Lip extender for loading dock levelers

Details Lip extender for loading dock levelers Lip extender for loading dock levelers

1976-08-04

1978-01-03

Byers, Jr., Nile C.

Bridges

Gangway, ramp, or dock leveler

Attached

B65G 1100

Patent

active

040658244

ABSTRACT:
A lip extender for use with a loading dock leveler. The lip extender includes a lower link connected at its lower end to the base plate of the leveler and a toggle arm connected at its upper end beneath the lip. The opposite ends of the toggle arm and lower link are pivotally connected together. Upward movement of the hinge connection between the bridge plate and lip moves them both upwardly to a cocked position to which they are supported by the toggle arm and lower link, which pivot into an over-center position. Downward force exerted on the upper part of the bridge plate causes a cam follower carried by the pivotal connection between the toggle arm and lower link to engage a cam surface mounted beneath the bridge plate. A coil spring mounted about the lower pivotal point of the lower link exerts pressure against the lower link, thereby counter-balancing the weight of the lip and bridge plate during pivotal movement of the lower link in either direction.

REFERENCES:
patent: 3327335 (1967-06-01), Beckwith
patent: 3426377 (1969-02-01), Beckwith
patent: 3460175 (1969-08-01), Beckwith
patent: 3486181 (1969-12-01), Hecker
patent: 3497893 (1970-03-01), Beckwith
patent: 3583014 (1971-06-01), Brown
patent: 3636578 (1972-01-01), Dieter
patent: 3646627 (1972-03-01), Potter
patent: 3974537 (1976-08-01), Ellis et al.

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