197results about "Bellows" patented technology

An accumulator includes: an exterior body including a bottom, a shell and a port; and a bellows provided inside the exterior body and having an S-shape being capable of expansion and contraction. In a case where the bellows has expanded maximally in the accumulator, the bellows has expanded from a free state where no load other than gravitational force is being applied to the bellows.

A boot of extends along an axis X direction and has a cylindrical shape that is extendable and contractable in the axis X direction. The boot includes a bellows portion alternately having a bellows portion-side peak portion and a bellows portion-side valley portion along the axis X direction, and an extending portion connected adjacent to the bellows portion in the axis X direction and provided adjacent to one end and / or an other end of the boot in the axis X direction. The extending portion is formed so that an outer diameter of an end of the extending portion on a side opposite to a side connected to the bellows portion in the axis X direction is smaller than an inner diameter of the bellows portion-side valley portion of the bellows portion.

The present application relates to a hygienically designed sealing element, which may, for example, be designed as a bellows, and to a system for receiving the sealing element. A system according to the invention comprises: a sealing device (1) with a main body (1a) on which a thickening (1b, 1c) is provided, which is adapted to be inserted into a receiving device (4, 7), a base body (2, 5), and a clamping device (3, 6), wherein the clamping device (3, 6) is connectable to the base body (2, 5), and wherein a receiving device (4, 4a, 4b; 7, 7a, 7b) in the form of grooves (4a, 4b, 7a, 7b) is provided in the base body (2, 5) and / or the clamping device (3, 6), which is adapted to receive the thickening (1b, 1c) of the sealing device (1). The grooves (4a, 4b, 7a, 7b) form tapered edges with the corresponding outer edges.This creates a defined, gap-free transition between the sealing device and the base bodies that are intended to secure the sealing device. Furthermore, this prevents non-cleanable gaps at the transition between the sealing device and the base body or clamping device.

A laser machining head includes a scanner. The scanner includes a mirror unit with a scanner mirror. The mirror unit has a groove that runs in a circumferential direction. The scanner further includes a frame capable of being secured in the laser machining head. The mirror unit is movably mounted in the frame. The scanner further includes an annular elastic seal secured to the frame on an outer circumference of the seal and engages with the groove on an inner circumference of the seal.

A method for manufacturing a substantially cylindrical dust cover (6) covering an outer side of a damper (3) extending in a predetermined direction and including bellows portions (61) that are configured to expand and contract in an axial direction and a flange portion (63) that extends radially outward, wherein an inner wall surface (110) of a mold (100) used in blow molding has a recess (130) corresponding to the flange portion (63), and wherein the mold (100) has a variable mechanism that changes an axial dimension of the recess (130) between a primary molding distance and a final molding distance, the final molding distance corresponding to a thickness of the flange portion (63), and the primary molding distance being larger than the final molding distance, the method for manufacturing the dust cover (6) comprising: a placement step of placing a molten thermoplastic resin having a tubular shape inside the mold (100) in a state where an axial dimension of the recess (130) of the inner wall surface (110) is set to the primary molding distance; a primary molding step of blowing air into the thermoplastic resin placed inside the mold (100) in the placement step to deform the thermoplastic resin along the inner wall surface (110) of the mold (100); and a secondary molding step of compressing, in the axial direction, a portion of the thermoplastic resin that is molded in the primary molding step and enters the recess (130) by changing the axial dimension of the recess (130) of the inner wall surface (110) to the final molding distance.

To provide an inexpensive sealing member for a rolling bearing and a rolling bearing that can suppress pressure changes inside the rolling bearing and prevent grease leakage from inside the rolling bearing and the intrusion of foreign matter from outside the rolling bearing. [Solution] The sealing member for a rolling bearing has an annular core and an elastic sealing material fixed to the core, the core includes an annular portion and has at least one hole that penetrates the annular portion from one axial side to the other axial side. The elastic sealing material has a closing portion provided to close the hole, and the closing portion has at least one axially projecting peak and / or valley.

The present invention relates to a link seal for an endless track truck and a manufacturing method thereof. When manufacturing the link seal, a shape restoring portion for partially or entirely doubling the restoring force is integrally formed with the body of the link seal, thereby eliminating the need to further fit in a separate ring-shaped shape restoring member. This eliminates the need for assembly of the link seal itself, and the structure is simple. In addition, there is no slack in the ring-shaped shape restoring member, so the restoring force of the link seal can be maintained for a long period of time. This provides a link seal for an endless track truck and a manufacturing method thereof that can significantly reduce the manufacturing costs of the link seal.

