Connection between the equalizer beam and the walking beam of a walking beam type oil well pumping unit
US4727760A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Sep 19, 1986 |
| Grant date | Mar 1, 1988 |
| Priority date | — |
| Expiry date | Sep 19, 2006 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T403/32877
- WIPO fieldEngines, pumps, turbines
- WIPO sectorMechanical engineering
Abstract
The invention is directed to a connection between the equalizer beam and the walking beam in a walking beam type oil well pumping unit, the walking beam having a tail shaft rotatably mounted generally perpendicular to the longitudinal axis of the beam. The connection comprises an equalizer beam and two support members spaced from one another lengthwise of the equalizer beam and rigidly secured to the beam, each support member having an arm extending outwardly toward the other support member, and each arm having a curved downwardly-facing bearing surfaces adapted to be engaged by a respective end of the tail shaft. A retainer associated with each support member holds its respective end of the tail shaft in engagement with the downwardly-facing bearing surface when forces tending to separate the shaft from the bearing surface are applied to the shaft.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.