Bridges – Gangway – ramp – or dock leveler – Attached
Patent
1976-10-19
1978-07-04
Byers, Nile C.
Bridges
Gangway, ramp, or dock leveler
Attached
E01D 100
Patent
active
040979490
ABSTRACT:
An electrical assembly which can be conveniently added to a biased down dock leveler, having a ramp already in use, or around which a dock leveler could be manufactured and installed at the end user's facilities, for lifting the dock leveler comprising an electric motor, means to activate the motor and a scissors arm adapted to be raised from a lowered position by the motor, the scissors arm being pivotally secured to a pivot arm which is hinged for rotational movement about one end, the other end being adapted to lift the ramp of the leveler whereby when the scissors arm is raised, the pivot arm is raised, thus raising the ramp of the leveler, the electric motor being of such construction that when inactive, it does not preclude the manual lifting and lowering of the ramp.
REFERENCES:
patent: 1380229 (1921-05-01), Manheim
patent: 1905947 (1933-04-01), Morgan
patent: 2904802 (1959-09-01), Hartman
patent: 2974336 (1961-03-01), Kelley
patent: 3137017 (1964-06-01), Pfleger
patent: 3189199 (1965-06-01), Eaton
patent: 3249956 (1966-05-01), Zajac
patent: 3316575 (1967-05-01), Larsen
patent: 3411169 (1968-11-01), Guerke
patent: 3786530 (1974-01-01), Le Clear
patent: 3902213 (1975-09-01), Pfleger
Byers Nile C.
Hughes Ivor M.
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