Bypass plunger
US9951591B2 · kind B2 · utility
1Cited by
38References
28Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Jul 10, 2015 |
| Grant date | Apr 24, 2018 |
| Priority date | — |
| Expiry date | Jul 31, 2036 |
Classification
- Technology area (CPC E)Fixed Constructions
- CPC primaryE21B43/121
- WIPO fieldCivil engineering
- WIPO sectorOther fields
Abstract
A minimum parts bypass plunger includes a main shaft or pushrod extending through a hollow plunger body that incorporates flow passages formed in the adjacent surfaces of the pushrod or the internal bore of the plunger body. The pushrod is retained within the plunger body by respective head and tail pieces or caps that are locked to the plunger body by 360 degree crimps around the head and tail pieces. A one piece clutch is supported in the head piece. The pushrod, has an integral valve head that closes the flow passages when seated against a seat in the plunger body.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.