Oscillator actuated hydraulic impulse device
US4342255A · kind A · utility
11Cited by
5References
6Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Oct 30, 1980 |
| Grant date | Aug 3, 1982 |
| Priority date | — |
| Expiry date | Oct 30, 2000 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF03C1/20
- WIPO fieldEngines, pumps, turbines
- WIPO sectorMechanical engineering
Abstract
An oscillator actuated hydraulic impulse of the type including a spool valve actuated by an alternating signal from an oscillator to switch the hydraulic pressure in a double acting cylinder in order to cause reciprocating motion of a piston which strikes a boring tool. The hydraulic impulse device further includes a means for controlling the transition from the impulse stroke to the return stroke of the piston. In some embodiments, the hydraulic impulse device may further include a means for varying the duration of the impulse stroke and the return stroke of the piston.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.