Reciprocating drive and reversing mechanism for long stroke, well pumping unit
Patent
·
OSTI ID:5612239
A yo-yo variety reversing mechanism is disclosed for long stroke, well pumping units, which employ a lift belt as the operative link between a winding drum and the polish rod of the well pump. Shock experienced between transfer from an upstroke to a downstroke is cushioned by the reversing mechanism or control which provides a power source off dwell period during the aforesaid stroke exchange. Further cushioning is provided by a novel winding drum for the lift belt which decreases the effective radius of the drum at the point of exchange from a downstroke to an upstroke to thus slow movement of the belt and cushion the shock of exchange from a downstroke to an upstroke.
- Assignee:
- EDB-84-004399
- Patent Number(s):
- US 4391155
- OSTI ID:
- 5612239
- Country of Publication:
- United States
- Language:
- English
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