Abstract: A wheel for a vehicle includes an additional air chamber member (10) having: a main body (13) which is fitted between a first vertical wall surface (16a) and a second vertical wall surface (16b); a first edge portion (14a) which extends from the main body (13) toward the first vertical wall surface (16a); a second edge portion (14b) which extends from the main body (13) toward the second vertical wall surface (16b); and a protruding portion (26) which protrudes from the first edge portion (14a) in the radial direction (Z) of the wheel so as to be fixedly engaged with the first vertical wall surface (16a).

Abstract: A wheel for a vehicle includes an additional air chamber member (10) having: a main body (13) which is fitted between a first vertical wall surface (16a) and a second vertical wall surface (16b); a first edge portion (14a) which extends from the main body (13) toward the first vertical wall surface (16a); a second edge portion (14b) which extends from the main body (13) toward the second vertical wall surface (16b); and a protruding portion (26) which protrudes from the first edge portion (14a) in the radial direction (Z) of the wheel so as to be fixedly engaged with the first vertical wall surface (16a).

Abstract: A choke coil has small difference of wire wound resistances between coils to obtain sufficient unbalance attenuation amount, superior in workability in winding and reduced leakage inductance and line capacity. The choke coil includes first and second coils divided into first and second segments wound on a single spool disposing intermediate insulations layers between respectively adjacent coil segments. The coil segments of the first and second coils are wound alternately. The first coil segment of the first coil and the second coil segment of the second coil being wound in a first winding number and the second coil segment of the second coil and the first coil segment of the second coil being wound in a second winding number. The second winding number being greater than the first winding number for reducing difference of winding resistance between the first and second coils less than or equal to 4%.

Abstract: A choke coil has small difference of wire wound resistances between coils to obtain sufficient unbalance attenuation amount, superior in workability in winding and reduced leakage inductance and line capacity. The choke coil includes first and second coils divided into first and second segments wound on a single spool disposing intermediate insulations layers between respectively adjacent coil segments. The coil segments of the first and second coils are wound alternately. The first coil segment of the first coil and the second coil segment of the second coil being wound in a first winding number and the second coil segment of the second coil and the first coil segment of the second coil being wound in a second winding number. The second winding number being greater than the first winding number for reducing difference of winding resistance between the first and second coils less than or equal to 4%.

Abstract: A hydraulic pump including a pressure chamber, a drain passage communicable with the pressure chamber, a delivery port, a discharge path fluidly connecting the pressure chamber with the delivery port, and an orifice disposed in the discharge path. A first flow control valve is provided for variably controlling fluid communication between the pressure chamber and the drain passage in response to a difference between fluid pressures upstream and downstream of the orifice. A second flow control valve is disposed within the discharge path, which is operative to variably control an opening area of the orifice in response to energy of fluid passing through the discharge path. The second flow control valve includes a moveable spool exposed to a fluid pressure within the pressure chamber, a spring biasing the spool in such one direction as to increase the opening area of the orifice, and a spring retainer cooperating with the spool to define a spring chamber accommodating the spring.

Abstract: A hydraulic pump unit is encased between a pump body and a pump cover. A bearing hole passes through the pump body and is formed in the pump body. A drive shaft and a bearing bush are inserted into the bearing hole. The drive shaft drives the hydraulic pump unit and the bearing bush supports the drive shaft. At an end portion of the bearing hole, a seal chamber is formed. The seal chamber encases a seal member. An oil groove is formed inside the bearing hole. The oil groove connects the hydraulic pump unit side with the seal chamber and carries hydraulic oil for lubrication. The oil groove is formed in such a manner that a sectional area in the seal chamber side is greater than a sectional area in the hydraulic pump unit side. The bearing bush comprises a plurality of bush pieces arranged at a predetermined interval in an axial direction of the bearing hole.

Abstract: A hydraulic pump includes a pump body having a bearing hole and formed with a seal chamber at an end of the bearing hole and an oil groove therein, the oil groove ensuring hydraulic communication between the pump unit and the seal chamber, a pump cover attached to the pump body to define a concavity for accommodating a pump unit, and a drive shaft arranged through the bearing hole of the pump body. A bearing bush, which is arranged through the bearing hole of the pump body to support the drive shaft, includes bush lugs disposed in the axial direction of the bearing hole of the pump body. Two of the bush lugs disposed at both ends of the bearing bush have seams located circumferentially distant from each other.

Abstract: A pump comprising a pump body having a control valve for controlling working fluid flow from the pump body to an actuator through a joint. The joint is connected mechanically to the pump body through a washer made of a material different from that of the pump body. The washer has a side surface held in contact with the pump body at a junction. The pump also includes an annular seal member provided to keep the junction from exposure to the environment. In an embodiment of the invention, the seal member is placed in an annular groove formed in the outer peripheral surface of the pump body. The seal member may have a side surface in fluid-sealing contact with the surface of the washer so as to keep the junction between the pump body and the washer from exposure to the environment.

Abstract: A pump comprising a pump body having a control valve for controlling working fluid flow from the pump body to an actuator through a joint. The joint is connected mechanically to the pump body through a washer made of a material different from that of the pump body. The washer has a side surface held in contact with the pump body at a junction. The pump also includes an annular seal member provided to keep the junction from exposure to the environment. In an embodiment of the present invention (FIG. 7), an annular member is provided between the pump body and the washer, with the annular member being made of an insulating material to prevent electrical conduction between the pump body and the washer.

Abstract: A pump comprising a pump body having a control valve for controlling working fluid flow from the pump body to an actuator through a joint. The joint is connected mechanically to the pump body through a washer made of a material different from that of the pump body. The washer has a side surface held in contact with the pump body at a galvanic junction. The pump also includes an annular seal member provided to keep the junction from exposure to the environment.

Abstract: An optical pickup having an optical disk (22); a laser diode (11); an objective lens for forming a beam spot on the optical disk; an optical element for guiding a beam from the laser diode to the objective lens; a photodetector for converting a reflected beam from the optical disk into an information signal and an error signal; an optical holder to which at least the objective lens is secured; a first circuit board (17) to which at least the laser diode and the photodetector are attached; an optical base to which the first circuit board (17), is secured; at least the laser diode, the optical element and the photodetector being sealed by the optical holder and the optical base so as to form an optical unit; a stationary member; a second circuit board (28) secured to the stationary member; an elastic support member (21) for elastically supporting the optical unit, which is electrically connected to the first and second circuit boards; at least one permanent magnet (23) secured to the optical unit; a first drive