Abstract: The present disclosure relates to a vehicle door coupling device, and more specifically, to a vehicle door coupling device for mechanically coupling together a first member having a first hole and a second member having a second hole at a position corresponding to the first hole.

Abstract: A joint has a housing with journal openings, an inner joint portion with a bearing area, which is fitted into the housing and extends axially out of the housing through the openings. A bearing body is arranged in and firmly connected to the housing which encloses the bearing body and comprises plastic. The inner joint portion is fitted and able to move within the body. Sealing bellows surround the inner joint portion and extend from a bearing-body-side bellows contact area, provided on the body or the housing, to an inner-joint-portion-side bellows contact area, provided on the inner joint portion. A sleeve is provided, on at least one of the bellows contact areas, that surrounds the inner joint portion and extends axially. The sleeve surrounds the bellows or is surrounded by the bellows, and has, at an axial end, a radial limb against which the bellows is axially supported.

Abstract: A sewer manhole cover includes a frame having an access aperture and a cover for covering the access aperture. A primary seal is generated when the cover is placed on the frame either by way of contact between the frame and cover or by way of a gasket received within a groove formed into one of the frame or cover, wherein the gasket is compressed between the frame and cover. A method is provided for generating a secondary seal between the frame and cover by applying an amount of a viscous compound to a circumferential surface of the frame or cover, wherein the secondary seal is formed when the cover compresses the compound when the cover is received within the frame.

Abstract: A bearing support for a turbocharger, the bearing support including a body, a bore extending axially through the body and dimensioned to receive a bearing and a portion of a planet carrier, and a plurality of pilots. Each pilot may be formed on an external surface of the body, and each pilot may be machined for an interference fit with a different component of the turbocharger.

Abstract: Reduce bearing loss due to lubricating oil using a rotary shaft; a journal bearing that is provided to the rotary shaft and that rotatably supports the rotary shaft; a flange part having an opposing surface part that is arranged so as to oppose a side surface part of the journal bearing with a gap therebetween in the axial direction in which the rotary shaft extends; and a recess part provided in the side surface part or the opposing surface part. In the projected area of the journal bearing in the axial direction, the area of a section including the recess part and not forming the gap is larger than the area in which the side surface part and the opposing surface part form the gap.

Abstract: The assembly includes a housing with an inner bore that extends along an axis. A stud is at least partially disposed in the inner bore of the housing and is pivotable relative to the housing. A top edge of the housing is bent radially inwardly to present a flange. A two-piece dust boot is provided including a cover piece of an elastic material and a spring washer. The cover piece extends from a first end portion that is sealed against the housing to a second end portion that is sealed against the stud. The spring washer is at least substantially encapsulated within the cover piece at the first end portion and biases the cover piece against the flange of the housing to establish a seal that is resistant to compression setting between the cover piece and the housing.

Abstract: A sliding component, which can seal and lubricate at the same time by reducing the amount of leakage of sealed fluid further while preventing torque increase and local wear, is characterized in that an extremely shallow step of circular shape is provided on a sealing face of one of a pair of sliding parts that slide against each other in such a way that the step is positioned on the low-pressure fluid side (atmosphere side) of this sealing face and also set lower than the sealing face, and that pumping grooves acting to push back toward the high-pressure fluid side (sealed fluid side) the fluid that tends to leak from the sealing face toward the low-pressure fluid side (atmosphere side) are provided on the surface of the extremely shallow step.

Abstract: A reaming tool for use in reaming a bore includes a body adapted for location in a bore. The body defines a rotor of a rotary drive arrangement. A shaft adapted for location is disposed in the body. The shaft defines a stator of the rotary drive arrangement. A seal element is disposed between the shaft and the body. The seal element defines a bearing surface for permitting sealed relative rotation of the rotary drive arrangement. The tool includes a reaming member, wherein relative rotation between the body and the shaft facilitates reaming of the bore by the reaming member.

Abstract: The present application relates to an apparatus for preparing a food stuff. The apparatus has a main body (2) with a rotating shaft (4) and a container (3) in which a food stuff is placed which has a tubular member (8) upstanding in the container with an opening (9) at a free end. The shaft is receivable in the tubular member and forms a fluid seal with the shaft.

Abstract: This bush is made out of a composite material that has a modulus of elasticity of between 500 and 6000 N/mm2, said bush having at least one lip formed directly at the time of manufacture as an overrun edge of its bore to act as a leak-tight or protective barrier after mounting on the shaft by creating a tightening effect between the inside diameter of said lip or said lips, and the outside diameter of said shaft.

