Is a
Patent attributes
Current Assignee
Patent Jurisdiction
Patent Number
Date of Patent
February 8, 2011
Patent Application Number
11122360
Date Filed
May 5, 2005
Patent Citations Received
Patent Primary Examiner
Patent abstract
An apparatus for cranking a shackle of a pump jack. The apparatus includes a shaft which fits through the shackle. 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 apparatus includes a locking mechanism engaging the handle at a pivot point and the shaft, the locking mechanism placing the handle in the lock state or the unlocked state by moving the handle about the pivot point to a first position or a second position, respectively. A method for cranking a shackle of a pump jack.
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