(under subclass 64) Apparatus wherein (1) the working member rotates about an axis simultaneously with the straight-line movement thereof, each movement being a proximate result of, or directly effecting, reaction between the member and the working fluid or (2) the apparatus includes a rotary working member distinct from and operative in conjunction with that member which moves in a straight line path.
(1) Note. Included under this definition is rotary movement (other than for mere adjustment or of support) extending through less than 360 deg. (e.g., oscillatory).
