Abstract: The specification discloses an isolation gate valve (10) for controlling flow of a particulate type material of a dry or semi dry nature including ore and coal, the gate valve (10) having a support frame (11), at least one slidable blade member (20, 21) movably mounted relative to said support frame (11) to selectably open or close a material flow opening (12) defined by said support frame (11), one or more actuators (22, 23) provided to drive the slidable blade member or members (20, 21) between open or closed positions, the or each said slidable blade member (20, 21) having a forward leading edge region (27, 28) adapted, in use, to transversely extend across the material flow opening (12).

Abstract: Resilient elongated tubular seals that are flexible and that comprise selected geometric cross-sections and that can absorb compressive forces to seal gaps between adjacently positioned aircraft cabin structure and that can further expand outwardly as compressive forces change or abate and methods of installation of such tubular seals are disclosed.

Abstract: A display apparatus including a sealing member having an improved structure, the display apparatus includes a housing including an opening, a display module including a display panel, the display module arranged inside the housing for the image to be displayed through the opening, a housing cover coupled to the housing to cover the opening while covering a rear surface of the display module, and a sealing member provided to seal a gap between the housing and the housing cover, the sealing member including a contact surface convexly formed toward the housing cover and a first protrusion and a second protrusion arranged on the contact surface, wherein at least a portion of the contact surface located between the first protrusion and the second protrusion is located at a same level as the first protrusion and the second protrusion or protrudes outward of the first protrusion and the second protrusion.

Abstract: A windshield and a cowl louver are reliably connected together by effectively absorbing an error in shape or dimension of each of laminated glass, a clip and the cowl louver. A cowl louver includes a body portion, a first protrusion portion, an engageable portion, and a second protrusion portion. A clip in a plate shape includes a first plate portion, a second plate portion, a first bent portion, a third bent portion, a second bent portion and an engaged portion such that the second bent portion and the first protrusion portion are at least partly brought into contact with each other, and the engaged portion and the second protrusion portion are at least partly brought into contact with each other.

Abstract: A downhole tool including an insertion member arranged to insert into and form an annular seal with a receiving member using an annular seal assembly. The seal assembly includes a compliant metal spring and a separate metal cover overlapping at least a portion of an outside of the spring, wherein the cover and spring extend radially outward from the downhole tool so as to be compressed when the insertion member is inserted within the receiving member to form an annular metal-to-metal seal between the insertion member and the receiving member. A method of coupling the downhole tool and the receiving member in a well includes inserting the insertion member of the downhole tool into the receiving member and energizing and forming an annular metal-to-metal seal by compressing the seal assembly between the insertion member and the receiving member when inserting the insertion member into the receiving member.

Abstract: A protection system for preventing foreign material from lodging in a channel between and/or damage to adjacent ceramic core features during a core processing operation is disclosed. The system includes a gasket sized and shaped to self-lock within the channel and prevent foreign material from lodging within the channel during the core processing operation. A method may include determining a geometrical characteristic of the channel and adjacent ceramic core feature; fabricating a gasket to fit and self-lock within the channel; positioning the gasket within the channel; and performing the core processing operation. The gasket prevents the foreign material from lodging in the channel, reducing subsequent damage to the ceramic core compared to the channel without the gasket.

Abstract: A fire seal structure prevents flame from coming out of a fire-prevention region of an aircraft. The fire seal structure includes: a plurality of walls including: a first wall provided on a first partitioning member; and a second wall provided on a second partitioning member. One of the plurality of walls is a spring wall that functions as a spring. The first and the second partitioning members define the fire-prevention region. The plurality of walls forms a labyrinth-shaped gap between the first and the second partitioning members. Each of the plurality of walls contains a refractory material and includes a front end part. When the first and the second partitioning members are stationary with respect to each other, the front end part is not in contact with another member, and the spring wall is disposed closest to a facing member, among the plurality of walls.

