Abstract: A coupling includes left and right side members, and a centre member that is disposed between the side members. The centre member has a main axis of rotation, and includes holes disposed about the main axis at a radius. The side members each have a common offset axis of rotation parallel to and offset from the main axis. Each side member includes holes congruent with the holes in the centre member and disposed about the offset axis at the radius. Torque transfer elements extend through the holes of the centre member and into the holes of the side members. The torque transfer elements rotate about a third axis parallel to and disposed midway between the main axis and the offset axis, and transfer torque between the centre member and the side members through rolling contact between the torque transfer elements and the holes of the centre and side members.

Abstract: A multistage pericyclic gear reducer includes an input shaft, an input external-teeth gear coaxially coupled to and rotatable with the input shaft, a first middle planet ring gear coupled between a first driver ring gear and a first driven wheel. The first driver ring gear meshed with the input external-teeth gear. The multistage pericyclic gear reducer further includes a second middle planet ring gear coupled between the first driven wheel and a second driven wheel, an output external-teeth gear extended through and meshed with both the first middle planet ring gear and the second middle planet ring gear, and a central output shaft coupled to the output external-teeth gear.

Abstract: A pericyclic gear reducer may include a middle planet ring gear coupled between a driver ring gear and a driven wheel utilizing a first prismatic joint on a first side of the middle planet ring gear and a second prismatic joint on a second side of the middle planet ring gear. The pericyclic gear reducer may further include an input shaft rotatably coupled to the driver ring gear and the driver ring gear configured to transfer the rotational movement of the input shaft to the middle planet ring gear. The pericyclic gear reducer may further include an output sun gear coupled to the middle planet ring gear. The output sun gear further rotatably coupled to a central output shaft.

Abstract: A circular wave drive system is provided. In one aspect, the drive comprises: a compliant input ring gear, wherein input ring gear includes internal input ring gear teeth; an input cycloidal disc having an outer surface, wherein the input cycloidal disc includes external input cycloidal disc gear teeth, and wherein the external gear teeth engage the internal gear teeth; a compliant primary drive gear having an outer surface, wherein the primary drive gear includes external primary drive gear teeth; an eccentric motion generator having an eccentric portion and a non-eccentric portion and wherein a centerline of the eccentric portion and the non-eccentric portion are offset, and wherein the eccentric motion generator includes a hollow central bore; and an output cycloidal disc, wherein the output cycloidal disc includes internal output cycloidal disc teeth, and wherein the internal output cycloidal disc teeth engage the external primary drive gear teeth.

Abstract: A one-to-one torque coupling includes a centre member, left and right side members, and a plurality of torque transfer elements. The centre member is disposed between the side members, has a main axis of rotation and includes a plurality of holes disposed about the main axis at a radius. The side members each have a common secondary axis of rotation that is parallel to and offset from the main axis. Each side member also includes a plurality of holes that are congruent with the holes in the centre member and are disposed about the secondary axis at the radius. The torque transfer elements extend through the holes of the centre member into the holes of the side members, and rotate about a third axis that is parallel to and disposed midway between the main axis and the secondary axis. The torque transfer elements transfer torque between the centre member and the side members through rolling contact between the torque transfer elements and the holes of the centre and side members.

Abstract: A rotation transmitter includes a first member, a second member, and an intermediate member. The first member is connected to the intermediate member by a first rotary mechanism. The second member is connected to the intermediate member by a second rotary mechanism. A second rotary mechanism includes: a second radial pin supported by a first one of the second member and the intermediate member; a plurality of pairs of rollers disposed at different positions of the second radial pin and each of the pairs of rollers holding the second radial pin therebetween; axial pins supporting the respective rollers while supported by a second one of the second member and the intermediate member; and stroke bearings respectively interposed between the rollers and the axial pins and supporting the rollers so that the rollers are rotatable around the axial pins and movable in a direction of the rotation axis.

