Collapsible duct coupling

Details Collapsible duct coupling Collapsible duct coupling

1993-09-24

1995-09-12

Nelli, Raymond A.

Ventilation

Workstation ventilator

454 28, F24F 706

Patent

active

054493200

ABSTRACT:
Fiberglass reinforced plastic duct exhaust systems including sections of the duct system joined together by collapsible collar plastic joints having low melting points which collapse or drop-out of the system when exposed to high temperatures.

REFERENCES:
patent: 1926298 (1933-09-01), Moore
patent: 2804095 (1957-08-01), Schauenburg
patent: 4662268 (1987-05-01), Beavers
patent: 4867106 (1989-09-01), Staats

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