Abstract: A bearing system having a bearing pair made up of at least one bearing and at least one running partner, wherein a coating which is made up of a layer of which the main constituent is amorphous SiO2 is applied to at least one running surface of the bearing pair.

Abstract: A bearing system has first and second bearings each having an inner race. The inner races are mounted to a shaft. The first bearing inner race has a plurality of first ports. The second bearing inner race has a plurality of second ports. The shaft is insertable into the inner races in a plurality of orientations and has a plurality of outer diameter (OD) channels positioned to cooperate with at least the first bearing inner race to communicate with at least some of the first ports and at least some of the second ports. Regardless of said installed orientation, at least one of the second ports are in communication with at least one said inlet port along a flowpath bypassing all the first ports.

Abstract: Electrostatic stabilizers are provided for passive bearing systems composed of annular magnets having a net positive stiffness against radial displacements and that have a negative stiffness for vertical displacements, resulting in a vertical instability. Further embodiments are shown of a radial electrostatic stabilizer geometry (using circuitry similar to that employed in the vertical stabilizer). This version is suitable for stabilizing radial (lateral) displacements of a rotor that is levitated by annular permanent magnets that are stable against vertical displacements but are unstable against radial displacements.

Abstract: The invention relates to a bearing (10) including an inner ring (12), an outer ring (11), and rolling bodies positioned between the inner and outer rings, one of the rings being rotary and the other not, the bearing further including: a first module (20) including at least one set of sensor(s) suitable for performing successive measurements of at least one parameter representative of the vibrations within the bearing; and a second module (20) suitable for determining a frequency representation of the signal corresponding to the successive measurements, and for obtaining a set of elements(s) representative of the frequency representation based on that frequency representation, so as to compare at least one representative element of the set with a corresponding reference element and identify a malfunction based on that comparison (10).

Abstract: A rolling bearing assembly with electrical discharge damage protection is provided. The rolling bearing assembly includes radially inner and outer bearing rings that each have a race. A roller assembly including a plurality of rolling elements that are supported to roll on the races is provided. A shield extends radially between the radially outer ring and the radially inner ring. The shield includes a body portion with one radial end that is fixed to one of the radially inner or outer rings, at least one electrically conductive seal on a surface of the body portion, and a plurality of filaments extending on an opposite radial end of the body portion from the fixed radial end that contacts the other of the radially inner or outer rings.

Abstract: A sheet-type flange for transmitting power is formed by a substrate and a multiple of flange sheets. The substrate has a central axle hole with a square key slot and a multiple of fixed holes distributed around the axle hole. The multiple of flange sheets are annular and have connection slots arranged on a periphery of the flange sheets, as well as the multiple of flange sheets are arranged on both sides of the substrate respectively. The substrate and the multiple of flange sheets are fixed together by rivets.

Abstract: In a fixed type constant velocity universal joint, track grooves of an outer joint member include first track groove portions positioned on an interior side and second track groove portions positioned on an opening side. The first track groove portions each have an arc-shaped ball raceway center line having a curvature center that is prevented from being offset in an axial direction of the outer joint member with respect to a joint center. Planes each including at least the ball raceway center line and the joint center are inclined with respect to a joint axial line with their inclination directions alternately opposite to each other in the first track groove portions that are adjacent to each other in a peripheral direction of the outer joint member.

Abstract: A wedge friction clutch with controllable clutch locking function, having an axis of rotation, an inner race, an outer race located radially outward of the inner race, and, a wedge assembly including a wedge plate located between the inner and outer races in a radial direction, a first piston arranged to displace the wedge plate in a first circumferential direction, a second piston arranged to displace the wedge plate in a second circumferential direction, opposite the first circumferential direction, and, a hydraulic circuit arranged to control the first and second pistons.

Abstract: The present invention relates to a clutch actuated by torque capable of controlling a clutch device to perform operations of coupling or disengaging with the driving torque, characterized in that a relay transmission structure assembly (104) is installed between a rotary prime motive end (101) and an output-end clutch structure (1052), the relay transmission structure assembly (104) is installed with a relay coupling structure (204) having an active side of relay coupling structure and a passive side of relay coupling structure, a limit-torque sliding damping device (106) is installed between the relay transmission structure assembly (104) and the static housing (107).

Abstract: A center-pull hydraulic brake caliper structure for a bicycle is disclosed. The movable tube is rotated by the outer convex ring and then one end of the movable tube distant from the outer convex ring is distant from or against the first flange to adjust the position of the flowing openings and to make the pressure of oil and air not influence the use of brake.

