Punch mechanism
US11499400B2 · kind B2 · utility
Inventors
Key dates
| Filing date | Jun 12, 2019 |
| Grant date | Nov 15, 2022 |
| Priority date | — |
| Expiry date | Jun 12, 2039 |
Classification
- Technology area (CPC E)Fixed Constructions
- CPC primaryE21B43/112
- WIPO fieldCivil engineering
- WIPO sectorOther fields
Abstract
An apparatus for punching holes in a casing comprises an elongate casing extending between first and second ends having a plurality of punches adapted to be selectably extended therefrom, the casing having a piston cavity therein, the first end of the casing being in fluidic communication with a pressurized fluid source, a slidable piston contained within the cavity separating the cavity into extension and retraction cavities wherein the extension cavity is operable to pressurize a rear surface of the plurality of punches and the retraction cavity is operable to pressurize a front surface of the plurality of punches and a valve assembly adapted to selectably connect the pressurized fluid source with the extension or retraction cavities so as to extend or retract the punches.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.