A fluid motor and a fluid pump

(canceled)

A fluid pump for a fluid pressure system, comprising:

• a drive member rotatable about an axis by a pedaling action and providing an annular, wave-like surface extending at least partially radially to the axis,
• at least two piston assemblies each comprising a piston means, wherein the pistons means project towards the wave-like surface, wherein the at least two piston assemblies and the wave-like surface are arranged to cooperate so that rotation of the drive member about the axis drives sequential reciprocating motion of the piston means at least by a pushing action by the wave-like surface on said piston means.

(canceled)

A hub assembly comprising a fluid motor for a fluid pressure system, the fluid motor comprising:

• at least two piston assemblies each comprising a piston means, the at least two piston assemblies being operable to cause sequential reciprocating movement of the pistons means;
• a drive member rotatable about an axis and providing an annular, wave-like surface extending at least partially radially to the axis, towards which the piston means project, wherein the pistons means are arranged to drive rotation of the drive member about the axis at least by a pushing action on said wave-like surface.