A circumferential seal assembly (30) for use between a higher pressure side (36) and a lower pressure side (37) is presented. The seal assembly (30) includes a primary sealing ring (31), a second sealing ring (32), a third sealing ring (33), and an insert (34). The primary sealing ring (30) sealingly engages both a face sealing surface (46) along a housing (35) and a radial sealing surface (45) along a rotatable element (52). The primary sealing ring (31), the second sealing ring (32), and the third sealing ring (33) cooperate, in combination with the housing (34), the rotatable element (52), and / or the insert (32), both to define and to separate a first cavity (53) at the higher pressure side (36) and a second cavity (54) at the lower pressure side (37). In some embodiments, the second sealing ring (32) sealingly engages a face (106) of the primary sealing ring (31). In other embodiments, the second sealing ring (32) sealingly engages a circumferential surface of the primary sealing ring (31).

The disclosure provides a steering dust seal which seals a gap between a shaft hole of a column hole provided in a dashboard and a steering shaft. The steering dust seal includes an annular mounting portion attached to an inner peripheral surface of the shaft hole, an annular bumper facing the steering shaft in a non-contact state, a bellows connecting the mounting portion and the bumper, and a seal lip extending from the bumper to contact with the steering shaft. A lip included in the seal lip is covered over its entire circumference with a resin-made sliding portion having a friction coefficient preventing abnormal noise from occurring due to a stick-slip phenomenon between the rotating steering shaft and the sliding portion.

To provide a rubber composition providing a rubber crosslinked body with a reduced amount of a solvent extract.SOLUTION: There is provided a rubber composition which comprises: a component A: an ethylene-propylene-diene rubber; and a component B: a polyolefin compound having a melting point of 70 to 100°C and containing one or more unsaturated bonds in the molecule.SELECTED DRAWING: None

The invention relates to a universal joint (1) comprising two articulation forks (10, 20), each extending along a respective elongation direction (O1, O2), and each comprising two facing plates (12, 22). The forks are articulated to each other at their facings by a cross joint (30) comprising a first journal (31) and a second journal (32) arranged in the form of a cross perpendicular to each other. The two free ends of each journal are engaged in two corresponding oblong holes (12A, 22A) arranged opposite each other on the two facing plates of a respective fork and oriented parallel to the elongation direction of that fork. The universal joint further comprises an elastically deformable bellows (40) filled with a lubricant and in which are enclosed in a sealed manner the said cross member and the cheeks of the said articulation forks.Figure to be published with the abbreviation: Fig. 2.

The invention relates to a curable fluoroelastomer composition having low swelling tendency, comprising: A) a curable fluoroelastomer; B) a curing system; and C) 0.1 wt.-% to 30 wt.-% of a nitrogen-containing polymer, selected from polyimide, polyimide, mixtures and / or copolymers thereof, each relative to the total weight of fluoroelastomer and nitrogen-containing polymer, the nitrogen-containing polymer being present in particulate form of an average particle size in the range of 0.15 to 70 μm and / or in fiber form having an average fiber diameter in the range of 0.15 to 70 μm.

A disc brake, comprising a brake caliper (1) in which two brake pads (2) are arranged which can be pressed against a brake disc in operation, one of which, on the action side, can be actuated by means of a clamping device (3) via at least one axially adjustable adjusting spindle (4) carrying a pressure piece (5), and the adjusting spindle (4) is guided through an opening in a cover (7) that closes a receiving chamber of the brake caliper (1), forming an annular gap, wherein a sealing arrangement (12) is provided in the area of ​​the opening to seal the receiving chamber, which bears against the pressure piece (5) on one side and is held on the other side on the inside of an axially oriented collar (8) that circumferentially delimits the opening, wherein the sealing arrangement (12) has a bellows (10) and a concentrically arranged secondary seal (11), and the secondary seal (11) and the bellows (10) are formed in one piece, is designed such thatthat the secondary seal (11), which has a central opening and is more dimensionally stable than the bellows, has a circumferential shell which is attached to the inside of the collar (8) by friction or material interlock, wherein the bottom of the secondary seal (11), which is angled towards the shell, bears against the adjusting spindle (4) with its edge, which is formed as a bead (15) and defines the central opening, and the bellows (10) is connected to the pressure piece (5) by form-fitting, material interlock, or friction interlock with its end, which is formed as a thickening and is radially opposite to the shell.

