Advics Co., Ltd.

Aisin Seiki Kabushiki Kaisha

Mitsuharu Hayashi

Takashi Nagashima

Kenichi Suzuki

Masamoto Ando

Masashi Sawada

Yuichiro Sakakibara

Hirohisa Kuwana

Ken Sakakibara

Toshihito Suzuki

A reservoir tank for a vehicle brake system has a tank body including upper and lower shells joined together along mating surfaces. A float and a fluid level sensor are mounted in a fluid level detecting chamber defined in the tank body. The float is fitted on a shaft of the fluid level sensor. A partition plate is fitted in the lower shell to restrict a flow of hydraulic fluid into and out of the fluid level detecting chamber. The partition plate is disposed near the top end of the shaft of the fluid level sensor to restrict the distance by which the float can move vertically. A filter, the fluid level sensor and the partition plate are all set in the lower shell. The filter and the partition plate having their top ends pressed against the bottom ends of partitioning walls of the upper shell. Thus, the filter and the partition wall are held in position in the tank body between the upper and lower shells. No separate retainer for the float is necessary because the partition plate serves also as a float retainer.

Reservoir tank for vehicle brake system

A reservoir tank has an inlet/outlet port communicating with a master cylinder, and a hydraulic fluid supply port provided directly opposite the inlet/outlet port. A tubular portion is provided on the inner surface of the tank. The tubular portion has an internal passage communicating with the inlet/outlet port and having a top opening. A box-shaped member has its bottom plate fitted on the tubular member. The bottom plate is formed of a filter material. A deflector plate is supported on legs extending upwardly form the bottom plate of the box member so as to be disposed right over the top opening of the tubular portion. The deflector plate deflects the flow of hydraulic fluid such that it will not be directed toward the hydraulic fluid supply port, thereby preventing hydraulic fluid from being blown out through the hydraulic fluid supply port even if this port is open.

A reservoir tank for a vehicle brake system has a tank body including upper and lower shells joined together along mating surfaces. A float and a fluid level sensor are mounted in a fluid level detecting chamber defined in the tank body. The float is fitted on a shaft of the fluid level sensor. A partition plate is fitted in the lower shell to restrict a flow of hydraulic fluid into and out of the fluid level detecting chamber. The partition plate is disposed near the top end of the shaft of the fluid level sensor to restrict the distance by which the float can move vertically. A filter, the fluid level sensor and the partition plate are all set in the lower shell. The filter and the partition plate having their top ends pressed against the bottom ends of partitioning walls of the upper shell. Thus, the filter and the partition wall are held in position in the tank body between the upper and lower shells.

In a hydraulic joint structure for joining respective tubular joint portions of two members, opposed pressure-contact surfaces of the two members for preventing loosening form a downstream space on the downstream side of a seal member. A passage is formed on the pressure-contact surfaces in such a manner that when working fluid leaks from the upstream side of the seal member to the downstream space via a clearance between the seal member and the tubular joint portions, the passage permits the working fluid to flow from the downstream space to an external space in the state in which the pressure-contact surfaces are in pressure contact. The passage is formed in such a manner that the passage extends in a circumferential direction of the thread portions, and communicates at one end with the downstream space and at the other end with the external space.

Hydraulic joint structure

A reservoir tank includes a main portion and a storage chamber disposed in the main portion for storing operating fluid, with the storage chamber being surrounded by a side wall, a ceiling portion and a bottom portion. A float is disposed in the storage chamber and is adapted to move vertically corresponding to the height of the operating fluid level, and a reed switch is operatively associated with the float so as to operate in accordance with the height of the float. A partition member divides the storage chamber into an upper space and a lower space in which the operating fluid and the float are disposed.

Reservoir tank

A master cylinder reservoir for use in an automotive vehicle includes a main body, a reserving chamber formed in the main body for storing operating fluid, a pouring opening provided at one end of the upper portion of the main body to permit introduction of the operating fluid into the reserving chamber, and a blocking device provided in the main body for preventing a leakage of the operating fluid outside the main body via the pouring opening.

Growing community of inventors

Nishio, Japan

Mitsuharu Hayashi