Abstract: A scroll fluid machine comprises a fixed-side member including a cylindrical casing and a fixed scroll fixed to the casing, and an orbiting scroll and a plurality of ball coupling devices provided between the fixed-side member and the orbiting scroll to prevent self-rotation of the orbiting scroll on its axis and receive a thrust load between the fixed-side member and the orbiting scroll. Each of the ball coupling devices comprises a first ball coupling mechanism for supporting the thrust load generated between the fixed-side member and the orbiting scroll and a second ball coupling mechanism disposed with a space from the first ball coupling mechanism to prevent the self-rotation of the orbiting scroll.

Abstract: The present invention provides a scroll type fluid machine realizing reduced attachment space in a casing and improvement in workability at the time of assembly and the like by using a plurality of ball coupling mechanisms. A plurality of ball coupling mechanisms are disposed between a casing and a rear side of an orbiting scroll. Each of the ball coupling mechanisms includes first and second thrust receivers (reception plates), a sphere, and a cylindrical ring. A thrust load to be applied to an end plate of the orbiting scroll is received between the first and second thrust receivers (reception plates) and the sphere. The cylindrical ring disposed between the first and second thrust receivers displays a so-called rotation preventing effect in such a manner that its outer peripheral surface makes a rolling contact with inner peripheral surfaces of cylindrical portions in association with an orbiting motion of the orbiting scroll.

Abstract: In a pump driving device in an engine, driving a pump shaft of a pump mounted to an engine body by a valve-operating cam shaft supported by the engine body, a bolt is threadedly engaged with one end of the cam shaft, the bolt having a head portion in which a polygonal hole is formed, and a polygonal shaft portion is formed at one end of the pump shaft so as to be fitted into the polygonal hole. The pump shaft is driven by the cam shaft via the polygonal hole and the polygonal shaft portion. Thus, a large driving torque can be transmitted from the cam shaft to the pump shaft without reducing any effective support surface of a journal portion of the cam shaft.

Abstract: A scroll compressor includes an orbiting scroll engaged with a front case by pins and rings or ring holes to prevent rotation of the orbiting scroll. The rings or the ring holes have such an inside diameter that an orbiting radius defined by the pins and the rings or the ring holes is larger than a theoretical orbiting radius defined by engagement between gear surfaces of a fixed scroll and the orbiting scroll. The pins, the rings, or the ring holes are shifted in such a direction as to relieve twisting of the orbiting scroll relative to the fixed scroll.

Abstract: A control system for a vehicle having first and second wheels is provided that includes a differential apparatus adapted to distribute torque between the first and second wheels and a traction controller for controlling operation of the differential apparatus from vehicle launch up to a predetermined vehicle speed. The traction controller is configured to engage the differential apparatus in a first operating state according to at least one vehicle operating parameter indicative of a low traction operating condition and to further control engagement of the differential apparatus in a second vehicle operating state during the low traction operating condition according to a difference between an actual vehicle yaw rate and a predetermined target vehicle yaw rate. The control system also includes a stability controller for controlling engagement of the differential apparatus at or above the predetermined vehicle speed.

Abstract: A shaft coupling includes plates fitted on ends of input and output shafts, respectively. A plurality of guide grooves are formed in the opposed surfaces of the plates, respectively, so that each of the grooves extends perpendicular to the corresponding groove formed in the other plate. A steel ball is disposed between each pair of guide grooves of the plates at a portion where the pair of grooves cross each other. When the steel balls are pushed by the driving plate, they push the driven plate while rolling in the guide grooves, with their movements restricted by a retainer in the radial direction of the plates. Thus, large power can be smoothly transmitted between the rotary members with less frictional resistance. The offset amount can be changed easily. Between the plates, there are only the steel balls and the retainer.

