Flip-down ball mount cover assembly

A flip-down ball-mount cover assembly adapted to function in combination with a ball-mount receiver having a front edge that is rigidly attached to a vehicle structure and a rear perimeter edge having an opening into which is inserted a ball mount, said assembly comprising:

• a) a receiver cover dimensioned to encompass the opening on the ball mount receiver, said cover having a first edge, a second edge an outer surface, an inner surface and a center tab extending outward from the first edge,
• b) an assembly attachment collar dimensioned to fit around the rear perimeter edge of the ball-mount receiver, wherein said collar includes an open lower section which terminates with a left-hinge mounting tab having a left bolt bore and a pair of inward protruding left-hinge alignment pins, and a right-hinge mounting tab having a right bolt bore and a pair of inward protruding right-hinge alignment pins,
• c) a detent hinge comprising:
• (1) a stationary center section integrally attached to the inner surface of the center tab on said receiver cover, said center section having a bolt bore substantially centered therethrough, a left surface wherefrom protrudes a pair of aligned, left male detents, a right surface wherefrom protrudes a pair of aligned, right male detente,
• (2) a circular left resilient spacer having a flat inner surface, a flat outer surface, a centered bolt bore and a pair of pin bores dimensioned and aligned to be inserted into the pair of left-hinge alignment pins on the left-hinge mounting tab, wherein when inserted the ends of the left-hinge alignment pins protrude outward from the flat inner surface of said left resilient spacer,
• (3) a circular, left rigid spacer having an inner side, an outer side, an outer perimeter and a centered bolt bore, with the outer side having a pair of pin cavities which are dimensioned and aligned to receive the ends of the left alignment pins protruding from the inner surface Of said left resilient spacer, and with the inner side of said left rigid spacer having a 360° channel located between the spacer's outer perimeter and the bolt bore, with the channel having a set of four equally spaced female detents dimensioned and aligned to engage the pair of male detents protruding from the left surface of said stationary center section,
• (4) a circular, right resilient spacer having a flat inner surface, a flat outer surface, a centered bolt bore and a pair of pin bores dimensioned and aligned to be inserted into the pair of right-hinge alignment pins on the right-hinge mounting tab, wherein when inserted the ends of the right-hinge alignment Pins protrude outward from the flat inner surface of said right resilient spacer, and
• (5) a circular, right rigid spacer having an inner side, an outer side, an outer perimeter and a centered bolt bore, with the outer side having a pair of pin cavities which are dimensioned and aligned to receive the ends of the right-hinge alignment pins protruding from the inner surface of said right resilient spacer and with the inner side of said right rigid spacer having a 360° channel located between the spacer's outer perimeter and the bolt bore, with the channel having a set of four equally spaced female detents dimensioned and aligned to engage the pair of right male detents protruding from the right surface of said stationary center section, wherein to secure said detent hinge to said assembly attachment collar, a bolt is inserted into the left centered bolt bore on said collar and sequentially into the bolt bores on said left resilient spacer, said left rigid spacer, said right rigid spacer, said right resilient spacer and into the right bolt bore on said collar where a nut secures the bolt, wherein when said assembly attachment collar is attached to the ball-mount receiver, the receiver cover can be rotated from a fully opened horizontal or vertical position to a fully closed vertical position, wherein when in the Open position a ball mount can be normally inserted into the opening on the ball-mount receiver.