Bridges – Gangway – ramp – or dock leveler
Patent
1986-09-29
1987-12-15
Novosad, Stephen J.
Bridges
Gangway, ramp, or dock leveler
193 41, 238 10R, E01D 100
Patent
active
047122641
ABSTRACT:
A ramp for stairways is constructed from a plurality of separate right triangular modules which individually nest in the recesses of the stairway formed by the step treads and risers. The several modules are securely releasably interconnected on opposite sides thereof by tethered locking pins received by registering locking apertures of male and female connector elements. The continuous stairway ramp formed by two parallel groups of modules is laterally adjustable through connector slides on the riser walls of the modules. Two parallel ramp trackways are formed having opposite side upstanding lips and the surfaces of the trackways are covered with a grooved rubber matting to facilitate the passage of hand trucks and wheelchairs smoothly along the ramp.
REFERENCES:
patent: 299376 (1884-05-01), Given
patent: 484086 (1892-10-01), Cassidy
patent: 981613 (1911-01-01), Carter
patent: 1505116 (1924-08-01), Wiebe
patent: 2141529 (1938-12-01), Gravelle
patent: 2312273 (1943-02-01), Stochmal
patent: 3009183 (1961-11-01), Lay
patent: 3487489 (1970-01-01), Kuhns
patent: 4368553 (1983-01-01), Perry
patent: 4528711 (1985-07-01), Packer
Letchford John F.
Novosad Stephen J.
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