Abstract: A differential device is provided with: an input case having an axially directed end face; a differential gear set with side gears allowing a differential motion therebetween; dog teeth toothed toward the end face on an output case; a clutch structure engageable with the dog teeth and so structured as to couple the output case or the second side gear with the input case when engaged; an axially movable clutch member including an internal end and an external end exposed to the exterior; an axially movable armature including a magnetic material and in contact with the external end; a solenoid supported away from the end face, the solenoid generating a magnetic flux to attract the armature and, via the clutch member, set the clutch structure in mesh with the dog teeth; and a spring biasing the clutch member in a contrary direction.

Abstract: A differential device is provided with: an input case having an axially directed end face; a differential gear set with side gears allowing a differential motion therebetween; dog teeth toothed toward the end face on an output case; a clutch structure engageable with the dog teeth and so structured as to couple the output case or the second side gear with the input case when engaged; an axially movable clutch member including an internal end and an external end exposed to the exterior; an axially movable armature including a magnetic material and in contact with the external end; a solenoid supported away from the end face, the solenoid generating a magnetic flux to attract the armature and, via the clutch member, set the clutch structure in mesh with the dog teeth; and a spring biasing the clutch member in a contrary direction.

Abstract: A case for a differential gear set includes: a rotatable carrier having a cylindrical fitting face and a radially projecting flange having an axially directed butting face; a cover having a brim section so projecting axially as to fit on an outer periphery of the flange and so dimensioned as to align an end face of the brim section with the butting face; a ring gear fitting on the fitting face and having a back face in contact with the butting face; and a weld metal uniting the carrier, the cover and the ring gear together, wherein the butting face of the carrier, the end face of the cover and the back face of the ring gear are so dimensioned as to keep a circular groove exposed outward and reaching an interface between the back face and the butting face and the weld metal fills the groove.

Abstract: A case for a differential gear set is comprised of: a rotatable carrier comprising a cylindrical fitting face and a radially projecting flange having an axially directed butting face; a cover comprising a brim section so projecting axially as to fit on an outer periphery of the flange and so dimensioned as to align an end face of the brim section with the butting face; a ring gear fitting on the fitting face and comprising a back face in contact with the butting face; and a weld metal joining the carrier, the cover and the ring gear together, wherein the butting face of the carrier, the end face of the cover and the back face of the ring gear are so dimensioned as to keep a circular groove exposed outward and reaching an interface between the back face and the butting face and the weld metal fills the groove.

Abstract: A differential gear has a simple structure, is able to produce a difference of differential limiting force between a driving operation of a vehicle in which the differential gear is installed and a coasting operation of the vehicle, secures the strength of a thrust bearing adopted for the differential gear, and provides a stabilized differential limiting force, in the driving operation, helical side gears receive thrusting forces acting away from each other, the differential case has inward support faces to axially support the helical side gears, the helical side gear has an annular inward counter face and an annular outward counter face on the inner circumferential side of opposite ends of a teeth area, and between the inward counter faces, there is a thrust bearing having a plurality of circumferentially arranged rollers.

Abstract: A differential gear has a simple structure, is able to produce a difference of differential limiting force between a driving operation of a vehicle in which the differential gear is installed and a coasting operation of the vehicle, secures the strength of a thrust bearing adopted for the differential gear, and provides a stabilized differential limiting force, in the driving operation, helical side gears receive thrusting forces acting away from each other, the differential case has inward support faces to axially support the helical side gears, the helical side gear has an annular inward counter face and an annular outward counter face on the inner circumferential side of opposite ends of a teeth area, and between the inward counter faces, there is a thrust bearing having a plurality of circumferentially arranged rollers.

Abstract: A partition structure of a power train device is provided with: a second differential coupled with an external first differential so as to receive a driving force input to the first differential; a case having a first end facing to the first differential, a second end opposed to the first end and a wall defining the case, the case rotatably housing the second differential and an oil for lubrication of the second differential; and a seal member disposed at the first end of the case and between the first differential and the second differential so as to prevent the oil in the case from mixing with an external fluid existing outside with respect to the case and the seal member.

