High dump bucket linkage

Claim 2

In an end loader having a body, lift arms pivotally mounted on the body and a material handling bucket supported on the lift arms, the improvement comprising a mounting for the bucket having a lower means pivotally supporting the bucket adjacent its cutting edge and upper link means comprising a first link pivoted at its lower end to a portion of said lower means extending upwardly near the top of the bucket and projecting upwardly therefrom, a second link pivoted one one end to the first link at its upper end and to the bucket near the upper rear edge thereof on its lower end, the lower ends of the links being closely adjacent when the bucket is tilted rearwardly on said pivot adjacent the cutting edge, and an actuating cylinder mounted between said links forming a triangle with two sides formed by said first link and cylinder and the third by a portion of the second link not greater than half its length, said bucket being tilted outwardly about said pivot adjacent the cutting edge by actuation of the cylinder causing said first and second links to spread out their lower ends above the bucket such that the lower end of said second link has a forward reach substantially above the pivot of the bucket adjacent its cutting edge.

Claim 3

The improvement according to claim 1 wherein the lower means is a pair of links having leg portions extending below the bucket pivoted at their outer ends adjacent the cutting edge and at their rear ends to the lift arms and a cylinder connected between the lift arms and said pair of links providing tilt and roll-back bucket movement about the rear ends of said pair of links.

Claim 4

The improvement according to claim 2 wherein the upper link means comprise a pair of first and second links on each side of the bucket, the first being pivoted on its upper end to the second and being of substantially the same length as the second and the cylinder being pivotally connected on the second link closely adjacent the first.

Claim 5

The improvement according to claim 3 wherein said lower pair of links each has an upwardly extending leg portion behind the bucket and the first of each said upper pair of links being pivoted at its lower end adjacent the said leg portion.

Claim 6

An end loader having a body, a pair of lift arms pivoted to uprights at the rear of the body and extending forwardly alongside the operator''s compartment and downwardly at the front of the loader in the lowered position of the arms, a bucket mounting linkage, a bucket manipulated on the ends of the lift arms mounted on said linkage, said linkage including a lower link with a long, forwardly extended leg portion extending below the bucket and pivoted at the outer end adjacent the cutting edge of the bucket, an upwardly extending shorter leg portion behind the bucket joined to the long leg portion, channels formed in the bottom and back walls of the bucket for receiving said leg portions, a first upper link pivoted at it''s lower end to an upper portion of said shorter leg, a second upper link pivoted at the upper end of the first upper link and to the upper edge of the bucket adjacent the lower end of the first upper link and a cylinder extending between the first and second upper links forming a triangle with two sides being the first upper link and cylinder and the third side being a short portion of the second upper link whereby the upper links are effectively extended to the end of the long forwardly extending leg portion of said lower link.

Claim 7

An end loader having a body, a pair of lift arms pivoted to uprights at the rear of the body and extending forwardly alongside the operator''s compartment and downwardly at the front of the loader in the lowered position of the arms, a bucket mounting linkage, a bucket manipulated on the ends of the lift arms mounted on said linkage, said linkage including a lower link with a long, forwardly extended leg portion extending below the bucket and pivoted at the outer end adjacent the cutting edge of the bucket, an upwardly extending shorter leg portion behind the bucket joined to the long leg portion, channels formed in the bottom and back walls of the bucket for receiving said leg portions, a first upper link pivoted at it''s lower end to an upper portion of said shorter leg, a second upper link pivoted at the upper end of the first upper link and to the upper edge of the bucket adjacent the lower end of the first upper link and a cylinder extending between the first and second upper links forming a triangle with two sides being the first upper link and cylinder and the third side being a short portion of the second upper link whereby the upper links are effectively extended to the end of the long forwardly extending leg portion of said lower link.