Machine element or mechanism – Mechanical movements – Rotary to or from reciprocating or oscillating
Patent
1981-04-02
1985-03-05
Staab, Lawrence J.
Machine element or mechanism
Mechanical movements
Rotary to or from reciprocating or oscillating
74411, F04B 4702
Patent
active
045023433
ABSTRACT:
A pump jack having a resiliently mounted speed reducer. The pump jack comprises a frame, a sampson post, and a walking beam pivotally mounted on the sampson post. Crank shaft bearings are securely mounted on the sampson post. A speed reducer is resiliently mounted to the sampson post and coupled to the crank shaft extending through the crank shaft bearings. Thus, non-torsional forces are transferred to the sampson post, reducing wear on the speed reducer and obviating the necessity of a speed reducer of large size. This results in decreased power necessary to run the pump jack. This also allows the use of a single pitman rod configuration, which is subject to less wear than previous double pitman configurations.
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Standard Products Catalogue of Morse Division of Borg-Warner, SP80, 1981, pp. F-14 and F-15.
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