Abstract: Calliper body (4) for disk brake having two elongated elements (5 and 6) on opposite sides of the disk and suitable for supporting and pressing pads (13 and 14) against the disk (2), each of said ‘elongated bodies (5 and 6) comprising an exit portion (97) of thrust means suitable for facing one of said pads (13, 14), each of said exit portions (97) having a boundary (96) delimited on the opposite side to the rotation axis (9) by an upper boundary (98) which borders a radially outer portion (21, 22) of the elongated body, said calliper body (4) having at least one connection bridge (3) with an inner bridge side (30, 31) facing towards the calliper body, said radially outer portion being divisible, along its direct tangential extension parallel to the circumferential direction, into three substantially equal sections (23, 24, 25 or 26, 27, 28), of which two lateral sections (23 and 25 or 26 and 28) and one interposed central section (24, 27), wherein said calliper body (4) comprises at least one reinforcement e

Abstract: A brake system of a drum brake includes a carrier unit and a brake cylinder, wherein a connecting element is provided, which has a first connection section for fixing the brake cylinder and is fixed in a second connection section to the carrier unit wherein, the first connection section is arranged offset to the second connection section while being parallel relative to the wheel axis, and wherein the first connection section can be fixed directly to the brake cylinder in order to keep the distance between the center of gravity of the brake cylinder and the first connection section low.

Abstract: Discs for disc brakes arranged around a rotational axis, comprising: a braking band and a drum, said drum comprising an edge arranged radially outside a portion for connecting the drum to a hub, said drum further comprising a drum body connecting said edge to the braking band and being suitable to create an interspace between the drum and the hub accommodated therein, said edge delimiting at least one opening with communicates the interspace present between the drum body and the hub with the external of the drum, said opening being arranged radially outside said housing for the hub, and said openings delimited by walls having at least one section inclined with respect to the axial direction are provided.

Abstract: A parking brake apparatus may include: a housing; a gear unit installed in the housing, and rotated by operation of a motor unit; a nut screw part connected to the gear unit, and rotated by the rotation of the gear unit; a bolt screw coupled the nut screw part so as to pass through the nut screw part, and moved in a longitudinal direction inside the nut screw part in connection with the rotation of the nut screw part; a cable connected to the bolt screw; a piston unit installed to be slidably moved in the housing, and having one side through which the cable passes and the other side which is extended toward the nut screw part; and an elastic member arranged between an inner wall of the housing and the piston unit, and elastically deformed as the piston is slidably moved.

Abstract: The non-asbestos frictional material composition containing a binder, an organic filler, an inorganic filler, and a fiber base material includes: copper in a content of 5 mass % or less as a copper element; a metal fiber other than a copper fiber and a copper alloy fiber in a content of 0.5 mass % or less; iron powder and tin powder as the inorganic filler in a total content of 1-12 mass %. The non-asbestos frictional material composition can provide a frictional material with excellent friction coefficient, anti-crack properties, and abrasion resistance even with the reduced content of copper and a copper fiber that possibly cause environmental pollution. The frictional material and the friction member are formed by using the above-mentioned non-asbestos frictional material composition.

Abstract: A non-asbestos frictional material composition is provided, which is capable of provide a frictional material with excellent shear strength, anti-crack properties, and abrasion resistance, even with the reduced content of copper. Furthermore, a frictional material and a friction member formed by using this non-asbestos frictional material composition are provided. The non-asbestos frictional material composition containing a binder, an organic filler, an inorganic filler, and a fiber base material includes: copper in a content of 0.5 mass % or less as a copper element; a metal other than copper and copper alloy in a content of 0.5 mass % or less; an acrylic elastomer-dispersed phenol resin as the binder in a content of 7-15 mass %; and Ca(OH)2 and/or CaO as the inorganic filler in a content of 1-5 mass %.

Abstract: A component vibration control system is disclosed. The vibration control system includes a first physical end stop, a second physical end stop, a damper assembly, a position sensor configured to determine a component position, and a processor in communication with the position sensor and the damper assembly. The processor is configured to set a first virtual end stop position, regulate a damping force of the damper assembly as the component moves toward the first virtual end stop position, and determine a second virtual end stop position based on a first distance of the component from a set position.

