Device for removing ice and/or snow from windowscreen wipers

Details Device for removing ice and/or snow from windowscreen wipers Device for removing ice and/or snow from windowscreen wipers

B - Operations, Transporting

60

S

B60S 1/04 (2006.01) B60S 1/34 (2006.01)

Patent

CA 2227242

A device (1) for removing ice and/or snow from windshield wipers, particularly for use on relatively heavy vehicles, of the type designed to lift the windshield wiper arm (20) such that the wiper blade (22) is brought out of contact with the vehicle window (23), and which thereafter causes the windshield wiper arm (20) to return to its original position so that the wiper blade (22) knocks against the window (23) and ice and/or snow is/are thereby caused to loosen from the wiper blade (22). The device (1) comprises a pneumatic cylinder (2) and a movable piston (5) within the cylinder. The cylinder (2) is divided into a high pressure chamber (9) and a low pressure chamber (10). The high pressure chamber (9) may optionally be placed under a higher pressure than the low pressure chamber (10), by means of a compressed air or a vacuum, in order to move the piston (5) in a first direction, causing the wiper arm (20) to lift away from the window (23). In the low pressure chamber (10) there is provided a return spring (12) which is designed to return the piston (5) in a second, opposite direction to allow the wiper arm (20) to move toward the window (23) when the pressure difference between the high pressure chamber (9) and the low pressure chamber (10) is annulled. The device (1) is adapted to be positioned such that it is operative between the vehicle body (21) or window (23) and the wiper arm (20).

L'invention porte sur un dispositif (1) permettant d'éliminer la glace et/ou la neige d'essuie-glaces, utilisable notamment, dans des véhicules relativement lourds. Ce dispositif est du type destiné à faire se relever le porte-balai d'essuie-glace (20), ce qui amène le balai d'essuie-glace (22) à se désolidariser du pare-brise du véhicule (23), le porte-balai d'essuie-glace (20) revenant ensuite à sa position première de sorte que le balai d'essuie-glace (22) heurte le pare-brise (23) et que, par le fait, la glace et/ou la neige s'en détachent. Le dispositif (1) comporte un cylindre pneumatique (2) et un piston (5) susceptible de se mouvoir dans ce cylindre, lui-même subdivisé en chambre haute pression (9) et chambre basse pression (10). La chambre haute pression (9) peut éventuellement se trouver à une pression supérieure à celle de la chambre basse pression (10) par compression d'air ou création d'une dépression, afin de faire se déplacer le piston (5) dans une première direction, ce qui amène le porte-balai d'essuie-glace (20) à s'éloigner du pare-brise (23). La chambre basse pression (10) est pourvue d'un ressort de rappel (12) destiné à faire revenir le piston (5) dans une seconde direction opposée afin de laisser le porte-balai d'essuie-glace (20) aller vers le pare-brise (23) lorsque il n'existe plus de différence de pression entre la chambre haute pression (9) et la chambre basse pression (10). Ce dispositif (1) est conçu pour se positionner de manière à fonctionner entre le corps (21) ou le pare-brise (23) du véhicule et le porte-balai (20).

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