Mitsubishi Heavy Industries Limited

Mitsubishi Jukogyo Kabushiki Kaisha

Churyo Engineering Kabushiki Kaishi

Masashi Hirabayashi

Daisuke Tanaka

Hiroyasu Aruga

Toyotaka Hirao

Hiroyuki Sonobe

Makoto Fujitani

Katsuhiko Suzuki

Hiroshi Mizutani

Hisayoshi Takahashi

Hiroshi Machida

Sachio Onoda

Masami Kondo

Katsutoshi Ohta

Hideo Honda

Masahiro Tsubono

Shigehisa Katou

Masashi Maeno

Ken Shimizu

Naomi Kidokoro

In a driving unit for an electric motor driven bicycle, a motor (31) has an output shaft coaxial with a crank shaft (39) of a pedal. A planet roller reducer (40) has a sun roller shaft coincident with the output shaft. Through the planet roller reducer (40) and a two-stage reducing gear mechanism (50) for further reducing the output of the planet roller reducer (40), a torque of the motor (31) is transmitted to a driving chain sprocket (4). Provided that the torque of the motor (31) exceeds a predetermined pedaling torque level, the torque is transmitted to the driving chain sprocket (4).

Driving unit for an electric motor driven bicycle

A rotary compressor includes a top clearance volume formed between a cylinder chamber and at least one delivery valve. Another top clearance volume, in communication with the cylinder chamber, produces a reverse flow of compressed fluid which generates pulsations adapted to offset a high frequency component of pulsations generated in the cylinder chamber by compressed fluid reversely flowing from the first top clearance volume to the cylinder chamber. Thereby the high frequency component of pulsations generated in the cylinder chamber is eliminated, and a low-noise rotary compressor is provided.

Rotary compressor with clearance volumes to offset pulsations

Growing community of inventors

Nagoya, Japan

Masashi Hirabayashi