Abstract: A dome connector for a flywheel rim to shaft attachment is provided. The dome connector includes a helically wound composite band that extends from a first port to a second port. The helically wound composite band has a helical angle in relation to a line perpendicular to a center of axis of the dome connector. The helical angle is selected to at least in part achieve a desired stiffness in the dome connector.

Abstract: A power transmission belt has an uneven surface of rubber which when the power transmission belt is wound around a flat pulley, comes in contact with the flat pulley. The uneven surface has projected parts each having a flat top surface.

Abstract: A continuously variable transmission belt includes rings each superimposing annular component pieces on each other's inner and outer peripheries, and plural elements attached to the rings side by side in a circumferential direction. Each element includes a neck portion. The rings are disposed on opposite sides of the neck portion. The elements contact a driving pulley and a driven pulley. A lubrication oil discharge mechanism discharges out a lubrication oil in at least one of a gap between the component pieces, and a gap between each ring and the elements. A function of discharging the lubrication oil present in a region remote from the neck portion is higher than a function of discharging the lubrication oil present in a region near the neck portion. Thereby, the rings to which the elements are attached or the component pieces of the rings restrain decline in the centering characteristic in the width direction.

Abstract: Three links within one width-direction unit are included in respectively different link units. The links in the first row and the sixth row from the right end and the left end of a chain are included in the same link unit. The links in the second row and the fifth row are included in the same link unit. The links in the ninth row and the tenth row are included in the same link unit other than the link unit in which the links in the second row and the fifth row are included. With the above structure, the stress amplitude of the links forming a chain for a chain-type continuously variable transmission can be reduced.

Abstract: This invention relates to an energy chain (100; 200 . . . 700) having a number of mutually articulated chain links (212; 312 . . . 812), at least some chain links present a housing (216; 316 . . . 816) for the feed-through of cables and hoses. Adjacent chain links are pivotable against each there by way of hinged connections in such a manner that between a fixed connector (105) and movable connector (107) of said energy chain a movable deflection zone (104) with a predetermined curvature is formed. The invention provides that a bendable tubular envelope (110; 210 . . . 810), in particular a corrugated hose or corrugated tube, surrounds the chain links in the circumferential direction and between said two connectors (105, 107) in a continuous manner. The envelope is supported and entrained by at least some chain links (212; 312 . . . 812) and is sufficiently flexible for absorbing the predetermined curvature of the deflection zone (104) and for following the reciprocating movement thereof.

Abstract: Chain links and methods for forming chain links are provided. A method may include inserting a pin into a pin hole defined in a boss insert, and introducing the boss insert to a mold cavity defined in a mold plate of a mold assembly. The method further includes flowing chain link substrate to the mold cavity, and cooling the chain link substrate such that a chain link is formed. The chain link includes a base portion, a platform extending from the base portion, and a rib assembly extending from the platform and including a plurality of ribs and defining a central pocket. The boss insert is disposed in the pocket, and the pin is disposed in the pin hole of the boss insert.

Abstract: An electromechanical device comprises a mechanical interface structure (101) for connecting to an external rotating element, for example a wind turbine. The device comprises an electrical machine (102-104), and one or more gear stages (105-112) on a power transmission path between the mechanical interface structure and a rotor of the electrical machine. The device further comprises mechanical structures (113-115) constituting a common lubricant oil room for both the gear stages and the electrical machine. The electromechanical device comprises oil channels (116a) for directing lubricant oil circulated in the device to flow via the gear stages and via bearings (118, 119) of the electrical machine. Therefore, a common lubricating system can be used for both the gear stages and the electrical machine.

Abstract: A family of transmission gearing arrangements provides ten forward speed ratios and one reverse speed ratios by selective engagement of shift elements in various combinations. Four simple planetary gear sets are provided, each having a sun gear, a planet carrier, and a ring gear. One carrier is coupled to the input. At least one planetary gear set provides an underdrive speed relationship between a shaft extending from the carriers of that gear set and the output. At least two brakes and four clutches provide selective coupling between other shafts in the transmission.

Abstract: The multi-speed transmission in planetary design, in particular an automatic transmission for a motor vehicle, comprises an input shaft, an output shaft, four planetary gear sets, which are arranged in a housing, a total of eight rotatable shafts, and six shifting elements, comprising brakes and couplings, whose selective intervening brings about different transmission ratio relationships between the input shaft and the output shaft, such that at least eleven forward gears and one reverse gear are able to be realized.

