Ladder step construction for use with recreational vehicles and

Details Ladder step construction for use with recreational vehicles and Ladder step construction for use with recreational vehicles and

1986-08-06

1988-01-05

Machado, Reinaldo P.

Fire escape, ladder, or scaffold

Rung or rung-to-stile connection

182 46, 182194, E06C 708

Patent

active

047169885

ABSTRACT:
A new construction method for a ladder for use on recreational vehicles and boats is disclosed. The ladder comprises two parallel metal tubular rails and a plurality of extruded aluminum steps, including step end caps. The steps are a unique triple-void hollow extrusion, fastened to the ladder rails with a spring pin that goes through two walls of the step extrusion and both walls of the rail tubing, anchoring in a third wall of the step extrusion. This provides a solid, close-coupled assembly that avoids the stresses caused by traditional cantilevered screw fastening methods. Plastic end caps molded with interference fingers, permitting assembly without mechanical fasteners, fit in the ends of the steps, providing protection and an attractive finish to the steps.

REFERENCES:
patent: 3549182 (1970-12-01), Bogue
patent: 3944024 (1976-03-01), Adas
patent: 4151895 (1979-05-01), Rasada
patent: 4193477 (1980-03-01), Broyles
patent: 4496029 (1985-01-01), Kuroda
patent: 4536037 (1985-08-01), Rink

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