Abstract: A fan duct seal for a gas turbine engine has at least one seal body with a hollow center. A first opening is formed in the seal body that is in fluid communication with the hollow center. The first opening is configured to receive fan air flow. A second opening is formed in the seal body that is in fluid communication with the hollow center such that cooling flow enters the first opening, moves through the seal body and exits from the second opening. A fan duct for a gas turbine engine and a method of cooling a fan duct seal assembly are also disclosed.

Abstract: A squeeze film damper bearing assembly includes a bearing and a squirrel cage radially outward of and supporting the bearing. The squirrel cage includes a first piston ring groove, a second piston ring groove, and a first pocket connected to the first piston ring groove. The squeeze film damper bearing assembly also includes a first piston ring configured to fit into the first piston ring groove. The first piston ring includes a first end circumferentially spaced apart from a second end and an ear configured to fit into the first pocket to prevent the first piston ring from rotating in the first piston ring groove. The squeeze film damper bearing assembly also includes a second piston ring configured to fit into the second piston ring groove and a stationary housing radially outward of the squirrel cage.

Abstract: A method for inhibiting diffusion of gases and/or transmission of photons through elastomeric seals and a diffusion inhibiting elastomeric seal wherein at least a portion of the surface of a diffusion inhibiting elastomeric seal is coated with a compatibly-deformable, malleable metal coating.

Abstract: Embodiments of a seal having a variable elastic modulus are provided herein. In one embodiment, a seal having a variable elastic modulus includes: a body fabricated from an elastomeric material; a channel formed within the body; a tube disposed within the channel, the tube comprising a plurality of interwoven fibers; and an inlet formed in an outer surface of the body, the inlet fluidly coupled to an inner volume of the tube.

Abstract: The invention relates to an arrangement (10) for sealing off a joint area (1) between a first joint partner (20, 200) and a second joint partner (30, 300) by means of at least one elastic sealing element (18, 180) disposed between a first sealing surface (12.1) of the first joint partner (20, 200) and a second sealing surface (12.2) of the second joint partner (30, 300), and an associated method for sealing off the joint area (1) between a first joint partner (20, 200) and a second joint partner (30, 300). According to the invention, at least one reservoir (14) for an anticorrosion agent (16) is introduced in a sealing zone (11) of the first and/or second sealing surface (12.1, 12.2), wherein the sealing element encloses the reservoir (14) together with the first and/or second sealing surface (12.1, 12.2).

Abstract: Example flexible face panels for dock shelters and dock seals at a loading dock are disclosed herein. An example seal assembly comprises a face panel to be coupled to a projection panel, where the face panel has a front side, a back side and an edge spaced apart from the projection panel. A bulb is positioned adjacent the edge of the face panel. A seal flap is attached to the bulb such that the seal flap projects from an outer surface of the bulb and toward a doorway of a loading dock when the seal assembly is coupled to a wall of the loading dock.

Abstract: An elastic seal for a building joint which includes internal walls or dividers which change orientation when the seal is compressed for placement into the building joint. The change in orientation allow for the seal to apply a relatively uniform force against the joint walls extending from the bottom wall to the top wall of the seal. Additionally, the change in orientation reduces the deflection of the top wall of the seal upwardly when compressed in the building joint. The walls also become more vertically oriented when the seal in compressed. This vertical orientation provides increased load support for the top wall when the seal is compressed into a joint.

Abstract: An increased resilience seal utilizing a sealed gas filled inner chamber in a bellows spring that functions as both a mechanical spring and a gas spring to provide a more constant level of separation force between two face plates to provide a seal between two mechanical components such as those found in an aircraft jet engine. The bellows spring is made of a plurality of walls that are joined together in a pressurized chamber that is filled with a gas, such as an inert gas. In alternative embodiments, the bellows spring is made of walls that are shaped and oriented to optimize the operating characteristics of the bellows spring when the pressure is increased in a sealed inner chamber in response to elevated temperature. In one embodiment, the walls forming a portion of the chamber overlap to optimize the geometry of the bellows spring.

