Solenoid valve with permanent magnet

F - Mech Eng,Light,Heat,Weapons – 16 – K

Patent

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Details

F16K 31/08 (2006.01)

Patent

CA 2304330

A solenoid valve (10) having a coil (35), a plunger (42), at least a first and a second opening and a permanent magnet (72, 154) placed in association with the first opening, the permanent magnet (72, 154) serving to bias the plunger (42) towards the first opening, and the coil (35) is operable to reduce, cancel out, or reverse the bias towards the first opening and to pull the plunger (42) towards the second opening. One variant has the permanent magnet (72) placed on the upper housing (70) around the first opening. A second variant has the permanent magnet (154) placed on the plunger (42) and a second coil (178) on the upper housing (170). The second coil (178) is excitable in either of two directions, in one direction to attract the permanent magnet (154) and in the other direction to repel the permanent magnet (154).

L'invention concerne une électrovanne comprenant une bobine, un poussoir, au moins une première et une deuxième ouvertures et un aimant permanent associé à la première ouverture, ledit aimant permanent servant à solliciter le poussoir vers la première ouverture et, lorsque la bobine fonctionne, à réduire, à neutraliser ou à inverser le mouvement du poussoir vers la première ouverture et à attirer ledit poussoir vers la deuxième ouverture. Dans une variante, l'aimant permanent est placé sur le boîtier supérieur entourant la première ouverture. Dans une autre variante, l'aimant permanent est placé sur le poussoir, une deuxième bobine étant disposée sur le boîtier supérieur. La deuxième bobine peut être excitée dans deux directions, à savoir dans une direction pour attirer l'aimant permanent et dans l'autre direction pour repousser ledit aimant permanent.

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