mechanical combined sealing system. The system comprises a controllable slide valve stationary seal assembly and a rotating mechanical seal assembly; the controllable slide valve stationary seal assemble comprises a slide valve gland (13), a slide valve (11) and a tapered shaft sleeve (12) sheathed on a shaft shoulder, the tapered shaft sleeve (12) is positioned inside the slide valve gland (13), the slide valve (11) which is partially positioned in a flange (16) is hermetically connected with the tapered shaft sleeve (12) in a sliding way, and the flange (16) is provided with a pressure source channel I (161) and a pressure source channel II (162) which are respectively used for controlling the slide valve (11) to slide leftwards or slide rightwards; the rotating mechanical seal assembly comprises a rotating seat (9) which is fixedly connected with a shaft sleeve (10), a rotating ring (17) and a stationary ring (7) which are closely jointed on a seal face and the like. The sealing system can help greatly reduce and avoid leakage of dangerous fluid and serious accidents.

In an attachment structure of a gasket for a refrigerant-seal, both first and second connection members are disposed to define a seal space by first and second opposite surfaces and first and second wall surfaces, and the gasket having a beam portion is disposed in the seal space so that one end surface of the gasket is held on the first wall surface of the first connection member and the other end surface of the gasket is separated from the second wall surface of the second connection member by a predetermined clearance, before both the first and second connection members are fastened. After both the first and second connection members are fastened, the gasket extends, and the other end surface of the gasket press-contacts the second wall surface.

A linerless closure for use on an associated container includes a unitary, one-piece closure body having a top wall portion, and an annular skirt portion depending from the top wall portion. The closure includes an annular, outer seal element which depends from the top wall portion for sealing engagement with a generally outwardly facing surface of the associated container. The closure includes an inner, plug seal element depending from the top wall portion for sealing engagement with a generally inwardly facing surface of the container. Notably, the closure includes a discontinuous pressure block in the form of a plurality of circumferentially spaced, seal reinforcement elements on the inside surface of the skirt portion, adjacent the top wall portion. The reinforcement elements are engageable by the outer seal element to limit outward deflection of the outer seal element, to enhance sealing cooperation with the associated container.

The invention relates to the field of pressure vessels, and aims to provide a pressure vessel door quickly-opened device with a leakage on-line detection function. The device comprises a barrel flange, a cover flange and a locking clamp, wherein the barrel flange is welded with a vessel barrel, the cover flange is welded with a cover, and the locking clamp is used for fixedly connecting the barrel flange and the cover flange; the flange surface of the barrel flange is provided with three circles of grooves which sequentially include a first sealing groove, a gas detecting groove and a second sealing groove from outside to inside, and a lip-type sealing ring is respectively placed in the first sealing groove and the second sealing groove; and the barrel flange is provided with a gas inlet and a medium sensor, wherein the gas inlet is respectively connected to the first sealing groove and the second sealing groove and used for importing sealing gas, and the medium sensor is communicated to the gas detecting groove. The device disclosed by the invention is convenient to assemble and disassemble, saves the cost, prolongs the service life, and ensures the success rate of vessel sealing; the gas detecting groove can detect the gas leakage of the insides of vessels; and the economic loss caused by suddenly stopping the operation of the vessels can be avoided.

A sealing station for a packaging machine for sealing a foil on to a packaging tray is provided. The sealing station comprises a sealing tool whereby the sealing tool is configured to apply a sealing force for sealing on to the foil and the packaging tray. The sealing tool includes an upper tray holding fixture and a lower tray holding fixture that are arranged at different heights, whereby each is configured for holding at least one packaging tray.

A sealing assembly for a cable to apparatus electrical interconnection. The assembly having a unitary cylindrical gasket, the outer diameter of the cylindrical gasket provided with an insertion opening to an interconnection cavity; the insertion opening having a generally circle sector shape at a cable end and an apparatus end, the insertion opening extending between the cable end and the apparatus end along the outer diameter. A generally C-shaped outer shell is dimensioned to seat along the outer diameter, the outer shell having outward protruding edge lips aligned with the insertion opening along the outer diameter. The edge lips movable towards one another to a closed position wherein the insertion opening is closed around the electrical interconnection; and means for retaining, such as a locking bar that fits over the edge lips.