Abstract: There is provide a shaft coupling of the type which can transmit power between two parallel shafts through rolling elements disposed at intersecting portions of guide grooves that intersect each other at a right angle which can always stably transmit power. Guide grooves 5 and 6 are formed in opposed surfaces of two plates 1 and 2 such that each adjacent pair of guide grooves formed in each of the plates extend in a direction that forms an angle of 45 degrees with a reference line X connecting the midpoint between their respective intersecting portions and the center of the plates. Elongated holes 7 are formed in the retainer 4 so that each elongated hole extends along a straight line connecting the two adjacent intersecting portions between the two adjacent pairs of opposed guide grooves. Each elongated hole 7 and two pairs of opposed guide grooves 5 and 6 form a pair of rolling element guide mechanisms.

Abstract: An object is to provide a shaft coupling of the type in which power is transmitted between two parallel shafts through rolling elements each disposed at the intersecting portion of two guide grooves that intersect each other at a right angle which always operates stably. The rolling elements 3 are cylindrically shaped, and have both ends thereof guided by the respective guide grooves 5 and 6 of the plates 1 and 2 with their central portions each passed through and held by an elongated hole 7 formed in the retainer 4, and sliders 10 are provided each extending from the outer periphery of one of the rolling elements 3 in the shape of a flange and engaging the retainer 4, thereby preventing each rolling element 3 from pivoting in a plane including an axis of the rolling element. With this arrangement, it is possible to prevent forces in the axial direction of the rotary members from acting on the rolling elements, thereby preventing axial movements of the rotary members.

Abstract: An apparatus for transmitting torque from a driving unit to a driven unit, comprising the first unit, the second unit and a plurality of torque transmission units. The first unit serves as the driving unit, which is rotatable around a central axis thereof. The second unit serving as the driven unit, which is rotatable around a central axis thereof. The torque transmission units transmits torque from the first unit to the second unit. The torque transmission units enables a relative displacement between the first unit and the second unit in a direction perpendicular to the central axis of the first unit in a state in which the central axes of the first and second units are kept in parallel with each other. The torque transmission units are placed at different positions from the central axis of the first unit.

Abstract: In a scroll fluid machine, a stationary scroll fixed to a housing engages with an orbiting scroll to form a sealed chamber between the orbiting and stationary scrolls. Fluid in the sealed chamber is compressed or decompressed with revolution of the orbiting scroll with respect to the stationary scroll. A plurality of self-rotation preventing devices are provided on the orbiting scroll to prevent the orbiting scroll from rotating on its own axis. The self-rotation preventing device comprises an eccentric tube connected to a main shaft fitting in the housing, and an eccentric shaft fitted in a bearing plate. The eccentric tube is eccentrically revolved with respect to the main shaft thereby allowing engagement of the orbiting scroll with the stationary scroll to be adjusted.

Abstract: An apparatus for transmitting torque from a driving unit to a driven unit, comprising the first unit, the second unit and a plurality of torque transmission units. The first unit serves as the driving unit, which is rotatable around a central axis thereof. The second unit serving as the driven unit, which is rotatable around a central axis thereof. The torque transmission units transmits torque from the first unit to the second unit. The torque transmission units enables a relative displacement between the first unit and the second unit in a direction perpendicular to the central axis of the first unit in a state in which the central axes of the first and second units are kept in parallel with each other. The torque transmission units are placed at different positions from the central axis of the first unit.

Abstract: Large parallel and angular misalignment capabilities between coupled rotary shafts are provided in a torsionally rigid coupling by slidable and rotatable medial mounting of each of two radial, axially spaced, perpendicularly disposed torque pins through axially spaced radially perpendicular apertures through an axial connector and slidably trapping each end of each radial torque pin in an arcuate path between two apposed arms of one of two radially opposed forks projecting inwardly about either end of the axial connector from one of two yoked hubs. The perpendicular relation of the torque pins and slidable and rotatable medial mounting through the axial connector with ends trapped in opposed arcuate paths between radially opposed forks of each yoked hub allows displacement of the torque pins, with respect to the axial connector or the yoked hubs, about three mutually perpendicular axes thereby accommodating parallel and angular misalignment between coupled rotary shafts.

