Locking device

Details Locking device Locking device

1980-12-29

1984-01-24

Machado, Reinaldo P.

Fire escape, ladder, or scaffold

Platform with elevating or lowering means

182 63, 182210, 182208, 187 9E, 187 11, B66B 920, E04G 122

Patent

active

044270933

ABSTRACT:
An automatic locking device is provided for a telescoping work platform that includes: a base frame, a middle frame and a platform frame, the locking device comprises a first sliding member mounted in the middle frame, a first notch in the base frame for receiving said first sliding member and a first cam on said platform for disengaging said first member from said first notch, it also comprises a second sliding member mounted to the middle frame, a second notch in the base frame for receiving said second member and a second cam on said base frame for disengaging said second member from said second notch.

REFERENCES:
patent: 459613 (1891-09-01), Newman
patent: 1112122 (1914-09-01), Detrick
patent: 2499091 (1950-02-01), Brubaker
patent: 2595120 (1952-04-01), Barnes
patent: 2987140 (1961-06-01), Olson
patent: 3187842 (1965-06-01), Quayle
patent: 3561568 (1971-02-01), Hansen
patent: 3621935 (1971-11-01), Bode
patent: 3737007 (1973-06-01), Herrell
patent: 4015686 (1977-04-01), Bushnell
patent: 4155428 (1979-05-01), Hansen

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