Patent ID: 8087731
Filing Date: 2012-01-03
Classification: B60P

Abstract:
1. In combination: a wheeled frame means having a rearward end, a forward end, and first and second sides; a first upstanding support having upper and lower ends; said first support being operatively secured at its said lower end to said frame means and extending upwardly therefrom; a second upstanding support having upper and lower ends; said second support being operatively secured at its said lower end to said frame means and extending upwardly therefrom in a spaced-apart relationship with respect to said support; a first, generally upstanding, pivot arm having upper and lower ends; said first pivot arm being pivotally secured intermediate its upper and lower ends to said first support adjacent said upper end thereof about a horizontal axis; a second, generally upstanding, pivot arm having upper and lower ends; said second pivot arm being pivotally secured intermediate its upper and lower ends to said second support adjacent said upper end thereof, about a horizontal axis; a first hydraulic cylinder having a base end and a rod end; said base end of said first hydraulic cylinder being pivotally secured to said first support adjacent said lower end thereof about a horizontal axis; said rod end of said first hydraulic cylinder being pivotally secured to said back wall of said side dump body about a horizontal axis; a second hydraulic cylinder having a base end and a rod end; said base end of said second hydraulic cylinder being pivotally secured to said second support adjacent said lower end thereof about a horizontal axis; said rod end of said second hydraulic cylinder being pivotally secured to said front wall of said dump body about a horizontal axis; a dump body positioned between said first and second pivot arms and being movable from a transport position to a first dumping stage, a second dumping stage and a complete dumping stage; said dump body including a front wall, a back wall, a bottom wall, and first and second side walls; said upper end of said first pivot arm being pivotally secured, about a horizontal axis, to said back wall of said dump body; said upper end of said second pivot arm being pivotally secured, about a horizontal axis, to said front wall of said dump body; a third hydraulic cylinder having a base end and a rod end; said rod end of said third hydraulic cylinder being pivotally secured to said first pivot arm above said lower end thereof about a horizontal axis; said base end of said third hydraulic cylinder being pivotally secured to said first support below said upper end thereof about a horizontal axis; a fourth hydraulic cylinder having a base end and a rod end; said rod end of said fourth hydraulic cylinder being pivotally secured to said second pivot arm above said lower end thereof about a horizontal axis; said base end of said fourth hydraulic cylinder being pivotally secured to said second support below said upper end thereof about a horizontal axis; said first, second, third and fourth cylinders being movable between retracted and extended positions; said first, second, third and fourth cylinders being in their retracted positions when said dump body is in its said transport position; the extension of said first and second cylinders causing said dump body to be pivotally moved to a first dumping stage; the extension of said third and fourth cylinders, when said dump body is in its said first dumping stage, causing said dump body to be pivotally moved to a second dumping stage; the retraction of said third and fourth cylinders, when said dump body is in its said second dumping stage, causing said dump body to be pivotally moved to a complete dumping stage; the retraction of said first and second cylinders, when said dump body is in its said complete dumping stage, causing said dump body to be pivotally moved to said transport position.