A processing chamber having an improved sealing means is disclosed. The processing chamber comprises a lower element, an upper element, and a sealing means that tightly holds the lower element to the upper element to define a processing volume that is maintained using the minimum pressure necessary. The processing chamber comprises a plate having a first face that forms the processing volume and a second, opposing face that forms a seal-energizing cavity. In one embodiment, a surface area of the first face is smaller than a surface area of the second face. When the same pressure is applied against both the first face and the second face, the force on the second face is greater than the force on the first face, resulting in a sealing force exceeding a processing force generated within the processing volume.

The invention belongs to the technical field of petroleum drilling support equipment, and discloses a blowout preventer ram. According to the technical scheme, the blowout preventer ram comprises a circular-arc elastic sealing rubber body with baffle plates at two ends, wherein the sealing rubber body can be fixed to a shell through positioning pins on the baffle plates; and the upper and lower sides of the elastic sealing rubber body are respectively provided with an exposed framework formed by lapping six sector metal plates. The sealing diameter of the blowout preventer ram is variable within a certain range, so that drill rods with different specifications and dimensions can be sealed by one pair of rams with diameter varying functions, the number of used rams is reduced, the operation process of replacing rams is omitted, and the working efficiency is improved.

A low-friction high-voltage rotary vane motor based on the self-compensation composite sealing technology relates to a rotary vane motor. The rotary vane motor solves the problems of the prior rotary vane motor that: sealing between a moving vane and a stator and between the stator and a casing is realized through cast iron sealing strips, thereby resulting in poor sealing performance and small sealing pressure and restricting the application of rotary vane motor in highpower steering engine. The rotary vane motor comprises the following structure that: two one-way group valves are respectively arranged inside two first valve spools at both side faces of a moving vane; two sealing strips are respectively arranged inside two first straight grooves; a rotor body and a component of a sliding bearing are arranged on a thrust bearing inside a casing; one side of a stator is fixed on the inner side wall of the casing, while the other side is adhered to a rotor shaft; a lower end cap is arranged on the lower end face of the casing; the two one-way group valves are respectively arranged inside two valve spools on both side faces of the stator; and the two sealing strips are respectively arranged inside two second straight grooves. The low-friction high-voltage rotary vane motor adopts the one-way group valves and the sealing strips to realize radial seal, and has reliable sealing property and greater pressure, thereby enlarging the application range of rotary vane motor.

The invention discloses a double-cylinder compression packer. The double-cylinder compression packer comprises a center pipe. The center pipe is sequentially sleeved with an upper connector, an upper hydraulic cylinder, an upper starter, an upper piston, an upper impelling ring, an upper moving ring, an upper pressing ring, an upper rubber barrel, a spacer ring, a lower rubber barrel, a lower pressing ring, a lower moving ring, a lower impelling ring, a lower piston, a lower starter, a lower hydraulic cylinder and a lower connector from top to bottom. Instant impact force in the setting process of the compression packer is buffered by arranging end portion copper rings and elastic steel rings at the two ends of the upper rubber barrel and the two ends of the lower rubber barrel to prevent parts of the compression packer from being damaged by the instant impact force so that sealing pressure of the upper rubber barrel and the lower rubber barrel on a casing pipe is more even, and the service life of the compression packer is prolonged. Because a saw-tooth-shaped structure is arranged on the center pipe, the upper rubber barrel and the lower rubber barrel can be effectively prevented from wriggling in the working process. Rubber barrel frameworks are arranged on the upper rubber barrel and the lower rubber barrel in a sulfuration mode and are provided with saw-tooth-shaped structures, so that the upper rubber barrel and the lower rubber barrel are prevented from being damaged in the setting and sealing processes of the compression packer, and the elastic restoring force of the upper rubber barrel and the elastic restoring force of the lower rubber barrel are increased in the release process of the compression packer.

