Abstract The invention relates to a rotary piston engine of the type having an internally toothed ring and an externally toothed wheel which is orbitably and rotatably movable relative to the ring. The motor has a disk shaped valve which is driven by the externally toothed wheel through a universal joint shaft. In order that the shaft only applies torque to the valve, to the exclusion of any axially directed force, the valve has a splined bore and is journalled on a cylindrically shaped abutment which is fixed relative to the casing. The shaft has a splined head which engages the splined bore of the valve to effect rotation of the valve but the shaft head is in axial thrust engagement with the abutment so that no axial forces are transmitted to the valve. The valve and casing parts are appropriately and uniquely disigned with cooperating annular recesses so that axially directed hydraulic forces on the valve are also minimized. The overall result is that there is no mechanical axial loading of the valve and little or no hydraulic axial loading of the valve.
A rotary piston motor comprising a casing, an internally toothed ring in fixed relation to said casing, an externally toothed wheel cooperable with said ring and being orbitably and rotatably movable relative to the axis of said ring, a disk shaped valve mounted for rotation relative to the axis of said ring, said wheel and said valve each having a centrally disposed splined bore, a universal joint shaft having splined heads at opposite ends thereof in meshing engagement respectively with said wheel and valve splined bores, an abutment member in abutting engagement with an internal wall of said casing and extending part way into said splined bore of said valve for axial thrust engagement with the adjacent one of said splined heads, said abutment member having a cylindrically shaped surface in engagement with said valve bore for supporting said valve for rotation about the axis of said ring.
Claim 2
Dependent Claim
148 words
A rotary piston motor comprising a casing, an internally toothed ring in fixed relation to said casing, an externally toothed wheel cooperable with said ring and being orbitably and rotatably movable relative to the axis of said ring, a disk shaped valve mounted for rotation relative to the axis of said ring, said wheel and said valve each having a centrally disposed splined bore, a universal joint shaft having splined heads at opposite ends thereof in meshing engagement respectively with said wheel and valve splined bores, an abutment member in abutting engagement with an internal wall of said casing and extending part way into said splined bore of said valve for axial thrust engagement with the adjacent one of said splined heads, said abutment member having a cylindrically shaped surface in engagement with said valve bore for supporting said valve for rotation about the axis of said ring.