Abstract: A pressure container has a steel pipe and an end plate that is formed with a joint portion by allowing its tapered surface to touch a tapered surface of an opening end of the steel pipe so as to block the opening end. The steel pipe has a flange portion which can be cut at the opening end of the steel pipe, and the joint portion is allowed to touch the flange portion. The flange portion is pressed against the opening end along an axial direction so as to touch the end plate, and while the end plate is being pressed against the steel pipe along the axial direction, an electric current is applied so that welding is carried out.

Abstract: A damper mechanism for a lockup device 7 is a device for mechanically transmitting a torque in a torque converter 1. A coil spring 58 is arranged in first and second windows 61 and 62 overlapping with each other, and is compressed in accordance with the relative rotation of drive and driven members 52 and 53. A maximum torsion angle ? m is defined when the coil springs 58 are compressed to a maximum extent by relative rotation between the drive and driven members 52 and 53. Each of the first and second windows 61 and 62 has an outer periphery longer than an inner periphery. Each ends 61a and 62a on the circumferential ends of the first and second windows 61 and 62 form an angle ? with respect to a center line extending through a center O of the damper mechanism and a circumferential center C1 or C2 of the first or second window 61 or 62, and this angle ? is in a range between 0.05 and 0.60 times as large as the maximum torsion angle ? m.

Abstract: A method for producing a cerium oxide abrasive, characterized in that the method comprises firing a raw material of cerium carbonate having a fluorine content F (ppm by mass) falling within a range of 10 to 500 ppm by mass, at a firing temperature T (° C.) selected within a temperature range defined by the following formula: 730?14[ log(F)]?T?790?10[ log(F)].

Abstract: A damper disc assembly 42 is provided to reduce the number of components in the torque converter. The damper disc assembly 42 absorbs and dampens torsional vibration as well as transmits torque, and includes a driven member 53, a drive member 52, torsion springs 54, and a friction generation mechanism 71. The drive member 52 includes a pair of plate members 56 and 57 fixed to each other. Each of the plate members 56 and 57 is located on either axial side of the driven member 53 to be rotatable relative to the driven member 53. The torsion springs 54 connect the driven member 53 and the drive member 52 in the rotational direction. The friction generation mechanism 71 generates friction when the driven member 53 and the drive member 52 rotate relative to each other. An urging force that is an elastic force of at least one of the plate members 56 and 57 is applied to a friction surface of the friction generation mechanism 71.

Abstract: A pressure container has a steel pipe and an end plate that is formed with a joint portion by allowing its tapered surface to touch a tapered surface of an opening end of the steel pipe so as to block the opening end. The steel pipe has a flange portion which can be cut at the opening end of the steel pipe, and the joint portion is allowed to touch the flange portion. The flange portion is pressed against the opening end along an axial direction so as to touch the end plate, and while the end plate is being pressed against the steel pipe along the axial direction, an electric current is applied so that welding is carried out.

Abstract: A vehicular brake system component is used in a brake system of a vehicle. The brake system component includes a sealable bonded component having a metal member and an elastic rubber member bonded to each other and located so as to touch a brake fluid.

Abstract: A damper mechanism for a lockup device 7 is a device for mechanically transmitting a torque in a torque converter 1. A coil spring 58 is arranged in first and second windows 61 and 62 overlapping with each other, and is compressed in accordance with the relative rotation of drive and driven members 52 and 53. A maximum torsion angle ? m is defined when the coil springs 58 are compressed to a maximum extent by relative rotation between the drive and driven members 52 and 53. Each of the first and second windows 61 and 62 has an outer periphery longer than an inner periphery. Each ends 61a and 62a on the circumferential ends of the first and second windows 61 and 62 form an angle ? with respect to a center line extending through a center O of the damper mechanism and a circumferential center C1 or C2 of the first or second window 61 or 62, and this angle ? is in a range between 0.05 and 0.60 times as large as the maximum torsion angle ? m.