Abstract: In order to effect a seal; a porous material which comprises one side of two opposing surfaces is used to restrict and evenly distribute externally pressurized gas, liquid, steam, etc. between the two surfaces, exerting a force which is opposite the forces from pressure differences or springs trying to close the two faces together and so may create a non contact seal that is more stable and reliable than hydrodynamic seals currently in use.

Abstract: A seal assembly is disclosed for use between a housing and a rotatable shaft protruding exteriorly from the housing, with the shat being journalled for rotation in an eccentric cartridge which in turn is rotatably adjustable. The seal assembly comprises a circular flinger mounted on the shaft for rotation therewith. The flinger has radially outwardly projecting flanges defining an axial space therebetween. A seal carrier surrounds the flinger and has axially spaced first and second inner rims projecting radially inwardly into the space between the flanges of the flinger. Ring seals are carried by the seal carriers. The inner rims are resiliently urged to maintain the ring seals in contact with the flinger flanges.

Abstract: The invention relates to a thrust washer (28) for an electric machine (10, 12) intended to be arranged on a shaft (16) between a bearing (18) and a rotor (14), preferably a rotating electrical contact element (24) impacted by brushes (38), and/or a lamination stack (36) of the rotor (14). The thrust washer (28) is provided with an area for sealing having two end faces (32, 34). Each end face (32, 34) has at least one abutment section (50, 52) for the bearing (18) or the rotor (14). A cavity (54) that is circumferential in at least some sections is arranged between the abutment sections (50, 52) of the two end faces (32, 34).

Abstract: A bearing arrangement (4) is provided with a bearing inner bush (10) and an outer bush (5), especially for the central joint (1) of a Watt's linkage. The bearing arrangement (4) is provided with a sealing arrangement (12) surrounding the front-side bearing gap between the inner bush (10) and the outer bush (5). The sealing arrangement (12) comprises an elastic sealing element (14) with static as well as dynamic sealing surfaces. The bearing arrangement (4) has a sealing arrangement (12) designed as a sealing module (12), which can be connected to the bearing inner bush (10), the sealing module (12) also comprising a running surface (15) for the axial bearing of the outer bush (5). The arrangement makes possible the especially economical production of modularly designed, highly loadable bush bearings. Furthermore, undivided, continuous bearing bushes can be used, which improves the ability to be mounted and the precision and the service life of the bearing arrangement.

Abstract: A viscous seal for fluid transfer devices that deviates from the conventional wisdom of avoiding contact between the seal and a rotating drive shaft of the fluid transfer device. Instead of avoiding contact, contact between the seal and drive shaft is used to effect axial alignment of a sealing sleeve with the shaft. As a result, the viscous seal is compliant in that the sealing sleeve can follow the axis of the drive shaft. Accordingly, the sealing sleeve can fit snugly around the drive shaft for more effective prevention of leakage of low or any viscosity fluid along the drive shaft, but without any significant radial load being applied to the sealing sleeve that might cause undue wear or damage due to galling.

Abstract: There is provided a shaft member such as a bearing, washers, and shaft, having at least one surface defining a plurality of radial grooves for providing radial fluid communication without generating significant thrust loading between the shaft member and an adjacent surface. The grooves can be formed by pressing a die against the surface(s) of the shaft member.

Abstract: A rubber laminated bearing-seal, consisting of multiple flat or curved alternate laminations of metal and rubber bonded together and having an aperture, is seated in an apertured receptacle in the wall of a pressure vessel and supports a shaft that penetrates the apertures, extending from one side of the wall through to the other side. Shear strains in the rubber laminations permit the shaft to carry limited movements through the wall while the laminations seal against any flow of the liquid or gaseous medium on one side toward the other side and withstand the resulting thrust caused by large pressure differences. The torque reaction of this bearing-seal is essentially proportional to rotation angle. A potential use is in the intense hydrostatic pressure environment of undersea applications at great depths, carrying limited motion through the hull of a submersible craft.

Abstract: A blood processing system comprises a processing chamber to process blood and a fluid flow cassette that communicates with the processing chamber. The cassette comprises a body, a pump chamber formed in the body, and a flexible diaphragm on the pump chamber responsive to an applied fluid pressures for flexure toward and away from the pump chamber to pump fluid through the pump chamber. The cassette also includes a flow path formed, at least in part, in the body to couple the pump chamber in fluid flow communication with the processing chamber, to convey fluid pumped by the pump chamber into the processing chamber. The cassette also includes an in line cavity formed in the body and located in the flow path to trap air to prevent entry of air into the processing chamber.

