Abstract: A propeller shaft is proposed which comprises an outer cylindrical member formed with a sleeve portion that has a splined cylindrical inner wall with which a splined cylindrical outer wall of a shaft is engaged; an inner cylindrical member installed in the outer cylindrical member; a torque transmitting unit through which a torque is transmitted from the outer cylindrical member to the inner cylindrical member; and a connecting mechanism that, upon engagement of the splined cylindrical outer wall with the splined cylindrical inner wall, effects an axial and relative positioning between the shaft and the outer cylindrical member while establishing a detachable connection therebetween.

Abstract: A propeller shaft is proposed which comprises an inner cylindrical member that has a center through bore into which a shaft is inserted; an outer cylindrical member disposed around the inner cylindrical member; a torque transmitting unit operatively disposed between the inner and outer cylindrical members; a sleeve member coaxially connected to the center through bore of the inner cylindrical member; a boot unit arranged to hermetically close one open side of an interior of the outer cylindrical member; and a positioning mechanism that effects a relative axial positioning between the shaft and the inner cylindrical member when a splined cylindrical outer wall of the shaft is inserted through the sleeve member into a given position of a splined cylindrical inner wall of the center through bore of the inner cylindrical member.

Abstract: A propeller shaft is proposed which comprises an outer cylindrical member formed with a sleeve portion that has a splined cylindrical inner wall with which a splined cylindrical outer wall of a shaft is engaged; an inner cylindrical member installed in the outer cylindrical member; a torque transmitting unit through which a torque is transmitted from the outer cylindrical member to the inner cylindrical member; and a connecting mechanism that, upon engagement of the splined cylindrical outer wall with the splined cylindrical inner wall, effects an axial and relative positioning between the shaft and the outer cylindrical member while establishing a detachable connection therebetween.

Abstract: A propeller shaft is proposed which comprises an inner cylindrical member that has a center through bore into which a shaft is inserted; an outer cylindrical member disposed around the inner cylindrical member; a torque transmitting unit operatively disposed between the inner and outer cylindrical members; a sleeve member coaxially connected to the center through bore of the inner cylindrical member; a boot unit arranged to hermetically close one open side of an interior of the outer cylindrical member; and a positioning mechanism that effects a relative axial positioning between the shaft and the inner cylindrical member when a splined cylindrical outer wall of the shaft is inserted through the sleeve member into a given position of a splined cylindrical inner wall of the center through bore of the inner cylindrical member.

Abstract: An object of the present invention is to provide a bearing system or a sealing system which has excellent durability when used with the purified water as a lubricating liquid. The present invention relates to a purified water-lubricated bearing system or a purified water-lubricated sealing system having a movable member and a stationary member, in which purified water having an electrical resistance in a range of 1-18.25 M?cm is used as a lubricating liquid. The bearing system or the sealing system is characterized in that a diamond-like carbon film is formed over a slide surface of at least one of said movable member and said stationary member.

Abstract: The present invention aims to provide a composition for protecting a muscle damage having high safety and a stronger muscle damage-protecting effect. The present invention provides a composition for protecting a muscle damage comprising, as an active ingredient, an extract with a lipid-soluble organic solvent of an acetic acid bacterium or preferably an extract with ethyl acetate of an acetic acid bacterium, alkali-stable lipid of an acetic acid bacterium, N-acylsphinganine, sphinganine, amino lipids, or terpenoid compounds. Further, the present invention provides a composition for protecting a muscle damage comprising, as an active ingredient, an extract with a lipid-soluble organic solvent of a vinegar or preferably an extract with ethyl acetate of a vinegar.

Abstract: The present invention is a bearing or seal structure 1 or 10 having a movable member and a stationary member. In the bearing or seal structure, at least one of the movable member 2 or 13 and the stationary member 4 or 14 is made of a material with a coefficient of thermal expansion of 8×106/° C. or less. Polycrystalline diamond is coated on a surface of the member made of the material which lies opposite the other member.

