Wedging Pawl Or Block Patents (Class 192/45.1)
-
Patent number: 7406768Abstract: In a one-way clutch integrated with a rolling bearing, rolling elements and sprags are arranged in an annular space between an inner race and an outer race in each of which a one-way clutch raceway surface is formed in one axial side of a rolling bearing raceway surface. The rolling elements and the sprags make contact with respective raceway surfaces and are respectively housed in circumferentially spaced pockets formed in a common cage configured by mutually engaging and integrating two annular members in an axial direction. The one-way clutch includes urging means for urging the sprags in a locking direction in the pockets. An annular flat plate portion which seals one axial end portion of the annular space between the inner race and the outer race is integrally formed in one of the two annular members constituting the cage. Respective at least one radial and axial through holes are formed in the annular member.Type: GrantFiled: June 23, 2006Date of Patent: August 5, 2008Assignee: Jtekt CorporationInventors: Tetsuo Ikeda, Kazuo Iga, Kazushi Mizutani
-
Publication number: 20080179156Abstract: This invention presents a reverse input prevention clutch bearing assembly in which a forward and a reverse torque inputted from an input side is transmitted to a output side, while locks the transmission of the forward or the reverse torque inputted from the output side to the input side by locking the output side or by separating the output side from the input side. The reverse input prevention clutch bearing assembly has a first rotational member and a second rotational member which are arranged on a coaxial line and has orbit surfaces with different radii and a plurality of rolling members which are arranged in a circumferential shape between the two orbit surfaces so that the outer circumferential surfaces of the rolling members are contact-rotatable.Type: ApplicationFiled: April 7, 2006Publication date: July 31, 2008Inventor: Donghwan Byun
-
Publication number: 20080149448Abstract: A one-way clutch including first and second races with radially opposed circumferential surfaces and at least one wedge separate from the races and disposed radially between the races. The first race is arranged for rotational connection to a torque transmitting element in an automotive device and is arranged to rotate independently of the second race for relative rotation in a first direction. A circumference for one of the circumferential surfaces has a uniform radius. A circumference for the other of the circumferential surfaces includes at least one radial protrusion. The wedge elements are arranged to engage the protrusions and the opposing circumferential surface to rotationally lock the first and second races for relative rotation of the first race in a second rotational direction, opposite the first rotational direction. During lockup, a circumferential extent of the wedge elements in contact with the second race is greater than an axial extent.Type: ApplicationFiled: December 10, 2007Publication date: June 26, 2008Applicant: LuK Lamellen und Kupplungsbau Beteiligungs KGInventors: Jeffrey Hemphill, Michael Davis, William Brees
-
Publication number: 20080149447Abstract: A one-way clutch including a race disposed about an axis for the clutch and a wedge plate with a plurality of finger elements extending toward the race and in contact with the race. One of the plate or race is arranged for rotational connection to a torque transmitting element in an automotive device and is arranged to rotate independently of the other of the plate or race for rotation, with respect to the other of the plate or race, in a first rotational direction. The plurality of fingers are arranged to grip the race, to rotationally lock the plate and race, for relative rotation of the plate or race in a second rotational direction, opposite the first rotational direction.Type: ApplicationFiled: December 10, 2007Publication date: June 26, 2008Applicant: LuK Lamellen und Kupplungsbau Beteiligungs KGInventor: Michael Davis
-
Patent number: 7389864Abstract: A one-way clutch spring intended to reduce drag torque of one-way clutches. Tongues extend within pockets in which engagement members are disposed are bent in advance radially inward when they are disposed in an annular space so as to have bends at a proximal end and to form an angle of inclination (?) of 20°-30° with a base. Further, the angle of inclination (?) with the base increases to exceed the angle of inclination (?) by an amount of 5°-15° when engagement members contact the tongues. Further, the height of the front end of the tongue relative to the base is greater than that of a top of the second bend to the base, and the three bends each have their center of curvature positioned on the side of an inner ring with the base used as a reference and their radius of curvature is 0.2 mm-0.6 mm.Type: GrantFiled: January 9, 2004Date of Patent: June 24, 2008Assignee: JTEKT CorporationInventor: Yoshihisa Miura
-
