Vehicle accessory unit and power unit therefor

Claim 1

A VEHICLE ACCESSORY SYSTEM COMPRISING, IN COMBINATION, AN OPERATIVE MEMBER, MEANS FOR CONNECTING SAID OPERATIVE MEMBER TO SAID VEHICLE FOR VERTICAL MOVEMENT AND FOR ADDITIONAL MOVEMENT INDEPENDENT OF SAID VERTICAL MOVEMENT, AN INTEGRAL POWER UNIT INCLUDING A RAM CONNECTED TO SAID MEMBER, MEANS SUPPORTING SAID RAM FOR VERTICAL MOVEMENT TO MOVE SAID MEMBER VERTICALLY, MEANS IN SAID POWER UNIT DEFINING A RESERVOIR FOR HYDRAULIC FLUID, PUMP MEANS IN SAID POWER UNIT AND COMMUNICATING WITH SAID RESERVOIR, MEANS DEFINING A CHANNEL WITHIN SAID POWER UNIT EXTENDING BETWEEN SAID PUMP AND SAID RAM THROUGH WHICH HYDRAULIC FLUID IS DELIVERED TO SAID RAM TO APPLY HYDRAULIC PRESSURE TO AND RAISE SAID RAM, MEANS CONNECTED TO SAID OPERATIVE MEMBER AND EFFECTIVE WHEN ENERGIZED TO MOVE SAID OPERATIVE MEMBER INDEPENDENTLY OF SAID RAM AND IN ADDITION TO SAID VERTICAL MOVEMENT, MEANS DEFINING A HYDRAULIC FLUID TAKE-OFF IN SAID POWER UNIT AND IN COMMUNICATION WITH SAID CHANNEL, AND MEANS CONNECTING SAID HYDRAULIC FLUID TAKE-OFF TO SAID MEANS FOR MOVING SAID OPERATIVE MEMBER INDEPENDENTLY OF SAID RAM SO THAT SAID POWER UNIT CAN EFFECT BOTH MOVEMENTS OF SAID OPERATIVE MEMBER.