Fire escape – ladder – or scaffold – Single stile – strand or pole
Patent
1990-11-29
1992-05-05
Machado, Reinaldo P.
Fire escape, ladder, or scaffold
Single stile, strand or pole
182100, 182206, E06C 748, E06C 134
Patent
active
051099543
ABSTRACT:
An improved apparatus supports weight on an upright structure. The apparatus has a frame with a weight bearing surface and a mechanism attached to the frame that grips the structure to hang the frame on the structure free of contact with the ground. The gripping mechanism can be easily attached to and removed from the structure by the user from a position on the ground. The force that gripping mechanism exerts to hold the frame in place upon the structure is directly proportional to the weight borne by the frame.
REFERENCES:
patent: 985349 (1911-02-01), Rosenfelder
patent: 1142072 (1915-06-01), Wingerd
patent: 1961289 (1934-06-01), Gardner
patent: 3028929 (1962-04-01), Chubbs
patent: 3995714 (1976-12-01), Brookes
patent: 4018301 (1977-04-01), Nameche
patent: 4467890 (1984-08-01), McCallum
patent: 4946004 (1990-08-01), Henson
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