High reach attachment for loader

Claim 2

A lifting apparatus for extending the elevation and reach of a tractor hydraulically actuated lifting boom and tool, comprising a hydraulically actuated rear lever arm pivotally attached to said boom; a forwardly projecting lifting bar pivotally connected to said lever arm and having a downward bend near its forward end; a forward lever arm pivotally connected between said lifting boom and said lifting bar near the downward bend region, said forward lever arm extending upwardly beyond its connection with the lifting bar and having a pivot pin connection at its extended end; means for pivotally connecting the tool to said lifting bar forward end; and means for pivotally connecting said tool to said forward lever arm extended end.

Claim 3

Apparatus as claimed in claim 1, wherein said means for pivotally connecting said tool to said forward lever arm extended end includes a hydraulic jack operable to tilt the tool about the pivotal connection of the latter to the lifting bar forward end.

Claim 4

Apparatus as claimed in claim 2 wherein the forward lever arm pivotally connected between said hydraulic lifting boom and said lifting bar is connected to the forward extremity of said lifting boom.

Claim 5

Apparatus as claimed in claim 3 wherein said hydraulically actuated rear lever arm further comprises a lever having pivot pin connections at each of its ends and at a point intermediate the ends, said intermediate pivot pin connection being attached to a hydraulic jack extendible rod, one of said end pivot connections being attached to said boom, and the other of said end pivot connections being attached to said lifting bar.

Claim 6

Apparatus as claimed in claim 4 wherein said connection between the rear lever end pivot connection and the lifting bar is made at the rearmost end of said lifting bar.

Claim 7

A lifting apparatus for extending the elevation and reach of a tractor hydraulic lifting mechanism including a boom which can be raised at its forward end and is pivotally connected to the tractor frame at its rearward end, comprising: a hydraulic jack pivotally connected to said tractor frame at a point near said boom pivotal connection, and having an extendible rod projecting forwardly along said boom; a rear lever arm having pivot pin connections at each of its ends and at a point intermediate the ends, said intermediate pivot pin connection being attached to the extendible hydraulic jack rod and one of said end pivot connections being attached to said boom; a forwardly projecting lifting bar having a downward bend near its forward end and having a pivotal connection at its rearward end for connection to one of said rear lEver arm pivot pin end connections, said lifting bar having a pivot pin connection near the point of downward bend, and having a pivotal connection at its forward and downward extremity for attachment to a tool; a forward lever arm having pivot pin connections at each of its ends and at a point intermediate the ends, said intermediate pivot pin connection being attached to the lifting bar pivot pin connection near the point of downward bend, and having one of said end pivot pin connections attached to the forward end of said tractor boom; a hydraulic jack connected at one of its ends to said forward lever arm other pivot pin end connection, and having an extendible rod for connection to a tool; whereby a tool connected between said hydraulic jack extendible rod and said lifting bar forward end will be pivotal about said forward end under control of said hydraulic jack.

Claim 8

A lifting apparatus for extending the elevation and reach of a tractor hydraulic lifting mechanism including a boom which can be raised at its forward end and is pivotally connected to the tractor frame at its rearward end, comprising: a hydraulic jack pivotally connected to said tractor frame at a point near said boom pivotal connection, and having an extendible rod projecting forwardly along said boom; a rear lever arm having pivot pin connections at each of its ends and at a point intermediate the ends, said intermediate pivot pin connection being attached to the extendible hydraulic jack rod and one of said end pivot connections being attached to said boom; a forwardly projecting lifting bar having a downward bend near its forward end and having a pivotal connection at its rearward end for connection to one of said rear lEver arm pivot pin end connections, said lifting bar having a pivot pin connection near the point of downward bend, and having a pivotal connection at its forward and downward extremity for attachment to a tool; a forward lever arm having pivot pin connections at each of its ends and at a point intermediate the ends, said intermediate pivot pin connection being attached to the lifting bar pivot pin connection near the point of downward bend, and having one of said end pivot pin connections attached to the forward end of said tractor boom; a hydraulic jack connected at one of its ends to said forward lever arm other pivot pin end connection, and having an extendible rod for connection to a tool; whereby a tool connected between said hydraulic jack extendible rod and said lifting bar forward end will be pivotal about said forward end under control of said hydraulic jack.