143results about "Bellows" patented technology

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 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.

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.

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.

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.

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.

To suppress generation of buckling during compression of a bellows.SOLUTION: A bellows is a synthetic resin bellows, and comprises: a crest part that is convex in a radial direction; a trough part adjacent to the peak part in an axial length direction, and concave in the radial direction; and an intermediate part including a midpoint in the radial direction of the apex of the external surface of the crest part and the apex of the external surface of the trough part. A first length, which is a length in the axial length direction between the apex of the external surface of the peak part and the midpoint, is larger than a second length, which is a length in the axial length direction between the apex of the external surface of the trough part and the midpoint.SELECTED DRAWING: Figure 2

A sealing device includes a movable part which is fixed to a shaft penetrating a wall of a vessel and is movable with the shaft, the vessel being configured to include an interior space, a first bellows part which has a first end fixed to the vessel and a second end fixed to the movable part, for sealing a penetrated portion of the vessel by the shaft, a second bellows part which is disposed opposite to the first bellows part across the movable part, and has a first end disposed on a side of the first bellows part and fixed to the movable part, and a second end fixed to a stationary member, and a communication path for causing an interior space of the first bellows part and an interior space of the second bellows part to communicate with each other.

To provide an accumulator using an S-shaped bellows, which can reduce its weight while suppressing deterioration in durability.SOLUTION: An accumulator according to the present invention comprises an exterior body comprising a bottom, a shell, and a port, and a flexible S-shaped bellows provided inside the exterior body. When the bellows maximally expands in the accumulator, the bellows expands relative to a free state in which no load other than gravity is applied.SELECTED DRAWING: Figure 1

The invention relates to a bellows (10) comprising a first connecting area (1), a second connecting area (2), and a bellows body (3) designed as a hollow body and extending in the direction of a longitudinal axis (L), which radially encloses a bellows interior (I), wherein the bellows body (3) has several folds (4) arranged one behind the other in the direction of the longitudinal axis (L) and mutually connected to each other internally and externally, so that the two connecting areas (1, 2) can be moved relative to each other in the direction of the longitudinal axis (L) by an extension movement of the bellows body (3) into an extended position (A) or by a compression movement into a compressed position (K), wherein in the compressed position (K) the folds (4) each lie flat against an adjacent fold (4) on one side (4.1) and are spaced apart from an adjacent fold (4) on the opposite side (4.2).

In some implementations, the adjustable seal (102) includes a multi-layer strip (104) having a first end (110) and a second end (112). The first layer (106) of the multi-layer strip (104) comprises a non-sealing material. The second layer (108) of the multi-layer strip (104) comprises a sealing material. The first end (110) of the multi-layer strip (104) includes a locking mechanism (114) on a first layer (106) of the multi-layer strip (104). The second end (112) of the multi-layer strip (104) is configured to be inserted through an opening (116) of the locking mechanism (114) such that the multi-layer strip (104) forms a loop providing the seal (102). A first layer (106) of the multilayer strip (104) forms an outer layer of the loop and a second layer (108) of the multilayer strip (104) forms an inner layer of the loop.

The present invention relates to a laser processing head (20) having a scanner unit, the scanner unit comprising: a mirror unit having a scanner mirror (242) with a circumferentially extending groove (2432), a frame (241) fixable within the processing head (20) of a laser processing system (10), the mirror unit being movably mounted within the frame (241), and an annular resilient sealing element (245) fixed to the frame (241) on an outer periphery of the sealing element and engaging with the circumferential groove (2432) on an inner periphery of the sealing element. The present invention further relates to a sealing element (245) for the scanner unit and an additional laser processing head having a scanner assembly (24).

To provide a dust cover that is less likely to generate a gap between a seal part and a steering shaft.SOLUTION: A dust cover includes: a cylindrical bushing fitted to an outer peripheral surface of a steering shaft and extending along a circumferential direction about a central axis; and a bellows for blocking a gap between a cylindrical member and the bushing. The bellows includes a seal part projecting toward the outer peripheral surface of a steering shaft and including a tip that abuts on the outer peripheral surface. The bellows is softer than the bushing.SELECTED DRAWING: Figure 5