Abstract: A rubber laminated bearing-seal, consisting of multiple flat or curved alternate laminations of metal and rubber bonded together and having an aperture, is seated in an apertured receptacle in the wall of a pressure vessel and supports a shaft that penetrates the apertures, extending from one side of the wall through to the other side. Shear strains in the rubber laminations permit the shaft to carry limited movements through the wall while the laminations seal against any flow of the liquid or gaseous medium on one side toward the other side and withstand the resulting thrust caused by large pressure differences. The torque reaction of this bearing-seal is essentially proportional to rotation angle. A potential use is in the intense hydrostatic pressure environment of undersea applications at great depths, carrying limited motion through the hull of a submersible craft.

Abstract: The wiper bearing (10) includes a bearing shaft (11), which is received in a bearing housing (12) and is connected to a bearing element (15) and a wiper arm (17) in such a way that a torque can be transmitted from the bearing element (15) to the wiper arm (17). The bearing shaft (11) has an axial stop means (18) with a stop face (20). It is provided that the stop face (20) is operatively connected to a contact face (19) of the bearing housing (12), and the contact face (19) and/or the stop face (20) is surface-structured.

Abstract: A rubber laminated bearing-seal, consisting of multiple flat or curved alternate laminations of metal and rubber bonded together and having an aperture, is seated in an apertured receptacle in the wall of a pressure vessel and supports a shaft that penetrates the apertures, extending from one side of the wall through to the other side. Shear strains in the rubber laminations permit the shaft to carry limited movements through the wall while the laminations seal against any flow of the liquid or gaseous medium on one side toward the other side and withstand the resulting thrust caused by large pressure differences. The torque reaction of this bearing-seal is essentially proportional to rotation angle. A potential use is in the intense hydrostatic pressure environment of undersea applications at great depths, carrying limited motion through the hull of a submersible craft.

Abstract: A gas dynamic machine, such as a turbocharger, compressor or turbine, includes a housing and a rotor mounted in the housing and rotatable on an axis. A bearing and seal member or assembly includes a bearing mounted in an axial bore of the housing and having an inner bearing surface radially supporting a bearing journal of the rotor An axial oil seal is aligned with and fixed to the bearing for radially positioning the seal in axial alignment with the journal bearing surface of the bearing/seal assembly. The seal may further include a generally radial flange fixed to the housing for axially positioning the bearing/seal assembly relative to the rotor. The bearing and seal may have separate bodies attached together or be combined in an integral body. Mounting with a single radial pilot for radial location and a single radial flange for axial location, which may be combined, is featured. An optional thrust flange may be integral with the bearing portion or attached as a separate body.

Abstract: A tracked vehicle produces a pressure no more than 3 psi on the ground by increasing the number of contact points on the inner surface of the track. The stiffness of the track is also selected to minimize bowing between the idler wheels or rollers. The track is therefore kept substantially straight between the rollers to increase the efficiency associated with transferring power to track. The drive sprocket is positioned above the ground so as to eliminate complexity in the design and yet effectively transmit power to the tracks. Positioning the drive sprocket above ground also prevents derailing of the track. The track is also held in a constant state of tension on the driver sprocket and the roller. This too prevents derailment. The undercarriage of the vehicle includes torsion axles and sealed bearings to provide for a lower maintenance track. Components associated with the undercarriage do not require constant greasing and cleaning of the idler wheels.

Abstract: A radial-flow exhaust-gas turbocharger turbine is provided with a row of adjustable guide blades which are rotatable via adjusting shafts mounted in a casing. The guide blades are each provided with sealing discs on their longitudinal sides running at right angles to the adjusting-shaft axes. The diameter of the sealing discs is a multiple of the thickness of the guide blades. The sealing discs which are located on the side remote from the adjusting shafts form bearing points for the guide blades in the casing.

Abstract: A unitary radial lip seal assembly to provide a fluid tight seal between a shaft and a housing bore through which the shaft extends includes an annular rigid retainer, a resilient body portion secured to the retainer and defining at least one sealing lip to seal against the rotatable shaft and a sleeve bearing member supported by said seal assembly outboard of the sealing lip. In one form the bearing member is rigidly connected to the retainer, in another, it is resiliently mounted to provide shaft vibration dampening. In the latter embodiment, the bearing member includes a radial wall urged into frictional engagement with a radial wall of the resilient body to restrict rotation of the bearing member.

