Quick connect tube coupling

Pipe joints or couplings – Movable jaw – Wedge bushing

Patent

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Details

285243, F16L 2106, F16L 3300, F16L 4700, F16L 4900

Patent

active

052305392

ABSTRACT:
A quick connect coupling for connecting a tube to a body having a stepped bore formed therethrough. The coupling includes a sleeve which is press fit in the bore. The inner surface of the sleeve has a cylindrical portion, a radially outwardly extending frusto-conical portion, and an internal shoulder defined therebetween. A collet is disposed within the sleeve having a boss portion which is slightly smaller than the inner diameter of the cylindrical portion of the sleeve. The boss portion supports and guides the collet for co-axial movement relative to the sleeve. The collet further includes an enlarged end portion having an external shoulder and a frusto-conical surface. The frusto-conical collet surface is disposed within the frusto-conical sleeve surface. The tube is inserted within the coupling within the collet. When it is attempted to move the tube out of the body, the frusto-conical collet surface engages the frusto-conical sleeve surface. Also, the external collet shoulder engages the internal sleeve shoulder. As a result, the collet (and the tube engaged thereby) are positively retained within the coupling and the body.

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