Fire escape – ladder – or scaffold – Ladder – With hook or grab
Patent
1989-10-16
1990-08-07
Machado, Reinaldo P.
Fire escape, ladder, or scaffold
Ladder
With hook or grab
182107, E06C 748
Patent
active
049460048
ABSTRACT:
This invention relates to a pole gripping assembly for use in stabilizing ladders used to ascend a tree, utility pole or the like. The assembly comprises a yoke member having an arcuate shape which is connected between the side rails at an upper end of a ladder. The yoke member is connected by brackets to the side rails for pivotal movement about a transverse axis so as to pivot at least between a plane common with the lader and a plane perpendicular to the ladder. The assembly further includes a pair of arcuate gripping arms which are pivotally connected to the yoke member adjacent opposite ends thereof. The gripping arms are biased to an open position to receive a pole and pivot to a closed position when a pole moves into a pole receiving space generally between the opposite ends of the yoke member. In accordance with the invention the gripping arms hold the pole in the pole receiving space until the ladder is withdrawn from the pole.
REFERENCES:
patent: 1961289 (1934-06-01), Gardner
patent: 1994369 (1935-03-01), Risser
patent: 2232414 (1941-02-01), Swann
patent: 3037579 (1962-06-01), Barrow
patent: 3336999 (1967-08-01), McSwain
patent: 3896900 (1975-07-01), Hunter
patent: 4018301 (1977-04-01), Namelhe
patent: 4090587 (1978-05-01), Pyle
patent: 4363378 (1982-12-01), Williams
patent: 4469195 (1984-09-01), Sartain
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