Conveyors: power-driven – Conveyor or accessory therefor specialized to convey people – By stairway having steps forming an endless member
Patent
1981-02-25
1982-11-30
Love, John J.
Conveyors: power-driven
Conveyor or accessory therefor specialized to convey people
By stairway having steps forming an endless member
198833, 474231, B65G 912, B65G 2314
Patent
active
043612202
ABSTRACT:
A multiple strand drive chain for transmitting power from toothed sprockets to an endless belt constructed of toothed links. The strand which cooperates with the toothed links has a plurality of spaced rollers, with alternate rollers, which have a first predetermined diameter, being constructed of a deformable, resilient material. The intervening rollers, which have a smaller diameter than the first predetermined diameter, are constructed of a substantially non-deformable, rigid material. The deformable rollers normally share the driving load in a substantially uniform manner, but as the chain wears the sharing becomes disproportionate. The non-deformable rollers greatly extend chain life by limiting the maximum driving load placed on any one deformable roller.
REFERENCES:
patent: 2158622 (1939-05-01), Festenberg
patent: 2770144 (1956-11-01), Bendall
patent: 2816453 (1957-12-01), Frank
patent: 2934120 (1961-05-01), Hurry
patent: 3071981 (1963-01-01), Kuntzmann
patent: 3167935 (1965-02-01), Fawick
patent: 3677388 (1972-07-01), Boltrek
patent: 3880014 (1975-04-01), Bendall
patent: 4114467 (1978-09-01), Peterchack
patent: 4123947 (1978-11-01), Smith
Bond Brian
Lackey D. R.
Love John J.
Westinghouse Electric Corp.
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