Abstract: A seat adjusting device for adjusting the seat position in the forward and backward directions by means of an externally provided motor. The device comprises an upper rail and a lower rail, both of them being slidably fitted together, a lead male screw rotatably supported within the space between the upper and lower rails, a female screw block which is also provided within that space and threadedly engaged with the lead male screw, and a drive mechanism disposed at the end of the upper lower rails in a manner exposed externally away from such space between those two rails. The seat adjusting device is, therefore, capable of small-sized formation and of being assembled with much ease without failure.

Abstract: A headrest for an automotive seat which comprises a head contact portion, a stretchable rear portion which includes an elastic webbing, and an air bag disposed within those two portions, all of them being fixed upon the top of seat back of the seat. The expansion or shrivelling of the air bag, by using an air pump, causes the headrest to raise for turning upright the head contact portion, or permits the air bag to be compressed by the contracting force of the webbing, thereby lowering the headrest.

Abstract: A reduction gear unit which comprises a housing, an input shaft rotatably supported in the housing, an eccentric cam member integrally fixed on the input shaft, an idler gear rotatably provided around the eccentric cam member, and a drive plate member provided integrally with an output shaft member, the drive plate member being rotatably supported in a coaxial relation with the input shaft. The idler gear is formed with a first and second external teeth in such a manner that the first external teeth are partly meshed with an internally toothed portion formed in the housing, and the second external teeth are partly meshed with an internally toothed portion formed in the drive plate member. Thus, an input rotation force is reduced in a tow-fold way and transmitted in a coaxial manner.

Abstract: A method of manufacturing a trim cover assembly for a vehicle seat, in which a decorative strip preformed in a predetermined shape and a substrate are pressed and heated together by upper and lower dies of a high frequency wave welding apparatus, while a high frequency wave is applied thereto. The upper die has a working surface larger than the decorative strip and formed with a fine crimp and fine irregularity. Thus, the decorative strip is welded integrally to the substrate on the same level, to thereby produce a greatly advantageous and aesthetic trim cover assembly.

Abstract: A headrest device for use with a seat in a vehicle such as an automobile is disclosed.

Abstract: A seat for a vehicle in which a seat back is separated into a plurality of portions in the vertical direction and a reclinable angle of each of the plurality of separated portions can be varied is disclosed, which includes a reclining device provided in connection with the lowest portion of the separated portions and a cushion of the seat for adjusting a reclinable angle of the lowest portion relative to the cushion of the seat, a plurality of angle adjusting devices each provided in connection with adjacent ones of the separated portions for adjusting an angle of an upper portion of the adjacent ones relative to a lower portion thereof, a fine adjusting member provided in connection with each of the plurality of angle adjusting devices for finely adjusting the angle of the upper portion, a member for coupling each of the plurality of angle adjusting devices to the reclining device to thereby operate the plurality of angle adjusting devices in response to each operation of the reclining device, whereby the se

Abstract: An automatic control system for a vehicle such as a fork lift truck automates the transportation, loading and unloading operations of the vehicle in a work area. Leader cables disposed in the work area are supplied with instruction signals of respectively different frequencies from terminal units in response to commands from a central control device. Any cable or a combination of two cables forms a ehicle guideway along which the travel of the vehicle is controlled by instruction signal pickup coils on the vehicle and along which loading and unloading stations for the vehicle are located. Loading and unloading are effected without using the leader cables, the necessary instruction signals then being received from the central control device by the vehicle from a coil disposed at the loading and unloading station.

Abstract: A joint housing has mounted therein a bearing supporting a ball portion of a ball stud, extending outwardly therefrom, so as to allow angular displacement thereof. The ball portion comprises a greater diameter portion of the ball stud, such as a sphere-segmental head on its extreme end, and a sphere-segmental shell coaxially surrounding the ball stud with a spacing therebetween. The shell has an inturned annular rim at one end thereof in an opposed relation to an annular shoulder provided by the head of the ball stud. A one-piece elastomeric bushing is injection molded in place between the ball stud and the shell. Part of the bushing further fills the annular gap between the shoulder of the ball stud and the inturned rim of the shell. Preferably prestressed, this part of the bushing serves to prevent the development of looseness with the progress of wear and further to minimize the axial displacement of the ball stud relative to the joint housing under load.

Abstract: At the time of blow molding of a frame made of synthetic resin in the shape of a hollow plate, a molding process of the frame of a seat for vehicles which comprises a reinforcement plate in the shape of with leg portions substantially equal to the thickness of the frame plate is mounted within a molding die, thereby forming said reinforcement plate so as to be embedded within said frame. Furthermore, the upper and lower plates of the frame may be connected to each other by means of the leg portions of said reinforcement plate in the shape of so that a frame with a closed construction may be formed.

Abstract: A vehicle seat is disclosed in which the movable arm members of its reclining mechanism are mounted to reinforcing members provided inside a back frame of a pan-type structure. Bolts for fixing the movable arm members are not projected outside the back frame.

Abstract: A ball-and-socket joint is protected in sealed state by a boot firmly secured at its outer end to the ball stud of the ball and at its inner end to the joint assembly by a clamping ring made of an elastic material in the form of a coil wound spirally with rectangular-section winding turns thereof lying adjacently side-by-side in the plane of the clamping ring. The spirally-coiled construction, in contrast to a helically-coiled construction, of the clamping ring permits it to be expanded greatly at the time of its fitting in the boot groove for assembly with little permanent deformation, whereby a great clamping force is obtainable.

