Toyoda Koki Kabushiki Kaisha

Jtekt Corporation

Toyota Jidosha Kogyo Kabushiki Kaisha

Toyoda Koki Kabushiki K.

Kenji Takahashi

Minoru Kawabata

Mikio Suzuki

Yutaka Mori

Toshihiko Shima

Susumu Honaga

Tomonari Yamakawa

Shusuke Inagi

Akio Nakamura

Masaya Segi

Satoshi Suto

Kentaro Hioki

Nobuaki Nonoyama

Toshimasa Miyata

The valve unit includes: a body having a charging passage; a supply-side joint that connects a supply pipe; and a check valve that is disposed in the gas passage, and that inhibits gas from being discharged from the gas tank to the outside of the body. The check valve includes a check valve seat, a check valve element that comes into contact with or moves away from the check valve seat, and a positioning member that fixes the position of the check valve seat in the charging passage. The body has a fitting hole which is communicated with the charging passage and in which the supply-side joint and the positioning member are fitted. The positioning member is fitted in a second fitting hole so as to fix the position of the check valve seat even when the supply-side joint has not been fitted in a first fitting hole.

Valve unit comprising a check valve device

A pressure switch includes a switch housing which has an accommodation bore extending inward from one end of the switch housing, and a slide bore extending between the accommodation bore and the other end of the switch housing. A piston is slidably disposed within the slide bore and is adapted to receive a pressure. A terminal serving as one electric contact is fixed to the accommodation bore via a holding ring made of an insulating material. A disk spring serving as the other electric contact is disposed between the piston and the terminal. The disk spring deforms due to a pressing force of the piston and comes in contact with the terminal. The pressure switch further comprises an annular elastic ring placed on the outer end of the holding ring. An end portion of the switch housing is deformed inward so as to elastically deform the elastic ring, thereby sealing the opening portion of the accommodation bore. The switch housing has a cylindrical portion which has a cylindrical outer shape and into which the holding ring is press-fit, a threaded portion for attachment of the switch housing, and a polygonal tightening portion which is formed between the cylindrical portion and the threaded portion and is used to tighten the switch housing.

Pressure switch

Method for producing a pressure plate used in a hydraulic pump by connecting first and second plate sections together include the steps of pressing metal powders to individually form the first and second plate sections and a ring member into predetermined configurations, placing the first plate section properly on the second plate section while the ring member is inserted in a bore formed in the first plate section, placing brazing metal along the upper side diameter of the bore, and heating the first and second plate sections and the ring member so as to connect the first and second plate sections and the ring member together by the brazing metal and simultaneously sintering the same.

Method for producing pressure plates used in hydraulic pumps

In a power steering device for a vehicle, a first spool valve member is slidably received in a valve housing and is supplied with a steering pressure generated in response to a manual steering torque. A second spool valve member is slidably received in the first spool valve member and is supplied with a control pressure depending upon a vehicle speed. Bypass means is formed on the first and second spool valve members to be actuated by the control pressure to communicate both cylinder chambers of a manual steering torque supplementing hydraulic actuator with each other. Relative displacement between the first and second spool valve members is caused by the steering pressure to act to close the bypass means.

Power steering device

A servo valve device in a power steering apparatus of a vehicle, which has a main valve member provided with two valve chambers and disposed to rotate in response to one of the action of a fluid pressure motor supplementing manual steering torque and a manual steering torque, and which has two flap valve members respectively located in the two valve chambers and disposed to rotate in response to the other of the action of the fluid pressure motor and the manual steering torque for controlling fluid under pressure for the fluid pressure motor. The two valve chambers are formed by fluid-tightly partitioning an axial slot formed within the main valve member at a plane containing the rotational axis thereof, and the two flap valve members are integrally formed with each other.

Servo valve device in power steering apparatus

A servo valve device in a power steering apparatus of an automobile includes a valve housing having a main valve rotatably mounted therein for rotating in response to the movement of a hydraulic power cylinder. A flap valve member is rotatably mounted in the main valve member for controlling the supply of fluid under pressure to a pair of distribution ports from a pair of injection ports. Each of the distribution ports separately communicates with a different one of the pair of injection ports through a pair of fluid passages formed in the main valve. One of the fluid passages is connected to one chamber of the hydraulic power cylinder through an annular recess formed on the peripheral portion of the main valve member, while the other of the fluid passages is connected to the other chamber of the hydraulic power cylinder through a passage formed within the flap valve.

Growing community of inventors

Kariya, Japan

Kenji Takahashi