Patent ID: 6702038
Filing Date: 2004-03-09
Classification: B25F,F03B,Y02E,Y10S

Abstract:
A hydraulic motor comprising:a chamber having wall structure presenting a fluid inlet, an internal surface, a shaft passage hole, and at least one fluid outlet hole; a rolling rotor body located within said chamber between said fluid inlet and said shaft passage hole and having a outer surface of a rotational shape configured for rolling movement within the chamber; and an elongated shaft having a proximate end secured to said rotor body, said shaft including a stop mounted thereon and positioned within the chamber and configured for inhibiting axial movement of the shaft through the shaft passage hole, said shaft extending through said shaft passage hole and presenting a remote end located outside of said chamber, there being sufficient clearance between said shaft and said shaft passage hole to permit precessional movement of said shaft proximate end during said rolling movement of said rotor body.