Abstract: A planetary gear train of an automatic transmission for a vehicle may include an input shaft into which power of an engine is input, a first planetary gear set including a first sun gear, a first planetary carrier, and a first ring gear, a second planetary gear set including a second sun gear, a second planetary carrier, and a second ring gear, a third planetary gear set including a third sun gear, a third planetary carrier, and a third ring gear, a fourth planetary gear set including a fourth sun gear, a fourth planetary carrier, and a fourth ring gear, a first rotational shaft, a second rotational shaft, a third rotational shaft, a fourth rotational shaft, a fifth rotational shaft, a sixth rotational shaft, a seventh rotational shaft, and an eighth rotational shaft.

Abstract: The invention provides a continuously variable transmission (CVT) system comprising a transmission means, connected to an input shaft and comprising at least a driving gear capable of rotating around its center, said center capable of rotating around a center of a virtual trajectory; a gear ring, engaged with said driving gear, capable of eccentrically rotating around said center of said virtual trajectory; a blocking means, engaged with said gear ring, comprising a set of blocking elements adopted to block the rotation of said gear ring and which elements are suitable to move; and an output shaft, connected with said driving gear. The invention further provides the use of such a CVT system in large vehicles and windmills.

Abstract: In the one aspect, a tensioner that incorporates a fluid actuated cylinder and that is capable of precognitively anticipating when is desirable to increase the tension in a belt or other endless drive element so as to prevent belt slip prior to events that would raise the risk of it.

Abstract: An idler pulley (1) of a traction mechanism drive, on which a traction mechanism (24), such as a belt or chain, is guided, and which idler pulley is adjustable via an adjusting eccentric (5) and can be fastened to a machine part (2) in conjunction with a fastening means (8). The adjusting eccentric (5) and the fastening means (8) together form a fixing device (17) with which at least one end position of the adjusting eccentric (5) and consequently of the idler pulley (1) can be defined. For this purpose, the fixing device (17) comprises at least one lug (15) which is oriented radially or axially and interacts with at least one stop (16) of the associated further component.

Abstract: A chain guide includes a guide base (21) disposed to face one side of a timing chain (5) that transmits torque, the chain guide having an opposed pair of side plates (22) each formed with a plurality of shaft engaging portions (25) arranged along a circular arc. Roller shafts (31) have their ends supported by the respective shaft engaging portions (25). Rollers (41) for guiding the chain are rotatably supported by the respective roller shafts (31). Noncylidrical surface engaging portions are formed on the ends of the roller shafts (31) and on closed ends of the shaft engaging portions (50) to rotationally fix the roller shafts (31), thereby preventing the roller shafts (31) from rotating under drag torque applied from the rollers (41).

Abstract: A tension roller or reel device for a torque transmission element. The device comprises at least one bearing having one inner race, one outer race and at least one row of rolling elements between the inner race and the outer race, a pulley on top of the outer race, and a retaining screw inserted into a central bore of the inner race. The bore of the inner race is provided with a circumferential cavity in which an elastic ring is fitted non-securely and integrally, the cavity having an axial length strictly greater than the axial dimension of the elastic ring.

Abstract: A system has a pump with a power input, a power source and a continuously variable transmission (CVT) coupled to the power source and to the power input of the pump. The CVT transmits power from the power source to the pump. The CVT comprises a plurality of planetary members in rolling contact with an inner race and an outer race. A radial distance between the planetary members and a drive-transmitting member corresponds to a transmission ratio of the CVT.

Abstract: A slider apparatus of the invention includes a ball screw, first and second support members which respectively support the two end portions of the ball screw, a slider which includes a driving means for rotating a ball nut threadably engaging with the ball screw while rotatably holding the ball nut, and is disposed to be movable in the axial direction of the ball screw, first and second intermediate support members which are disposed to sandwich the slider, and each of which includes a support hole through which the ball screw passes and is movable in the axial direction of the ball screw, and a connecting member which engages with the first and second intermediate support members, and allows free movement of the first and second intermediate support members within the range of the full length of the connecting member.

Abstract: A ball screw capable of sensing a preload is formed of a nut having an internal thread surrounding an imaginary central axis, a screw inserted into the nut and having an external thread surrounding the imaginary central axis, and a plurality of balls are mounted between the internal and external threads in a way that the balls roll therebetween. A mounting hole having a mounting surface therein is formed in the nut. The mounting surface corresponds to the internal thread in a way that it is substantially perpendicular to the imaginary central axis. A force sensor is mounted to the mounting surface. The force sensor can directly sense the preload in real time, so it is uneasily adversely affected by any environmental factor to have more accurate sensing result relatively.