Abstract: A differential locking section is provided between a pair of output members that respectively mesh with a pair of gears. Since, at least one of the output members is composed of a first output shaft member that meshes with the gear, and a second output shaft member rotatable with and axially movable relative to the first output shaft member, differential locking can be effected by axially moving only the second output shaft member, while the mesh between the first output shaft member and one of gears is leaving.

Abstract: A partition structure of a power train device is provided with: a second differential coupled with an external first differential so as to receive a driving force input to the first differential; a case having a first end facing to the first differential, a second end opposed to the first end and a wall defining the case, the case rotatably housing the second differential and an oil for lubrication of the second differential; and a seal member disposed at the first end of the case and between the first differential and the second differential so as to prevent the oil in the case from mixing with an external fluid existing outside with respect to the case and the seal member.

Abstract: A differential locking section is provided between a pair of output members that respectively mesh with a pair of gears. Since, at least one of the output members is composed of a first output shaft member that meshes with the gear, and a second output shaft member rotatable with and axially movable relative to the first output shaft member, differential locking can be effected by axially moving only the second output shaft member, while the mesh between the first output shaft member and one of gears is leaving.

Abstract: Compounds represented by the following general formula: ##STR1## wherein Rf and Rf' mean a perfluoroalkyl group having 1-20 carbon atoms or a (.omega.-H-perfluoroalkyl group represented by the formula H(CF.sub.2).sub.t in which t stands for an integer of 1-20, R.sup.2 denotes a hydrogen atom, a straight-chain or branched aliphatic hydrocarbon group having 1-20 carbon atoms, an alicyclic or aromatic hydrocarbon group having 5-10 carbon atoms, a perfluoroalkyl group having 1-20 carbon atoms, or .omega.-H-perfluoroalkyl group represented by the formula H(CF.sub.2).sub.u - in which u stands for an integer of 1-20, X and Y mean individually a single bond, --CO-- or a divalent hydrocarbon group having 1-6 carbon atoms, l stands for a number of 2-16, and m and n are individually a number of 1-6. The compounds are useful for preparing fluorine-modified silicone derivatives suitable for cosmetic compositions.

Abstract: The present invention is directed to cosmetic compositions containing a fluorine-modified silicon derivative the organopolysiloxane chain which is partly substituted by the siloxane chain of the following general formula (1), (2) or (3) ##STR1## wherein Rf and Rf' mean individually a perfluoroalkyl group having 1-20 carbon atoms or a .omega.-H-perfluoroalkyl group represented by the formula H(CF.sub.2).sub.t -- in which t stands for an integer of 1-20, R.sup.1 may be identical with or different from each other and means a straight-chain or branched aliphatic hydrocarbon group having 1-20 carbon atoms, or an alicyclic or aromatic hydrocarbon group having 5-10 carbon atoms, R.sup.2 denotes a hydrogen atom, a straight-chain or branched aliphatic hydrocarbon group having 1-20 carbon atoms, an alicyclic or aromatic hydrocarbon group having 5-10 carbon atoms, a perfluoroalkyl group having 1-20 carbon atoms, or a .omega.-H-perfluoroalkyl group represented by the formula H(CF.sub.2).sub.

Abstract: A differential apparatus includes a differential casing, a pair of helical side gears and a pairs of helical pinion gears. The helical pinion gears are accommodated in bores formed in the differential casing, respectively. When it is expected that a helix angle of tooth trace of the helical pinion gear would be decreased by the vehicle's driving, one of the helical pinion gears is formed in advance so that the tooth depths are gradually decreased from axial ends of the helical pinion gear toward the axial intermediate potion. Conversely, when it is expected that a helix angle of tooth trace of the pinion gear would be increased by the vehicle's driving, one of the helical pinion gears is formed in advance so that the tooth depths are gradually increased from the axial ends of the helical pinion gear toward the axial intermediate potion.

