Bridges – Gangway – ramp – or dock leveler
Patent
1995-01-31
1995-12-19
Britts, Ramon S.
Bridges
Gangway, ramp, or dock leveler
14 711, 14 713, E01D 100
Patent
active
054758882
ABSTRACT:
A lip lifting mechanism for the pivotable lip of a dock leveler moves the lip to an operative extended position as the ramp of the dock leveler is moved from a raised position toward a lowered position. The lip lifting mechanism includes a push bar, a lifting rod, a lug engageable with the lip through the lifting rod, and a link arrangement to which the lifting rod is pivotably mounted, with the push bar being engageable with the link arrangement upon downward movement of the ramp. The push bar moves the link arrangement and the lifting rod into an over-center toggle position to extend the lip. Engagement of the lip with the bed of a truck results in the link arrangement and the lifting rod being moved to an under-center release position, so as to enable the lip to fall to a pendant position when the truck moves away from the dock. The invention contemplates a unique construction of the engagement structure between the push bar and the link arrangement for increasing the force applied to the lifting rod by the push bar, and a trip structure for ensuring that the lip is always returned to its pendant position when the dock leveler is in a lowered, storage position.
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Britts Ramon S.
Kelley Company Inc.
O'Connor Pamela A.
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