Patent ID: 8166604

Claim:
A vehicle comprising: a frame; a locomotion source supported to the frame for use in providing locomotion for the vehicle; a wiping surface supported to the frame; a wiper assembly comprising: (1) a motion generating device that is supported to the frame; (2) an arm that is operatively connected to the motion generating device and that is pivotal about a pullback pivot axis; (3) a blade assembly that is removably attachable to the arm; that comprises a blade having a contact surface; and, that is pivotally attached to the arm about a blade pivot axis by attachment means; a wiper lifter that is juxtaposed to the wiping surface; wherein the wiper assembly is positional into: (1) a first condition wherein: the pivot motion generating device pivots the arm; and, the blade contact surface contacts the wiping surface; (2) a second condition wherein the blade assembly contacts the wiper lifter to lift the blade away from the wiping surface; (3) a third condition wherein: the arm is pivoted away from the wiping surface about the pullback pivot axis to a pullback angle; and, the blade assembly is irremovable from the arm by retention of the attachment means due to physical interference between the wiper assembly and the wiper lifter when the blade assembly is pivoted about the blade pivot axis; and, (4) a fourth condition wherein: the arm is pivoted away from the wiping surface about the pullback pivot axis to the pullback angle; the blade assembly is moved substantially parallel to the pullback pivot axis; and, the blade assembly is removable from the arm by release of the attachment means without physical interference between the wiper assembly and the wiper lifter when the blade assembly is pivoted about the blade pivot axis.