Automatic automobile carrier for mechanical garages

Claim 1

IN A SELF-PROPELLED CARRIER FOR THE AUTOMATIC PICK-UP AND DELIVERY OF AUTOMOBILES INTO AND OUT OF THE STALLS IN A MECHANICAL GARAGE HAVING A CARRIAGE FRAME, DRIVING AND ELECTRICAL CONTROL MEANS MOUNTED ON SAID FRAME FOR MOVING SAID FRAME AND INCLUDING A PAIR OF WHEEL-MOUNTED DRIVE SHAFTS JOINED TO SAID FRAME, HYDRAULIC MOTORS COUPLED IN PARALLEL AND CONNECTED TO SAID DRIVE SHAFTS, HYDRAULIC PUMP MEANS CONNECTED TO SAID MOTORS FOR DRIVING SAID CARRIER, AND AUTOMOBILE WHEEL GRIPPING MEANS CENTERED BETWEEN SAID DRIVE SHAFTS, THE IMPROVEMENT COMPRISING MEANS FOR OBTAINING A SUBSTANTIALLY CONSTANT DECELERATION OF A MOVING CARRIER INCLUDING A HYDRAULIC SUPPLY LINE AND A HYDRAULIC RETURN LINE CONNECTING SAID MOTORS TO SAID PUMP MEANS, A FIRST FLUID VOLUME CONTROL MOUNTED IN SAID RETURN LINE INDEPENDENT OF FLUID PRESSURE FROM SAID PUMP MEANS, A SECOND FLUID VOLUME CONTROL MOUNTED IN SAID SUPPLY LINE, A HYDRAULIC PISTTON CYLINDER JOINED TO SAID SDECOND FLUID VOLUME CONTROL FOR ACTIVATION THEREBY, AND CONNECTING MEANS BETWEEN SAID CYLINDER AND SAID FIRST VOLUME CONTROL MEANS FOR ACTUATING SAID FIRST VOLUME CONTROL MEANS IN RESPONSE TO SAID SECOND VOLUME CONTROL MEANS, AND A SINGLE ELECTRIC CABLE JOINED BETWEEN SAID DRIVING AND ELECTRICAL CONTROL MEANS AND A SOURCE OF ELECTRIC CURRENT FOR ENERGIZING SAID DRIVING AND ELECTRICAL CONTROL MEANS.