Abstract: A coating material has a first layer deposited on a base material and a second layer deposited on the first layer. The first layer is made of a Ni-base alloy or a Co-base alloy containing carbon as an unavoidable impurity. The second layer is made of a hard material containing carbide and a metal component. The first layer serves as a barrier for preventing carbon from being diffused from the second layer into the base material to prevent the base material from being carburized.

Abstract: A joint structure for a power transmitting member comprising a fiber rein forced plastic tube, a joint comprising a joint portion for joining to an end portion of the tube, and a sealing portion formed on an end of the tube side of the joint portion, wherein the joint portion and the sealing portion are disposed in an interior of the tube, a liquid packing compound for sealing between the tube and the joint, wherein the liquid packing compound fills at least an area between the sealing portion and the tube, wherein the sealing portion has a tapered surface, whose diameter increases toward the end of the tube. Thereby, when the joint portion is joined to the end of the tube, a clearance between the tube and the joint portion is entirely filled with the liquid packing compound.

Abstract: A coupling member for a power transmission apparatus, connected to a fiber reinforced plastic cylindrical drive shaft, is comprised of a substantially cylindrical fitting portion to be press fitted into the drive shaft. The fitting portion is comprised of a serration portion formed in the axial direction on an outer circumferential surface of the fitting portion. The edge of the fitting portion has an inclined guide surface. The tip area of the guide surface is a guide portion with a smaller outer diameter than an inner diameter of an end portion of the drive shaft. An area between the guide portion and the outer circumferential surface of the fitting portion is a cut away portion continuing from the serration portion. A tapering angle of the cut away portion is smaller than of the guide portion.

Abstract: A joint structure for a power transmitting member includes a fiber reinforced plastic and a joint. The joint includes a joint portion for joining to an end portion of the tube, and a sealing portion formed on an end of the tube side of the joint portion. The joint portion and the sealing portion are disposed in an interior of the tube. A liquid packing compound is provided for sealing the tube and the joint. The liquid packing compound fills at least an area between the sealing portion and the tube. The sealing portion has a tapered surface, whose diameter increases toward the end of the tube. Thereby, when the joint portion is joined to the end of the tube, a clearance between the tube and the joint portion is entirely filled with the liquid packing compound.

Abstract: A method of producing a plane commutator in which it is easy to integrally form carbon and segment, connecting strength between the carbon and mold resin is enhanced, and conductivity is enhanced. The plane carbon commutator comprises a plurality of metal segments fixed to a commutator body made of resin, engaging projections provided on a carbon which was previously burnt at a high temperature, the engaging projections being engaged with engaging holes provided in the segments functioning to allow insertion of the engaging projections into the engaging holes but prevent the engaging projections from being pulled out from the engaging holes are projected from peripheral edges of the engaging holes, and the cut-rising pieces are brought into contact under pressure with peripheral faces of the engaging projections. Peripheral faces of tip end side engaging projections are formed into coarse faces, and conductive paste is interposed between the segments and the carbon.

Abstract: A rod body (30) is formed of magnetostrictive material and includes one end portion (30a) fixed, and a piston (35) is fixed to the other end portion (30b) of the rod body (30). The piston (35) is slidably disposed within a cylinder (36) in which there is formed a pump chamber (37). A suction port (39) for sucking lubricating oil into the pump chamber (37) is formed in the cylinder (36), while a suction valve (40) for preventing the lubricating oil from flowing out from the suction port (39) is disposed in the suction port (39). In the cylinder (36), there is disposed a nozzle (20) which communicates with the pump chamber (37) and has a sectional area smaller than the lubricating oil passage sectional area of the suction valve (40). There is disposed a coil (43) outside the rod body (30) and, to the coil (43), there is connected a control device (6) for controlling the supply of a current to be supplied to the coil (43).

Abstract: A power train includes a driving shaft and a follower shaft connecting to the driving shaft by way of a first joint. The follower shaft is adapted to slide relative to the driving shaft in an axial direction. The follower shaft includes: a holder shaped substantially into a cylinder, and a tubular shaft section coupled with the holder in the axial direction. The first joint includes a member defining an outer diameter. The holder holds therein the member of the first joint. The tubular shaft section coupled with the holder in the axial direction causes an inner curl to a second joint coupling the holder and the tubular shaft section. The inner curl defines an inner diameter greater than the outer diameter of the member of the first joint.

