Coupling sleeve

• US 4,099,749 A
• Filed: 03/24/1975
• Issued: 07/11/1978
• Est. Priority Date: 04/08/1974
• Status: Expired due to Term

• Current Assignee: Air-O-Mulder BV
• Original Assignee: Air-O-Mulder BV
• Inventors: van Vliet, Cors
• Primary Examiner(s): Callaghan, Thomas F.
• Application Number:
  US05/561,345
• Time in Patent Office: 1,205 Days
• Field of Search: 285/398, 285/371, 285/340, 285/133 R, 285/133 A, 285/424, 285/47, 285/53, 403/300, 403/305, 403/314, 403/332, 403/287, 403/286
• US Class Current: 285/398
• CPC Class Codes: F16L 21/002 Sleeves or nipples for pipes of the same diameter; Reduction pieces with elastic sealing rings F16L21/022
• CPC Class Codes: F16L 59/147 the insulation being located inwardly of the outer surface of the pipe
• CPC Class Codes: F16L 59/182 Joints with sleeve or socket in general F16L21/00
• CPC Class Codes: F24F 13/0209 characterised by their connecting means, e.g. flanges
• CPC Class Codes: F28F 9/26 Arrangements for connecting different sections of heat-exchange elements, e.g. of radiators connecting different sections in water heaters F24H9/14 , connecting headers with inlet or outlet fittings F28F9/0246

Abstract

Coupling sleeve for the interconnection of hollow prismatic objects from sheet material, such as channel segments of an air heating device, said sleeve having a U- or W-shaped cross section, the limbs of this cross section having different length for facilitating the insertion of the edge of said prismatic objects into said coupling sleeve.

Claims

1. For use in interconnecting ventilation duct elements made of sheet material having smooth end portions, a coupling member comprising a coupling sleeve having at least two substantially spaced apart parallel flanges interconnected by a web portion, said flanges differing mutually as to axial length, the shortest flange adjoining one end of the web portion and the longest flange adjoining the other end of said web portion, the surfaces of the flanges which face one another being parallel and wedge locking means between said coupling sleeve and said ventilation duct elements and positioned on each side of said web portion and comprising a loose resilient strip having a plurality of upwardly and downwardly obliquely protruding teeth formed integrally from said strip, said teeth being disposed in a plurality of rows extending longitudinally and transversely to the major axis of said coupling sleeve, whereby each duct element may be easily inserted in one direction between the strip and one of the flanges and when the duct element is moved in the opposite direction said teeth will engage and lock said duct element to said coupling sleeve.