Circular sleeve coupling

- Lindab AB
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Description

FIG. 1 is a perspective view of a circular sleeve coupling, showing our new design, as seen obliquely from the front;

FIG. 2 is a perspective view of the sleeve coupling, as seen obliquely from the back;

FIG. 3 is a side elevation of the sleeve coupling, the opposite side being a mirror image thereto.

Referenced Cited
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Other references
  • Product Catalog entitled "Ducts and Fittings," issued by Lindab Ab, Caswell Road, Brackmills Industrial Estate, Northampton NN4 OBR, England, 52 pp., first distributed in 1987. Product Catalog entitled "Circular Duct System," issued by Lindab AB, 45 Caswell Road, Brackmills Business Park, Northampton NN4 OPW, England, 42 pp., Mar. 1982. Swedish-language Product Catalog entitled "Veloduct Cirkulart kanalysystem," issued by Flakt Veloduct Ab, Prastgardsvagen 15, Box 84, 153 00 Jarna. Sweden, 29 pp., Jun. 1991. Product literature entitled "Spiro Bend Segment Cutting Machine l" issued by Spiro Investment AG, Industriestrasse, CH-3178 Boesingen, Switzerland, 2 pp., first distributed c. 1978. Product literture entitled "Spiro Bend Segment Cutting Machine II" issued by Spiro Investment Ag, Industriestrasse, CH-3178 Boesingen, Switzerland, 6 pp., first distributed c. 1980. German-language Product literature entitled "Kurven-schneidemaschine delta 2," issued by Suter Ag Seon, 5703 Seon/Schweiz, Switerzerland, 6 pp., first distributed c. 1982. Product literature entitled "Sean Forming and Locking Machine beta 2," issued by Suter Ag Seon, 5703 Seon/Schweiz, Switzerland, 4 pp., first distributed c. 1982. Curve Cutting Machine Delta 2 issued by Emil Suter Maschinenfabrik AG, CH-5703 Seon/Schweiz (English translation). Pipes by Solpast AB disclosed in a catalogue entitled "Svensk Byggkatalog Arp-87", issued by Svensk Byggtajanst in 1987. Product NPU disclosed in a catalogue entitled "Ventilation-88", issued by Lindab AB in 1988. Product ESIU disclosed in a catalogue entitled "Ventilation-88", issued by Lindab AB in 1988. Product IK disclosed in a catalogue entitled "Ventilation-88", issued by Lindab AB in 1988. General drawings No. J299102, producted by the Swedish company Flakt and daetd Nov. 19, 1981 (811119). Catalogue entitled "Kanalysystem Veloduct", issued by Flakt in 1982.
Patent History
Patent number: D360019
Type: Grant
Filed: Apr 9, 1993
Date of Patent: Jul 4, 1995
Assignee: Lindab AB (Bastad)
Inventors: Carl-Gustaf Sonden (Angelholm), Kenneth Lennartsson (Torekov)
Primary Examiner: Stella Reid
Assistant Examiner: Eric Watterson
Law Firm: Weingarten, Schurgin, Gagnebin & Hayes
Application Number: 7/6,940
Classifications
Current U.S. Class: Coupling Or Joint (D23/262)