Denso Corporation

Advics Co., Ltd.

Nippon Soken, Inc.

Toshiya Hayashi

Hisatoshi Kojima

Masahiro Asano

Naoki Hakamada

Takahiro Yamaguchi

Kazunori Uchiyama

Takashi Satou

Junichi Maeda

Hitoshi Mizutani

Yoshitake Hisada

Takuya Fukitsuke

Shigeki Torii

Katsumi Nagasaka

Akihiro Yada

Shinya Mitani

Kazuki Kataoka

Toru Nakanoboh

A rotating pumping apparatus is provided which may be employed in an automotive brake system. The rotating pumping apparatus includes a sealing member and a pressure member. The sealing member is disposed around a pump drive shaft. The pressure member includes a plate spring, a first rotation stopper, and a second rotation stopper. The first rotation stopper serves to stop the pressure member from rotating following rotation of the pump drive shaft. The second rotation stopper engages the seal ring to stop the sealing member from rotating following the rotation of the pump drive shaft. The plate spring works to elastically press the sealing member against a stopper wall of a pump casing to stop the sealing member from moving in an axial direction of the pump drive shaft.

Rotating pumping apparatus with seal mechanism

The curvature of a circular arc constituted by a side of a suction groove is made larger than that of a circular arc constituted by a side of a discharge groove. Thus, when the suction groove and the discharge groove are viewed in the axial direction of a drive shaft, the distance between the suction groove and the discharge groove in the radial direction of a rotary portion is short in a region intersecting with a line W perpendicular to a centerline, and increases in accordance with a decrease in distance from containment portions. It is therefore possible to ensure a sufficient distance between the discharge and suction grooves and enhance a total fluid pressure generated therebetween, and the contact surface pressure that is necessitated by a second side plate to obtain a press-back force when being in contact with an outer rotor and an inner rotor is reduced.

Rotary pump for braking device

A highly accurate, long-life grindstone for shaping a gear and a method of fabricating the grindstone, without depending on the accuracy of form of a base metal and without using a special grinding machine or a special lapping machine, are disclosed. A super-abrasive layer () of a predetermined thickness is fixedly attached on the outer periphery of a body portion () of the base metal () formed in a cylinder solid. The super-abrasive layer () is metal-bonded, and has the outer periphery thereof formed with a toothed portion () in the shape of the teeth of an external gear by electric discharge machining.

Gear-shaping grindstone and method of fabricating the same

A gear grinding machine and a gear grinding method, in which a gear-shaped grinding stone is caused to engage a gear-like workpiece and one of the gear-shaped grinding stone and the gear-like workpiece is reciprocated relatively to the other in axial direction thereby to grind the tooth flanks of the workpiece, are disclosed. The rotational resistance is applied by a brake unit to the rotationally driven side. The grinding resistance and the rotational resistance interfering with the relative reciprocal motion are detected by torque sensors and input to a control unit, the average value of each of the signals is compared with a reference value by an arithmetic unit and, in the case where there is a difference between the average value and the reference value, the rotational resistance is changed by activating the brake unit. Thus, a high machining accuracy can be maintained even when the sharpness of the grinding stone is reduced.

Gear grinding machine and gear grinding method

Growing community of inventors

Yokkaichi, Japan

Toshiya Hayashi