B - Operations – Transporting – 60 – P
Patent
B - Operations, Transporting
60
P
B60P 1/43 (2006.01) A61G 3/06 (2006.01) B65G 69/28 (2006.01)
Patent
CA 2077065
ABSTRACT OF THE DISCLOSURE An elongated ramp is provided for longitudinal extension and retraction relative to a predetermined margin of a support structure therefor. The ramp includes a longitudinally short base end section and a considerably longer outer end section and the support and ramp include coacting guide structures for sup- porting and guiding the ramp during extension and retraction thereof, the outer end section of the ramp being automatically disengaged from the support and guide structure responsive to the ramp approaching its fully extended position. In a first form of ramp, a biasing structure is operatively connected between the sections yieldingly resisting downward swinging of the outer end section as it disengages from the support and guide structure during extension of the ramp and the biasing structure is operative to counteract a major portion, only, of the force of gravity acting upon the outer end section to swing the outer end thereof down- wardly as the ramp moves to its fully extended position. A second form of ramp structure is provided for gently lowering the outer end of the ramp to the ground after full ramp extension and also for raising the outer portion of the ramp to an essentially horizontal position prior to ramp retraction.
Redding Charles E.
Redding Edward M.
Mccarthy Tetrault Llp
Redding Charles E.
Redding Edward M.
LandOfFree
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