Cuff unit, comprising: a cuff (250) having a small diameter portion (400) formed on one side, a large diameter portion (410) formed on the other side, and a pleated portion (210) formed between the small diameter portion (400) and the large diameter portion (410); a bushing (220) formed integrally with an inner circumference or an outer circumference in a circumferential direction and having a predetermined thickness; and a band (230) formed in the bushing (220) along the circumferential direction of the bushing (220) and having a substantially annular shape, wherein the bushing (220) is molded on the large diameter portion (410) of the sleeve (250), and wherein the band (230) is formed by an overmolding process on the inside of the bushing (220), wherein the band (230) has a band eyelet (240) protruding from an outer periphery of the band (230), wherein a groove portion (280) is formed in the sleeve (250) and the bushing (220) such that the strap eyelet (240) is exposed out of the sleeve (250) through the groove portion (280), and wherein the bushing (220) is formed along an inner circumference of the large diameter portion (410) of the sleeve (250).

The present disclosure relates to a bellows seal arrangement having a bellows designed with a controlled shift in effective mean diameter when the bellows is exposed to a pre-determined pressure.

The invention relates to a steering link assembly, a seal integrity diagnostic system and a test method. A steering link assembly includes a steering link operably connected to a pair of wheels. The steering link assembly also includes a housing defining a sealed compartment that accommodates at least a portion of the steering link. The steering link assembly also includes a first seal cover operatively coupled to the steering link and positioned proximate the first end of the housing. The steering link assembly also includes a second seal cover operatively coupled to the steering link and positioned proximate a second end of the housing, where the first seal cover has at least one distinctive characteristic relative to the second seal cover to define a different seal cover.

The present invention relates to a rotary-wing aircraft having a fuselage that forms an interior region of the aircraft, the fuselage including an upper main skin that separates the interior region of the aircraft from an upper cabin of the aircraft disposed above the fuselage, wherein the upper cabin of the aircraft includes an engine accommodation region having a firewall structure (10), the engine accommodation region accommodating at least one aircraft engine (11) within the firewall structure (10), wherein the firewall structure (100) includes at least one gasket (10g) for sealing a passage of a torque tube (15) that connects at least one aircraft engine (11) to a main gearbox (17) of the rotary-wing aircraft, and wherein the at least one gasket (10g) includes at least two fireproof casings (12b) and an annular flexible fireproof bellows (13).

A modular vessel assembly defining an internal chamber suitable to maintain a vacuum within the chamber to support a magnetically confined plasma. The present modular assembly is formed from a plurality of annular modular sections arranged in abutting contact as a stack of annular rings extending around a central axis of the chamber. A sealing arrangement is provided at the interface between the modules of the stack to create a fluid seal configured to maintain at least a partial vacuum within the chamber. The present modular vessel assembly is suitable for use as a confinement vessel within a fusion reactor such as a tokamak.

A boot assembly for a vehicle brake comprises: a flexible boot having an end portion coupled to a housing accommodating at least some components of the vehicle brake including a rotatable body configured to be rotatable by an actuator to move a brake pad and a bearing configured to rotatably support the rotatable body and comprising a non-rotatable bearing race, wherein the boot supports the non-rotatable bearing race; and a boot retainer configured to hold the boot in a fixed position with respect to the housing. Another end portion of the boot is coupled to a linearly movable body configured to be translatable according to rotation of the rotatable body of the vehicle brake to seal an inner bore of the housing. The boot is coupled with one side of the non-rotatable bearing race to limit an axial movement of the non-rotatable bearing race away from the housing.

The invention relates to a hybrid bellows for a height adjustment device of a vehicle, the hybrid bellows (1) comprising a multi-layer base body (2) having a first free end (3) and a second free end (4) and a working chamber (5) which can be formed between the free ends (3, 4), the base body (2) having an inner elastomer layer (6) facing the working chamber (5) and an outer elastomer layer (8) facing the environment (7), the inner elastomer layer (6) has a first material composition and the outer elastomer layer (8) has a second material composition. The hybrid bellows is characterized in that the first material composition and the second material composition differ from each other. The invention also relates to a height adjustment device for a vehicle, comprising such a hybrid bellows (1).

An augmented assembly skin-constrained expandable bellows system includes a top end cap, a bottom end cap, and a bellows attached to and separating the top and bottom end caps, and configured to retain pressurized fluid between the top and bottom end caps. The system also includes nozzles configured to allow fluid to enter and exit the bellows, and a non-extendable skin attached to each of the top and bottom end caps and to the bellows. When the bellows expands via the nozzles, the top end cap is in a first position, and when the top end cap is adjusted from the first position to a second position, the skin is configured to hold the top end cap in the second position and constrain the bellows into a predetermined rigid three-dimensional shape.

A covering system and method for a pitch link of a helicopter include a boot having a bellows, and a cap removably secured to the boot. The boot and the cap are configured to cover at least a portion of the pitch link. The cap is removable from the boot to provide access to the pitch link.

