Self releasing hold-down mechanism for dock leveler

Details Self releasing hold-down mechanism for dock leveler Self releasing hold-down mechanism for dock leveler

1998-03-25

2000-05-16

Lillis, Eileen Dunn

Bridges

Gangway, ramp, or dock leveler

Attached

14 695, E01D 100

Patent

active

060618590

ABSTRACT:
A self releasing hold-down device for a dock leveler having a ramp mounted for pivotal movement about a hinge axis between a stored position and a working position includes an elongates ratchet bar engageable with a pawl mounted on a body connected to a rod which is anchored at one end to the leveler frame. One end of the rod includes a retainer and release pin member mounted thereon and whose position is adjustable by a nut threadedly engaged with the rod. A coil spring is sleeved over the rod and engageable with the retainer and release pin member. The body includes an elongated tube journalling the coil spring and a portion forming a recess for supporting the pawl. A release actuator is pivotally mounted on the body and is engageable by release pins on the retainer and release pin member in response to forces acting on the ramp to effect momentary release of the hold-down device. A manual release lever is operable, at will, to also effect release of the pawl from the ratchet bar.

REFERENCES:
patent: 3579696 (1971-05-01), Hecker, Jr. et al.
patent: 3646627 (1972-03-01), Potter
patent: 3699601 (1972-10-01), Hecker, Jr. et al.
patent: 3877102 (1975-04-01), Artzberger
patent: 3967337 (1976-07-01), Artzberger
patent: 3997932 (1976-12-01), Artzberger
patent: 4531248 (1985-07-01), Swessel et al.

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