Abstract: An actuator is composed of a frame having a guide rail thereon and a slider movable relative to the frame by means of a ball lead screw. Lubrication of the ball lead screw is carried out by a lubricating member installed in the slider. A first lubricating member has an applicator nose which comes into sliding contact with a helical groove around the ball lead screw and a second lubricating member makes close contact with the first lubricating member to supply lubricant to the first lubricating member. The first and second lubricating members fit together in a recess made at one end of the slider major body. Both the first and second lubricating members have C-shaped contour. The first and second lubricating members lying in close engagement with each other are received in a recess in the end of the slider major body and held there with a presser plate which is secured using fastening screws.

Abstract: In a ball screw (1), comprising a screw shaft (3), a nut (7) threaded onto the screw shaft via a plurality of balls (9) received in a raceway (8) defined between the two parts, an end deflector receiving recess (6) is formed on each axial end thereof to complementarily receive an end deflector (21) which defines a part of the raceway in cooperation with an opposing part of the nut, wherein the end deflector is provided with a pair of engagement claws (31, 32) that engage corresponding parts of the thread (4) formed on the nut. Thereby, the need for a special engagement feature or other arrangement for attachment is eliminated, and still a highly firm and accurate engagement is ensured between the nut and the end deflector.

Abstract: The present invention is directed to a shaft with two front sides and an axis of rotation, whereby the shaft comprises at least one gear with the same axis of rotation, which gear borders at least a first one of the front sides in an axial area. Viewed from radially inside toward radially outside, the gear comprises a connection part with a central receptacle for the shaft, and an outer part with teeth. The connection part is cast directly between the shaft and the outer part. The connection part extends over the shaft in axial direction and covers the first front side.

Abstract: Embodiments of the present invention provide improved overrunning pulleys that overcome one or more of the deficiencies in the prior art as discussed herein. Embodiments of the present invention provide pulleys that are “springy” in the torque direction, yet have a lower effective spring constant (e.g., are less stiff) over a greater angular range. Further, in at least some embodiments, the inventive pulleys use a low cost and simple torque transfer geometry. Further, in at least some embodiments, the inventive pulleys afford significant overrun. Further, in at least some embodiments, the inventive pulleys are radially small in an overall envelope, for example, in order to allow an alternator to reach its highest possible rotational speed, and thus output, during engine idle. Further, in at least some embodiments, the inventive pulleys are more durable, as they offer the aforementioned dynamics in both directions (torque and counter-torque).

Abstract: An exemplary method of lubricating a turbomachine interface includes, among other things, securing a carrier relative to a torque frame using a flexure pin, and lubricating an interface of the flexure pin using a lubricant that has moved through a lubricant passage in the carrier and a lubricant passage in the flexure pin.

Abstract: A transmission includes a transmission mechanism. The transmission mechanism includes a planetary gear mechanism and a fixing element. A ring gear is provided with a first gear meshing with an output gear on an output member and a second gear meshing with a plurality of pinion gears. The output gear and the first gear include helical gears meshing with each other. The second gear and the plurality of pinion gears include helical gears meshing with each other. Helix angles of the output gear and the first gear and helix angles of the second gear and the plurality of pinion gears are set so that a thrust force generated in a case where the output gear and the first gear rotate and a thrust force generated in a case where the second gear and the plurality of pinion gears rotate are directed towards each other.

Abstract: A switching device has a substrate having a fixed contact portion, a slider, a first moving member having an inclined portion and a first engagement portion and being reciprocable on a first imaginary axis line, a first biasing member, a second moving member having a contact portion and a second engagement portion and being reciprocable on a second imaginary axis line, and a second biasing member biasing the second moving member, in which the first and second moving members are supported to be reciprocable in a state of bringing the inclined portion and the contact portion into sliding contact with each other, the slider comes into contact with and is separated from the fixed contact portion according to the reciprocation of the first moving member, and the first and second moving members are connected by the first engagement portion and the second engagement portion so as to be reciprocable.

Abstract: A hydraulic pressure supply system of an automatic transmission for a vehicle which generates a low hydraulic pressure and a high hydraulic pressure using oil stored in an oil pan and supplies the low hydraulic pressure and the high hydraulic pressure respectively to a low pressure portion and a high pressure portion may include a low-pressure hydraulic pump, a first switch valve, a low-pressure regulator valve, a high-pressure hydraulic pump, a second switch valve and a high-pressure regulator valve.

