A wiper assembly

Details A wiper assembly A wiper assembly

B - Operations, Transporting

60

S

B60S 1/44 (2006.01) B60S 1/04 (2006.01) B60S 1/34 (2006.01)

Patent

CA 2199240

Various embodiments of a wiper assembly are disclosed which facilitate the removal or shattering of ice or snow debris lodged and trapped beneath a wiper blade during its movement. Embodiments of the invention are disclosed which provide means to overcome normal urging forces of the wiper arm in a direction towards a light transmitting screen member and to urge the wiper arm of the wiper assembly away from the surface of the screen member. Some structures according to the invention may cause the wiper blade to return with an impact force sufficient to break ice and snow debris trapped beneath the wiper blade and also possibly frozen to it. Other embodiments include means for imparting vibrational movement to the wiper assembly to release or shatter ice and snow trapped beneath the blade or frozen to it.

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