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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
Images(5)
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Claims(1)
  1. The ornamental design for a coupling ring for ventilation ducts, as shown.
Description

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
Reference
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
Classifications
U.S. ClassificationD23/393