Abstract: In order to cool the slide bearing area for the slidable bearing of a gear pump shaft, a slide bearing bush with a slide bearing area and, in the case of the guiding-through of a shaft, a sealing area extends in one piece integrally to the outside, and a cooling-medium guiding system provided in the bush is connected from the outside. This eliminates all sealing problems for the cooling medium feeding to the slide bearing area.

Abstract: First and second construction elements, such as claws of a timber grab, are mounted for relative rotational movement with respect to each other by an axis joint. The axis joint includes a bearing bushing an a bearing shaft. The bearing shaft has inner conical surfaces which cooperate with outer conical surfaces of conical washers which are held in place by a screw and nut. Under the influence of the screw and nut the components of the axis joint are held together so that there is a butt connection. The bearing bushing contains a slide bearing surface with internal resilient sealing lips, and annular openings are provided so that the sealing lips can expand freely upon insertion of the bearing shaft into the sleeve and resiliently abut the bearing shaft. When inoperative the sealing lips have an inner diameter less than the outer diameter of the bearing shaft by about 0.1-1.0 mm.

Abstract: In order to ensure full-surface thrust contact and coverage despite a low production and assembly outlay, even if the bearing is mounted slightly askew, a thrust and cover washer may be used which includes an inelastic first annular washer part axially thrusting and not contacting the rotor shaft, and an elastic second annular washer part positively joined thereto and resting sealingly on the rotor shaft. The first annular washer part may advantageously be made of plastic and the second annular washer part may advantageously be made of an elastomer.

Abstract: A rotary shaft is supported by a bearing surface of a bush body. The diameter of the rotary shaft is slightly smaller than that of the bearing surface of the bush body, thus defining a clearance therebetween. On both end sides of the bush body, seal portions elastically engage with the peripheral surface of the rotary shaft, and the outer surfaces of the seal portions extend within a range of thickness of the bush body so that end surfaces of the bush body and end surfaces of the seal portions are in contact with each other. Consequently, both sides of the clearance are sealed by inside surfaces of the seal portions.

Abstract: A system for fixating a shaft in its bearing casing as well as in a wiper installation the shaft is fixated in its bearing in that the annular gap between the shaft and the bearing is filled by the injection of a plastic material rendering optimum sealing and load bearing qualities.

Abstract: A track roller or cam follower type bearing has seal-thrust withstanding members. The sealing function and the thrust withstanding function are performed by a single structure.

Abstract: The present invention is a damper seal which is used in sealing a tube, such as a fuel nozzle, into a housing, such as a fuel canister. The damper seal provides increased sealing capabilities as the pressure inside the housing increases and further dampens vibrations which may occur between the housing and the tube. The damper seal includes a damper portion having outer and inner longitudinally extending scallops to define outer and inner contact surfaces for the damper seal. The inner and outer scallops are circumferentially offset from each other to enhance the vibration dampening characteristics of the damper seal. In addition, inner and outer seals having a U-channel located therebetween are provided for sealing against a tube and a housing, respectively, wherein the U-channel facilitates a positive biasing of the inner and outer seals into engagement with cooperating surfaces in the presence of a fluid pressure.

Abstract: A rod guide assembly for rotary applications has a stationary housing and a rotating housing. The stationary housing has an exterior, an interior, a first end and a second end. A primary stationary annular bushing is positioned in the interior at the first end of the stationary housing. The primary bushing has an interior bore. A bearing is provided having an outer race, and an inner race with an inner circumference. The outer race of the bearing is non-rotatably fixed to the stationary housing. A secondary annular rod guide is positioned in the interior at the second end of the stationary housing. Annular packing is disposed within the interior of the stationary housing to provide a fluid seal. The cylindrical rotating housing has an exterior, an interior, a first end and a second end. The exterior has a neck portion adjacent the second end. The neck is adapted to engage the inner circumference of the inner race of the bearing disposed at the first end of the stationary housing.

Abstract: A rotary mechanical face seal for preventing leakage of a fluid, either liquid or gas, across two relatively rotating surfaces. The seal is of the non-contacting mechanical type in which a predetermined spacing is maintained between the relatively rotatable sealing washers by formation of a pressurized fluid film between the relatively rotating surfaces. The opposed faces are constructed to provide a separation of the faces at startup and thereby prevent damage or destruction to the faces before design pressures are achieved. This is achieved by providing at least one of the opposed faces with a deflection bearing portion which causes the necessary deflections under load. The bearing portion comprises a spaced series of lift pad sections. A variety of lift pad constructions can be used. The seal also includes a hydrodynamic radial bearing which centers the shaft in the static state to avoid shaft runout.