The invention relates to a low temperature resistant butterfly valve and belongs to the technical field of fluid control valves. The low temperature resistant butterfly valve comprises a valve body (1); a butterfly plate (2) is arranged on the valve body (1) in a bias mode through a valve rod (3); the butterfly plate comprises a flow channel opening device and a flow channel closing device which deflect around the axis of the valve rod; one end of the butterfly plate, which is far away from the valve rod, comprises a peripheral chamfer; the position of the peripheral chamfer of a flow channel, which is corresponding to the closed position of the butterfly plate, comprises a sealing clamping groove; a U-shaped cross section of low temperature resistant non-metal sealing ring (4) with the circular arc end adhered to the chamfering surface of the butterfly plate of the low temperature resistant butterfly valve is inserted into the sealing clamping groove; a spring ring (5) and a supporting ring (7) are embedded into the non-metal sealing ring; the trend that the circular arc end is adhered to the chamfering surface is kept due to the spring ring (5); the two outer sides of the U-shaped cross section are adhered to the wall of the sealing groove due to the supporting ring (7). According to the low temperature resistant butterfly valve, the sealing ring is adhered to the butterfly plate in a sealing mode under the action of contraction of the spring ring and accordingly the reliable effective sealing under the ultra-low temperature conditions can be ensured.

The invention discloses an immersion self-adaptive sealing control device used in a lithography machine. The immersion self-adaptive sealing control device is arranged between a projection lens set and a substrate, and consists of a sealing element and a self-adaptive sealing member. When liquid forms the impact on the self-adaptive sealing member due to traction of the substrate, the device can absorb the impact formed by the high-speed moving liquid and converts the impact into power enhancing sealing; on the contrary, when the substrate draws the liquid away from the self-adaptive sealing member, the liquid prestored inside the device follows to enter a slit flow field to avoid gas bubble entrainment owing to the loss of the liquid at the boundary, meanwhile, the reduction of the liquid prestored inside the device reduces the sealing power of the self-adaptive sealing member, and the leaked liquid flows back to the inside of the slit flow field along with the substrate due to the reduction of obstruction. The liquid transmission mode of the immersion self-adaptive sealing control device adopts negative pressure recovery and free flow of a fluid injection end, which avoids the flow field fluctuation caused by the in-coordination between the injected fluid and the recovery pressure.

The invention discloses a method for arranging a shock-absorbing convenient-to-install self-locking nut on a thin-walled plate and a nut assembly. The method is characterized in that one or more than one pressing groove is punched on the external sides of bent parts of a right-angle supporting plate before the right-angle supporting plate is bent, the microstructure of the bent parts of the right-angle supporting plate is enabled to be finer due to the pressing groove, the problems of loose material and internal stress increase caused during the bending of the right-angle supporting plate are reduced, and the material resilience and deformation caused after the right-angle supporting plate is bent can be effectively controlled. The nut assembly comprises the right-angle supporting plate (1) and the self-locking nut (2) which is connected with the right-angle supporting plate (1). One or more than one pressing groove (3) is arranged on the external sides of the bent parts of the right-angle supporting plate (1). By adopting the method, the antifatigue performance is improved and the problem that the self-locking nut cannot be used on thin-walled parts, narrow parts which are hard to approach or non-open structures of airplanes is solved. The method and the nut assembly provided by the invention have the advantages that not only can the manufacturing difficulty of bearing and connecting components be reduced, but also the weight can be reduced, the production process becomes rapid and simple, the safety and the reliability are high and the maintenance is convenient to conduct.

The invention discloses a low-temperature-resistant air spring upper seam allowance sealing structure. The sealing structure comprises an upper cover plate, a buckle ring, a connecting bolt and an upper seam allowance; the upper seam allowance is compressed between the upper cover plate and the buckle ring, the buckle ring and the connecting bolt are arranged on the radial outer side of the upperseam allowance, a bag body below the upper seam allowance is attached to the inner wall of the buckle ring and is attached to the bottom surface of the buckle ring downwards; a sealing structure formed by radial sealing and axial seal which are arranged alternately and connected in sequence is adopted between the upper cover plate and the upper seam allowance and between the upper seam allowance and the buckle ring, the sealing pressure of at least one axial sealing surface of the upper seam allowance to the upper cover plate faces the inner direction which is away from the connecting bolt, and the sealing pressure and the compression amount of the upper seam allowance are increased along with the loading and the displacement of the air spring. The sealing reliability of the upper seam allowance of the air spring in the loading process is guaranteed, effective sealing of the upper seam allowance in a low-temperature state is realized, and the sealing requirement of the air spring underthe low-temperature state is met. The invention further provides a low-temperature-resistant air spring upper seam allowance sealing method and a low-temperature-resistant air spring.