Height adjustable dolly

Claim 1

A HORIZONTALLY MOVABLE AND VERTICALLY ADJUSTABLE NON-ELEVATING DOLLY SUPPORT FOR A PORTION OF AN AUTOMOBILE FRAME, FOR USE WHEN AN AUTOMOBILE BODY IS BEING REPAIRED, WHICH COMPRISES A RIGID, HORIZONTALLY-FIXED PLAFORM WIDER THAN THE AUTOMOBILE FRAME AND ON WHICH THE FRAME MAY BE RESTED, UPWARDLY EXTENDING PROJECTIONS ON THE TOP OF THE PLATFORM SPACED ABOUT THE PERIPHERY THEREOF FOR GUIDING AND POSITIONING OF THE FRAME AND FOR PREVENTING SLIDING MOVEMENT OF THE FRAME ON THE PLATFORM, A VERTICAL SUPPORTING MEMBER EXTENDING DOWNWARDLY FROM THE CENTER OF THE PLATFORM AND RIGIDLY JOINED THERETO, SAID VERTICAL MEMBER HAVING A ROW OF SURFACE DEPRESSIONS ALONG ITS LENGTH, A VERTICAL TUBULAR ENCLOSURE SUBSTANTIALLY COAXIAL WITH AND ENCLOSING THE VERTICAL SUPPORTING MEMBER AND IN WHICH IT CAN BE MOVED VERTICALLY, ADJUSTABLE LOCKING MEANS ON THE SIDE OF THE TUBULAR ENCLOSURE FOR NORMALLY ENGAGING A SURFACE DEPRESSION OF THE VERTICAL MEMBER AND HOLDING IT IN FIXED RELATIONSHIP WITH RESPECT TO SAID ENCLOSURE, CAPABLE OF BEING WITHDRAWN FROM SAID ENGAGEMENT TO ALLOW VERTICAL ADJUSTMENT OF THE SUPPORT, FOUR LEGS CONNECTED AT THEIR TOPS TO THE VERTICAL TUBE ENCLOSURE AND DIVERGING THEREFROM AT THEIR LOWER ENDS, THE LOWER ENDS OF SAID LEGS AND OF SAID TUBE BEING AFFIXED TO A COMMON HORIZONTAL BASE WHICH HOLDS THE LEGS APART AND THE TUBULAR ENCLOSURE IN A CENTRAL LOCATION THEREBETWEEN, FOUR SWIVEL WHEELS, EACH AFFIXED TO THE UNDERSIDE OF SAID BASE AT THE POINT AT WHICH EACH OF SAID LEGS IS ATTACHED THERETO, AND FASTENING MEANS CONNECTING SAID LEGS, SWIVEL WHEELS AND BASE, THE LEGS AND TUBE BEING OF SUCH PROPORTIONS AND SIZES THAT THE TUBE IS HELD ABOVE A HORIZONTAL SURFACE UPON WHICH THE WHEELS MAY BE RESTED, THE WHEELS BEING APART A GREATER DISTANCE THAN THE TUBE HEIGHT AND THE ADJUSTABLE SUPPORT BEING STABLE IN USE IN BOTH UPPERMOST AND LOWERMOST POSITIONS.