Fluid pump control system for a tractor

Claim 1

A fluid pump control for a tractor having a controlled fluid pump, comprising a pivotally mounted control member maneuverable by the operator, a force-responsive member pivotally mounted and operatively associable with said pump for setting said pump in variable selectable positions of operation including a neutral position, each of said members having two oppositely extending movable ends, two compression springs disposed intermediate said members to have one spring respectively intermediate each respective two of said movable ends, four connectors spearately operatively associated between respective ones of the four of said movable ends and respective ones of said springs at effective opposite ends of each of said springs for transmitting movement of said members toward each other only through said springs, a fixed stop disposed off one end of each of said springs for limiting movement of each of said springs beyond said one stop, a movable abutment disposed at the other end of each of said springs to operatively relate with said springs and being freely movable relative to each other, said springs being disposed between said stop and abutment and being the only elements between said stop and abutment to yieldingly urge said abutment away from said stop, each said abutment being respectively connected with said connectors to have said springs apply force on said two connectors connected with said force-responsive member operatively associated with said pump and thereby position the latter said member in one of said variable selectable positions and later return to a pump neutral position after release of the control member.