Abstract: A method of supplying a lubricant to a roller bearing of a high-speed spindle includes pressuring the lubricant in a pump chamber and discharging the pressurized lubricant within the pump chamber from the nozzle. Also, the method includes bringing a fine quantity of lubricant discharged from the nozzle into direct contact with a lubricating surface of a rotary body of the roller bearing.

Abstract: A joint structure for a power transmitting member comprising a fiber reinforced plastic tube, a joint comprising a joint portion for joining to an end portion of the tube, and a sealing portion formed on an end of the tube side of the joint portion, wherein the joint portion and the sealing portion are disposed in an interior of the tube, a liquid packing compound for sealing between the tube and the joint, wherein the liquid packing compound fills at least an area between the sealing portion and the tube, wherein the sealing portion has a tapered surface, whose diameter increases toward the end of the tube. Thereby, when the joint portion is joined to the end of the tube, a clearance between the tube and the joint portion is entirely filled with the liquid packing compound.

Abstract: It is an object of the present invention to provide a plane commutator in which it is easy to integrally form carbon and segment, connecting strength between the carbon and mold resin is enhanced, and conductivity is enhanced. To achieve the object, there is provided a plane carbon commutator comprising a plurality of metal segments 5 fixed to a commutator body 3 made of resin, engaging projections 17P provided on a carbon 7 which was previously burnt at a high temperature, the engaging projections 17P being engaged with engaging holes 5H provided in the segments 5 and integrally formed as one unit, wherein tip ends of cut-rising pieces 5T functioning to allow insertion of the engaging projections 17P into the engaging holes 5H but prevent the engaging holes 5H from being pulled out from the engaging holes 5H are projected from peripheral edges of the engaging holes 5H, and the cut-rising pieces 5T are brought into contact under pressure with peripheral faces of the engaging projections 17P.

Abstract: A plane commutator in which it is easy to integrally form carbon and segment, connecting strength between the carbon and mold resin is enhanced, and conductivity is enhanced. The plane carbon commutator comprises a plurality of metal segments fixed to a commutator body made of resin, engaging projections provided on a carbon which was previously burnt at a high temperature, the engaging projections being engaged with engaging holes provided in the segments functioning to allow insertion of the engaging projections into the engaging holes but prevent the engaging projections from being pulled out from the engaging holes are projected from peripheral edges of the engaging holes, and the cut-rising pieces are brought into contact under pressure with peripheral faces of the engaging projections. Peripheral faces of tip end side engaging projections are formed into coarse faces, and conductive paste is interposed between the segments and the carbon.

Abstract: A rod body (30) is formed of magnetostrictive material and includes one end portion (30a) fixed, and a piston (35) is fixed to the other end portion (30b) of the rod body (30). The piston (35) is slidably disposed within a cylinder (36) in which there is formed a pump chamber (37). A suction port (39) for sucking lubricating oil into the pump chamber (37) is formed in the cylinder (36), while a suction valve (40) for preventing the lubricating oil from flowing out from the suction port (39) is disposed in the suction port (39). In the cylinder (36), there is disposed a nozzle (20) which communicates with the pump chamber (37) and has a sectional area smaller than the lubricating oil passage sectional area of the suction valve (40). There is disposed a coil (43) outside the rod body (30) and, to the coil (43), there is connected a control device (6) for controlling the supply of a current to be supplied to the coil (43).

Abstract: A coupling member for a power transmission apparatus, connected to a fiber reinforced plastic cylindrical drive shaft, is comprised of a substantially cylindrical fitting portion to be press fitted into the drive shaft. The fitting portion is comprised of a serration portion formed in the axial direction on an outer circumferential surface of the fitting portion. The edge of the fitting portion has an inclined guide surface. The tip area of the guide surface is a guide portion with a smaller outer diameter than an inner diameter of an end portion of the drive shaft. An area between the guide portion and the outer circumferential surface of the fitting portion is a cut away portion continuing from the serration portion. A tapering angle of the cut away portion is smaller than of the guide portion.