B - Operations – Transporting – 60 – S
Patent
B - Operations, Transporting
60
S
15/37
B60S 1/20 (2006.01) B60S 1/18 (2006.01) B60S 1/34 (2006.01)
Patent
CA 1066859
ABSTRACT OF THE DISCLOSURE A longitudinally adjustable lever in the form of a two piece housing mounted for oscillatory motion adjacent one end to the oscillating output of a wiper motor carries at its other end a pivot shaft adapted to receive a wiper arm. A crank arm is mounted on said lever for pivotal motion on an axis coaxial with the axis of the pivot shaft. Adjacent its free end the crank arm is adapted to have a drag link pivotally secured there- to. The free ends of the wiper arm and drag link are pivotally secured to opposite ends by a link element to form a parallelo- gram linkage. Enclosed within the housing which forms the lever is a rotatably adjustable stationary chain anchor, a sprocket fixed to the pivot shaft for rotation therewith and a drive chain looped around the sprocket extending between the chain anchor and the sprocket for effecting oscillatory movement of the arm pivot shaft relative to the lever when the lever is oscillating about an axis coaxial with the chain anchor. A gear train driven by the sprocket causes rotation of the crank arm relative to the pivot shaft so as to maintain substantially constant angular orientation of the crank arm relative to a fixed line. The lon- gitudinal axis of the drag link and the longitudinal axis of the wiper arm are maintained in parallel relationship so that a wiper blade secured to the end of the wiper arm will produce a sub- stantially rectangular wiping pattern. This is desirable for wi- ping a windshield which is extremely wide relative to its height.
262322
Papadatos Dionysios D.
Riester William C.
LandOfFree
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