초록

A multipositionable apparatus for mounting on a receiver assembly carried by a vehicle includes a support frame, a platform carried on the support frame and a linkage for displaceably mounting the platform relative to the frame and positively holding the platform in at least two different positions.

대표청구항 ▼

The invention claimed is: 1. A multipositionable apparatus mountable to a receiver assembly comprising: a support frame mountable to a receiver assembly; a platform; a linkage having at least one link arm and at least one support arm, wherein said link arm and said support arm are pivotally connect

The invention claimed is: 1. A multipositionable apparatus mountable to a receiver assembly comprising: a support frame mountable to a receiver assembly; a platform; a linkage having at least one link arm and at least one support arm, wherein said link arm and said support arm are pivotally connected to said platform and pivotally connected to said support frame to create at least one parallelogram linkage such that said platform translates between a first position and a second position relative to said support frame; at least two notches located on an exterior edge of said support arm; and a latch bar biased into a latching position within one of said notches, wherein said latch bar is displaceable from said notches to selectively position said platform relative to said support frame. 2. The apparatus of claim 1, wherein said linkage includes a pair of link arms and a pair of support arms. 3. The apparatus of claim 2, wherein said platform includes a pair of mounting brackets, each one of said pair of mounting brackets being pivotally engaged by said linkage. 4. The apparatus of claim 2, wherein each one of said link arms is pivotally mounted at a first point to said support frame and at a second point to said platform. 5. The apparatus of claim 4, wherein each one of said support arm is pivotally mounted at a third point to said support frame and at a fourth point to said platform. 6. The apparatus of claim 5, wherein said platform includes a pair of mounting brackets, said link arm and support arm being pivotally secured to one of said pair of brackets. 7. The apparatus of claim 6, wherein said exterior edge of said support arms is an arcuate guide surface and includes the notches thereon, the notches interrupting said guide surface. 8. The apparatus of claim 6, further including a spring for biasing said latch bar from a release position into a latching position, said spring having a first end engaging said latch bar and a second end engaging one of said mounting brackets. 9. The apparatus of claim 2, wherein each one of said link arms includes a pair of opposed sidewalls and a connecting wall forming a channel. 10. The apparatus of claim 9, wherein said support frame includes first and second mounting tubes for securing to said receiver assembly. 11. The apparatus of claim 10, wherein one of said first and second mounting tubes has a distal end received in said channel. 12. The apparatus of claim 1, further comprising a third notch located on said exterior edge of said support arm wherein said third notch defines a third selectively set position for said platform relative to said support frame. 13. A multipositionable apparatus mountable to a receiver assembly, the apparatus comprising: a support frame mountable to a receiver assembly; a platform pivotally movable relative to said support frame; a pair of link arms and a pair of support arms forming a pair of parallelogram linkages wherein,each of said link arms and said support arms pivotally connects said platform to said support frame, at least one of said support arms having at least two notches formed along an exterior edge of said support arm a latch bar biased into a latching position within one of said notches; and a spring biasing said latch bar into one of said notches, wherein said latch bar is displaceable from each notch to selectively set said platform in a predetermined position relative to said support frame. 14. The apparatus of claim 13, further comprising a third notch along said support arm wherein said third notch defines a third selectively set position for said platform relative to said support frame. 15. The apparatus of claim 13, wherein said platform includes a pair of mounting brackets, wherein the latch bar is received in a latch bar slot provided in each of said mounting brackets. 16. The apparatus of claim 15, wherein said support arm includes an arcuate surface and includes the notches thereon, the notches interrupting said guide surface. 17. A multipositionable apparatus mountable to a receiver assembly comprising: a support frame mountable to a receiver assembly; a platform; a linkage pivotally connected to said platform and pivotally connected to said support frame, wherein said platform translates between a first position and a second position relative to said support frame; wherein said linkage includes a pair of cooperating linkage sets, each linkage set including a link arm and a support arm; at least two notches along said linkage wherein each notch defines a selectively set position for said platform relative to said support frame; a latch bar selectively engagable with one of said notches to move said platform with respect to said support frame; and a torsion spring biasing said latch bar into a latching position within one of said notches. 18. The apparatus of claim 17, wherein said platform includes a pair of mounting brackets pivotally engaged by at least one of said pair of linkage sets. 19. The apparatus of claim 18 further comprising a latch bar receiving slot provided in at least one of said pair of mounting brackets, said latch bar being displaceable along said latch bar receiving slot.