Equi crane anti-tipping device

Details Equi crane anti-tipping device Equi crane anti-tipping device

1986-06-04

1988-05-10

Swann, III, Glen R.

Communications: electrical

Condition responsive indicating system

Specific condition

33379, 340689, G08B 2100

Patent

active

047438932

ABSTRACT:
A crane anti-tipping device is provided that includes a warning alarm unit in the cab of the crane which includes two spaced switches each of which is responsive to a predetermined tilting of the crane to close an electric circuit to activate the warning alarm unit that the crane is at a dangerous degree of tilt. A modification provides a sensing device incorporated with a stabilizing foot which will activate an alarm in the crane cab that the ground bearing pressure of the stabilizing foot exceeds a preset magnitude.

REFERENCES:
patent: 2346066 (1944-04-01), Conrad
patent: 2743334 (1956-04-01), Valenti
patent: 2772411 (1956-11-01), Cooper
patent: 3192517 (1965-06-01), Werlin
patent: 3362022 (1968-01-01), Mork et al.
patent: 3657695 (1972-04-01), Birmingham
patent: 3848750 (1974-11-01), Hoge
patent: 4408196 (1983-10-01), Freeman

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