Publication number: 20080128233Abstract: A selectable mode clutch includes a first race coupled for rotation with an input member, a second race, and a projection integrally formed with one of the first and second races. The clutch includes rollers that engage axial ridges on the first and second races to radially displace the second race relative to the first race upon relative rotation between the first race and the second race. The clutch also includes a control member having a first receiving portion and a second receiving portion. One of the control member and the projection is movable along the central axis relative to the other between a first position, in which the projection is positioned in the first receiving portion to operate the clutch in a first mode, and a second position, in which the projection is positioned in the second receiving portion to operate the clutch in a second mode.Type: ApplicationFiled: September 2, 2005Publication date: June 5, 2008Inventors: Mark A. Joki, Richard F. Murphy
-
Publication number: 20080093189Abstract: A device for damping rotary oscillations in a drive train with a freewheel clutch (27) located between a pulley (25) and a rotor hub (26) is provided. The hub (26) is connected to an input shaft of an auxiliary unit, and the pulley (25) is connected to a crankshaft via a traction means, and the freewheel clutch (27) has an inner ring (34), which surrounds the hub (26) while being fixed thereto, and includes an outer ring (35), which surrounds the inner ring (34) with radial play and which is fixed to the pulley (25). At least one locking element (36) that is actuated by centrifugal force is provided in the inner ring (34), and at least one locking receptacle (37) is provided in the outer ring (35).Type: ApplicationFiled: June 22, 2005Publication date: April 24, 2008Applicant: SCHAEFFLER KGInventors: Bernhard Wiesneth, Harald Hochmuth, Alexander Zernickel, Sigurd Wilhelm
-
Patent number: 7360634Abstract: A device for frictional inter-engagement between two mutually movable parts (13, 14). A lever mechanism exerts counter-directed pressing forces towards both parts to transfers movement between them. A lever (25) has a free lever end (27) contacted by a first (13) of the parts, and opposite to the free end a part-cylindrical convex surface (31) journalled in a part-cylindrical concave bearing surface (33). In order to eliminate the risk of jamming of the lever due to excessive surface pressure, it is journalled with rolling bodies, preferably cylindrical bodies (34).Type: GrantFiled: February 25, 2004Date of Patent: April 22, 2008Assignee: Gadloc ABInventors: Monica Gadelius, legal representative, Gustaf Gadelius
-
Patent number: 7353926Abstract: A one-way clutch integrated with a rolling bearing includes rolling elements and sprags which are arranged in an annular space between an inner race and an outer race. In each of the inner and outer races, a one-way clutch raceway surface is formed in one axial side of a rolling bearing raceway surface. The rolling elements and the sprags make contact with respective raceway surfaces and are respectively housed in circumferentially spaced pockets formed in a common cage configured by mutually engaging and integrating two annular members in an axial direction. An associated peripheral side of each of the sprags contacts a surface of either a shaft fitted to an inner peripheral face of the inner race or a housing to which an outer peripheral face of the outer race is fitted.Type: GrantFiled: June 23, 2006Date of Patent: April 8, 2008Assignee: JTEKT CorporationInventors: Tetsuo Ikeda, Kazuo Iga, Kazushi Mizutani
-
Publication number: 20070284209Abstract: A one-way bearing, provided with a passive element on its outer periphery and connected with an axle rod with its inner periphery, comprises a collar, a lid and a plurality of braking blocks. The collar has thereon a plurality of spaced notches, and the braking blocks are respectively rotatably received in the notches of the collar. The braking blocks are provided each with a braking portion; when the axle rod rotates in one direction, the axle rod is linked up with the passive element; when the axle rod rotates in a contrary direction, the braking portions have no function, so that the power of the axle rod and the passive element will be interrupted.Type: ApplicationFiled: June 7, 2006Publication date: December 13, 2007Inventor: I-Heng Chen
-
Patent number: 7267213Abstract: A one-way clutch is proposed which is low in surface pressures and durable. It includes an inner ring having a cylindrical outer surface, and an outer ring having a cylindrical inner surface defining a wedge-shaped space in cooperation with the cylindrical outer surface of the inner ring. A ring-shaped wedge member is disposed in the wedge-shaped space. The wedge member is formed with a cylindrical outer surface and a cylindrical inner surface having a center of curvature that is radially offset from the center of curvature of the cylindrical outer surface of the wedge member. A resilient member is provided between the inner ring and the wedge member to bias the wedge member in a direction to be wedged into the narrow portion of the wedge-shaped space. When the inner ring is rotated in one direction, the wedge member will be brought into wedging engagement with the cylindrical surfaces of the inner and outer rings. Torque is thus transferred from the inner ring to the outer ring.Type: GrantFiled: March 8, 2005Date of Patent: September 11, 2007Assignee: NTT CorporationInventors: Yoshihiro Demura, Makoto Yasui, Masao Komuro
-
Patent number: 7258215Abstract: Holes of a predetermined depth are formed in an outer peripheral surface of an outer ring. The outer ring is integrally connected to a housing by insert molding, so that a resin, forming the housing, is received in the holes. Alternatively, pins are fixedly inserted respectively in the holes, and are fitted respectively in grooves, notches or through holes formed in the housing. With this construction, a creep is positively prevented without the need for providing an interference fit between the housing and the outer ring.Type: GrantFiled: February 28, 2005Date of Patent: August 21, 2007Assignee: Koyo Seiko Co., Ltd.Inventor: Tetsuo Ikeda
