The Anderson Company

Robert O Wittwer

Michael G Mohnach

William H Harbison

A fine angular adjustment is provided between a windshield wiper arm and a windshield wiper drive shaft without changing the standard drumhead or drive burr carried by said drive shaft. Provision is made for fine adjusting the angular orientation of the arm by increments of one degree. In two embodiments, the mounting head of the arm is in two parts with the first part fixed to the drumhead of the drive shaft and the second part having incremental teeth being spring urged into contact with mating incremental teeth on the first part, such that actuating the spring separates said incremental teeth of the two parts making it possible to rotate the second part relative to the first part in approximately one degree increments. Another embodiment provides for offset openings in the mounting head with flutes in each opening being offset from a centerline a predetermined amount such that assembly of the mounting head on a drumhead in one or the other of said openings will provide the arm with one degree increments of orientation.

Finer adjustment windshield arm mounting head

A wiper blade is provided with a silent connection between two of the articulated parts thereof. The one part may be made of metal and has an inverted U-shape in cross section with flared lower edge portions at the outer connecting ends of said part. Aligned openings are formed in the side walls of the connecting ends of the metal part with said openings being in vertical alignment with said flared edge portions. A plastic part is pivotally attached to said metal part by means of a pair of aligned outwardly projecting lugs engaging in said openings in said first part. The top edges of the lugs are tapered outwardly. A vertical opening or slot is formed in said plastic part between said lugs to permit the lugs to deflect inwardly as the metal part is urged past the lugs and into articulating relationship when the lugs snap into said openings. An improved method of molding the secondary yokes using a two-piece mold and core pins is included that results in a less expensive but more efficient plastic part such as a secondary yoke.

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Portage, IN, United States of America

Robert O Wittwer