261results about "Bellows" patented technology

A metal bellows for downhole use includes: a bellows capsule with a first end and a second end; an inner diameter side and an outer diameter side arranged between the first end and the second end; where the bellows capsule comprises a first bellows convolution and second bellows convolution and optionally additional bellows convolutions; and each bellows convolution comprises: a root on the inner diameter side of the bellows capsule; a first sidewall extending from the root toward the outer diameter side of the bellows capsule with a first connection point at the distal end; a second sidewall extending from the root toward the outer diameter side of the bellows capsule with a second connection point at the distal end and wherein the second sidewall is on the opposite side of the root as the first sidewall; wherein: the bellows convolutions are formed as a single piece; and the second sidewall connection point of the first bellows convolution is permanently affixed to the first sidewall connection point of the second bellows convolution.

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.

Bellows (10) for the protection of parts of a transmission joint (40), wherein the bellows (10) is in the form of a hollow tubular body that is open at each of its ends and has a fastening region (21;22) at each of its open ends. The two fastening regions (21;22) have cross-sections with different outer diameters and run essentially in parallel to a longitudinal axis (X) of the bellows (10), and these end side fastening regions (21;22) are interconnected by a deformable wall (30) that runs transverse to the longitudinal axis (X) of the bellows (10), wherein the deformable wall (30) forms at least one fold (32) between the two fastening regions (21;22). Thereby, a first fastening region (21) with the larger outer diameter D is extended in the direction of a second fastening region (22) with the smaller outer diameter d by means of a circumferential extension section (50) with a circular free edge (51) and the deformable wall (30) is connected to this extension section (50) at a first connection line (60) which is located before the free edge (51) of the extension section (50). The outer surface of the extension section (50) is straight at least between the first connection line (60) and the free edge (51).

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.

A dust boot sealing system for automotive brake cylinders, is arranged for dust protection between a linear actuation member and a housing of the brake cylinder. The boot comprises flexible bellows between two concentrical interface portions, and the both interface portions rest radially outwards from their respective counterpart seats in circumferential grooves on housing and actuation member. The boot is provided with pressure relief valve and with integrated pressure relief valve function which automatically and temporarily changes into open status under a pressure gradient decline in direction from interior to exterior, with respect to the boot.

The present invention describes soft robotic actuators (300,400). Each robotic actuator (300,400) is made up of a corrugated sleeve (110,110a,210,210a), an expandable blabber (120,220) and a lock member (370,480). The corrugated sleeve (110,110a,210,210a) has a hollow passageway (111,211) with a plurality of folds (112,212) extending along the passageway, with the hollow passageway extending along a length of the corrugated sleeve. The expandable blabber (120,220) is detachably inserted inside the hollow passageway (111,211) and being kept inside the corrugated sleeve (110,110a,210,210a) by the lock member (370,480). In a use application, a fluid medium is communicable into the bladder under pressure through a tubing opening formed on the lock member (370,480) results in reversible inflation of the bladder (120,220). Inflation of the bladder causes the bladder to press against and deform the corrugated sleeve, thereby generating a force output and controlled extension / bending of the robotic actuators (300,400).

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.

The invention relates to a laser machining head (20) having a scanner unit, comprising: a mirror unit having a scanner mirror (242), the mirror unit having a channel (2432) running in the circumferential direction; a frame (241) which can be fixed in a machining head (20) of the laser machining system (10), the mirror unit being movably mounted in the frame (241); and an annular resilient sealing element (245) wherein the sealing element (245) is secured to the frame (241) on an outer periphery of the sealing element and is in engagement with the surrounding channel (2432) on an inner periphery of the sealing element. The invention further relates to a sealing element (245) for a scanner unit and to an additional laser machining head having a scanner assembly (24).

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.

The invention relates to a sealing element (10) for a heated high-pressure cleaning device (20) for sealing a detachable connection between an air guide part (78) and an air inlet nozzle (74), wherein the sealing element (10) extends about a central axis (96). In order to further develop the sealing element (10) in such a way as to enable simpler assembly of the high-pressure cleaning device (20), it is proposed that the sealing element (10) has a first end section (102) and a second end section (104) opposite it, wherein the first end section (102) has a collar (108) aligned coaxially to the central axis (96) which forms at least one sealing surface (118, 120) surrounding the central axis (96), and wherein the second end section (104) has a sealing lip (122) which, in the unloaded state, faces the central axis (96) and is oriented obliquely to the central axis (96).Furthermore, a heated high-pressure cleaning device (20) with such a sealing element (10) is proposed.

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.

To provide a gas burner that can keep sealability in a through hole through which a burner body penetrates a wind box, and allow deformation caused by a thermal elongation difference.SOLUTION: A gas burner 1 comprises a wind box 3, and a burner body 5 for supplying gas fuel to a furnace 7 of a boiler. The burner body 5 comprises: a tip part 10 extending in the direction of a first horizontal axis L1 toward the furnace 7, and fixed to the wind box 3; and a base end part 12 penetrating a through hole 22 provided in a rear wall part 3a of the wind box 3. The rear wall part 3a comprises: a detachable wall part 3a1 located in the direction of the first horizontal axis L1, and capable of being detached; and a fixed wall part 3a2 provided at a position separated from the first horizontal axis L1 with respect to the detachable wall part 3a1, and in which the through hole 22 is formed. The through hole 22 is provided with an elastic deformation part 30 for airtightly sealing the through hole 22, and allowing a relative movement of the base end part 12 with respect to the rear wall part 3a.SELECTED DRAWING: Figure 1

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.