-
Publication number: 20070175722Abstract: A clamping body freewheel (1) has clamping bodies (2) arranged between a cylindrical outer raceway (4) and a cylindrical inner raceway (3) which is concentric with respect to said cylindrical outer raceway (4), which clamping bodies (2) can be tilted between a freewheel position and a clamping position, and has a cage (6) which guides the clamping bodies (2). The clamping bodies (2) are shaped and guided in the cage (6) in such a manner that they are raised both from the inner raceway (3) and from the outer raceway (4) into the freewheel position when a minimum rotational speed of the cage (6) is exceeded.Type: ApplicationFiled: January 30, 2007Publication date: August 2, 2007Inventor: Frank Straub
-
Patent number: 7216748Abstract: The present invention is a drivetrain that prevents the torque from a decelerating engine from being transmitted to the wheels of the vehicle. The drivetrain of a vehicle is provided such that the negative torque from the decelerating engine of the vehicle is selectively prevented from being transmitted to the wheels of the vehicle.Type: GrantFiled: March 25, 2005Date of Patent: May 15, 2007Inventor: Jody G. Mayne
-
Patent number: 7175011Abstract: The invention relates to a free-wheel, in particular a pinch roller free-wheel or a pinch body free-wheel, comprising relatively-rotating elements arranged one within the other on a common axis, which form a gap, in which pinch elements, in particular pinch rollers or pinch bodies, are arranged such that a friction connection can be produced with the facing outer surfaces of the elements, by means of the pinch surfaces, whereby the free-wheel outer rim is covered by a ring of fibre-reinforced plastic and the external diameter of the ring of fibre-reinforced plastic is about 1.3 to 1.8 times the diameter of the external clamping surface.Type: GrantFiled: August 28, 2002Date of Patent: February 13, 2007Assignee: Paul Mueller GmbH & Co. KG UnternehmensbeteiligungenInventors: Eberhard Kōhler, Holger Frei, Eberhard Karl, Manfred Elbacher
-
Patent number: 7100755Abstract: A oneway clutch assembly comprises an outer race and an inner race, torque transmitting members disposed between the outer race and the inner race, a biasing spring for biasing the torque transmitting members, side plates disposed on the both sides of the torque transmitting members in the axial direction thereof, and detachment preventing means for restricting movements of the torque transmitting members, the biasing spring, and the side plates in the axial direction, and being elastically engaged with the outer race or the inner race. One of the side plates is provided with an engagement projection extended in the axial direction and the engagement projection is fitted in the detachment preventing means.Type: GrantFiled: September 24, 2004Date of Patent: September 5, 2006Assignee: NSK-Warner K.K.Inventor: Yasuhide Takasu
-
Patent number: 7055666Abstract: The present invention provides a one-way clutch comprising sprags disposed between outer and inner races which are rotated relative to each other and adapted to transmit torque, spring members for biasing the sprags toward an engagement direction, and a cage which has a plurality of window portions for holding the sprags and in which a column portion between the adjacent window portions is partially cut at a predetermined position to connect between the adjacent window portions and the column portion is bent to form an elastic piece elastically engaging with the outer race or the inner race, and wherein a recessed portion is provided in a side surface of a bent portion of the elastic piece in a bent direction.Type: GrantFiled: March 1, 2004Date of Patent: June 6, 2006Assignee: NSK-Warner K.K.Inventors: Seiji Nishimura, Hideki Oki, Tetsuya Wakamori
-
Patent number: 7017451Abstract: A locking structure of a unidirectional spanner comprises a spanner body having a receiving chamber and at least one directional control communicated with the receiving chamber; a toothless ratchet receiving in the receiving chamber; at least one directional control device receiving in the directional control groove; the directional control device being formed by a directional control unit and an elastomer; the directional control unit being locked with the toothless ratchet. If the spanner body moves, a reverse force will apply to the toothless ratchet; when the reverse force causes the directional control unit to move away from the elastomer, the toothless ratchet will be locked by the directional control unit so that the toothless ratchet rotate synchronously with the spanner body. When the reverse force cause that the directional control unit can compress the elastomer, the toothless ratchet will rotate independently, namely, not rotate synchronously with the spanner body.Type: GrantFiled: March 3, 2004Date of Patent: March 28, 2006Inventor: Chin-Ching Hsien
-
Patent number: 6997295Abstract: A freewheeling clutch includes torque transmitting elements disposed between an inner race and an outer race. The elements include active surfaces that may be defined by an angularly variable radius of curvature that varies with respect to roll angle at an increasing rate, such as an equiangular spiral, to form a constant strut angle as the elements move between a freewheeling and an engaged position.Type: GrantFiled: July 3, 2002Date of Patent: February 14, 2006Inventors: Jack E. Pederson, Duane A. Bacon, Alfred J. Chiesa