A sealing device (1) includes an elastic body portion (2) that is annular and is formed with an elastic body. The elastic body portion (2) has a seal lip (10) which is annular. The seal lip (10) contacts a guide member (102) inserted into the seal lip (10). An interference (α) of the seal lip (10) with respect to the guide member (102) inserted into the seal lip (10) has such a size that insertion of the guide member (102) into the seal lip (10) becomes easy. The seal lip (10) is a tubular portion extending along an axis line (x).

One embodiment of the present invention pertains to a sealing structure for a lifting shaft of an industrial robot, with respect to a rotation driving unit for moving forklifts up and down in an industrial robot, the robot comprising: a first driving module disposed in a vacuum space and in charge of moving the forklifts in a straight line; and a second driving module disposed in an atmospheric space and in charge of rotating and vertically moving the first driving module, wherein the second driving module may comprise a housing forming the exterior thereof, a lifting body disposed in the housing to be able to ascend and including a lifting shaft having therein a rotation shaft for rotating the first driving module, and a bellows surrounding the lifting shaft from the outside to seal the outer surface thereof.

A flexible boot for a constant velocity universal joint includes: attachment portions to a mating member at both ends; and a bent portion provided between the attachment portions and absorbing deformation caused by operation of a constant velocity universal joint. The flexible boot is made of a rubber material obtained by blending 50 to 80 parts by weight of HNBR having an acrylonitrile content of 15 to 21 wt% and 20 to 50 parts by weight of EPDM, the rubber material having an elastic recovery rate of 18% or more at -40 °C in a TR test.

Provided is a flat bellows having dust resistance, heat resistance, chemical resistance, durability, and flexibility without going through a complicated manufacturing process with a small number of parts. 【Solution means】The flat bellows 1 of a thin metal plate of the present invention is a flat bellows 1 of a thin metal plate that is continuous in a corrugated shape and includes a mountain-folded mountain-folded portion 11, a valley-folded valley-folded portion 12, and an inclined portion 13 that connects the mountain-folded portion 11 and the valley-folded portion 12. The mountain-folded portion 11 has a first mountain-folded side surface 11a and a second mountain-folded side surface 11b that are connected by an arc-shaped top portion 11c. The valley-folded portion 12 has a first valley-folded side surface 12a and a second valley-folded side surface 12b that are connected by an arc-shaped bottom portion 12c. The mountain-folded portion 11 and the inclined portion 13 are connected at an obtuse angle, and the inclined portion 13 and the valley-folded portion 12 are connected at an obtuse angle.

An electric actuator includes a forwardly and reversely rotatable electric motor, a motion conversion mechanism configured to convert a rotation of the electric motor into a reciprocating linear motion of a screw shaft, an actuator case containing the electric motor and the motion conversion mechanism, and a boot covering a portion of the screw shaft that extends out of the actuator case. A vent is formed on the actuator case. The vent is configured to ventilate a sealingly closed space in the actuator case and the boot. A breathable waterproof member is provided on the vent and a cover member is also provided on the vent. The breathable waterproof member is configured to block entry and exit of water while permitting entry and exit of air. The cover member is configured to cover the vent so as to allow ventilation with outer air. Due to this configuration, the electric actuator can inhibit a change in the inner pressure in the actuator to thus achieve the improvement of the durability of the boot with a simple structure without causing an increase in the number of components and the complication of the structure and leading to a cost increase accompanying them.

To provide a propeller shaft equipped with a protective boot that can select both an air vent function and a waterproof function.SOLUTION: An annular groove recessed in a radial direction is formed on an inner peripheral surface of a protective boot where a boot fastening part comes into contact with a stub shaft, and an external communication groove communicating from the annular groove to an outside of the protective boot and an internal communication groove communicating from the annular groove to an inside of the protective boot are further formed on the inner peripheral surface, and when used as the protective boot with an air vent function, the stub shaft with a flat outer peripheral surface is fitted into the boot fastening part of the protective boot so that the internal communication groove, the annular groove, and an external communication passage are connected, and when used as the protective boot with a waterproof function, the stub shaft with an annular protrusion formed on an outer peripheral surface so as to match the annular groove is fitted into the boot fastening part of the protective boot so that the annular groove closes the annular protrusion.SELECTED DRAWING: Figure 2

Estimate the temperature of the drive shaft boot. [Solution] A drive shaft boot temperature estimation device for use in an automobile equipped with a grill shutter that is attached to the grill in front of the radiator and can be opened and closed, and a drive shaft boot, the device estimates the temperature of the drive shaft boot based on a trained model obtained by machine learning, which takes as input variables a first parameter that reflects the temperature around the drive shaft boot, a second parameter that reflects the temperature of a heat source close to the drive shaft boot, and a third parameter that has at least one of the vehicle speed and the open / closed state of the grill shutter, and as an output variable the temperature of the drive shaft boot, and the first, second, and third parameters.