Machine element or mechanism – Mechanical movements – Rotary to or from reciprocating or oscillating
Patent
1985-01-22
1987-08-04
Staab, Lawrence
Machine element or mechanism
Mechanical movements
Rotary to or from reciprocating or oscillating
74522, F04B 4702
Patent
active
046837647
ABSTRACT:
A tiltable horse-head shaped transmission part at the end of a rocking beam of a cornish type pump drive, is pivotably supported at one end portion of the rocking beam. The rocking beam is pivotably supported on a stationary stand. The horse-head transmission part is mounted in bearing blocks which are shiftable in longitudinal direction of the rocking beam and at the same time are tiltable about an axis which extends parallel to the longitudinal direction of the rocking beam. In this manner an accurate adjustment of the horse-head transmission part relative to a polished rod in the bore hole is made possible so that the polished rod can be accurately guided in corresponding stuffing boxes. The horse-head shaped transmission part is provided with two force application points serving for introducing tilting movement in a backward direction toward a stand and in a forward direction away from the bore hole. The force application points are equipped with fastening means for the attachment of a pulling rope. The arrangement of the force application points relative to the center of gravity of the transmission part and to its pivot axle is such that during the tilting movement of the horse-head transmission part in either direction, its center of gravity passes its upper dead center point before the force application point being used reaches its top dead center.
REFERENCES:
patent: 1751767 (1930-03-01), Sperry
patent: 1885675 (1932-11-01), Black
patent: 1912246 (1933-05-01), Barrett
patent: 2079276 (1937-05-01), Bloss
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patent: 2287604 (1942-06-01), Comstock
patent: 3029650 (1962-04-01), Byrd
patent: 4092872 (1978-06-01), McClure
Brauch Hans-Joachim
Neuhauser Johannn
Salzgitter Maschinen und Anlagen Aktiengesellschaft
Staab Lawrence
Striker Michael J.
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