Linear-rotary motion conversion mechanism

5-9. (canceled)

An axial mechanism for converting between linear reciprocating motion and rotary motion about a substantially parallel axis, comprising

• a z-crank shaft mounted for rotation about a longitudinal axis of the z-crank shaft, the z-crank shaft including an output drive end and an angled crank pin,
• a wobble member rotationally mounted to the angled crank pin of the z-crank shaft, and
• one or more pistons each connected to the wobble member through a pivot joint unit comprising a number of bearings and which is fitted to and removable from the wobble member as an integral unit comprising said bearings and without disassembly of said unit or said bearings.

13-16. (canceled)

An axial mechanism for converting between linear reciprocating motion and rotary motion about a substantially parallel axis, comprising

• a z-crank shaft mounted for rotation about a longitudinal axis of the z-crank shaft, the z-crank shaft including an output drive end and an angled crank pin,
• a wobble member rotationally mounted to the angled crank pin of the z-crank shaft, one or more pistons with a connecting rod between each piston and a pivot joint to the wobble member for coupling linear reciprocating motion between the piston and the wobble member, and
• a torque restraint member coupled between the wobble member and a non-moving reference point via a resilient mount or bearing which allows for limited oscillatory movement of the torque restraint member about a longitudinal axis of the torque restraint member to the angled crank pin, and limited movement along said axis.

22-24. (canceled)

26-31. (canceled)