Toyoda Koki Kabushiki Kaisha

Jtekt Corporation

Toyo Kogyo Co., Ltd.

Toyota Jidosha Kogyo Kabushiki Kaisha

Yamasei Kogyo Co., Ltd.

Yoshiyuki Takeuchi

Toshihiko Shima

Hiroaki Suzuki

Ryutaro Abe

Soichi Shirai

Nobuyuki Shirai

Tadayoshi Kamiya

Takao Yoneda

Mikio Suzuki

Kyosuke Haga

Keiichi Nakamura

Susumu Honaga

Akira Nakano

Minoru Enomoto

Akio Nakamura

Tomomi Nakayama

Yoshiyuki Toyama

Tomoya Noda

Mikio Nakajima

Shookichi Shiozawa

Shuji Takagi

Syuzi Takagi

Hirotune Suzuki

Mikio Asai

Michihiro Kitamura

Mutsuo Henmi

Kouichi Shibata

Akio Nakamurai

Thoshihiko Shima

A valve apparatus includes a body with a supply passage for gas and a solenoid valve housed in the body. The solenoid valve includes a tubular sleeve internally having a flow passage leading to the supply passage, and a valve element and a valve seat that open and close the flow passage. The solenoid valve includes a driving portion that opens and closes the valve element. A seal member is disposed between an outer wall of the sleeve and an inner wall of the body. A tip of the sleeve on a downstream side of the valve element is exposed from the body.

Valve apparatus

A high pressure valve for hydrogen gas includes a valve seat and a valve member, which is movable to selectively open and close the valve seat. One of the valve member and the valve seat is formed of austenitic stainless steel, and the other one of the valve member and the valve seat is formed of flexible synthetic resin or soft metal.

High pressure valve for hydrogen gas and decompression device for hydrogen gas

In order to obtain a solenoid valve device installed in a gas tank that is small in size and easy to attach to a gas tank, a valve body () including a flow passage (a) formed therein to communicate the inside and the outside of a gas tank () is inserted to the inside from the outside through a mouth hole () of the gas tank () and attached to the mouth hole (). A valve seat () is provided in the flow passage (a), and a movable valve element () attached to or detached from the valve seat () is provided in the valve body (). A solenoid unit () includes a movable core () engaged with the valve element () and a fixed core () facing the movable core () to attract the movable core () by the energization of a coil () and distract the movable core () by the non-energization of the coil (). The solenoid unit () is arranged inside a storage hole () formed at an end part of the valve body () inside the gas tank (). A cap member () is provided to cover the end part of the valve body () inside the gas tank (). An opening () formed in an end face of the cap member () communicates with the flow passage (a), and a flat plate-like filter member () is disposed in the opening ().

Solenoid valve device installed in gas tank

An excess flow valve includes: a valve that opens and closes a flow path; a solenoid that keeps the valve in an opened state; a pressure detector detecting the primary-side pressure of the valve; and a controller controlling current flow to the solenoid based on pressure detected by the pressure detector so that the valve is closed when the flow rate supplied to the valve is at or more than a predetermined amount. The excess flow valve can be used in a wide variety of applications and prevents a flow of fluid at or greater than a desired flow rate even if the primary-side supply pressure varies.

Excess flow valve

A stop valve for a gas tank is provided which achieves favorable sealing performance by inhibiting rotation of a sealing member attached to a valve element. A passage is formed inside a valve body, and a valve seat is provided in the passage. The valve element which is engaged and disengaged from the valve seat is slidably inserted to a sliding hole bored in the valve body. The annular sealing member is arranged in sliding contact with the outer peripheral surface of the valve element and the inner peripheral surface of the sliding hole. A screw hole connecting to the sliding hole and coaxial thereto is provided in the valve body. A rotating operation member having a male screw is rotatably screwed into the screw hole from the outside of the valve body. One end of the rotating operation member is made to abut the valve body.

Stop valve for gas tank

A power steering apparatus of the present invention which includes a pump, a power cylinder, a control valve, an orifice arranged in a supply passage leading an operating fluid discharged from the pump to the control valve, a flow control valve, and a switching valve. A spring chamber of the flow control valve is connected to the supply passage downstream of the orifice, and is responsive to the pressure difference across the orifice for regulating the flow rate of an operating fluid to the control valve to an almost constant flow rate. The switching valve is actuated in response to the differential pressure across the orifice for switching the communication of the spring chamber between the downstream of the orifice and the reservoir. When the differential pressure across the orifice is relatively low, the switching valve brings the spring chamber into communication with the reservoir. With this configuration, an excessively high pressure is not maintained in the pump, and an increase in the temperature of the operating fluid which brings about seizure of the pump can be prevented.

Power steering apparatus with a flow control unit

A pressurized fluid supply hose which conducts pressurized fluid discharged from a pump to a fluidically operated device is disclosed. A spiral tube formed by two spirally wound band members is fixed by caulking in one end of a steel pipe. The outer shape of the one end of the steel pipe includes a taper portion formed to slope gradually between a thin portion and an outer diameter portion. By effecting a caulking process with a caulking tool having a pressing portion extending in parallel to an outer surface of the steel pipe, the outer taper portion of the steel pipe is contracted to formed an inner taper portion at an internal surface thereof, and one end of the spiral tube is fixed to the inner taper portion. Because the spiral tube is gradually deformed along the inner taper portion of the steel pipe, it can avoided that a large clearance is formed between the two band members of the spiral tube.

Pressurized fluid hose

A vane pump includes a pump housing formed with a cylindrical inner space, intake ports and exhaust ports, a rotating shaft rotatably supported by the pump housing, a rotor received in the cylindrical inner space to be rotated by the rotating shaft, a cam ring disposed in the cylindrical inner space, a plurality of vanes held by the rotor to define plural pump chambers between the rotor and cam ring. Fluid sucked from the intake ports is pressurized and discharged to the exhaust ports. The vane pump is further provided with first and second pressure chambers and a throttle passage connecting the first and second pressure chambers. Pressurized fluid discharged from one of the exhaust ports is led to one of the two pressure chambers and pressurized fluid discharged form the other of the exhaust ports is led to the other of the pressure chambers while pressurized fluid is taken out from the second pressure chamber to be supplied to a fluid device.

Vane pump with pressure chambers at the outlet to reduce noise

A reservoir used in an automotive power steering system is provided with a first filter disposed within a reservoir body at a location between an inlet and an outlet thereof. The reservoir is further provided with a first guide member for forcing the oil flowed into through the inlet to flow toward the first filter by changing the flow direction of the oil and a second guide member for forcing the oil passed through the first filter to flow toward the outlet by changing the flow direction of the oil. The first guide member is provided with an opening, and a second filter whose mesh is finer than that of the first filter is attached to the opening so as to allow the oil to flow from the inlet to the inside space above the first filter through the second filter. On the other hand, the second guide member is formed with a second opening for allowing the oil passed through the first filter to flow toward the outlet through the second opening.

Reservoir

A power steering system which includes a fluid source that supplies pressure fluid of a constant flow rate, a fluid motor for supplementing manual steering torque, a servo-valve for distributing fluid to the fluid motor, and a reaction device for applying hydraulic reaction or feeling to a steering wheel. A magnetic pressure control valve is connected to the reaction device to control fluid pressure applied thereto in accordance with a vehicle operating condition, such a vehicle speed. A flow dividing valve serves to divide the pressure fluid of a constant flow rate in a predetermined ratio into first and second flows which are respectively directed to the servo-valve and reaction device. The predetermined ratio is varied such that the flow rate of the fluid supplied to the reaction device increases as the pressure of the fluid supplied to the fluid motor increases.

Power steering system with hydraulic reaction

A vane type hydraulic pump for use in a power steering apparatus comprising a pump housing receiving therein a non-rotatable cam ring and first and second non-rotatable but axially slidable side plates. A pump rotor rotatable integrally with a drive shaft is received in an internal cam bore of the cam ring and, when rotated, delivers pressurized fluid to a discharge port connected to the power steering apparatus. The first and second side plates define at a contact portion therebetween a radial low pressure cavity, which is fluidically communicated with an axial low pressure hole receiving working fluid from a pump reservoir and bypassed fluid from a flow volume control valve. A branch member is provided on one of the side plates to smoothly branch the fluid flow flowing in the low pressure hole in the axial direction into the flow flowing along the low pressure cavity in the radial direction.

Hydraulic pump for power steering

A grinding machine wherein a wheel support carrying a grinding wheel is moved along a straight path extending at an acute angle to an axis of rotation of a workpiece. For the subsequent simultaneous grindings of a cylindrical surface and a shoulder side surface perpendicular thereto of the workpiece, the position of a transverse table carrying the workpiece is adjusted in proportion to a designated finish diameter of the cylindrical surface. The position of a sizing device slidable in the axial direction of the workpiece is also adjusted in connection to the positional adjustment of the transverse table, so that a pair of feelers of the sizing device are engaged with the cylindrical surface at a position which is spaced by a designated distance from the shoulder side surface.

Growing community of inventors

Gamagori, Japan

Yoshiyuki Takeuchi