Abstract: A device (100) for closing an opening in a room has a frame (102) in the reveal of the room opening and at least one leaf (104) which is arranged movably with respect to the frame (102) and is movable with respect to the frame into a closure position in which there is, between the frame (102) and the leaf (104), a gap (112) which can be sealed by means of a deformable and/or movable sealing member (114). A sealing member actuating device (120), by means of which the sealing member (114) can be deformed and/or moved, is arranged in the frame (102) and/or in the leaf (104) in order to seal the gap (112).

Abstract: The present invention relates to seal apparatus, the apparatus comprising a resilient elongate strip having a substantially U-shaped cross-section forming an apex from which depends a pair of walls, the apex of the U-shape forming a compressible bulb element, wherein opposing surfaces of the walls have inter-engaging formations for holding them in position.

Abstract: A protective gasket for a display module of a portable electronic device and a method for assembling the device. The electronic device includes a housing frame, a main body having a display module, and a flexible gasket between the frame and main body, the frame having a display window corresponding to the display module. A cut is at corner portions of the gasket so that inner edges of the flexible gasket are bent after the display module is embedded into the display window, and then compressed and fitted between the outer periphery of the display module and the inner periphery of the display window. With the inner edges of the flexible gasket bent, the thickness of the electronic device can be reduced, and the periphery of the display module can be protected. The display module also can be protected from intrusion by foreign matters such as dust and moisture.

Abstract: An annular sealing element to seal between metal surfaces for use in flanges, joints, packers and the like, located in oil and gas exploration and production equipment. The sealing element has inner and outer metal deformable surfaces joined at ends, defining an interior volume which is entirely filled with a plastic deformable material. The surfaces are arranged such that on compression of the element from the ends, the element will deform in a controlled manner on a cantilever principle. The volume of filler and the interior volume remain substantially equal during compression so that delamination does not occur. Thus the sealing element provides a seal combining the flexibility of elastomer seals with the integrity of a metal to metal seal.

Abstract: A sealing assembly for a liquid conveying system includes a first structure defining an aperture, such as a pipe receiving aperture. A second structure, such as a pipe is received in the aperture. And an annular seal is disposed within the aperture for radially sealing between the first structure and the second structure. The seal includes an outer radial portion embedded in the first structure and an inner radial portion in sealing engagement with the second structure. The inner radial portion defines an internal cavity containing a substantially incompressible fluid or gel that is movable within the cavity to provide a dynamic seal with the second structure.

Abstract: A thermal bulb seal has a bulb portion and a tab portion that is configured to allow welding or other attachment of the bulb seal to the end surface of an insulating structure. Most preferably, the tab portion comprises an angled portion so allow welding of the bulb seal to another insulating structure.

Abstract: Tunable fluid end embodiments comprise a family, each family member comprising a pump housing with at least one installed tunable component chosen from: tunable valve assemblies, tunable valve seats, tunable radial arrays and/or tunable plunger seals. For example, a tunable valve assembly or tunable radial array selectively attenuates valve-generated vibration at its source, thus reducing the likelihood of fluid end failures associated with fatigue cracking and/or corrosion fatigue. Adding tunable valve seats and/or tunable plunger seals to a fluid end facilitates optimal damping and/or selective attenuation of vibration at one or more predetermined (and frequently localized) fluid end resonant frequencies. Thus, the likelihood of exciting destructive resonances in a pump's fluid end housing is further reduced.

Abstract: A thermal bulb seal has a bulb portion and a tab portion that is configured to allow welding or other attachment of the bulb seal to the end surface of an insulating structure. Most preferably, the tab portion comprises an angled portion so allow welding of the bulb seal to another insulating structure.

