Reciprocating drive and reversing mechanism for long stroke, wel

Machine element or mechanism – Mechanical movements – Reciprocating or oscillating to or from alternating rotary

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Details

417 44, F16H 2702, F16H 2902, F04B 4706

Patent

active

043911552

ABSTRACT:
A yo-yo variety reversing mechanism 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.

REFERENCES:
patent: 1970596 (1934-08-01), Coberly
patent: 3248958 (1966-05-01), Bender
patent: 3345950 (1967-10-01), Bender
patent: 3483828 (1969-12-01), Bender
patent: 3777491 (1973-12-01), Bender
patent: 3868820 (1975-03-01), Lawson
patent: 4179947 (1979-12-01), James

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