-
Patent number: 6953112Abstract: The present invention provides a one-way clutch in which spring force of tongue pieces of a spring will not be decreased, even in case where a larger tightening margin is provided between a cage and an outer race, but proper spring force can be maintained thereby to attain reliable synchronization between the outer race and the cage, and a rise of cost will not be incurred. The one-way clutch includes a cage, a spring arranged along an inner diameter side of the cage, and a sprag assembly. Each of sprag is inserted into pockets of the spring and cage, respectively. One end of the spring is overlapped with the other end at a position where the largest repulsive force is exerted from the cage. Thereby, rigidity of the spring is increased in a part of the spring corresponding to the position.Type: GrantFiled: July 31, 2003Date of Patent: October 11, 2005Assignee: Koyo Seiko Co., Ltd.Inventor: Yoshihisa Miura
-
Patent number: 6933641Abstract: The present invention provides a stator assembly in which axial side portions of the assembly are supported by needle bearings, wherein projections are formed on flange portions provided on races of the needle bearings and the projections are fitted into recesses formed in the side portions of the stator assembly.Type: GrantFiled: June 4, 2002Date of Patent: August 23, 2005Assignee: NSK-Warner K.K.Inventors: Kazuhiko Muramatsu, Yoshio Kinoshita
-
Patent number: 6932206Abstract: A one-way clutch having a plurality of sprags (3) arranged at an annular space between a driving side member and a driven side member along a circumferential direction thereof, two cages (4, 5) on an outer side and an inner side for retaining the sprags, and a spring member (6) in an annular shape, in which the outer side cage (4), the inner side cage (5) and the spring member are respectively formed with pockets for sprags (4a, 5a 6a) of sufficiently large numbers and the sprags are contained at portions of the pockets. The pockets of a number the same as a number of pieces of using the sprags may be formed at any of the annular members of the outer side cage (4) and the like.Type: GrantFiled: August 1, 2003Date of Patent: August 23, 2005Assignees: Koyo Seiko Co., LTD, Honda Giken Kogyo Kabushiki KaishaInventors: Yoshihisa Miura, Tetsuya Otani
-
Patent number: 6892868Abstract: A one-way clutch includes a retainer (3), a spring (4) guided by the retainer, and sprags (5) which are pivotally provided in respective pockets of the retainer and respective pockets of the spring. A rounded section (4c) is formed on an outer diameter side of each of tongue-like flaps (4t) of the spring. Guide sections (3c, 3c) are formed at respective corners on one side of each pocket with respect to a circumferential direction thereof. The width (D) of a space between the guide sections is set so as to become greater than the width (T) of each of the tongue-like flaps formed in the spring, and the rounded section (4c) is housed in the space between the guide sections.Type: GrantFiled: July 3, 2002Date of Patent: May 17, 2005Assignees: Koyo Seiko Co., Ltd., SKF FranceInventors: Yoshihisa Miura, Tetsuaki Numata, Marc Le Calve
-
Patent number: 6851497Abstract: A power-assisted bicycle includes a torque detection mechanism system that is simple in structure, saves space, and is lightweight. A one-way clutch (72) for transmitting only rotation of the drive shaft (4) to the sprocket (70) in the direction in which the bicycle proceeds is disposed inside a hollow cylindrical portion (82) of the sprocket (70). On the sprocket face opposite thereto, a bearing (74) is engaged with an outer periphery of the cylindrical portion (82), and an elastic disc spring (76) holds the sprocket (70) with the aid of the bearing. The disc spring (76) is fixed to the bicycle body and a strain gauge (80) for detecting a stress deformation of the disc spring (76) is mounted on the surface thereof.Type: GrantFiled: June 5, 2000Date of Patent: February 8, 2005Assignees: Sunstar Giken Kabushiki Kaisha, Sunstar Suisse SAInventors: Akihito Yoshiie, Kyosuke Kokatsu
-
Patent number: 6840362Abstract: A shifting element system for a transmission comprising at least one first shifting element (10) and one free wheel (20) wherein one input element of the free wheel (20) is mechanically coupled with one input element of the first shifting element (10) and wherein one output element of the free wheel (20) is non-torsionally connected with one output element of the first shifting element (10). It is proposed that input and output elements of the first shifting element (10), discs (17) of the first shifting element (10), a free wheel (20) and input and output elements of the free wheel (20) form a pre-assemblable unit wherein a free-wheel sprag unit (27) of the free wheel (20) has one bending elastic holding device (28) by which the input element of the free wheel (20), during and after assembly of the pre-assembled unit, is axially movably secured opposite the output element of the first shifting element (10).Type: GrantFiled: August 21, 2003Date of Patent: January 11, 2005Assignee: ZF Friedrichshafen AGInventors: Eberhard Biermann, Peter Tiesler
-