Abstract: Tunable fluid end embodiments comprise a family, each family member comprising a pump housing with at least one installed tunable component chosen from: tunable valve assemblies, tunable valve seats, tunable radial arrays and/or tunable plunger seals. For example, a tunable valve assembly or tunable radial array selectively attenuates valve-generated vibration at its source, thus reducing the likelihood of fluid end failures associated with fatigue cracking and/or corrosion fatigue. Adding tunable valve seats and/or tunable plunger seals to a fluid end facilitates optimal damping and/or selective attenuation of vibration at one or more predetermined (and frequently localized) fluid end resonant frequencies. Thus, the likelihood of exciting destructive resonances in a pump's fluid end housing is further reduced.

Abstract: A tunable valve assembly reduces valve-generated vibration. One embodiment comprises a valve body and valve seat having substantially collinear longitudinal axes. A rebound characteristic frequency is associated with rebound of the elastic valve body base plate from forceful contact with the valve seat. A central cavity in the valve body encloses a spring-mass damper optionally immersed in a dilatant liquid and having a damper resonant frequency approximating a pump housing resonance. A lateral support assembly adjustably secured to the valve seat has a support resonant frequency designed in conjunction with the rebound characteristic frequency and the damper resonant frequency. Combined hysteresis heat loss associated with the above three vibration frequencies is reflected in lower closing energy impulse amplitude and damping of associated vibrations.

Abstract: A sealing apparatus of a touch panel provided in a portable terminal including a body and the touch panel, wherein the sealing apparatus is attached and coupled to a coupling area between the body and the touch panel to seal the coupling area while the touch panel is suspended over the body by a resilient member.

Abstract: A sealing member and a battery comprising the sealing member are provided. The sealing member comprises a sealing part, an operation part having a supporting portion, an operation protrusion disposed on an upper surface of the supporting portion, and a deformable leg depending from a bottom surface of the supporting portion. The sealing member also comprises a connecting part connecting the sealing part and operation part. The sealing part has a maximum diameter greater than that of the connecting part.

Abstract: Mounting rings and methods for mounting structures to shafts are provided. The rings and methods may be used to mount other rings or housings to a shaft. The rings are characterized by having flexible inner diameters that can deflect under a radial load. The radial deflection of the inner diameter permits the rings to deflect and engage an outer diameter of a shaft. The engagement of the rings with a shaft provides at least some resistance to movement, for example, rotation and/or axial displacement, of the shaft relative to the ring and structure. In one aspect, the ring has a closed, hollow, construction, for example, a circular, oval, or polygonal closed, hollow construction. The ring may include a plurality of indentations, such as slots, on the inside diameter of the ring that may relieve at least some of the circumferential stress in the ring. Methods for using the rings to mount a structure to a shaft are also disclosed.

Abstract: Stackable lids for a container each include a top surface facing generally in a first direction and a bottom surface opposite the top surface and facing generally in a second direction. Pivotable wing portions extend from each side edge of the lid and each pivotable wing portion is joined to its respective side edge by a hinge. The wing portions are moveable between engaged and disengaged positions, and an inner surface of each wing includes a tab member configured for detent engagement with a rim of the container. The lid also includes corner portions extending between the side edges. Each corner portion includes a skirt portion extending generally in the second direction. Each corner portion also defines a recessed shoulder configured to receive the skirt portion of another when the lids are stacked.

Abstract: Apparatus and methods are provided to minimize the escape of fuel out of a fuel tank when a tank wall is penetrated by a bullet. In one embodiment, a pressure differential may be maintained between a pressure within a fuel tank cavity and another pressure outside the fuel tank cavity in order to minimize the loss of fuel upon penetration of the fuel tank. In another embodiment, a compressed rubber layer of fuel-reactive rubber may be provided which is adapted to be attached to a fuel tank wall and to swell upon contact with fuel in order to substantially seal a penetrated hole in the fuel tank wall.

