Counterbalance mechanism for fold out ramp

Details Counterbalance mechanism for fold out ramp Counterbalance mechanism for fold out ramp

B - Operations, Transporting

65

G

B65G 69/28 (2006.01) B60P 1/43 (2006.01)

Patent

CA 2718457

A ramp assembly has a ramp portion configured for reciprocating motion between a stowed position, a deployed position, and a neutral position. A counterbalance is associated with the ramp portion and includes a drive element with a spring fitting. The drive element is rotatably coupled about a first axis of rotation that moves along an arcuate path. A restraint is slidably coupled to the drive element and is also rotatably coupled about a fixed axis of rotation. An end stop is associated with the restraint. A compression spring is disposed between the spring fitting and a portion of the restraint so that the compression spring provides a force to bias the ramp portion toward the neutral position.

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