Pipe joints or couplings – With assembly means or feature – Particular tool-engaging means or with tool
Patent
1991-06-27
1992-11-24
Nicholson, Eric K.
Pipe joints or couplings
With assembly means or feature
Particular tool-engaging means or with tool
285328, 285363, 285424, 285405, 29513, F16L 3500
Patent
active
051657309
ABSTRACT:
A duct joining system having two L-shaped connectors for each duct corner. Each connector has two substantially perpendicular legs forming a corner region and has an inside and an outside surface with the outside surface of one L-shaped connector abutting the outside surface of the other L-shaped connector when the ducts are joined. An irregularly shaped opening is formed in the corner region of each L-shaped connector in alignment with the opening in the abutting connector. A tab having an enlarged head and a stem is integrally formed with and extends inwardly from the peripheral edge of each of the openings. A score line is formed at the base of the stem of each tab on the outside surface of the connector to allow the tab to be bent outwardly about the score line so that the tab can be inserted through the opening in the abutting L-shaped connector and than bent over to lock the connectors together.
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Nemmers James C.
Nicholson Eric K.
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