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Coupler Connector

October 26th, 2008

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Redundant latch/verifier for a quick connector

Quick connector coupling comprising a connector body, a tubular male member with an upset, a primary retainer and a separate redundant latch/verifier. The connector body defines a through bore and the male member extends into the bore. The primary retainer releasably secures the male member within the connector body.

The redundant latch/verifier is releasably coupled to the connector body and movable between an unlatched position and a latched position. It includes spaced apart fingers with verifying tabs that permit movement to the latched position only after full insertion of the male member. The fingers have release tabs to manually spread the extension beams. In another form, the connector body includes locking pads extending radially inward. The legs of the primary retainer are located inward of the locking pads preventing the legs from moving to a released position if said male member is pulled in a direction to remove it from the connector body.

In automotive and other fields, quick connector couplings, which generally include a male member received and sealingly retained in a female connector body, are often utilize to provide a fluid connection between two components or conduits, thusestablishing a fluid line between the two components. Use of quick connector couplings is advantageous in that a sealed and secured fluid line may be established with a minimum amount of time and expense.

A number of methods and mechanisms exist for securing the male member and female connector body of a quick connector coupling together.

One type of retention mechanism involves use of a retainer in the form of a retention lip inserted through slots formed in the exterior of the connector body. Beams extending through the slots are poised between the male member upset and therearward surfaces defining the slots, thereby preventing disconnection of the coupling. Due to the physical appearance of such retainers, they are referred to in the trade as "horseshoe" retainers. An example of this type of retainer is found in U.S. Pat. No. 5,586,792, to Kalahassthy et al., which is herein incorporated by reference. The "horseshoe" retainer, disclosed in the ’792 patent, permits easy release of the coupling without significantly increasing the complexity of the coupling. Application for U.S. Ser. No. 11/087,358 filed Mar. 23, 2005 disclosed various arrangements of connectors with horseshoe type retainers and a redundant latch/verifier. The disclosure of that application is incorporated by reference herein.

The quick connector coupling of the present invention is an alternative of the type of connector disclosed in the ’792 patent and the application Ser. No. 11/087,358. The arrangement of the present invention provides the benefit that onassembly of the quick connector coupling, the redundant latch/verifier cannot be moved to its latched position unless the associated tube is in its fully inserted position. Its position thereby provides a physical and visual indication that the tube isnot fully inserted. The arrangement of the present invention also provides the benefit that the legs of the primary retainer cannot be accidentally moved from their locked position to their unlocked position if the male member is pull in the forwarddirection relative to the connector body and then the male member is twisted or rotated around its axis.

Once placed in the latched position, the redundant latch/verifier prevents unintentional release of the tube by the primary retainer. The redundant latch/verifier is also able to independently retain the male member of the tube in the connectorbody should the primary retainer fail.

As with the arrangement of the primary retainer and the redundant latch/verify of the
quick connector
coupling, the arrangement of the primary retainer and the redundant latch/verifier of the alternative quick connectorcoupling, namely locating the verifying tab of the redundant latch/verifier immediately axially rearward of the legs of the primary retainer, assures that the fingers of the redundant latch/verifier are only able spreadoutward after the upset has completely passed the legs of the primary retainer.

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