Movable or removable closures – Closures interconnected for concurrent movement – Opposed similar movement
Patent
1986-05-02
1987-06-23
Kannan, Philip C.
Movable or removable closures
Closures interconnected for concurrent movement
Opposed similar movement
49123, 49360, 49409, E05C 706
Patent
active
046742310
ABSTRACT:
A magnetic door opener device adapted to be positioned below a countertop made of non-magnetic materials, the device having a pair of magnets which attractively interact with a pair of magnets attached to the bottoms of a pair of windows which are suspended on a trolley for movement to or fro to determine closed and opened positions of the window. The device underneath the countertop comprises a pair of spaced toothed sprockets supporting an endless belt having inner and outer runs, the outer run supporting a magnet adapted to magnetically cooperate with a magnet in the bottom of one of the windows, and the other run of the belt supporting a different magnet adapted to attractively cooperate with a magnet in the bottom of the other window. A motor control and limit switches are provided for controlling the opening and closing positions of the windows when a control switch is operated by an operator. The belt has a plurality of apertures which, in conjunction with the teeth on the sprockets, prevent slippage and at the same time provide a means for adjustably positioning the magnets on the endless belt to thereby determine the size of the opening between the opened windows.
REFERENCES:
patent: 1232439 (1917-07-01), Spitzfaden
patent: 1508270 (1924-09-01), Connelly
patent: 1594513 (1926-08-01), Ainsworth
patent: 3346993 (1967-10-01), Johnson
patent: 3890744 (1975-06-01), Galis
patent: 4090265 (1978-05-01), Baus
Maks Richard
Radek John R.
Vestuto Russell
Kannan Philip C.
Ready Metal Manufacturing Company
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