Dart valve assembly for a bypass plunger
US9677389B2 · kind B2 · utility
18Cited by
5References
20Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Aug 24, 2016 |
| Grant date | Jun 13, 2017 |
| Priority date | — |
| Expiry date | Aug 24, 2036 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF04B53/12
- WIPO fieldEngines, pumps, turbines
- WIPO sectorMechanical engineering
Abstract
A dart valve assembly includes a dart valve and a clutch that restrains the movement of the dart valve within the bore of a dart valve cage or plunger body between a closed and an open position. The clutch includes a clutch bobbin formed of a synthetic material, and both the inside diameter of the clutch bobbin and the outside diameter of the dart valve stem of the dart valve assembly are configured with a sequence of alternating ridges and grooves to improve clutch action through reduced friction.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.