Patent ID: 9677401
Date: 2017-06-13
CPC Classifications: F01C,F02B,F16F,F16H,Y02T

Claim:
1. A radial piston rotary device with compact gear drive mechanism, comprising: a base; a casing mounted to the base, the casing having an inner chamber; an endcap detachably mounted to an axial end of the casing to cover the casing; a rotary piston assembly rotatably mounted inside the chamber, the radial piston assembly having a pair of rotary first radial pistons and a pair of rotary second radial pistons, relative rotations of the first radial pistons and the second radial pistons forming and defining variable volume sub-chambers between adjacent radial pistons, each pair of first radial pistons and second radial pistons rotating at out-of-phase cyclically varying velocities with respect to each other during operation; the rotary piston assembly including: a gearbox coupled to the casing, the gearbox having an inner chamber; an endcap detachably mounted to an axial end of the gearbox to cover the inner chamber; a gear assembly mounted inside the gearbox and coupled to the radial piston assembly, the gear assembly controlling the relative angular velocities of the first radial pistons and the second radial pistons to maintain an asynchronous, out-of-phase angular velocity relationship; the gear assembly including: a crank assembly coupling the rotary piston assembly to the gear assembly, the crank assembly transferring rotations of the first radial pistons and the second radial pistons to the gear assembly; and a flywheel assembly coupled to the gear assembly inside the inner chamber, the flywheel assembly having an elongate drive shaft axially extending out of the endcap of the gearbox to be coupled to at least one driven component, the gear assembly converting the out-of-phase angular velocities of the pairs of first radial pistons and second radial pistons into a uniform synchronous powered rotation of the drive shaft, the flywheel assembly including: