Hydraulic motor/pump
AssigneeHydrostatic Design Technology Pty Ltd
InventorGarth Davey
Life of this patent
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Abstract
A hydraulic machine which can exchange hydraulic fluid pressure with rotational motion of an input/output means, having a radial arrangement of a plurality of hydraulic piston and cylinder assemblies about a crankshaft, the hydraulic cylinder and piston assemblies being longitudinally spaced along the crankshaft; and a means for varying eccentricity of the crankshaft whereby reciprocal motion of the pistons within the respective hydraulic cylinders is consequential to rotational motion of the crankshaft about the longitudinal axis of the crankshaft.
Claims16
A hydraulic machine which can exchange hydraulic fluid pressure with rotational motion of an output means, the hydraulic machine having a radial arrangement of a plurality of piston and cylinder assemblies about at least one crankshaft coupled to the output means, the cylinder and piston assemblies being longitudinally spaced along the crankshaft;
- and means for varying the eccentricity of the crankshaft.
The hydraulic machine according to any one of the preceding claims including at least one lay shaft having, for each of the main bearings, a pinion gear to engage the teeth on the respective main bearing, whereby the torque applied to each of the main bearings is transferred through the at least one lay shaft rather than being transferred to the crankshaft.
The hydraulic machine according to any one of the preceding claims wherein the hydraulic cylinder and piston assemblies are supported by the housing such that the hydraulic piston cylinder assemblies can oscillate as the respective crankshaft rotates.
The hydraulic machine according to any one of the preceding claims wherein the hydraulic cylinder and piston assemblies are attached to the crankshaft with the same angle therebetween.
The hydraulic machine according to any one of the preceding claims wherein there are five hydraulic cylinder and piston assemblies disposed at 72° intervals about the crankshaft.
Dependencies are inferred from the claim text.