Abstract: This differential apparatus has a differential casing rotated by an engine, side gears on an output side arranged within the differential casing and spline-connected to output shafts, pinion gears for connecting the gears, storing holes for slidably and rotatably storing the gears, a thrust block for receiving thrust forces of the output shafts, washers, respectively opposed to the gears and movably arranged with respect to the thrust block in an axial direction, and a spring for pressing the washers, against the gears, and giving frictional torque to said gears. Accordingly, no thrust forces of the output shafts are inputted to the washer members and the spring and initial torque is released from influences of the thrust forces of the output shafts so that stable differential limiting characteristics can be obtained.

Abstract: The present invention is directed to a fluorine-modified silicone derivative the organopolysiloxane chain which is partly substituted by the siloxane chain of the following general formula (1), (2) or (3), a preparation process thereof, intermediates useful for the preparation thereof and cosmetic compositions containing this derivative. ##STR1## wherein Rf and Rf' mean individually a perfluoroalkyl group having 1-20 carbon atoms or a .omega.-H-perfluoroalkyl group represented by the formula H(CF.sub.2).sub.t -- in which t stands for an integer of 1-20, R.sup.1 may be identical with or different from each other and means a straight-chain or branched aliphatic hydrocarbon group having 1-20 carbon atoms, or an alicyclic or aromatic hydrocarbon group having 5-10 carbon atoms, R.sup.2 denotes a hydrogen atom, a straight-chain or branched aliphatic hydrocarbon group having 1-20 carbon atoms, an alicyclic or aromatic hydrocarbon group having 5-10 carbon atoms, a perfluoroalkyl group having 1-20 carbon atoms, or a .

Abstract: A fluorine-modified silicone derivative having an organopolysiloxane chain which is partly substituted by the siloxane chain of the following general formula (1), (2) or (3), ##STR1## where R.sup.1, R.sup.2, R.sup.3, R.sub.f, R.sub.f ', l, m, n and r are as described herein, a preparation process thereof, intermediates useful for the preparation thereof and cosmetic compositions containing this derivative.

Abstract: A fluorine-modified silicon compound having a polymerization degree of from 1 to 400 and containing at least one siloxane unit represented by formula (1): ##STR1## wherein R.sup.1 represents an aliphatic straight-chain or branched hydrocarbon group having 1 to 20 carbon atoms or an alicyclic hydrocarbon group having 5 to 10 carbon atoms or an aromatic hydrocarbon compound having 6 to 10 carbon atoms; and m represents 0 or an integer of from 1 to 10; a process for preparing the same; and a cosmetic containing the same are disclosed. The fluorine-modified silicone derivative exhibits high water- and oil-repellency to provide cosmetics which wear long and have a good feel on use.

Abstract: A polyol fatty acid ester having mixed acid groups is produced by reacting a partial ester of a polyol and a branched fatty acid with a a straight chain fatty acid or a lower alcohol ester thereof in the presence of a lipase. The obtained glyceride mixture contains a large amount of diglyceride having a branched, saturated fatty acid group and a straight chain, saturated fatty acid group.

Abstract: A translucent cosmetic emulsion comprising the following components (a) to (d),(a) a monoalkyl phosphate represented by formula (I): ##STR1## wherein R represents a .beta.-branched alkyl group having from 8 to 36 carbon atoms; and X represents an alkali metal or an organic basic group; or a dialkyl phosphate represented by formula (II): ##STR2## wherein R.sub.1 and R.sub.2 each represent a hydrocarbon group having from 10 tgo 24 carbon atoms; and x is as defined above;(b) at least one nonionic surfactant, wherein the surfactant has an HLB value of from 7 to 20, and wherein when two or more nonionic surfactants are present, the surfactants together have an HLB value of from 7 to 20;(c ) an oily matrix; and(d) water;is disclosed. This translucent cosmetic emulsion is highly safe and remains stable upon prolonged storage.

Abstract: A water-in-oil type emulsion cosmetic, which comprises a specific emulsifier mixture, an oily base containing a silicone oil and water and has a viscosity of 20,000 cps or below at 25.degree. C. is disclosed. The water-in-oil type emulsion cosmetic of the present invention imparts a good feel to the skin during use, is safe to use and has a high storage stability, which makes it widely applicable for use in, for example, milky lotions, body-care lotions and liquid-type foundations.