Abstract: A vehicle includes a motor, a resolver which detects a rotation angle of the motor, an automatic transmission which shifts rotation of the motor and transmits the shifted rotation to a drive shaft, and an ECU which performs learning control for correcting an error of the resolver and shift control of the automatic transmission. The ECU controls the automatic transmission such that, when the learning control is performed, a gear ratio becomes higher at a prescribed vehicle speed, than that when the learning control is not performed. By controlling the automatic transmission as described above, even when the vehicle is traveling at a low speed, a rotation speed of the motor easily reaches a rotation speed at and above which the learning control of the resolver can be performed. Accordingly, an opportunity to perform the learning control of the resolver can be obtained early.

Abstract: A modular assembly is described for a power train. An assembly housing includes first and second cavities connected by an inter-cavity passage. An input shaft and an output shaft linked by a first clutch are disposed, at least in part, in the first cavity. A hydraulic control assembly provides hydraulic control signals to control, at least in part, the first clutch device. A hydraulic quill insert disposed, at least in part, in the inter-cavity passage, includes a plurality of control passages. The hydraulic quill insert receives the hydraulic control signals and directs the signals to control power flow from the input shaft to the output shaft.

Abstract: A gear shifting device includes a shifting element that is axially shiftable into a shift position through the interaction of a shift pin with an associated groove-like shift gate that changes course in an axial direction. The shift element features, on an inner or outer diameter the shift gate, while the respective shift pin is arranged in a radially displaceable manner opposite the shift gate on a transmission component adjacent to the shift element.

Abstract: While a vehicle is decelerating starting at a braking start time, start-off pre-shifting starts when speed falls to a predetermined speed. At a vehicle stoppage time, an idle stop permission flag is not set to on if start-off pre-shifting is incomplete, even if idle stop permission conditions have been met. The idle stop permission flag is set to on when start-off pre-shifting is completed, and an idle stop flag is set to on and the engine stopped when engine rotational speed falls below a set speed. The engine is restarted in response to braking being released, and the idle stop flag is set to off and the idle stop control ended when the engine rotational speed reaches or exceeds a set speed. The restarting of the engine causes an engine-driven oil pump to dispense oil to be used as a medium to manifest an automatic clutch command hydraulic pressure.

Abstract: A cylinder assembly may include a cylinder end having a cylinder end opening, a cylinder barrel, a piston, a rod, and a shaft. An opening through the piston forms a sleeve passing through a portion of the piston. The rod extends out of the cylinder barrel and is configured to rotate with respect to the cylinder barrel and the cylinder end. An opening in the rod further forms the sleeve passing through an interior portion of the rod. A protruding end of the shaft passes through the cylinder end opening. A portion of the shaft has a cross-sectional shape corresponding to the cross-section of the sleeve. The protruding end of the shaft is free to rotate within the cylinder end opening in response to a rotation of the rod. The shaft is free to slide within the sleeve in response to an extension or retraction of the rod.

Abstract: Provided is a piston ring such that it is possible to sufficiently inhibit adhesive wear when the piston ring is mounted to a piston for a diesel engine in which at least the piston ring groove in the piston is formed from steel or cast iron. Disclosed is a piston ring mounted to a piston for a diesel engine, wherein the load length ratio (Rmr2) (in accordance with JIS B0601:2001) of the top surface and bottom surface of the piston ring satisfies each of the following conditions: Rmr2 (0.5%, 0.3[mu]m)=20% and Rmr2 (0.5%, 0.4[mu]m)=40%.

Abstract: A gasket includes: a spiral wound gasket; a first O-ring member located inner side of the spiral wound gasket; a second O-ring member located outer side of the spiral wound gasket; a first core spring located inside the first O-ring member; a second core spring located inside the second O-ring member; a first jacket formed with an opening portion and accommodating the spiral wound gasket, the first O-ring member, and the second O-ring member inside thereof through the opening portion; a second jacket formed with an opening portion at the one end thereof and accommodating the spiral wound gasket, the first O-ring member, and the second O-ring member, and the first jacket inside thereof through the opening portion; a first sealing layer being formed on the first jacket; a second sealing layer to cover the first sealing layer; and a third sealing layer being formed on the second jacket.