Abstract: An apparatus for controlling fluid flow in a borehole in an earth formation includes: a carrier configured to be deployed in the borehole; and a sealing device including at least one deformable element disposed at the carrier, the deformable element configured to have a first position and a second position, the first position forming a void in the sealing device configured to retain a flowable sealing material therein, the second position causing the void to be in flowable communication with leak paths formed in at least one of the sealing device and the borehole.

Abstract: A multifunction ring symmetrical about a longitudinal axis has an elastomeric body, first and second ends, and inner and outer surfaces. The elastomeric body totally encloses at least one pair of longitudinally-spaced circumferential tubular cavities, each pair of cavities being mutually connected via a fluid flow restrictor and substantially filled with at least one fluid medium. Each fluid flow restrictor is responsive to longitudinal compression of the elastomeric body, and the fluid medium facilitates heat conduction, vibration damping, extrusion blocking and/or fluid pressure transmission. Longitudinal compression of a multifunction ring on a pump pressure stroke increases tubular cavity fluid pressure and causes substantially symmetrical radial ring expansion. Radial ring expansion is both inward and outward, thus reducing fluid flow resistance in the fluid flow restrictor.

Abstract: An apparatus and method for retaining an inflatable seal comprising a channel having a closed end and a pair of projecting legs. A plurality of spaced apertures in each of the projecting legs extend parallely along a longitudinal axis of the channel. A plurality of nuts align with the corresponding plurality of spaced apertures and an inflatable seal is disposed within the channel. A pin is disposed within each aperture, wherein each of the pins has a threaded portion threadingly engaging one of the nuts and a non-threaded portion projecting towards the neck to dispose the foot intermediate the pins and the closed end.

Abstract: Pressurized rotary machine comprising a canned or sleeved assembly of which the electrical connections are connected to the outside of the machine by an electric supply duct, the electrical connections passing from the canned or sleeved assembly to the outside via the electric supply duct by passing in succession through first, second and third hermetically sealed bushings, none of these hermetically sealed bushings through which the electrical connections pass being exposed to a pressurized gas.

Abstract: Rotating pressure distributor (I) for a carousel-type machine for treating hollow bodies in a plurality of identical treatment stations, comprising two rings, (2) fixed and (3) rotating, in sealing contact, the ring (3) having orifices (6) each adapted for being connected to a station and opening onto the contact face (5) thereof, the ring (2) having at least one aperture (7) which may be connected to a pressure source and opening onto the contact face (4) thereof by being on the trajectory of the orifices (6); grease is spread between the contact faces (4, 5) of the two rings (2, 3) to provide the seal; at least one annular channel (13) covers the annular opening (19) of the joint plane (P) and is connected to the atmosphere; in the channel respective flanges (14) are mutually interlaced without contact with one another, forming chicanes; the channel is filled with grease.

Abstract: A multifunction ring comprises an elastomeric body which totally encloses at least one circumferential tubular cavity filled with at least one liquid medium. In various ring embodiments the liquid medium conducts heat, damps vibration, blocks extrusion and/or transmits hydraulic pressure. When one or more rings are used in a plunger packing, longitudinal compression of the ring(s) secondary to increased pumped fluid pressure occurs during a pressure stroke. Such compression, acting through the compliance of each ring, increases tubular cavity hydraulic pressure and causes radial ring expansion. Ring expansion is both inward toward a plunger and, simultaneously, outward toward its packing box. Inward expansion tends to seal the extrusion gap, while outward expansion increases coupling from plunger to packing box to increase vibration damping and/or heat scavenging. Periodic reduction of pumped fluid pressure tends to reverse radial ring expansion, thus reducing both frictional ring wear and heat generation.

