Machine element or mechanism – Mechanical movements – Rotary to or from reciprocating or oscillating
Patent
1981-08-11
1984-08-21
Staab, Lawrence J.
Machine element or mechanism
Mechanical movements
Rotary to or from reciprocating or oscillating
74108, F04B 4702
Patent
active
044663013
ABSTRACT:
A low profile pumpjack unit for producing fluid from a borehole. The pumpjack unit has a main frame supported below ground level. An upright Sampson post is supported by the main frame. A walking beam is journaled to the upper end of the Sampson post. A pitman arm is connected to and drives one end of the walking beam, while a horsehead is attached to the other end. The horsehead has a pair of curved tracks formed on the outermost surface thereof, each of which describes a segment of a circle, with the circle having a radius drawn from the Sampson post journal. The segment has a diagonal which is slightly shorter than the length of the stroke imparted into the sucker rod. The tracks abruptly curve at each end thereof to form the upper and lower ends of the horsehead. A cable bridle is received by an inside part of the horsehead, with the marginal ends of the bridle being maintained in aligned relationship respective to the two tracks which form the aforesaid circumference. The low profile of the pumpjack unit enables it to be maintained at a very low elevation which is easily hidden from view, and enables traveling irrigation systems to drive over the pumpjack unit.
REFERENCES:
patent: 689147 (1901-12-01), Vogt
patent: 1307243 (1919-06-01), Cousins
patent: 1612886 (1927-01-01), Sams
patent: 2071437 (1937-02-01), Searle
patent: 2286153 (1942-06-01), Nicolescu
patent: 2456531 (1948-12-01), Patterson
patent: 2515360 (1950-07-01), Vail
patent: 2877652 (1959-03-01), Muschalek
patent: 4092872 (1978-06-01), McClure
Bates Marcus L.
Staab Lawrence J.
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