Abstract: Rotation interception mechanisms (10) are mounted to intervene between a drive casing (22) and a substrate (60) of a movable scroll (54), and include a binding member (11) for binding rotation of the movable scroll, a fixed side pin (14) provided with protrusion in the drive casing to get engaged with the binding member, and a swivel side pin (15) provided with protrusion in the movable scroll to get engaged with the binding member for being restrained by the binding member and swiveling around a shaft center of the fixed side pin; and load alleviation means (54h) alleviates a load onto the fixed side pin and the swivel side pin caused by the torque due to the distance between the gravity center (O) and the rotation center (OR) of the movable scroll and the centrifugal force.

Abstract: A scroll-type compressor includes a fixed and an orbiting scroll each having an end plate. A ball coupling means preventing the orbiting scroll from rotating, includes a first race and a second race and a plurality of balls. The balls are engaged between ball rolling grooves on the first race and ball rolling grooves on the second race. Each of an interior circular portion and an exterior circular portion of the first race and the second race is connected to the orbiting scroll and the front housing. Each of a clearance is created between the first race and the orbiting scroll, and between the second race and the front housing. The structure for the scroll-type compressor according to this invention may reduce the number of parts compared to known scroll-type compressor, and may maintain stability of an orbital motion of an orbiting scroll, when thrust load is high.

Abstract: A scroll compressor (10) includes a housing (11) with a stationary scroll member (13) mounted therein and a swivel scroll member (12) positioned in the housing and cooperating with the stationary scroll member to form a compression chamber (16). A thrust bearing has a first bearing ring (40) for attachment to the housing (11) and having a plurality of circular bearing races (42,54), a second bearing ring (45) for attachment to the swivel scroll member (12) and having a plurality of circular bearing races (47,55), and a plurality of balls (56) retained between the rings in associated pairs of the races. The races can have rounded tip (50,51), pointed tip (57,59,60,61,62), plateau (52,53) or flat center (54,55) portions. The first bearing ring (40) can have a thickness (C) different than a thickness (D) of the second earing ring.

Abstract: A scroll-type compressor includes a fixed first scroll member, an orbital second scroll member, and a ball coupling provided as a rotation preventing mechanism for the second scroll member. The ball coupling has a pair of integrally formed rolling ball regulating plates and a plurality of balls disposed therebetween. The ball coupling is assembled in the compressor at a condition in that an axial preload is provided. The axial preload is set more than an axial force given by the balls to the rolling ball regulating plates during operation of the compressor for correcting deformation of the rolling ball regulating plates. When the compressor is assembled, an axial gap between the first and second scroll members may be properly adjusted. After the assembly and during the operation of the compressor, the behavior of balls may be stable.

Abstract: A movable race 25 fixed to a movable scroll 20 which revolves with respect to a fixed scroll and a fixed race 24 opposing the movable race are respectively provided with pluralities of annular ball rolling grooves 24c and 25c extending along the revolutionary locus of the movable scroll and a plurality of balls 26 are held sandwiched between the plurality of ball rolling grooves 25c of the movable race and the plurality of ball rolling grooves 24c of the fixed race. Further, the radius of revolution S1 to be obtained by the movable race, the plurality of balls, and the fixed race is made smaller than the radius of revolution S2 to be determined by the scroll wall of the movable race and that of the fixed race.

Abstract: A ball coupling constituting a rotation preventing mechanism (77) includes a first annular race section (59, 79) having a thrust ball transfer surface formed on one surface thereof, a second annular race section (61, 81) having a ball transfer surface formed on one surface thereof confronting the one surface of the first race section and thrust balls (67) interposed between the first and second race sections (79, 81). At least one of the first and second race sections has a cross sectional shape such that the central portion of the other surface (87) thereof confronting the one surface is a recessed groove (89). A scroll type compressor includes the rotation preventing mechanism on the back surface of a movable scroll member.

