Patent ID: 7275753
Filing Date: 2007-10-02
Classification: B60P

Abstract:
1. A towing dolly cradle assembly comprising two towing dolly assemblies, each said dolly assembly having a horizontal main tube, each said main tube having a left end and a right end, a left pivot mounting assembly attached to said left end, a right pivot mounting assembly attached to said right end, each said main tube having two axle cradle assemblies spaced apart and attached along one longitudinal side of each said main tube between respective said left ends and said right ends, said dolly assemblies spaced apart parallel and facing opposite one another with said axle cradle assemblies facing one another, and two dolly axle assemblies spaced parallel apart and opposite one another, and each said axle assembly having a central assembly, each said central assembly comprising a fixed length tube having two ends and having attached to each said end an axle end attachment tab, said axle assemblies interposed perpendicularly between said dolly assemblies and having respective said axle end attachment tabs removably attached to respective said axle cradle assemblies of respective said dolly assemblies, wherein each said left pivot mounting assembly comprising a left camlock assembly, said left camlock assembly having a camlock engaging pin, a left camlock weldment attached to one longitudinal, vertical side of said main tube proximate said left end, said left camlock weldment having a left camlock weldment pivot pin bore spaced from and parallel to a left camlock mounting bore, said left camlock assembly mounted to said left camlock weldment above and transversely across said main tube with said camlock engaging pin coaxial to said left camlock mounting bore and selectively moveable in, through, and outward beyond said left camlock mounting bore, a left pivot weldment, said left pivot weldment spaced parallel and across said main tube from said left camlock weldment and attached to the opposite longitudinal side of said main tube, and said left pivot weldment having a left pivot weldment pivot pin bore coaxial to said left camlock weldment pivot pin bore, a left pivot pin having two extending ends, said left pivot pin extending coaxially through said left camlock weldment pivot pin bore and extending transversely and perpendicularly across the longitudinal axis of said main tube and extending coaxially through said left pivot weldment pivot pin bore, said left pivot pin rotatably retained within said left camlock weldment pivot pin bore and said left pivot weldment pivot pin bore, a left pivot lock arm attached perpendicularly to a first extending end of said left pivot pin adjacent to said left camlock weldment, a left pivot arm attached perpendicularly to a second extending end of said left pivot pin adjacent to said left pivot weldment, said left pivot arm having a left spindle mounting hole spaced from and parallel to said left pivot pin, a wheel spindle attached at one end perpendicularly to said left pivot lock arm and spaced from and parallel to said left pivot pin at a distance sufficient to allow said left spindle to swing about the left pivot pin in an arc beyond said right end and beneath said main tube, and said wheel spindle mounted to said left pivot arm in and through said left spindle mounting hole and said wheel spindle having a wheel spindle stub axle portion extending outwardly and perpendicularly beyond said left pivot arm and away from said main tube and parallel to said left pivot pin, and said left pivot lock arm having a left raised position receiving hole transverse through said left pivot lock arm spaced from and parallel to said left pivot pin and located through said left pivot arm in a position that selectively and coaxially aligns with said camlock engaging pin to selectively engage said left raised position receiving hole when said left wheel spindle is located below said main tube and approximately 18 degrees over center towards the longitudinal midpoint of the underside of said main tube, said raised position receiving hole sized to selectively and coaxially receive said camlock engaging pin of said left camlock assembly, a left dolly pivot lever anchor attached to said wheel spindle and located between said left pivot lock arm and said left pivot arm, and wherein each said right pivot mounting assembly comprising a right camlock assembly, said right camlock assembly having a camlock engaging pin, a right camlock weldment attached to said same longitudinal, vertical side of said main tube as attached to said left camlock weldment, and said right camlock weldment attached proximate said right end, said right camlock weldment having a right camlock weldment pivot pin bore spaced from and parallel to a right camlock mounting bore, said right camlock assembly mounted to said right camlock weldment above and transversely across said main tube with said camlock engaging pin coaxial to said right camlock mounting bore and selectively moveable in, through, and outward beyond said right camlock mounting bore, a right pivot weldment, said right pivot weldment spaced parallel and across said main tube from said right camlock weldment and attached to the opposite longitudinal side of said main tube, and said right pivot weldment having a right pivot weldment pivot pin bore coaxial to said right camlock weldment pivot pin bore, a right pivot pin having two extending ends, said right pivot pin extending coaxially through said right camlock weldment pivot pin bore and extending transversely and perpendicularly across the longitudinal axis of said main tube and extending coaxially through said right pivot weldment pivot pin bore, said right pivot pin rotatably retained within said right camlock weldment pivot pin bore and said right pivot weldment pivot pin bore, a right pivot lock arm attached perpendicularly to a first extending end of said right pivot pin adjacent to said right camlock weldment, a right pivot arm attached perpendicularly to a second extending end of said right pivot pin adjacent to said right pivot weldment, said right pivot arm having a right spindle mounting hole spaced from and parallel to said right pivot pin, a wheel spindle attached at one end perpendicularly to said right pivot lock arm and spaced from and parallel to said right pivot pin at a distance sufficient to allow said right spindle to swing about the right pivot pin in an arc beyond said right end and beneath said main tube, and said wheel spindle mounted to said right pivot arm in and through said right spindle mounting hole and said wheel spindle having a wheel spindle stub axle portion extending outwardly and perpendicularly beyond said right pivot arm and away from said main tube and parallel to said right pivot pin, and said right pivot lock arm having a right raised position receiving hole transverse through said right pivot lock arm spaced from and parallel to said right pivot pin and located through said right pivot arm in a position that selectively and coaxially aligns with said camlock engaging pin to selectively engage said right raised position receiving hole when said right wheel spindle is located below said main tube and approximately 18 degrees over center towards the longitudinal midpoint of the underside of said main tube, said raised position receiving hole sized to selectively and coaxially receive said camlock engaging pin of said right camlock assembly, a right dolly pivot lever anchor attached to said wheel spindle and located between said right pivot lock arm and said right pivot arm, and wherein each said towing dolly assembly further comprising two wheel assemblies with one said wheel assembly mounted to and rotatably retained on each said spindle stub axle portion.