Sealing rings for ventilation ducts

- Lindab AB
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Description

FIG. 1 is a perspective view of a sealing ring according to a first embodiment of the new design, as seen obliquely from one side.

FIG. 2 is a cross-sectional view of the sealing ring of FIG. 1 shown on an enlarged scale.

FIG. 3 is a perspective view of a sealing ring according to a second embodiment of the new design, as seen obliquely from one side; and,

FIG. 4 is a cross-sectional view of the sealing ring of FIG. 3 shown on an enlarged scale.

Claims

The ornamental design for sealing rings for ventilation ducts, as shown.

Referenced Cited
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D285247 August 19, 1986 Jörnhagen
D342567 December 21, 1993 Boen
D347885 June 14, 1994 Gustafsson
D351459 October 11, 1994 Andersson
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Foreign Patent Documents
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Other references
  • Veloduct® Cirkulärt kanalsystem, Produktkatalog 1997, ABB Ventilation Products AB Division Veloduct pamphlet.
  • “Sistema Di Tnenuta Ring”, issued by Climovent Ssytem, an Italian Company no date.
  • “Veloduct” catalog 1977, ABB Ventilation Products AB, Division Veloduct.
  • Van Huffel Catalog L-56, “Where Ideas Take Shape”.
Patent History
Patent number: D447223
Type: Grant
Filed: May 5, 1999
Date of Patent: Aug 28, 2001
Assignee: Lindab AB (Bastad)
Inventors: Lars-Ake Mattsson (Bastad), Pontus Andersson (Angelholm), Kenneth Lennartsson (Torekov), Tomas Persson (Munka Ljungby)
Primary Examiner: Louis S. Zarfas
Assistant Examiner: Robert A. Delehanty
Attorney, Agent or Law Firm: Weingarten, Schurgin, Gagnebin & Hayes LLP
Application Number: 29/104,424
Classifications
Current U.S. Class: Gasket Or Packing (D23/269)
International Classification: 2301;