Patent ID: 7260903
Filing Date: 2007-08-28
Classification: E02F

Abstract:
1. An ejector mechanism for a back hoe excavator bucket, having two sides with inner and outer surfaces interconnected by a curvilinear back having upper and lower edges to define a forwardly opening bucket chamber, said excavator bucket mounted on bucket support linkage having a bucket support arm and bucket pivoting mechanism for pivotal motion of the excavator bucket between an excavating position and a dumping position, comprising in combination: an ejector arm shaft having opposed end portions pivotally carried in horizontal orientation in the bucket chamber adjacent the inner surface of the excavator bucket back by the excavator bucket sides, said ejector arm shaft irrotatably carrying at each lateral end portion a powering arm ramp carried by the bucket support linkage with an upwardly and forwardly angulated ramp to receive the forward portion of the powering arm for motion along the powering ramp to pivot the powering arm responsive to pivotal motion of the excavator bucket between a vertical digging position and a horizontal dumping position to responsively pivot the ejector arm shaft to move the curvilinear ejector arms between a position adjacent the excavator bucket back to a position distal therefrom, and spring means biasing the ejector arm shaft to a position whereat the curvilinear ejector arms are adjacent the bucket back when the ejector bucket is substantially empty.