Abstract: A dynamic pressure bearing with a magnetic fluid sealed therein is reduced in size without degrading the bearing performance and includes a sleeve 5 having an insertion hole 6 axially formed therein fixed in a housing 1, and a pair of pole pieces 9a, 9b disposed with clearances defined between the opposed surfaces of the sleeve 5 and the housing 1. A shaft 7 is inserted in and fixed to the pole pieces 9a, 9b, and is disposed in the insertion hole 6 with a clearance defined therebetween, and a magnetic fluid 15 is sealed in these clearances, thus forming a dynamic pressure bearing assembly. The sleeve 5 is made of nonmagnetic material while the housing 1, shaft 7 and pole pieces 9a, 9b are made of magnetic material. A permanent magnet 2 is interposed therebetween to form magnetic fields in the clearances between the housing 1 and the pole pieces 9a, 9b, thus sealing the magnetic fluid 15 therein.

Abstract: A rotary mechanical face seal for preventing leakage of a fluid, either liquid or gas, across two relatively rotating surfaces. The seal is of the non-contacting mechanical type in which a predetermined spacing is maintained between the relatively rotatable sealing washers by formation of a pressurized fluid film between the relatively rotating surfaces. The opposed faces are constructed to provide a separation of the faces at start-up and thereby prevent damage or destruction to the faces before design pressures are achieved. This is achieved by providing at least one of the opposed faces with a deflection bearing portion which causes the necessary deflections under load. The bearing portion comprises a spaced series of lift pad sections. A variety of lift pad constructions can be used. The seal also includes a hydrodynamic radial bearing which centers the shaft in the static state to avoid shaft runout.

Abstract: A brake shaft of a vehicle is rotatably supported in a housing by a pair of bush assemblies acting as plain bearings. Each bush assembly is composed of a cylindrical body with grooves in its inner periphery which open to one end of the body. The housing has a bore for introducing lubricant into the grooves. A flange at the opposite end of each body has a recess in which a multi-lip seal is fitted. The housing has recesses which receive the flanges, of the bodies and deformable lips on the bodies locate in the recesses and assist the seals to prevent the ingress of contaminants.

Abstract: An exhaust gas recirculation valve assembly for controlling the recirculation of exhaust gas in an internal combustion engine having a base with an exhaust gas chamber formed therein, a valve assembly having a valve member mounted within the exhaust gas chamber for metering the flow of exhaust gas therethrough, and a valve stem extending out of the chamber through an opening therein, a one piece bearing having upper, intermediate, and lower bearing members for precise positioning of the valve member within the exhaust gas chamber, and a valve stem support assembly for mounting the valve stem relative to an actuator. The intermediate and upper bearing portions operate to deflect exhaust gas, escaping from the exhaust gas chamber and traveling along the valve stem of the valve member, from impinging on the actuator.

Abstract: A pivot pin bearing/seal especially adapted for supporting the rotor of a disposable filtration cartridge of a continuous-flow plasmapheresis blood separation system includes a lubricious plastic pivot pin injection molded with a recess at its end. The recess is surrounded by a sharp circular inside edge. A stainless steel eyelet, deep drawn from successive dies, is loosely inserted into the pin recess, a radial outer surface defined at the junction between the eyelet shank and the eyelet flange contacting the pin sharp edge. The eyelet rotates relative to the pin, the circular line path of rotational contact being defined by the smooth curved surface under the flange of the eyelet and the sharp inside edge surrounding the pin recess which quickly burnishes to a good rotational seal.

Abstract: A bushing for rotatably supporting a bar-shaped suspension link comprises an elastomeric body having a central axis and including an axial bore adapted to receive the suspension link therethrough. The bore includes a circumferential surface having projected surface portions and recessed surface portions, the projected surface portions projecting radially inwardly to provide radial clearance between the suspension link and the recessed surface portions. Preferably, the projected surface portions include a plurality of first and second ridges projecting radially inwardly. The first ridges are substantially parallel to the central axis of the elastomeric body and intersect the second ridges at substantially right angles to define therebetween the recessed surface portions. The preferred embodiment of the bushing of this invention further comprises a double-knit fabric liner covering the circumferential surface of the bore of the body.

