Coupling ring for ventilation ducts

Details Coupling ring for ventilation ducts Coupling ring for ventilation ducts

2001-01-17

2002-01-22

Siegel, Mitchell (Department: 2912)

Environmental heating and cooling; fluid handling and sanitary e

Heating or cooling

Element or attachment, not elsewhere specified

Design Patent

active

D0453042

CLAIM:
The ornamental design for a coupling ring for ventilation ducts, as shown.

REFERENCES:
patent: D231356 (1974-04-01), Kurr
patent: 5129690 (1992-07-01), Meinig et al.
patent: 5983496 (1999-11-01), Hermanson
patent: 2 311 031 (1998-06-01), None
AccuFlange: Round&Oval Duct Connection System, Accu Duct Mfg., product brochure, 1998, pp. 1-32.
LindabRekt, Instruction manual, Lindab Nord AB, May 20, 1998, pp. 1-4.
Rektangulara kanalsystem, Lindab Rekt, product brochure 2000, pp. 1-8.
Introduction to the Rectangular Duct Construction Schedules, HVAC Duct Construction Standards Metal and Flexible—2nded., SMAGNA Section 1.8 ff., pp. 1.12-1.43.

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