.~ With rotation imparting fluid impinging surface on piston part
DEFINITION
Classification: 92/173
(under subclass 172) Apparatus including a surface on the piston positioned to be contacted by the working fluid, said surface being so shaped that contact of the working fluid therewith effects either a rotary movement of said piston about its longitudinal axis or a rotary movement of the body of working fluid about an axis coinciding with the longitudinal axis of the piston.
SEE OR SEARCH THIS CLASS, SUBCLASS:
31+, for a means to cause rotation of a piston responsive to rectilinear movement of said piston in a cylinder.
