US 5,511,932 AGranted

Skid steer loader boom control system

AssigneeNew Holland North America, Inc.

InventorsRobert R. Todd, Dale A. Ashcroft

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Abstract

A skid steer loader having a main frame including a compartment in which an engine and transmission components are contained, ground support wheels extending from the main frame, and a cab mounted on the main frame. The cab includes load bearing side walls extending upwardly from the main frame to define an operators control area therebetween. A boom assembly comprising a pair of arms having material handling front portions and linkage structure that operatively attaches the arms to the cab side walls. The linkage structure includes an upper link coupled to each of the arms and pivotally secured to the cab at a location above the top surface of the wheels, and a lower link which is also pivotally secured to the cab at a location above the wheels. The boom assembly raises and lowers the pair of arms through a generally vertical path adjacent the corresponding load bearing side walls and above the wheels which maximizes the space available in the operator control area, whereas the front portions of the boom arms are thereby moved along generally vertical side-by-side paths.

Claims8

Dependent claims

A skid steer loader comprising

a main frame including a compartment in which an engine and transmission components are contained,
ground support wheels extending from said main frame,
a cab mounted in its operative position above said compartment on said main frame, said cab including load bearing side walls extending upwardly from said main frame to define an operators control area therebetween,
a boom assembly comprising a pair of arms and linkage structure for operatively attaching said pair of arms to said load bearing side walls,
each of said arms including a front portion having a front end, for supporting material handling means, extending beyond said cab, a rear portion extending behind said cab, and an integral intermediate portion between said front and rear portions,
said linkage structure including a pair of upper links, means for pivotally coupling one end of each of said upper links to said rear portion of each of said arms, means for pivotally attaching the other end of each of said upper links to said cab at a location above said wheels, a pair of lower links, means for pivotally coupling one end of each of said lower links to said rear portion of each of said arms, and means for pivotally attaching the other end of each of said lower links to said cab at a location above said wheels, and
power means operatively associated with said boom assembly for raising and lowering in concert each of said pair of arms through a generally vertical path adjacent its corresponding load bearing side wall to which it is attached, whereby said front end of said boom arms travel along generally vertical side-by-side paths.

4 more elements

Dependencies are inferred from the claim text.