Abstract: A centrifugal pump has a floating casing ring which is deflectable in response to contact by an impeller of the pump.

Abstract: An elastomeric mount for a thrust bearing shoe comprising a piston fluidly operative in a platform cavity, the piston isolated and sealed from the cavity by an elongated elastomeric bearing-seal. The piston lockingly engages a thrust shoe with a compound dovetail connection whereby the shoe may be installed and removed after the piston and elastomeric bearing-seal are bonded into the platform cavity.

Abstract: A roller chain having a thrust ring between a roller and a link plate for sustaining the transverse load, in which a thrust ring is made of bearing materials and has a sealing part in order to be put into the hole part formed on the end face of the roller to reserve the lubricant.The sealing part prevent the lubricant from effluxing and prevent the dust from intruding into the inside of the roller.

Abstract: A sealed bearing assembly for a rotating shaft includes a bearing member having an integral lip which engages the shaft to form a first seal. The bearing member also has an integral collar defining a recess into which is press-fitted a separate annular member adapted to engage the shaft so as to form a second seal closely adjacent the first seal. The two seals may have different sealing characteristics. The bearing member, the lip seal, and the collar are formed integrally as a one-piece element and can be manufactured simply and cheaply from a plastics material by injection molding.

Abstract: A one-piece, self-lubricating, thermoplastic bearing and sealing member suitable for supporting a moveable shaft and forming a seal around the circumference thereof. The bearing and sealing member comprises a tubular shaped body, an inner annular wall portion of which may be radially cut to form a recess and one or more flanges of preselected length and thickness. Alternately the sealing and bearing member may be molded with the flange and recess formed in situ. The flanges may have an inner diameter which is smaller than the outer diameter of the shaft or may have an outer diameter which is larger than the outer diameter of the bearing and sealing member. The flanges can be bent, preferably in the vicinity of their respective bases to a preselected angle below 20.degree. relative to a transverse axis of the sealing member.

Abstract: A bearing seal assembly (10) provides a seal and a low-friction bearing between a shaft (18) and a housing (20); and includes a relatively flexible annular seal (12) circumscribing the shaft (18), a low friction race (14) circumscribing and nonrotatably mounted to the seal (12) and a low friction case (16) rotatably housing the seal (12) and the race (14). The bearing seal assembly can be used to seal the annular area between an automotive steering column and an automotive body.

Abstract: Accelerated wear of the seal in a thrust bearing and seal assembly is avoided by the provision of a bearing having a thrust bearing pad engaging a shoulder on a shaft with the inner diameter of the bearing being spaced from the shaft sufficiently to define a seal receiving space. An axially movable seal having a sealing surface engaging the shoulder is located in the space and is biased against the shoulder by a biasing spring. When deflection occurs, the sealing element is free to yield axially, allowing the loading to be taken up by the thrust pad.

Abstract: An electric motor having a bearing and a commutator with brushes on one end of the rotor shaft, and a dust seal for the bearing formed by a sleeve forming part of and extending axially from the bearing into an annular recess in the commutator. The sleeve defines an open-ended conical space around the shaft, tapering to the bearing.

Abstract: Sealing ring for radial rolling bearings with an outer race and an inner race and rolling bodies in the gap between them, consisting of a ring body of elastic material bridging the gap with, at one radial end, at least one sealing lip or the like sliding along a contact surface of the outer race or inner race and with, at its opposite end, a hub section supported on a seating surface of the inner or outer race and a stiffening plate incorporated into the ring body with a radial web section and, in the hub section, a collar section connected to the outer edge of the web section facing the hub, characterized in that the collar section of the stiffening plate is formed both by axially inward-bent and axially outward-bent tabs of the outer edge of the stiffening plate.

Abstract: An improved bicycle headset is disclosed having ball bearing races sealed by O-rings against contamination by dust, dirt, moisture and the like. This bicycle headset includes a lower assembly comprising a lower cup fitted to the lower end of a head tube, a crown cone upon which the shoulder of a front fork bears, a lower ball bearing race positioned between the lower cup and the crown cone, and a lower O-ring seal mounted on the crown cone to isolate the lower ball bearing race from the external environment. Also included, is an upper headset assembly comprising an upper stationary cone fitted to the upper end of the head tube and an upper cup threadedly attached to the upper end of a fork tube. A weatherproof lock nut is tightened down against the top portion of said upper cup so as to lock the position of the upper cup on the fork tube about a handlebar stem, and seal the upper part thereof.