Patent number: 6824010Abstract: A selective actuating apparatus involves a barrel 17 rotated due to rotation of a driving motor 2, a revolving shaft 3A supporting rotatably the barrel 17, and a barrel 16 rotated as a result of transmitting torque in the case where the barrel 17 is rotated in a direction b indicated by an arrow wherein a cam section 16B is defined on the barrel 16. In this condition, when the barrel 17 rotates in a direction a indicated by an arrow, the torque does not transmit to the barrel 16, but the barrel 16 is allowed to displace along the revolving shaft 3A due to sliding motion in between a projection 16A formed on the barrel 16 and a projection 17D formed on the inner circumference of the barrel 17 in a stepped manner. As a result, the selective actuating apparatus by which a plurality of driving objects can be driven without requiring a plurality of driving sources, so that its driving system can be downsized is obtained.Type: GrantFiled: September 29, 2000Date of Patent: November 30, 2004Assignee: Fuji Electric Co., Ltd.Inventor: Hajime Erikawa
-
Publication number: 20040226798Abstract: The present invention provides a one-way clutch comprising sprags disposed between outer and inner races which are rotated relative to each other and adapted to transmit torque, spring members for biasing the sprags toward an engagement direction, and a cage which has a plurality of window portions for holding the sprags and in which a column portion between the adjacent window portions is partially cut at a predetermined position to connect between the adjacent window portions and the column portion is bent to form an elastic piece elastically engaging with the outer race or the inner race, and wherein a recessed portion is provided in a side surface of a bent portion of the elastic piece in a bent direction.Type: ApplicationFiled: March 1, 2004Publication date: November 18, 2004Applicant: NSK-WARNER K.K.Inventors: Seiji Nishimura, Hideki Oki, Tetsuya Wakamori
-
Patent number: 6814203Abstract: A stator is provided with an impeller and a one-way clutch. The stator includes at least one plain bearing and at least one side plate. The plain bearing is arranged adjacent to and on an axially outer side of a side portion of the one-way clutch and between an inner ring and an outer ring of the one-way clutch, and on its inner and outer peripheries, has flanges with bearing tracks formed thereon. The side plate is arranged on an axially outer side of the plain bearing and at a position adjacent to the plain bearing such that the side plate serves not only as a stopper for the plain bearing but also as a bearing track for a needle bearing. The plain bearing and side plate are provided with engageable portions, respectively, and are maintained in engagement with each other via the engageable portions.Type: GrantFiled: June 9, 2003Date of Patent: November 9, 2004Assignee: NSK-Warner K.K.Inventors: Taiji Kamiya, Hirobumi Shirataki
-
Patent number: 6796413Abstract: A one-way clutch of the invention includes an inner race supported for rotation on a power transmission shaft, an outer race concentrically surrounding the inner race, and torque transmitting members interposed between the inner race and the outer race and capable of transmitting torque in one direction of the inner race to the outer race. The outer race is integrally provided with an extending portion that extends inwardly in a radius direction thereof. The extending portion is capable of being engaged with the power transmission shaft.Type: GrantFiled: October 29, 2002Date of Patent: September 28, 2004Assignees: Musashi Seimitsu Kogyo Kabushiki Kaisha, Kyushu Musashi Seimitsu Kabushiki KaishaInventors: Kiyotaka Fukui, Tadashi Miyamoto
-
Patent number: 6769328Abstract: A hand tool for applying a torque to a threaded fastener includes a tool body having an opening and a fastener engaging mechanism rotatably mounted in the opening. A control assembly comprising a cylindrical roller, spring assembly and control switch are mounted with respect to the tool body. The spring assembly biases the roller against surfaces on the tool body and the fastener engaging mechanism. The roller the releasably locks the faster engaging mechanism to the tool body when the tool body is rotated through a drive stroke. The tool body can be moved through drive and return strokes of any arc length with no significant lost motion.Type: GrantFiled: January 24, 2003Date of Patent: August 3, 2004Assignee: The Stanley WorksInventors: Amit Patel, Ajay Garg
-
Patent number: 6755292Abstract: An end bearing, a one-way clutch device and a method of manufacturing the end bearing, capable of preventing abrasion or scorching of the end bearing while improving the productivity. The annular end bearing which is interposed between an inner race and an outer race of the one-way clutch device and is in a slidable contact with the inner race or the outer race when it is operated, wherein a recess having the depth of 5 to 30 &mgr;m is formed on a slidable contact surface with inner race or the outer race. The method comprises a blanking step of blanking an annular blank from a metal plate, a recess forming step of forming a recess in a predetermined portion of said blank, and a drawing step of forming a flange on said blank by drawing, wherein the above recess forming step is executed before or after the blanking step, or at the same time with the blanking step.Type: GrantFiled: February 14, 2002Date of Patent: June 29, 2004Assignee: NSK-Warner K.K.Inventors: Norihiro Yamamoto, Hirofumi Ogata
-
