High capacity, retractable furnace hearth

Details High capacity, retractable furnace hearth High capacity, retractable furnace hearth

1988-01-20

1989-02-07

Yuen, Henry C.

Heating

Work chamber having heating means

Having means by which work is progressed or moved mechanically

432241, 432246, 432236, 266253, 266277, F27B 914, F27B 512

Patent

active

048028444

ABSTRACT:
A retractable, roller hearth for use in an industrial heat treat furnace is disclosed whereby the alloy rollers are retracted from their load bearing position when the furnace heat treat processes are underway thus maintaining the rated load capacity of the furnace. A plurality of guided rail support posts and guided, sealed lift posts accurately assure straight line vertical motion of the refractory base enabling contact between fibrous rope seals to seal the hearth from the cooler, lower portions of the furnace when the hearth is in a raised position.

REFERENCES:
patent: 1946270 (1934-02-01), Breaker
patent: 2830805 (1958-04-01), Harris
patent: 2869856 (1959-01-01), Greene
patent: 4003714 (1977-01-01), Foglino et al.
patent: 4214868 (1980-07-01), Tabuchi
patent: 4403953 (1983-09-01), Suzuki
patent: 4421481 (1983-12-01), Holz et al.
patent: 4455177 (1984-06-01), Filippov et al.
patent: 4512558 (1985-04-01), Lueth

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