Cushman Darby & Cushman, LLP
Rotary fluid compressor having an oldham mechanism
 A fluid compressor having a rotational force transmitting mechanism. The mechanism comprises an Oldam portion, an Oldam ring and a second cylinder gearing. The Oldam portion is integral with a piston. The Oldam ring has a first pair of key grooves and a second pair of key grooves. The key grooves of the first pair extend at right angles to those of the second pair. The second cylinder bearing is fitted in the cylinder and has two projections fitted in the key grooves of the second pair. The Oldam ring is made of silicon nitride ceramic. 
Kabushiki Kaisha Toshiba
F F F
F16D F04C F01C
inventional inventional inventional
Hiroyasu Takuya Takashi Yoshinori Takayoshi
Yoshizawa Hirayama Honjo Sone Fujiwara