Unibody bypass plunger and valve cage with sealable ports
US11578570B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | May 17, 2022 |
| Grant date | Feb 14, 2023 |
| Priority date | — |
| Expiry date | May 17, 2042 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T137/7855
- WIPO fieldCivil engineering
- WIPO sectorOther fields
Abstract
A bypass plunger includes a unibody, or one-piece hollow body and valve cage, retains a dart valve within the valve cage portion using a threaded retaining nut secured by crimple detents, and includes sealable flow parts. A series of helical grooves surround the central portion of the outer surface of the hollow body of the plunger to control spin during descent. A canted-coil-spring disposed within the retaining nut functions as a clutch. The valve cage includes ports that may be configured to control flow through the plunger during descent. Other embodiments include clutch assemblies using canted-coil springs with split bobbins, and surfaced valve stems surfaced.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.