Abstract: In an accumulator comprising a pressure vessel, a bellows dividing the interior of the pressure vessel into a gas chamber filled with pressurized gas and a liquid chamber which communicates with a liquid pressure circuit via a liquid introduction port, a stay member attached to the inner surface of the pressure vessel inside the bellows and provided with a communication port for communicating the interior and exterior of the stay member with each other and adapted to be closed by a part of the bellows to define a fully contracted state of the bellows, and a safety valve provided in the stay member, typically in the form of a weakened portion of the stay member, for selectively communicating the exterior of the stay member with the interior of the stay member. Thus, because the safety valve is not provided in the pressure vessel itself, the safety valve of the present invention would not affect the sealing capability of the pressure vessel.

Abstract: Disclosed is an accumulator comprising a cylindrical shell including a cylindrical portion, a partitioning member for partitioning the interior of the shell into a hydraulic chamber and a gas chamber, and a port including a hydraulic fluid flow path for communicating the exterior of the shell and the hydraulic chamber. The variation of the pressure of a hydraulic fluid flowing into the hydraulic chamber is accommodated by expansion and compression of a gas in the gas chamber according to expansion and contraction of the partitioning member. The port is approximately airtightly inserted into the cylindrical portion of the shell, and is welded to an outer circumference of the cylindrical portion by means of welding.

Abstract: In an accumulator comprising a pressure vessel, a bellows dividing the interior of the pressure vessel into a gas chamber filled with pressurized gas and a liquid chamber which communicates with a liquid pressure circuit via a liquid introduction port, a stay member attached to the inner surface of the pressure vessel inside the bellows and provided with a communication port for communicating the interior and exterior of the stay member with each other and adapted to be closed by a part of the bellows to define a fully contracted state of the bellows, and a safety valve provided in the stay member, typically in the form of a weakened portion of the stay member, for selectively communicating the exterior of the stay member with the interior of the stay member. Thus, because the safety valve is not provided in the pressure vessel itself, the safety valve of the present invention would not affect the sealing capability of the pressure vessel.

Abstract: Disclosed is an accumulator comprising: a pressure vessel; an elastic bellows in which a compressed gas is sealed, an end of the bellows being fixed to an interior of the pressure vessel; a flow path having an opening communicating with the interior and an exterior of the pressure vessel; a valve connected to a movable end of the bellows to operatively close the opening according to elastic motion of the bellows; and a hydraulic chamber partitioned from a gas chamber formed in an interior of the bellows containing the compressed gas. The valve comprises an upper surface which can cover the opening, and plural circular protrusions which surround the entire circumference of the opening and can closely contact the circumference of the opening.

Abstract: A diagnosing apparatus for diagnosing an accumulator operable to store under pressure a pressurized fluid delivered from a high-pressure source and to supply the pressurized fluid to a fluid-operated actuator for operating the fluid-operated actuator, the apparatus including a pressure detecting device for detecting a pressure of the pressurized fluid in the accumulator while the accumulator is placed in a fluid-tightly sealed state in which the accumulator is isolated from both the high-pressure source and the fluid-operated actuator, and a diagnosing device operable to diagnose the accumulator on the basis of the pressure of the pressurized fluid detected by the pressure detecting device in the fluid-tightly sealed state of the accumulator.

Abstract: A diagnosing apparatus for diagnosing an accumulator operable to store under pressure a pressurized fluid delivered from a high-pressure source and to supply the pressurized fluid to a fluid-operated actuator for operating the fluid-operated actuator, the apparatus including a pressure detecting device for detecting a pressure of the pressurized fluid in the accumulator while the accumulator is placed in a fluid-tightly sealed state in which the accumulator is isolated from both the high-pressure source and the fluid-operated actuator, and a diagnosing device operable to diagnose the accumulator on the basis of the pressure of the pressurized fluid detected by the pressure detecting device in the fluid-tightly sealed state of the accumulator.

