Denso Corporation

Advics Co., Ltd.

Fumiyoshi Ariki

Hiroyuki Shinkai

Minekazu Sakai

Takashi Sato

Hideaki Shirai

Shin Sasaki

Kiyomasa Sugimoto

Yasunori Kawamoto

Hitoshi Mizutani

Akinori Nakayama

A sensor device includes a semiconductor substrate and multiple sensing portions that are placed on one side of the semiconductor substrate and convert a physical quantity into an electrical signal. The one side is parallel to a reference plane defined by an X-direction and a Y-direction perpendicular to each other. The semiconductor substrate has a center point that is both a geometric center and a center of mass. The semiconductor substrate is axisymmetric with respect to each of a first reference line passing through the center point and parallel to the X-direction and a second reference line passing through the center point and parallel to the Y-direction. Each of the sensing portions is axisymmetric with respect to each of the first reference line and the second reference line.

Sensor device

A pressure regulating reservoir is structured such that a major diameter portion of a shaft contacts a bottom surface of a valve seat, whereas a top surface of a piston does not contact an upper end surface of a wall forming a reservoir chamber in a housing. Therefore, a lift amount of a ball valve can be set using a portion above the major diameter portion of the shaft that contacts the bottom surface of the valve seat. That is, the lift amount can be set using only a dimension in the axial direction of a minor diameter portion of the shaft.

Pressure regulating reservoir and vehicular braking apparatus using it

A gear pump having an inner rotor and an outer rotor is covered by a cylindrical outer casing and side casings. The cylindrical outer casing has two outer circumferential edges which are welded over the entire circumference thereof to the outer edges of the side casings, respectively. The outer casing has two angularly spaced recesses in its inner periphery for receiving slide seals therein. Welding is started at a welding start point which is 90 degrees spaced from the middle point between two recesses. During welding, welding energies are applied to the welding start point and the middle point between two recesses. Those energies tend to deform the casing into oval shapes that are 90 degrees out of phase from each other. Thus, these energies cancel each other, thereby preventing the casing from being deformed.

Welding method and tubular member and gear pump made using the welding method

In a pump apparatus having a plurality of rotary pumps, an axis of a drive shaft is disposed perpendicularly to the gravity direction and the respective intake and discharge ports of the pumps extend in a direction opposite to the gravity direction. A housing, in which the pumps are contained, is provided with brake fluid passages connected to the intake and discharge ports, respectively. The respective brake fluid passages also extend in a direction opposite to the gravity direction. As a result, air entered into brake fluid may be easily purged through the intake and discharge ports and the brake fluid passages.

Vehicle brake apparatus with rotary pump

A pressure-adjusting reservoir which can reduce an unstable movement of a ball valve therein to release a pulse of brake fluid. The pressure-adjusting reservoir has a pressure-adjusting valve constructed so that a tip portion of a pin pushes up a ball valve to open a valve hole when brake fluid reserved in a reservoir chamber is less than a predetermined amount, and the tip portion of the pin is released from the ball valve to close the valve hole when the reservoir chamber is filled with the predetermined amount of brake fluid. The tip portion of the pin has a slant surface slanting with respect to a sliding direction of the pin. In this case, the ball valve contacts with at least two portions including the slant surface and one of a part of a valve seat and inner wall of a housing, and is supported at plural portions. Therefore, the unstable movement of the ball valve can be reduced.

Growing community of inventors

Komaki, Japan

Fumiyoshi Ariki