Patent number: 6755293Abstract: An RPM-responsive automatic sprag overrunning clutch includes a hub adapted to be attached to a drive shaft, a ring gear surrounding the hub and spaced therefrom, and a plurality of sprags positioned between the hub and the ring gear. An actuator mechanism secured to the hub includes a pair of movable segments and a pair of rollers which are free to move radially of the hub under the influence of centrifugal force as the clutch is increasingly rotated. All the movable segments are connected to an annular plate which is pinned to each of the sprags such that circumferential movement of the movable segments is transmitted to the sprags to shift them into or out of wedging relationship between the hub and the ring gear.Type: GrantFiled: April 2, 2002Date of Patent: June 29, 2004Inventors: Lamar Nathan Jensen, Charles Liu
-
Publication number: 20040112703Abstract: A clutch assembly (10) having an inner race (12), an outer race (14), and an engagement mechanism (16) disposed between the inner and outer races. The engagement mechanism (16) is operable to move between a disengaged position wherein the inner and outer races may freely rotate in one direction relative to one another and an engaged position wherein in the inner and outer races are locked so as to translate torque therebetween in the opposite rotational direction. The inner race (12) and outer race (14) may be defined by a plurality of plates (18, 22) and layers of elastomer (20, 24) that are disposed between adjacent plates in laminated fashion. The inner race and/or outer race may further include at least one bearing surface through which a force may be translated. The bearing surface is defined by a plurality of plates (70, 76) that are offset relative to an adjacent plate by a predetermined distance.Type: ApplicationFiled: December 12, 2002Publication date: June 17, 2004Inventor: John M. Kremer
-
Publication number: 20040094382Abstract: A one-way clutch having a plurality of sprags (3) arranged at an annular space between a driving side member and a driven side member along a circumferential direction thereof, two cages (4, 5) on an outer side and an inner side for retaining the sprags, and a spring member (6) in an annular shape, in which the outer side cage (4), the inner side cage (5) and the spring member are respectively formed with pockets for sprags (4a, 5a 6a) of sufficiently large numbers and the sprags are contained at portions of the pockets. The pockets of a number the same as a number of pieces of using the sprags may be formed at any of the annular members of the outer side cage (4) and the like.Type: ApplicationFiled: August 1, 2003Publication date: May 20, 2004Inventors: Yoshihisa Miura, Tetsuya Otani
-
Patent number: 6732843Abstract: A one-way clutch includes a retainer (1), a spring (2), and sprags (3) which are provided in pockets of the retainer and those of the spring in a pivotable manner and forced by tongue-like flaps formed in the spring in a direction in which the sprags (3) are to be locked. A peripheral maximum width (La) of an outer cam surface of the sprag (3) and a peripheral maximum width (Lb) of an inner cam surface are greater than a circumferential width (Lp) of the pocket of the retainer (1). Further, a width (Lc) of the sprag (3) in the direction of inclination is made smaller than a circumferential width (Lp) of the pocket of the retainer (1).Type: GrantFiled: July 12, 2002Date of Patent: May 11, 2004Assignee: Koyo Seiko Co., Ltd.Inventors: Yoshihisa Miura, Tomomasa Kubo
-
Publication number: 20040074730Abstract: The present invention provides a one-way clutch in which spring force of tongue pieces of a spring will not be decreased, even in case where a larger tightening margin is provided between a cage and an outer race, but proper spring force can be maintained thereby to attain reliable synchronization between the outer race and the cage, and a rise of cost will not be incurred. The one-way clutch includes a cage, a spring arranged along an inner diameter side of the cage, and a sprag assembly. Each of sprag is inserted into pockets of the spring and cage, respectively. One end of the spring is overlapped with the other end at a position where the largest repulsive force is exerted from the cage. Thereby, rigidity of the spring is increased in a part of the spring corresponding to the position.Type: ApplicationFiled: July 31, 2003Publication date: April 22, 2004Applicant: Koyo Seiko Co., Ltd.Inventor: Yoshihisa Miura
-
Patent number: 6705445Abstract: A one-way clutch includes: an inner race; an outer race; a plurality of engaging members disposed between the inner and the outer races; a pair of retainers for retaining the engaging members; springs for urging the engaging members in one direction; and a pair of end bearings which are respectively disposed on both sides between the inner race and the outer race, each of the end bearings being formed into a U-shaped cross section by a first hollow cylindrical portion fitted to an outer peripheral surface of the inner race, a second hollow cylindrical portion fitted to an inner peripheral surface of the outer race, and an annular portion connecting the first and the second hollow cylindrical portions. The one-way clutch is characterized in that recessed portions (11) are formed at least in the inner peripheral surface (8a) of the first hollow cylindrical portion (8) of each of the end bearings (7).Type: GrantFiled: September 10, 2001Date of Patent: March 16, 2004Assignee: Koyo Seiko, Co., Ltd.Inventor: Takaaki Ikeda
-