Abstract: In a scroll-type fluid machine in which a movable scroll member (3) is placed between a front housing (1) and a fixed scroll member (4), the movable scroll member is elastically urged towards the fixed scroll member by an urging member. The movable and the fixed scroll members are engaged with each other to form a compression space (6) therebetween. It is preferable that the urging member is composed by at least one of races (24, 25) of a ball coupling (5) which is placed between the stationary and the movable scroll members and is for preventing the movable scroll member from being rotated relative to the fixed scroll member.

Abstract: A rotation preventing mechanism is composed of a thrust ball bearing including a first race section having an annular shape, a second race section disposed at an eccentric position in confrontation with the first race section at intervals and thrust balls interposed between the first and second race sections. The first and second race sections have ball accommodating grooves formed at the confronting surfaces thereof, respectively. Each of the ball accommodating grooves includes a central portion and a groove bottom portion around it. When the radius of curvature of each thrust ball is represented by RB, the radius of curvature of the groove bottom portion on an inner side is represented by Rin and the radius of curvature thereof in an outer side is represented by Rout, and the ball accommodating groove has a shape satisfying a formula RB.ltoreq.Rin<Rout.

Abstract: A fuel injection pump having a pump-and-distributor member driven by a drive shaft via an Oldham coupling. The Oldham coupling has a cross disk with four arms protruding at right angles from one another. In each of the arms, one roller is supported rotatably as a roller body about a radial axis. On the drive disk and the eccentric disk, one pair of claws is mounted, offset from one another by 90.degree.. With these claws, the drive shaft and the eccentric disk, when the Oldham coupling is mounted, engage the interstices between the arms and the cross disk. The engagement is such that the claws each rest axially movably but practically without play on the rollers of the cross disk. In operation, the friction and noise of the Oldham coupling are reduced.

Abstract: A movable race 25 fixed to a movable scroll 20 which revolves with respect to a fixed scroll and a fixed race 24 opposing the movable race are respectively provided with pluralities of annular ball rolling grooves 24c and 25c extending along the revolutionary locus of the movable scroll and a plurality of balls 26 are held sandwiched between the plurality of ball rolling grooves of the movable race and the plurality of ball rolling grooves of the fixed race. Further, the radius of revolution S1 to be obtained by the movable race, the plurality of balls, and the fixed race is made smaller than the radius of revolution S2 to be determined by the scroll wall of the movable race and that of the fixed race.

Abstract: A scroll compressor includes a compressor housing and an orbiting scroll member, and includes an annular plate between the housing and orbiting scroll member. The plate has an axial aperture provided therethrough, the plate abuts one of the housing and orbiting scroll member. A pin projects through the aperture of the plate and is engaged with the member abutting the plate. A projection is provided on the ring, housing or orbiting scroll member for preventing axial displacement of the pin relative to the plate axially away from the abutting member.

Abstract: A combination thrust bearing/coupling apparatus is provided to simultaneously couple an orbiting scroll member with a stationary scroll member. Axial load carrying rolling spheres are provided between the locating indentations of the scroll members. The relative diameters of the spheres and width of the locating indentations permit the spheres to travel a distance equal to one-half of the orbit radius of the orbiting scroll member in all directions from a central position in the respective pair of locating indentations to maintain the predetermined angular relationship between said scroll members. A pair of facing clearance indentations are provided in the orbiting and fixed members. A sphere is provided between the clearance indentations. The relative diameters of the spheres and width of said clearance indentations permit the spheres to travel a distance greater than one-half of said orbit radius of said orbiting scroll member in all directions from a central position in the pair of clearance indentations.

Abstract: A scroll type fluid displacement apparatus comprises a housing having a front end plate and at least one hole formed on an inner surface thereof, a fixed member attached to the housing, an orbiting ring assembly including an orbiting member having an end plate from which an annular member extends, and an orbiting ring fastened to an axial end surface of said end plate of said orbiting member. The orbiting member has at least one hole formed on the axial end surface thereof. The scroll type fluid displacement further comprises a fixed ring assembly attached to the housing, including a fixed ring fastened to an inner surface of the housing facing the orbiting ring of the orbiting assembly. Each of the fixed and orbiting rings have a plurality of corresponding pockets, each pocket on the fixed ring facing a pocket on the orbiting ring of approximately the same size, pitch, and radial distance, and at least one opening formed in each of said fixed and orbiting rings.

