Fire escape – ladder – or scaffold – Self-sustaining
Patent
1988-01-25
1989-09-19
Machado, Reinaldo P.
Fire escape, ladder, or scaffold
Self-sustaining
52638, 403 49, E04G 700, F16B 700
Patent
active
048672742
ABSTRACT:
The system includes vertical posts with apertured disks secured thereto at intervals, coupling heads, wedge-like keys, scaffold pipes, coupling head extensions, and tank-link heads. Each coupling head has a horizontal slot receiving an apertured disk when the head is pushed into mounted position thereon, and has top and bottom key-receiving openings above and below such slot. A wedge-like key extends down through the top key-receiving opening, through a disk aperture, then through the bottom key-receiving opening, fastening the coupling head to the disk. Coupling heads for horizontal scaffold pipes have extensions insertable into the pipes. Diagonal scaffold pipes have tang-link heads, whose tank has an aperture for a pivot provided on an associated coupling head. Conventionally, the disks, coupling heads and pipes are all made of steel, the disks of 9 mm thickness and 122 mm diameter. The disclosed lighter-weight version employs disks and scaffold pipes made not of steel, but of light metal such as aluminum. The coupling heads although still of steel are differently designed, employing a smaller volume of material and thus lighter in weight. The disks are of 10 mm thickness and 124 mm diameter, producing a 33% loadability increase. Numerous other dimensional and configurational modifications of the standard elements compensate for any structural strength inferiority compared to the standard elements, but the herein disclosed lighter-weight versions thereof remain compatible with, and can be freely intermixed with, the heavier-weight standard elements.
REFERENCES:
patent: 1797691 (1931-03-01), Merrill
patent: 4044523 (1977-08-01), Layher
patent: 4180342 (1979-12-01), Layher
patent: 4372424 (1983-02-01), Langer
patent: 4493578 (1985-01-01), D'Alessio
patent: 4603756 (1986-08-01), Layher
patent: 4718787 (1988-01-01), Bahloul
Koss, Jr. Theodore J.
Machado Reinaldo P.
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