Patent number: 6698303Abstract: An automated gear drive, comprising two main gearshafts (18, 20) bearing drive pinions (22, 24) and linked each by a clutch (E1, E2) to a clutch shaft (10), a gearbox output shaft (12) bearing driven pinions (26) each of which is associated with one-way locking device (28) controlled to be selectively interlocked with the gearbox output shaft (12), the one-way locking device (28) being controlled by mechanical device (30, 32, 34) common to all the loose pinions (26) of the different gear ratios. The automated gear drive enables in particular gear ratio shift with uninterrupted torque transmission to the gearbox output shaft (12).Type: GrantFiled: October 26, 2001Date of Patent: March 2, 2004Assignee: ValeoInventors: Christian Hoffmann, Pascal Thery
-
Publication number: 20040035671Abstract: A one-way clutch includes: an inner race; an outer race; a plurality of engaging members disposed between the inner and the outer races; a pair of retainers for retaining the engaging members; springs for urging the engaging members in one direction; and a pair of end bearings which are respectively disposed on both sides between the inner race and the outer race, each of the end bearings being formed into a U-shaped cross section by a first hollow cylindrical portion fitted to an outer peripheral surface of the inner race, a second hollow cylindrical portion fitted to an inner peripheral surface of the outer race, and an annular portion connecting the first and the second hollow cylindrical portions. The one-way clutch is characterized in that recessed portions (11) are formed at least in the inner peripheral surface (8a) of the first hollow cylindrical portion (8) of each of the end bearings (7).Type: ApplicationFiled: August 21, 2003Publication date: February 26, 2004Applicant: Koyo Seiko Co., LtdInventor: Takaaki Ikeda
-
Patent number: 6675941Abstract: A coupling device including a turbine and an impeller with an intervening reactor including a reactor body whereof the central part is linked in rotation with the output shaft via an overrunning clutch having an outer ring, intermediate locking elements, and at least a directly mounted lateral flange, generally shaped like a transversely oriented washer axially immobilized relative to the central part of the reactor body and extending radially inwards so as to co-operate, by its internal periphery, with a portion opposite the inner ring to link the reactor body in axial translation and guide it rotation with the inner ring. An element having a general rod-like shape is provided which axially passes, at least partly, through the outer ring of the overrunning clutch or the reactor body, or extends axially inside the overrunning clutch.Type: GrantFiled: March 15, 2002Date of Patent: January 13, 2004Assignee: ValeoInventors: Rabah Arhab, Daniel Satonnet
-
Publication number: 20040003976Abstract: A freewheeling clutch includes torque transmitting elements disposed between an inner race and an outer race. The elements include active surfaces that may be defined by an angularly variable radius of curvature that varies with respect to roll angle at an increasing rate, such as an equiangular spiral, to form a constant strut angle as the elements move between a freewheeling and an engaged position.Type: ApplicationFiled: July 3, 2002Publication date: January 8, 2004Inventors: Jack E. Pederson, Duane A. Bacon, Alfred J. Chiesa
-
Publication number: 20030226732Abstract: A stator is provided with an impeller and a one-way clutch. The stator includes at least one plain bearing and at least one side plate. The plain bearing is arranged adjacent to and on an axially outer side of a side portion of the one-way clutch and between an inner ring and an outer ring of the one-way clutch, and on its inner and outer peripheries, has flanges with bearing tracks formed thereon. The side plate is arranged on an axially outer side of the plain bearing and at a position adjacent to the plain bearing such that the side plate serves not only as a stopper for the plain bearing but also as a bearing track for a needle bearing. The plain bearing and side plate are provided with engageable portions, respectively, and are maintained in engagement with each other via the engageable portions.Type: ApplicationFiled: June 9, 2003Publication date: December 11, 2003Applicant: NSK-Warner K.K.Inventors: Taiji Kamiya, Hirobumi Shirataki
-
Patent number: 6640949Abstract: A one-way bearing is provided having sprags and rolling bearings both disposed between an inner and an outer race. The sprags may comprise three-dimensional sprags for preventing rotation in a non-preferential direction. The rolling bearings may comprise thrust rollers for transmitting axial, tilt, and radial loads between the inner and outer races.Type: GrantFiled: March 1, 2002Date of Patent: November 4, 2003Assignee: The United States of America as represented by the Administrator of the National Aeronautics and Space AdministrationInventor: John M. Vranish
-
Publication number: 20030183473Abstract: An RPM-responsive sprag overrunning clutch which includes a hub adapted to be attached to a drive shaft, a ring gear surrounding said hub and spaced therefrom, and a plurality of sprags positioned between said hub and ring gear. An actuator mechanism secured to the hub which includes a pair of movable segments and a pair of rollers which are free to move radially of said ring gear under the influence of centrifugal force as the clutch is rotated. Said movable segments being connected to an annular plate which is pinned to each of said sprags such that circumferential movement of the movable segments is transmitted to said sprags to shift them into or out of wedging relationship between the hub and ring gear.Type: ApplicationFiled: April 2, 2002Publication date: October 2, 2003Inventors: Lamar Nathan Jensen, Charles Liu
