Duct corner accessory with pivoting flaps

Details Duct corner accessory with pivoting flaps Duct corner accessory with pivoting flaps

2008-12-03

2011-11-15

Ferguson, Michael P (Department: 3679)

Pipe joints or couplings

Elbow

Sheet metal

C285S184000, C403S084000, C403S101000, C403S205000

Reexamination Certificate

active

08056932

ABSTRACT:
The invention relates to a corner accessory for placing at the junction between at least two ducts that extend in different directions, the accessory comprising two distinct flaps, one of which includes a projecting element and the other of which includes a circular opening receiving said projecting element to allow said flaps to pivot about a pivot axis, the circular edge of said opening opening out locally to a straight slot that extends radially relative to the circular edge of said opening and that opens out into a free edge of said flap. According to the invention, said projecting element is a cylindrical wall presenting firstly an outside diameter equal, ignoring clearance, to the inside diameter of said circular opening so that during pivoting of one flap relative to the other, the outside face of said cylindrical wall slides over the edge face of the circular edge of said opening, and presenting secondly a height that varies around its circumference.

REFERENCES:
patent: 3000049 (1961-09-01), Terry, Jr
patent: 3823522 (1974-07-01), Jureit et al.
patent: 6478499 (2002-11-01), Fugman et al.
patent: 7055688 (2006-06-01), Watson et al.
patent: 7594575 (2009-09-01), Choi et al.
patent: 2005/0111909 (2005-05-01), Mathieu et al.
patent: 20 2005 012 520 (2005-11-01), None
patent: 1 530 273 (2005-05-01), None
patent: 1 750 339 (2011-07-01), None
French Search Report dated Jun. 18, 2008, from corresponding French application.

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