Hand drilling
USRE30356E · kind E · reissue
4Cited by
15References
11Claims
0Family size
Inventors
Key dates
| Filing date | Jun 16, 1978 |
| Grant date | Aug 5, 1980 |
| Priority date | — |
| Expiry date | Jun 16, 1998 |
Classification
- Technology area (CPC —)General
Abstract
.Iadd.A hand drill includes an induction motor energized by a multi-phase electrical power source with the angle between consecutive phase maintained substantially constant over a wide frequency range by energizing logical circuitry comprising a number of flip-flops intercoupled by AND GATES. .Iaddend.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.