Pump jack centering roller system
US11459777B2 · kind B2 · utility
0Cited by
9References
20Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Jul 25, 2019 |
| Grant date | Oct 4, 2022 |
| Priority date | — |
| Expiry date | Dec 26, 2040 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA63B2209/00
- WIPO fieldCivil engineering
- WIPO sectorOther fields
Abstract
A roller system including a top roller, a middle roller, a split lower roller and a split workbench roller configured for a pump jack arranged for travelling up and down a pole, wherein the top roller includes flanges at both ends of the roller; wherein the split lower roller includes a pair of facing lower rollers, each of the pair of facing lower rollers having an outward tapered flange; and wherein the split workbench roller includes a pair of facing workbench rollers, each of the pair of facing workbench rollers having an outward tapered flange.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.