Abstract: In a rotation preventing mechanism in which a ball (26) is interposed between a pair of races (24, 25) each having a rolling groove surface (24c, 25c) receiving the ball, the rolling groove surface has a bottom portion (24c3, 25c3) of a radius of curvature which is greater than each of those of an outer peripheral portion (24c1, 24c2) and an inner peripheral portion (25c2, 25c2). Each of the radii of the outer peripheral and the inner peripheral portions is approximate to and greater than the radius of the ball. The races are attached to a front housing (10b) and a movable scroll member (20) which carries out orbital motion along a predetermined orbit with respect to the front housing. The rolling groove surface has an annular shape corresponding to the predetermined orbit.

Abstract: A thrust bearing and coupling component includes a fixed ring fastened to an inner surface of the housing and an orbiting ring fastened to an axial end surface of the end plate of the orbiting member facing the fixed ring. The fixed and orbiting rings have a plurality of corresponding circular pockets, each pocket on the fixed ring faces a pocket on the orbiting ring corresponding in size, pitch, and radial distance. A ball bearing is placed within each facing pair of corresponding pockets. The corresponding pockets interact with the ball bearings to prevent rotation of the orbiting member during orbital motion. The circular pockets include rounded corners formed at the open end thereof which interact non-abrasively with the ball bears. Thus, the rotation preventing and thrust bearing device may be easily constructed and manufactured, and its components may exhibit a longer life.

Abstract: A self-rotation blocking mechanism in a scroll compressor having a movable scroll member and fixed scroll member fixed to a casing. The mechanism is constructed of circumferentially spaced opposing pairs of pins 9 and 10, which are connected to an end plate 12 of the movable scroll member 2 and a faced end wall of the casing 4, respectively, and which are in a side-by-side contacting relationship. The circumferential arrangement of the pins is such that, at every angular position of the movable scroll member, there exists at least one pair of the pins which generates a force in a direction opposite to a self-rotating torque applied to the movable scroll member caused by the compression reaction force. A locally concentrated arrangement of the pairs of the pins for generating such a force can be employed at the angular position which produces a larger value of self-rotating torque.

Abstract: A speed reduction device employing a housing with rotatably mounted input and output shafts. The input shaft includes an eccentric shaft upon which is rotatably mounted a gear wheel. The gear wheel meshes with a ring gear fixed to the housing. The gear wheel has close but not equal to the same number of teeth as the ring gear. A dynamic coupling is provided between the gear wheel and the output shaft. The dynamic coupling includes circular cavities on opposed surfaces on the gear wheel and output shaft, respectively, with balls located between surfaces in the cavities. One set of cavities is enlarged to accommodate the eccentric motion of the gear wheel.

Abstract: The present invention discloses a reliable rotation preventing/thrust bearing device for use in an orbiting member fluid displacement apparatus. The rotation preventing/thrust bearing device includes a discrete fixed portion, a discrete orbital portion, and bearing elements. The fixed portion includes a first annular race and a first ring, both of which are formed separately. The first annular race is placed in a loose fit surrounding a first annular step in an inner surface of the housing and the first ring is attached to the housing. The orbital portion includes a second annular race and a second ring, both of which are formed separately. The second annular race is placed in a loose fit surrounding a second annular step in an end plate of the orbiting member and the second ring is attached to the end plate of the orbiting member. A plurality of pockets of the rings face one another in generally aligned pairs.

