Connector for air ducts

Details Connector for air ducts Connector for air ducts

1989-04-18

1990-07-17

Arola, Dave W.

Pipe joints or couplings

Particular interface

Annular socket

285371, 285424, 285915, 285906, F16L 2500

Patent

active

049416936

ABSTRACT:
A connector for connecting end-to-end two spiral-wound sheet metal air ducts. The connector is an annular structure with opposite end segments, each of which presents an annular recess or groove which is open at its outer end and closed at its inner end and filled with sealing mastic there. The dimension of each recess or groove transverse to the longitudinal axis of the ducts and the connector is substantially equal to the maximum thickness of the corresponding duct (i.e., where its spiral rib is located) so that each duct has a snug sliding fit in the corresponding recess.

REFERENCES:
patent: 394479 (1888-12-01), Evans
patent: 2275572 (1942-03-01), Somers
patent: 2535186 (1950-12-01), Anderson
patent: 2625872 (1953-01-01), Follansbee et al.
patent: 3415543 (1960-12-01), Keating
patent: 3689114 (1972-09-01), Meserole
patent: 3905621 (1975-09-01), DeMarco
patent: 4558892 (1985-12-01), Daw
patent: 4669762 (1987-06-01), Jenkins

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