Sucker rod shock absorber
US4354397A · kind A · utility
Inventor
Key dates
| Filing date | May 9, 1980 |
| Grant date | Oct 19, 1982 |
| Priority date | — |
| Expiry date | May 9, 2000 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T74/2146
- WIPO fieldEngines, pumps, turbines
- WIPO sectorMechanical engineering
Abstract
A shock absorber apparatus connected in series relationship respective to the polished rod and bridle of a pumpjack unit. The shock absorber includes a housing within which there is supported a plurality of resilient packer members stacked in sandwiched relationship. The packer members have an axial passageway formed therethrough, with the passageway of each packer member being aligned with one another, so that the polished rod is telescopingly received therethrough. The bottom of the housing is supported by the bridle, while the polished rod is supported by a plate member which bears against the uppermost packer member. This places all of the resilient packer members in compression, with the force of the compression being proportional to the weight of the sucker rod.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.