Abstract: This windmill head comprises a stub tower having a rotatable platform carrying a wind driven fan which drives a transmission mechanism. The mechanism has two cranks and pitman arms at opposite sides driving two rocking beams carrying counterweights. One beam is coupled to a vertical pump rod by non-rigid members to reciprocate the pump rod. The counterweights assist the beams in pulling up the pump rod and pumped load. A tail assembly tracks the wind by rotating the platform so that the fan faces the wind. The fan furls out of the wind when wind speed is excessive. A power unit may drive the transmission mechanism when wind speed is too low and high to drive the fan. The platform is carried by bearings which prevent vertical movement of the platform and components on it while the pump rod is being pulled up and pushed down, and while the counterweights are raised and lowered. The power unit can generate electric power when the wind speed is high enough to drive the fan.

Abstract: This gearless straight line drive mechanism has a first shaft driven by wind power or other power source. The shaft drives rotatable crank arms which reciprocate connecting rods carrying a horizontal second shaft. The second shaft moves up and down. It carries and extends through the centers of flat, symmetrical, vertical links. Pivotally mounted guide arms are connected to ends of the links to move them in opposite arcuate directions while the second shaft is constrained by the guide arms and links to move in a precisely vertical path. The second shaft carries a pump rod for cyclically operating a lift pump. The guide arms may carry counterbalance weights or the guide arms may be loaded by springs, which apply forces via the guide arms and links to cyclically assist the second shaft and pump rod in lifting a load.