Abstract: A water leakage-proof apparatus aims to be firmly held between a shaft and a fixed surface to maintain water leakage-proof effect of the fixed surface and the surrounding of the shaft to prevent external water from flowing along the shaft into chinks around the shaft to form water leakage. The water leakage-proof apparatus includes a casing which has an orifice and an opening at one side. The water leakage-proof apparatus is coupled on the shaft through the orifice so that the opening covers the fixed surface. The water leakage-proof apparatus holds waterproof powder inside to achieve water leakage-proof effect.

Abstract: One or more multifunction elastomeric plunger seal rings augment a plunger packing assembly within a plunger pump packing box. Each such ring comprises a totally-enclosed circumferential tubular cavity. The cavity is filled with a dilatant liquid which transmits hydraulic pressure throughout the tubular cavity and simultaneously damps pump vibration transmitted via the packing box. Pump pressure strokes increase tubular cavity hydraulic pressure, resulting in radial ring expansion forces both inwardly toward a plunger and outwardly toward its packing box. Inward ring expansion tends to close the extrusion gap, while outward expansion force improves heat transfer from plunger to packing box. Outward expansion force also increases coupling of packing box vibration to hysteresis loss in the dilatant liquid.

Abstract: One or more elastomeric multifunction rings augment a plunger packing assembly within a plunger pump packing box. Each such ring comprises a totally-enclosed circumferential tubular cavity filled with a fluid medium which transmits hydraulic pressure throughout the tubular cavity. Longitudinal ring compression secondary to pumped fluid pressure acts through the compliance of each ring to increase tubular cavity hydraulic pressure, resulting in radial ring expansion. Ring expansion is both inward toward a plunger and, simultaneously, outward toward its packing box. Inward expansion tends to seal the extrusion gap, while outward expansion improves heat transfer via the ring from plunger to packing box. Periodic reduction of pumped fluid pressure tends to reverse radial ring expansion. Thus, relatively more effective sealing and heat transfer functions occur as a pump's pressure stroke increases pumped fluid pressure.

Abstract: An annular sealing element to seal between metal surfaces for use in flanges, joints, packers and the like, located in oil and gas exploration and production equipment. The sealing element has inner and outer metal deformable surfaces joined at ends, defining an interior volume which is entirely filled with a plastic deformable material. The surfaces are arranged such that on compression of the element from the ends, the element will deform in a controlled manner on a cantilever principle. The volume of filler and the interior volume remain substantially equal during compression so that delamination does not occur. Thus the sealing element provides a seal combining the flexibility of elastomer seals with the integrity of a metal to metal seal.

Abstract: The present invention is directed to a specially configured seal system which provides a barrier to gas leakage flow between a pressurized module and its external environment. The seal includes a shroud covering which protects the sealing interface from its environment when not in use, and retracts to expose the sealing interface when mated. The seal system is constructed and arranged to mate with a seal of identical construction and arrangement or to mate with a flat surface.

Abstract: A cylinder block plating apparatus preplates or plates a cylinder bore of each cylinder in a cylinder block of a multi-cylinder engine using a process liquid introduced into the cylinder bore in a condition of sealing an end of the cylinder bore when a communication hole is formed at the end of the cylinder bore, the cylinder block plating apparatus includes a sealing jig including a sealing unit including a cylinder bore seal for sealing the end of an inner peripheral surface of the cylinder bore and a communication hole seal for sealing a portion, near a communication hole, opposite to the cylinder inner peripheral surface, and a clamping unit disposed in the sealing unit to be pushed open and adapted to cause the communication hole seal to seal the portion located on the opposite side of the cylinder bore near the communication hole.

Abstract: Gaskets are provided for use in gas exchange measurement systems used for photosynthesis, respiration and transpiration measurements. Novel gaskets and gasket designs are provided, including composite gasket designs, along with corresponding construction techniques, which effectively provide low diffusion through bulk material, significant reductions in interfacial diffusion, sufficient compliance to conform to surface irregularities under low applied stresses, and/or low sorption properties, particularly of H2O vapor.

