Impact tool for a hammer device and method for opening a tapping opening
US9347709B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Sep 26, 2012 |
| Grant date | May 24, 2016 |
| Priority date | — |
| Expiry date | Sep 19, 2034 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF27D3/1536
- WIPO fieldThermal processes and apparatus
- WIPO sectorMechanical engineering
Abstract
Impact tool and method for a hammer device that includes impact tool housing and tubular piston structured and arranged for axial displacement in impact tool housing via pressure medium. Tubular piston has essentially radial pressure surfaces structured and arranged on opposite portions of tubular piston to be acted on with pressure medium. Grooves are formed in impact tool housing that are structured and arranged for a reversal of a direction of a pressure medium impingement on pressure surfaces and discharge or recirculation of medium. Grooves include a control recess formed in tubular piston and at least two control grooves for a shift of pressure medium impingement on pressure surfaces that are arranged axially offset in impact tool housing. A controller is structured and arranged to alternatively activate one of the at least two control grooves via connection channels.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.