Abstract: A vehicle seat is disclosed which includes a pan-type frame, a pad formed of a foam material, and a top layer adapted to cover the surface of said pad and also to fix said pad to said frame, while the end of said top layer is secured to the frame simultaneously with the formation of said pad. Accordingly, the conventional fixing step of fixing the top layer end to the frame by means of hogged rings or the like is not necessary, which results in a simplified and positive fixation of the top layer end. In other words, the following conventional steps can be eliminated: forming a frame in a pan structure; causing a foam material to foam within a metal mold having a predetermined configuration to form a pad in order to obtain a structure corresponding to that of the associated seat; and placing a top layer over the pad to be secured to the frame. With the invention, the top layer can be integrally secured to the frame by means of a foam material for forming a pad.

Abstract: A seat for use in vehicles such as automobiles, airplanes or the like is disclosed in which each of panel-like frames is formed with integral, closed hollow chambers and expandable/contractible hollow chambers by means of blow molding so as to correspond to required projected portions and elasticity holding portions provided on the surface of the seat.

Abstract: An easy-to-assemble compressor having a pair of parallel, double-headed pistons reciprocably mounted in respective cylinder chambers in a compressor housing. The pistons are mounted on a crankshaft via Scotch-yoke-type sliders slidably engaged in the respective pistons for reciprocating movement in a direction normal to the piston axis. The sliders convert the rotation of the crankshaft into linear reciprocation of the pistons. The dimensions of these sliders are determined in relation to the other parts of the compressor so that, during the assemblage of the compressor, the sliders may be mounted in position by being passed over the opposite end portions of the crankshaft following the mounting of the pistons and crankshaft within the housing.

Abstract: A boot seal mounted on a pivotal ball joint comprises a boss portion, a waist portion disposed in the outer periphery of the boss portion and a skirt portion disposed in the outer periphery of the waist portion. The boss portion has an upper surface brought into intimate contact with a lower end surface of a joint member mounted on a shank of the ball joint, and the skirt portion has an internal wall brought into intimate contact with an upper outer periphery of a socket housing in the ball joint. The boss portion is provided at its lower surface with a flare portion protruded downward and outward. The flare portion has, while being elastically flexed, a lower edge placed in touch with an upper end surface of the socket housing. This elasticity of the flare portion provides a close contact between the lower edge of the flare portion and the upper end surface of the socket housing and a close contact between the upper surface of the boss portion and the lower end surface of the joint member.

Abstract: The ball joint for the suspension system of automobiles, in which as a load-supporting seat, a multi-layer material provided with the synthetic resin layer having self-lubricating ability and abrasion resistance is used on the surface of the back metal, while as an opposite seat to a ball stud, synthetic resin having self-lubricating ability and wear resistance is used, and constituted so as to keep securely load support applied on the ball head by both seats.

Abstract: A ball joint comprises a circular cylindrical housing with at least one opening, a bearing member contained in the housing, a ball stud with its ball head pivotally supported by the bearing member, and a closing plate press-fitted in the opening so as to close the opening and to generate the contact pressure between the bearing member and the ball head.

Abstract: Disclosed is an inverted cup-shaped cover of deformable material to be fitted over an open socket housing end of a pivotal ball joint assembly. The cover has a pair of opposite end openings, one of which is considerably smaller in diameter than the other and receives therethrough in sealed relationship the shank of a ball stud protruding from the housing through an open end thereof. The cover has a gently curved longitudinal sectional configuration and is flared toward its other end opening at which it is fitted over the open end of the housing. A ring is embedded in the flared portion of the cover and has an inner circumferential edge exposed toward the interior of the cover. This inner edge is sharp-angled and has a diameter slightly smaller than the maximum diameter of the housing at the open end thereof. This ring is formed of resilient material, for example, spring steel.

Abstract: Such a ground excavating apparatus that conducts excavation of a soft stratum by means of a bucket and employs an impact crusher for the excavation of such a hard stratum as a rock bed or the like is disclosed.Introduced in the present application is a ground excavator of such a category that comprises a housing, a bucket boom properly set in place in the said housing in a manner of being capable of traveling forward and rearward, a bucket properly fitted in place on the front end section of the said bucket boom in a manner of being capable of inclining, and an impact crushing mechanism well capable of traveling forward and rearward by virtue of a hydraulic jack housed in the said bucket boom, and employs the said bucket and the said impact crushing mechanism in an alternate manner to best suit the nature of the ground to be excavated.

Abstract: Such a ground excavating apparatus that conducts excavation of a soft stratum by means of a bucket and employs an impact crusher for the excavation of such a hard stratum as a rock bed or the like is disclosed.Introduced in the present application is a ground excavator of such a category that comprises a housing, a bucket boom properly set in place in the said housing in a manner of being capable of traveling forward and rearward, a bucket properly fitted in place on the front end section of the said bucket boom in a manner of being capable of inclining, and an impact crushing mechanism well capable of traveling forward and rearward by virtue of a hydraulic jack housed in the said bucket boom, and employs the said bucket and the said impact crushing mechanism in an alternate manner to best suit the nature of the ground to be excavated.