Pump Jack Crank and Method
An apparatus for cranking a shackle of a pump jack. The apparatus includes a shaft which fits through the shackle. The apparatus includes an arm rotatably attached to the shaft in proximity to a first end of an arm. The apparatus includes a handle for cranking the shaft. The handle having a locked state in which the handle is unable to rotate the shaft, and an unlocked state in which the handle is able to rotate the shaft. The handle attached to the arm in proximity to a second end of the arm. The handle extending essentially perpendicularly from the arm. The apparatus includes a locking mechanism engaging the arm at a pivot point and the shaft, the locking mechanism placing the handle in the locked state or the unlocked state by moving the arm about the pivot point to a first position where the handle extends inward toward the shackle or a second position where the handle extends outward away from the shackle, respectively. A method for cranking a shackle of a pump jack.
1 . An apparatus for cranking a shackle of a pump jack comprising:
a shaft which fits through the shackle of the pump jack;
an arm rotatably attached to the shaft in proximity to a first end of an arm;
a handle for cranking the shaft, the handle having a locked state in which the handle is unable to rotate the shaft, and an unlocked state in which the handle is able to rotate the shaft, the handle attached to the arm in proximity to a second end of the arm, the handle extending essentially perpendicularly from the arm; and
a locking mechanism engaging the arm at a pivot point and the shaft, the locking mechanism placing the handle in the locked state or the unlocked state by moving the arm about the pivot point to a first position where the handle extends inward toward the shackle or a second position where the handle extends outward away from the shackle, respectively.
2 . An apparatus as described in claim 1 wherein the locking mechanism includes a plate having a plurality of teeth, attached to the shackle.
3 . An apparatus as described in claim 2 wherein the locking mechanism includes a pin which holds the arm to the shaft, the pin extending into the shaft and arm.
4 . An apparatus as described in claim 3 wherein the locking mechanism having an axis 1 corresponding to a long axis of the shaft, and an axis 2 which corresponds to a long axis of the pin, when the handle is rotated about the axis 1 , the handle causes the shaft to rotate with the handle, when the handle is turned about the axis 2 , the shaft does not rotate.
5 . An apparatus as described in claim 4 wherein the locking mechanism includes a spacer, a spring, and a collar that are a sliding fit over the shaft.
6 . A method for cranking a shackle of a pump jack comprising the steps of:
placing a handle for cranking a shaft that extends through the shackle of the pump jack in an unlocked state where the handle extends outward away from the shackle by moving the handle about a pivot point from a locked state where a locking mechanism engages an arm that extends from the shaft and the handle extends essentially perpendicularly from the arm and where the handle extends inward toward the shackle; and
rotating the handle about an axis of the shaft to rotate the shaft.