Apparatus for attaching a hitch to a vehicle

1. An apparatus for attaching a hitch to a vehicle, the apparatus comprising:

a) a pin having a longitudinal axis rotatably mountable to the hitch and having a handle for rotating the pin;

b) a receptacle formed in the vehicle for receiving the pin;

c) a locking site defined by a channel extending about the longitudinal axis of the pin, the channel having a generally circular cross-section along a section substantially parallel to the longitudinal axis of the pin;

d) a bypass portion intersecting the channel and extending longitudinally from the channel to an end of the pin; and

e) a protrusion on the receptacle,

whereby the bypass portion permits insertion of the pin into the receptacle to align the locking site and the protrusion such that rotation of the pin lockably engages the protrusion in the locking site to attach the hitch to the vehicle.

2. The apparatus of claim 1 wherein the pin is formed with the channel and with the bypass portion and the receptacle is formed with the protrusion.

3. The apparatus of claim 2 wherein the channel fully encircles the pin.

4. The apparatus of claim 2 wherein the bypass portion is generally flat.

5. The apparatus of claim 2 wherein the bypass portion forms a slot longitudinally extending in the pin.

6. The apparatus of claim 2 wherein the receptacle comprises a wall defining an opening having a longitudinal axis wherein the protrusion projects from the wall.

7. The apparatus of claim 6 wherein the protrusion forms a flange having an edge extending substantially perpendicularly to the longitudinal axis of the opening.

8. The apparatus of claim 6 wherein the protrusion forms a flange having an edge portion extending substantially parallel to the wall.

9. The apparatus of claim 6 wherein the protrusion projects radially from the wall.

10. The apparatus of claim 1 wherein the protrusion and the channel are complementarily dimensioned.

11. The apparatus of claim 1 wherein the pin is captively attached to a flange of the hitch.

12. The apparatus of claim 1 wherein the handle is integrally connected to the pin and projects away from the longitudinal axis of the pin.

13. The apparatus of claim 2 further comprising a frame attachable to the vehicle and having the receptacle attached thereto.

14. The apparatus of claim 13 wherein the frame comprises a tubular frame member having an aperture through a wall of the tubular frame member dimensioned to permit at least the bypass portion of the pin to pass through the aperture.

15. The apparatus of claim 14 wherein the receptacle comprises a lock block dimensioned to be received within the tubular frame member.

16. The apparatus of claim 15 wherein the lock block includes an opening having a longitudinal axis such that the opening and the aperture of the tubular frame member are alignable when the lock block is received within the tubular frame member.

17. The apparatus of claim 16 wherein the protrusion forms a flange having an edge extending substantially perpendicularly to the longitudinal axis of the opening, the channel fully encircles the pin, the bypass portion is generally flat, the protrusion and the channel are complementarily dimensioned, the pin is captively attached to a flange of the hitch, the handle is integrally connected to the pin and projects away from the longitudinal axis of the pin, and wherein the vehicle includes a vehicle aperture through the vehicle and the frame comprises an under-vehicle member operable to receive a fastener passing through the vehicle aperture to attach the frame to the vehicle.

18. An apparatus for attaching a hitch to a vehicle, the apparatus comprising:

a) insertion means rotatably mountable to the hitch and having a handle for rotating the insertion means;

b) receiving means for receiving the insertion means, the receiving means being formed in the vehicle;

c) locking means defined by a channel formed in the insertion means, the channel extending about a longitudinal axis of the insertion means and having a generally circular cross-section along a section substantially parallel to the longitudinal axis of the insertion means;

d) bypass means intersecting the channel and extending longitudinally from the channel to an end of the insertion means; and

e) protruding means for lockably engaging the locking means, the protruding means being on the receiving means,

whereby the bypass means permits insertion of the insertion means into the receiving means to align the locking means and the protruding means such that rotation of the insertion means lockably engages the protruding means in the locking means to attach the hitch to the vehicle.

19. The apparatus of claim 18 further comprising means for attaching the receiving means to the vehicle.