Abstract: A plug to hermetically seal an aperture in a sheetmetal, or in the floor of a vehicle, comprising, a cap covering the aperture and comprising an external, circumferential flange resting on one side of the sheetmetal or of the floor and fitted with a first circumferential seal, an affixation portion entering said aperture and, a second circumferential seal configured at the cap or at the affixation portion and being a distance from the first seal and resting against the sheetmetal or the said floor, a cavity being subtended by the sheetmetal or said floor, the two seals and at least one wall of the plug, where said plug, includes a pressure-compensating chamber, which communicates with the cavity and, which compensates a change in pressure, caused by a change in temperature, inside the cavity, by changing the volume of the pressure-compensating chamber.

Abstract: A sealing arrangement (1) for a pivotally arranged boat drive in a hull of a boat, the boat drive extends through a hull opening in the bottom of the boat. The boat drive forms, together with the hull of the boat or with a connecting piece (2) set into the hull of the boat, an annular gap. The annular gap is bridged by at least two flexible sealing elements (5, 6), and the at least two sealing elements (5, 6) enclose at least one ring chamber (7) between them.

Abstract: A seal assembly is configured to seal a tile gap between a pair of tiles. Each of the tiles may include a tile side surface. At least one of the tiles may include a groove which may be formed along a length of the tile side surface. The seal assembly may comprise a gasket assembly including first and second bulb portions which may be interconnected by a web. A spacer rope may be positionable along the web. The gasket assembly may define a folded configuration for mounting within the tile gap when the web is wrapped around the spacer rope such that the second bulb portion is positioned between the spacer rope and the first bulb portion. The second bulb portion may be receivable within the groove.

Abstract: A protective gasket for a display module of a portable electronic device and a method for assembling the device. The electronic device includes a housing frame, a main body having a display module, and a flexible gasket between the frame and main body, the frame having a display window corresponding to the display module. A cut is at corner portions of the gasket so that inner edges of the flexible gasket are bent after the display module is embedded into the display window, and then compressed and fitted between the outer periphery of the display module and the inner periphery of the display window. With the inner edges of the flexible gasket bent, the thickness of the electronic device can be reduced, and the periphery of the display module can be protected. The display module also can be protected from intrusion by foreign matters such as dust and moisture.

Abstract: A water leakage-proof apparatus aims to be firmly held between a shaft and a fixed surface to maintain water leakage-proof effect of the fixed surface and the surrounding of the shaft to prevent external water from flowing along the shaft into chinks around the shaft to form water leakage. The water leakage-proof apparatus includes a casing which has an orifice and an opening at one side. The water leakage-proof apparatus is coupled on the shaft through the orifice so that the opening covers the fixed surface. The water leakage-proof apparatus holds waterproof powder inside to achieve water leakage-proof effect.

Abstract: Gas turbine engine seals and engines incorporating such seals are provided. In this regard, a representative seal includes: an annular seal body having an inner diameter and an outer diameter, the seal body extending along an axis of symmetry between a first end and a second end; the seal body being formed of a strip of material having first and second opposing edges, the strip of material being deformed to exhibit a first sealing surface at the first end, a second sealing surface at the second end, and a third sealing surface along the inner diameter, the first edge being located adjacent to the third sealing surface, the second edge being located adjacent to the second sealing surface; the first edge being spaced from the second edge to define an annular opening, the annular opening providing access to an annular cavity of the seal body.

Abstract: An annular sealing element to seal between metal surfaces for use in flanges, joints, packers and the like, located in oil and gas exploration and production equipment. The sealing element has inner and outer metal deformable surfaces joined at ends, defining an interior volume which is entirely filled with a plastic deformable material. The surfaces are arranged such that on compression of the element from the ends, the element will deform in a controlled manner on a cantilever principle. The volume of filler and the interior volume remain substantially equal during compression so that delamination does not occur. Thus the sealing element provides a seal combining the flexibility of elastomer seals with the integrity of a metal to metal seal.