Abstract: The present invention discloses an orbiting member fluid displacement apparatus including a rotation preventing and thrust bearing device. The rotation preventing and thrust bearing device includes a fixed portion, an orbital portion, and bearing elements. The fixed portion includes a first annular race and a first ring, which are formed separately. The first annular race is placed in a loose fit within a first annular step in an inner surface of the housing and the first ring is attached to the housing. The orbital portion includes a second annular race and a second ring, which also are formed separately. The second annular race is placed in a loose fit within a second annular step in an end plate of the orbiting member and the second ring is attached to the end plate of the orbiting member. A plurality of pockets are formed in the rings and face one another in substantially aligned pairs.

Abstract: A scroll-type compressor having a unique coupling arrangement for driving the movable scroll is provided. The side of the base portion of the movable scroll opposite the spirals has a plurality of recesses disposed in a circular pattern. A support plate having a plurality of complementary recesses therein is positioned such that its recesses face the recesses in the movable plate. The diameters of the first and second recesses are different from one another. Coupling members are disposed between each facing pair of recesses. The coupling member has small and large diameter portions. The small diameter portion extends into its associated smaller recess while the large diameter portion extends into its larger associated recess. With this arrangement, the required width of the recess bearing portion of the support plate may be reduced relative to conventional designs which has several advantages.

Abstract: The present invention discloses a durable rotation preventing/thrust bearing device for use in an orbiting member fluid displacement apparatus. The rotation preventing/thrust bearing device includes a discrete fixed portion, a discrete orbital portion and bearing elements. The fixed portion includes a first race and first ring both of which are formed separately. The first race is placed in a first groove in an inner surface of the housing and the first ring is attached to the housing. The orbital portion includes a second race and second ring both of which are formed separately. The second race is placed in a second groove in an end plate of the orbiting member and the second ring is attached to the end plate of the orbiting member. A plurality of pockets of the rings face one another in generally aligned pairs.

Abstract: A disengageable coupling generally of the double slider type includes first and third components fixed to the end of shafts to be coupled. A second spider component is slidingly coupled to the first component by interlocking mating surfaces that permit limited radial sliding but prevent axial movement of the spider component. The spider component and third component have disengageable clutch surfaces which also permit radial movement of the spider component with respect to the third component.

Abstract: A scroll compressor having a stationary scroll member and a rotary scroll member. The compressor is provided with a mechanism for obtaining an orbital movement of the rotary scroll member while preventing a rotation thereof about its own axis. The mechanism has a stationary and a rotary ring arranged in parallel and spaced from each other. These rings form a plurality of circumferential spaced facing pairs of circular holes. The mechanism also has shoes arranged in the respective holes and balls arranged between the shoes in the facing pair of holes. The shoes can maintain a parallel location with respect to the corresponding holes, since the shoes are movable relative to the ball. A sealtight contact of the rotary scroll member with the stationary scroll member is realized over a prolonged period.

Abstract: A torque transmitting coupling assembly including a driving member and a power takeoff member, each of which have an equal plurality of claws thereon with movable transmission members interposed between the claws, the claws having lateral surfaces which define therebetween spaces which narrow radially, with the transmission members being held in these spaces by at least one endless flexible traction member which contacts the transmission members on the sides thereof remote from the narrowed portions of the spaces between the claws. The coupling compensates for radial, axial and possibly, also angular offsetting of shafts which are placed in torque transmitting engagement by the assembly.

Abstract: A rotation preventing/thrust bearing device for a scroll type fluid displacement apparatus is disclosed. The rotation preventing/thrust bearing device includes a fixed portion, an orbital portion and balls. The fixed and orbital portions each include an annular race and a ring which covers the end surface of the race. Both rings have a plurality of holes or pockets in an axial direction. The balls are placed between the facing holes in the ring, and are in contact with both races to carry the thrust load from the orbiting scroll member. All balls are rotatably held on a retainer which is disposed in an axial clearance between the facing rings.