-
Patent number: 6612107Abstract: A one-way clutch includes poles and springs accommodated in pockets defined in an inner peripheral surface of an outer race. The poles are urged toward an outer peripheral surface of the inner race by resilient forces of the springs, thereby inhibiting the relative rotation of the inner race and the outer race relative to each other in one direction, and permitting the relative rotation of the inner race and the outer race relative to each other in the other direction. Each of the poles has a partially columnar support projection, and an engage portion comprising a convex curved surface. The support projection is swingably supported in and substantially in face contact with a partially columnar support recess defined in the pocket. The engage portion is in line contact with the outer peripheral surface of the inner race comprising the columnar surface.Type: GrantFiled: April 16, 2002Date of Patent: September 2, 2003Assignee: Yutaka Giken Co., Ltd.Inventor: Naoto Sato
-
Patent number: 6591955Abstract: A freewheel device includes at least one cage, a plurality of wedging members retained by the cage, and a member having a cylindrical surface which comes into contact with the cage. The cage has an axial portion provided with windows which receive immobilizing members and at least one generally annular and substantially radial portion having a flexing area and a plurality of tongues which are of substantially radial shape in a relaxed state and which flex in an axial direction so that ends of the tongues are in frictional contact with the cylindrical surface so that they are circumferentially and axially connected to the surface.Type: GrantFiled: October 29, 2001Date of Patent: July 15, 2003Assignee: Aktiebolaget SKFInventor: Marc Le Calve
-
Patent number: 6591956Abstract: An inner cylinder 5 supports and drives a hub shell 1. A sprocket hub 10 is rigidly mounted on one end of the cylinder, and may be integral with it. A bearing 2 at each end of the axle supports the cylinder and sprocket hub for rotation about the axle 1 Outer bearings 16 between the cylinder and hub shell rotationally supported hub shell. A circular ratchet 8 in the interior of the hub shell, and corresponding pawls 6 on the exterior of the cylinder, drive the hub shell when torque is applied to th sprocket hub, and allow the shell to freewheel otherwise. A more central position of the pawl drive in the hub shell compare to prior designs reduces twist of the shell. Wide separation of the bearings supporting the sprocket hub and cylinder provide a highly stable sprocket hub. These features maximize transmission efficiency and reliability.Type: GrantFiled: April 29, 2002Date of Patent: July 15, 2003Assignee: Cane Creek Cycling Components, Inc.Inventor: John J. Neugent
-
Patent number: 6571925Abstract: One or more levers are carried by one of the races, each in its respective recess. The lever's fulcrum is in contact with an arc in the recess. Motion between the inner and outer races is transmitted through the lever and the arc. The transmission is essentially normal to the radial. Indexing causes the lever to tilt back and forth on its fulcrum, which brings the contact surfaces between the lever's arm and the opposite race into and out of contact. The tilt comes from the angular displacement of a pin carried by the lever's second arm. Motion change in the opposite race causes the angular displacement.Type: GrantFiled: May 16, 2000Date of Patent: June 3, 2003Inventor: Robert L. Giuliani
-
Patent number: 6571926Abstract: A planar one-way clutch includes a pair of clutch members whose operative faces are disposed in close-spaced opposition, with each clutch face including a plurality of recesses defining respective load-bearing shoulders. A plurality of struts, disposed between the coupling faces of the members, and movable between a coupling position and a non-coupling position, mechanically couple the members for rotation when one member rotates in one direction relative to the other member, while further permitting clutch overrun when the one member rotates in the other direction relative to the other member. The recesses of one member each include a ramped surface opposite the member's load-bearing shoulder. Each ramped surface includes a convex surface portion which engages the struts during clutch overrun so as to urge the struts into the non-coupling position.Type: GrantFiled: February 12, 2001Date of Patent: June 3, 2003Assignee: Means Industries, Inc.Inventor: Brice Pawley
-
Patent number: RE38498Abstract: A one-way clutch apparatus comprising a driving member having a plurality of recesses, a corresponding plurality of biasing members disposed in the recess, a corresponding number of keys or struts disposed over the biasing members in the recesses, and a driven member having a plurality of key-engaging notches formed circumferentially about an inside surface. Each of the keys includes a pair of laterally protruding arm portions and each of the arm portions has a ramp formed thereon which acts as a relief to allow the inside surface of the driven member to be placed to close proximate relationship with the inside surface of a driving member and to overlay portions of the recess.Type: GrantFiled: January 28, 1999Date of Patent: April 20, 2004Assignee: Means Industries, Inc.Inventors: Stephen M. Ruth, Brian D. Klecker, A. Richard Frank