Boarding platform

Details Boarding platform Boarding platform

1979-02-23

1980-09-16

Byers, Jr., Nile C.

Bridges

Gangway, ramp, or dock leveler

Attached

187 94, 187 73, 14 715, 182 36, E01D 100

Patent

active

042221404

ABSTRACT:
A boarding platform for transferring personnel between a fixed dock structure and a barge or the like is disclosed. The boarding platform includes a pair of vertical tracks having a carriage mounted for raising and lowering movements relative to the tracks. A boarding ramp is mounted on the carriage which is normally biased to a vertical or raised position. Counterweights are provided on the carriage so that a main raising cable carries only a portion of the weight of the carriage and the ramp. A winding motor for the main cable is suspended from a high-low weight sensing load cell which operates a mechanism to lock the carriage relative to the tracks (a) if a person stands on the ramp, (b) if the main cable breaks, or (c) if one or more of the counterweights releases.

REFERENCES:
patent: 610901 (1898-09-01), Herren
patent: 980522 (1911-01-01), Haywood
patent: 1068105 (1913-07-01), Carman
patent: 1111872 (1914-09-01), Strauss
patent: 1698209 (1929-01-01), Barlow
patent: 1797808 (1931-03-01), Tomkinson
patent: 1936780 (1933-11-01), Arnold
patent: 2029419 (1936-02-01), Gilowitz
patent: 2677141 (1954-05-01), Senn
patent: 2963178 (1960-12-01), Walker
patent: 3913757 (1975-10-01), Lovey

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