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US 5,088,143 AGranted
Dock leveler lip actuation mechanism
AssigneeThe Serco Corporation
InventorJames C. Alexander
Life of this patent
Estimating the term…
Abstract
A dock leveler having an operative lever arm assembly to assist in raising the lip by spring action. The assembly comprises a latch arm which selectively engages a series of spaced stop positions on the underside of the deck to support the lip in an outward postion should it not fully extend during the raising of the deck. A hydraulic shock absorber is adapted to be coupled to the lever assembly at a variety of spaced mounting points on the lever assembly.
Claims13
A dock lever comprising:
- a frame, a deck pivotably mounted to said frame, a lip pivotably mounted to one end of said deck, stop means on an underside of said deck;
- a lip arm attached to said lip, a lever assembly pivotably mounted on said deck and coupled to said lip arm, resilient means coupled to said lever arm assembly to extend said lip as said deck raises;
- a latch arm coupled to said lever assembly an engageable with said stop means to hold said lip in an outward extended position;
- and a chain attached at one end to said frame and at another end to said latch arm, whereby as deck pivots on said frame to raise, said chain tensions to extend said lip by rotation relative to said deck and to rotate said latch arm into engagement with said stop means.
1 more element
A dock leveler comprising;
- a frame, a deck pivotably mounted to said frame, a lip pivotably mounted to one end of said deck,
- a lever assembly pivotably mounted on said deck and coupled to said lip:
- a hydraulic shock absorber mounted to said deck and said lever assembly and, a series of mounting positions on said lever assembly to position one end of shock absorber at different spaced locations relative to a pivot point for said lever assembly.
Dependencies are inferred from the claim text.