Patent ID: 7287712
Filing Date: 2007-10-30
Classification: B05B,Y10T

Abstract:
1. An oscillating sprinkler unit, comprising: a sprinkler head mounted for rotation and including arc control contact elements for controlling an arc of oscillation of the sprinkler; and a drive assembly including: at least one rotating driver for driving said sprinkler head in alternate directions, a shiftable carrier for engaging alternate driving positions with the at least one rotating driver, a shifting arm movable by the arc control elements for alternately shifting the shiftable carrier between the driving positions, and a biasing mechanism for retaining the shiftable carrier in a selected one of said driving positions until the shiftable carrier is shifted to the other driving position by said shifting arm, wherein said biasing mechanism is comprised of a cam and a follower engageable with said cam on opposite sides of a center position for biasing and retaining said carrier in a selected one of said alternately engageable positions.