Pipe joints or couplings – With assembly means or feature – Particular tool-engaging means or with tool
Patent
1990-02-09
1991-12-03
Arola, Dave W.
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
050694847
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. A orifice is formed in the corner region of each L-shaped connector in alignment with the orifice in the aubutting connector. A cleat is integrally formed with and extends inwardly from the peripheral edge of each of the orifices. A score line is formed at the base of each cleat on the outside surface of the connector to allow the cleat to be bent outwardly about the score line so as to extend through, and over the peripheral edge of, the orifice in the abutting L-shaped connector to lock the connectors together.
REFERENCES:
patent: 6428 (1849-05-01), Warner
patent: 139841 (1873-06-01), Weston
patent: 913685 (1909-03-01), Boyd
patent: 2396030 (1946-03-01), Terry
patent: 3199901 (1965-08-01), Jeppsson
patent: 3347569 (1967-10-01), Lindgren
patent: 3712649 (1973-01-01), Martin
patent: 4479288 (1984-10-01), Jones
patent: 4542923 (1985-09-01), LaCrosse et al.
patent: 4552388 (1985-11-01), Menly
patent: 4558892 (1965-12-01), Daw et al.
patent: 4636105 (1987-01-01), Johansson
Arola Dave W.
Met-Coil Systems Corporation
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