Hydrostatic power transfer system with isolating accumulator

A hydrostatic power transfer system for transferring power from a rotating power input shaft to a rotating output shaft, comprising:

• fluid pump means driven by a power input shaft and including means for supplying pressurized fluid to a pump outlet means,
• pressure accumulator means disposed downstream of the pump means and having respective accumulator inlet means for accepting pressurized fluid from the pump outlet means and accumulator outlet means for discharging fluid under pressure from the accumulator means, said accumulator means including two chambers and pressure transmissive means separating said two chambers, the pressurized fluid from said fluid pump means being supplied to one of the two chambers and the other chamber including spring cushion means for acting against said pressurized fluid in said one chamber via said pressure transmissive means for insulating the system against vibration transmission through the accumulator means and
• fluid motor means downstream of the pressure accumulator means and driven by fluid from the accumulator outlet means whereby said pressure accumulator means is interposed in series between said fluid pump means and the fluid motor means so that it substantially eliminates transmission of vibrations from the fluid pump means to the fluid motor means, said fluid motor means being drivingly connectable to a rotating output shaft.