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US 4,053,179 AGranted
Positioning means for a windshield wiper arm assembly
AssigneeCaterpillar Tractor Co.
InventorsStanley A. Jorgensen, Kenneth R. Myers
Life of this patent
Estimating the term…
Abstract
A windshield wiper arm assembly comprises a wiper arm having its lower end pivotally mounted on a bracket and a blade pivotally mounted on an upper end of the wiper arm. The bracket is secured on a motor-drive shaft for oscillation therewith. A leaf spring is secured to the upper end of the wiper arm to engage and bias the lower end of the blade towards the windshield. A stop member is secured on the shaft and positioned adjacent to an inboard side of the wiper arm to limit pivotal movement thereof towards the windshield.
Claims10
A windshield wiper arm assembly comprising
- a wiper arm adapted for mounting adjacent to a windshield, and adapted to receive a portion of a rock shaft for causing oscillation of said wiper arm about the axis of said rock shaft
- a blade pivotally mounted on an upper end of said wiper arm, said blade being pivotal around a pin means positioned so that the axis thereof is perpendicular to the axis of said rock shaft, and
- positioning means comprising spring means having a first end thereof secured to an upper end of said wiper arm and a second end thereof engaging a lower end of said blade directly for biasing said blade outwardly away from said wiper arm and toward said windshield and in a direction generally paralled to the axis of said rock shaft to maintain said blade at an acute angle relative thereto.
Dependencies are inferred from the claim text.