Abstract: Disclosed is an accumulator comprising a cylindrical shell including a cylindrical portion, a partitioning member for partitioning the interior of the shell into a hydraulic chamber and a gas chamber, and a port including a hydraulic fluid flow path for communicating the exterior of the shell and the hydraulic chamber. The variation of the pressure of a hydraulic fluid flowing into the hydraulic chamber is accommodated by expansion and compression of a gas in the gas chamber according to expansion and contraction of the partitioning member. The port is approximately airtightly inserted into the cylindrical portion of the shell, and is welded to an outer circumference of the cylindrical portion by means of welding.

Abstract: Disclosed is an accumulator comprising: a pressure vessel; an elastic bellows in which a compressed gas is sealed, an end of the bellows being fixed to an interior of the pressure vessel; a flow path having an opening communicating with the interior and an exterior of the pressure vessel; a valve connected to a movable end of the bellows to operatively close the opening according to elastic motion of the bellows; and a hydraulic chamber partitioned from a gas chamber formed in an interior of the bellows containing the compressed gas. The valve comprises an upper surface which can cover the opening, and plural circular protrusions which surround the entire circumference of the opening and can closely contact the circumference of the opening.

Abstract: Disclosed is an accumulator comprising: a pressure vessel; an elastic bellows in which a compressed gas is sealed, an end of the bellows being fixed to an interior of the pressure vessel; a flow path having an opening communicating with the interior and an exterior of the pressure vessel; a valve connected to a movable end of the bellows to operatively close the opening according to elastic motion of the bellows; and a hydraulic chamber partitioned from a gas chamber formed in an interior of the bellows containing the compressed gas. The valve comprises an upper surface which can cover the opening, and plural circular protrusions which surround the entire circumference of the opening and can closely contact the circumference of the opening.

Abstract: A clutch disk assembly includes an input rotary member 2, an output rotary member 3, damper mechanisms 4 and 5, a friction mechanism 13 and a friction suppressing mechanism. Damper mechanisms 4 and 5 include a plurality of elastic members 7 and 8 which are arranged between the input and output rotary members 2 and 3 and are circumferentially compressed when the members 2 and 3 rotate relatively to each other. The damper mechanisms 4 and 5 exhibit torsion characteristics in a first region and a second region of relative rotary displacement where the dampening rigidity within the second region is greater than in the first region. The friction mechanism 13 is adapted to generate frictional resistance (hysteresis torque) in the second region of the relative rotary displacement within the clutch disk assembly.

Abstract: An abrasive composition for polishing glass, containing a basic salt of magnesium. Also disclosed is a method for polishing glass with the abrasive composition.

Abstract: A clutch disk assembly 1 includes an output rotary member 3, an input rotary member 2, a first spring 7, a second spring 8 and a friction generating mechanism 13. The first spring 7 circumferentially and elastically couples the output and input rotary members 3 and 2 together, and is compressed in a first stage in which a torsion angle between them does not exceed a first torsion angle 1. The second spring 8 is compressed in a second stage in which the torsion angle between the output and input rotary members 3 and 2 exceeds the first torsion angle 1, and provides a rigidity in the second stage higher than a rigidity in the first stage. The friction generating mechanism 13 circumferentially and frictionally engages the input and output rotary members 2 and 3 with each other, and can generate slide in the first and second stages.

Abstract: A clutch cover assembly is used for urging a friction member connected to an output member against an input rotation member and for releasing urging on the input rotation member. The clutch cover assembly comprises a clutch cover, a pressure plate, an urging member, a support mechanism and a movement regulation mechanism. The clutch cover is fixed to the input rotation member. The pressure plate is located within the clutch cover and urges the friction member. The urging member urges the pressure plate toward the friction member. The support mechanism is movable toward the friction member and supports the urging member. The movement regulation mechanism moves the support member toward the friction member according to wear displacement of the friction member.