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; and,

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

Referenced Cited
U.S. Patent Documents
2535186 December 1950 Anderson
3327945 June 1967 Pfister
3368830 February 1968 French
4007941 February 15, 1977 Stancati
4050703 September 27, 1977 Tuvesson et al.
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. 1992. Swedish-language Product Catalog entitled "VELODUCT Cirkulart kanalsystem," issued by Flakt VELODUCT AB, Prastg.ang.rdsvagen 15, Box 84, 153 00 Jarna, Sweden, 29 pp., Jun. 1991. Product literature entitled "SPIRO Bend Segment Cutting Machine 1" issued by Spiro Investment AG, Industriestrasse, CH-3178 Boesingen, Switzerland, 2 pp., first distributed c. 1978. Product literature entitled "SPIRO Bend Segment Cutting Machine II" ossued 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, Switzerland, 6 pp., first distributed c. 1982. Product literature entitled "Seam 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).
Patent History
Patent number: D367316
Type: Grant
Filed: Apr 9, 1993
Date of Patent: Feb 20, 1996
Assignee: Lindab AB (Bastad)
Inventors: Carl-Gustaf Sonden (Angelholm), Kenneth Lennartsson (Torekov)
Primary Examiner: Louis S. Zarfas
Assistant Examiner: Eric Watterson
Law Firm: Weingarten, Schurgin, Gagnebin & Hayes
Application Number: 0/6,951
Classifications
Current U.S. Class: Coupling Or Joint (D23/262)