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Publication numberUSD456071 S1
Publication typeGrant
Application numberUS 29/135,758
Publication dateApr 23, 2002
Filing dateJan 17, 2001
Priority dateJan 17, 2001
Publication number135758, 29135758, US D456071 S1, US D456071S1, US-S1-D456071, USD456071 S1, USD456071S1
InventorsLars-Åke Mattsson, Kenneth Lennartsson, Sten Högman, Carl-Gustaf Sondén
Original AssigneeLindab Ab
Export CitationBiBTeX, EndNote, RefMan
External Links: USPTO, USPTO Assignment, Espacenet
Coupling ring for ventilation ducts
US D456071 S1
Abstract  available in
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  1. The ornamental design for a coupling ring for ventilation ducts, as shown.

FIG. 1 is a front perspective view of a circular coupling ring of the new design.

FIG. 2 is a rear perspective view of the coupling ring of the new design with a rear double-lip element.

FIG. 3 is a rear view of the coupling ring.

FIG. 4 is a side view of the coupling ring.

FIG. 5 is a front view of the coupling ring.

FIG. 6 is an end view of the coupling ring; and,

FIG. 7 is a cross-section of the coupling ring, showing said rear element, section line VII—VII in FIG. 5.

Non-Patent Citations
1AccuFlange: Round & Oval Duct Connection System, Accu Duct Mfg., product brochure, 1998, pp. 1-32.
2Introduction to the Rectangular Duct Construction Schedules, HVAC Duct Construction Standards Metal and Flexible—2nd ed., SMAGNA Section 1.8 ff., pp. 1.12-1.43.
3LindabRekt, Instruction manual, Lindab Nord AB, May 20, 1998, pp. 1-4.
4Rektangulara kanalsystem, Lindab Rekt, product brochure 2000, pp. 1-8.
Referenced by
Citing PatentFiling datePublication dateApplicantTitle
US7140960Apr 19, 2004Nov 28, 2006Applied Applications International, Inc.Boot hanger mounting bracket
US7523964Mar 24, 2005Apr 28, 2009Langdon IncorporatedSealing gasket for ventilation duct system
US7645189Jan 12, 2010Applied Applications International, Inc.Boot hanger mounting bracket
US20050003754 *Apr 19, 2004Jan 6, 2005Allan PilgerBoot hanger mounting bracket
US20070123161 *Nov 27, 2006May 31, 2007Allan PilgerBoot hanger mounting bracket
U.S. ClassificationD23/393