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Publication numberUSD454949 S1
Publication typeGrant
Application numberUS 29/135,759
Publication dateMar 26, 2002
Filing dateJan 17, 2001
Priority dateJan 17, 2001
Publication number135759, 29135759, US D454949 S1, US D454949S1, US-S1-D454949, USD454949 S1, USD454949S1
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 D454949 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 an oval coupling ring of the new design.

FIG. 2 is a rear perspective view of the coupling ring of the new design with a rear three-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 at a central straight portion of the same, 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
US7645189Nov 27, 2006Jan 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
USD755356 *Jan 29, 2015May 3, 2016Vaztec, LlcSeal
USD799657 *May 12, 2016Oct 10, 2017Briggs & Stratton CorporationFilter
U.S. ClassificationD23/393