Abstract: A rotation preventing/thrust bearing device for use in an orbiting piston type fluid displacement apparatus is disclosed. The rotation preventing/thrust bearing device includes a fixed portion, an orbital portion and bearing elements. The bearing elements are cylinder shaped and placed between facing pairs of pockets formed in the fixed and orbital portion. The bearing elements are axially slidable in the pockets. The outer peripheral surface of the bearing elements contacts the opposing inner walls of the pockets, whereby rotation of the orbiting piston is prevented and the axial thrust load from the orbiting piston is carried through cylindrical shaped elements.

Abstract: Face mechanical transmission equipment for the transfer and transformation of middle and high torques at low and middle speeds. The equipment includes two tandemly arranged and connected face rolling gear units, and makes possible a reduction of speed as high as 1:100.

Abstract: A rotation preventing/thrust bearing device for use in an orbiting member fluid displacement apparatus is disclosed. The rotation preventing/thrust bearing device includes a discrete fixed portion, a discrete orbital portion and bearing elements. The fixed portion includes a fixed race and fixed ring both of which are formed separately. The fixed race is placed in a groove in an inner surface of the housing and the fixed ring is attached to the housing. The orbital portion includes an orbital race and an orbital ring both of which are formed separately. The orbital race is placed in a groove in an end plate of the orbiting member and the orbital ring is attached to the end plate of the orbiting member. A plurality of pockets are formed axially in the rings toward the respective races. The pockets of the rings face one another in generally aligned pairs.

Abstract: A rotation preventing/thrust bearing device for an orbiting member of a fluid displacement apparatus is disclosed. The rotation preventing/thrust bearing device includes a discrete fixed portion, a discrete orbital portion and bearing elements. The fixed and orbital portions each include an annular race and a ring which covers the end surface of the race. Both rings have a plurality of holes or pockets in an axial direction. The radius of the fixed pockets is greater than the radius of the orbital pockets. The bearing elements, one of which is placed between each opposing pair of pockets, roll at radius R1 with regard to the fixed race and roll at radius R2 with regard to the orbital race. The sum of rolling radii R1 and R2 is substantially equal to the radius of the orbiting member.

Abstract: A rotation preventing/thrust bearing device for an orbiting member type fluid displacement apparatus prevents rotation of an orbiting member during orbital motion and carries axial loads from the orbiting member. The rotation preventing/thrust bearing device of the present invention includes a fixed ring which is attached to a housing and an orbit ring which faces the fixed ring and is attached to an end surface of the orbiting piston. These rings have a plurality of corresponding pockets which face each other. Each pocket on the fixed ring faces a pocket on the orbiting ring corresponding in size, pitch and radial distance from the center of the respective rings. A predetermined number of these pockets function as rotation prevention pockets; these rotation prevention pockets have a diameter or size slightly smaller than the remaining pockets.

Abstract: A scroll-type fluid motor or pump is provided with a roller Oldham coupling and bearing for guiding the orbiting scroll wrap relative to the fixed wrap, the coupling including plural, equal diameter cylindrical rollers disposed in overlapping but equally offset cylindrical openings forming bearing surfaces for the rollers. The diameter of each roller is such as to maintain the offset distance so that the orbiting scroll wrap is precisely guided relative to a fixed scroll wrap, whereby radial loads are fully carried by large rolling surfaces provided by the rollers. A magnetic drive system for the orbiting scroll is also disclosed.

Abstract: A new and unique bearing block for torque transmission is disclosed which comprises a bearing block body having two rectangular recesses at both the front and rear sides, said recesses extending at a right angle relative to one another and having plural substantially semi-circular ball rolling grooves on the inner wall of the recesses, a plurality of non-loading ball holes through the bearing block body, track shafts slidably inserted through the rectangular recesses with the corresponding ball rolling grooves provided on the side walls, retainers having plural slits, side covers with ball movement direction reversing U-shaped grooves and a number of balls adapted to circulate through the loading ball rolling grooves, the U-shaped grooves and the non-loading ball holes. As a typical practical application of the bearing block an improved Oldham coupling for torque transmission is disclosed according to another aspect of the present invention.