Tone wheel for rotational speed detection unit
US5551291A · kind A · utility
7Cited by
2References
1Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Mar 8, 1995 |
| Grant date | Sep 3, 1996 |
| Priority date | — |
| Expiry date | Mar 8, 2015 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01P3/487
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A tone wheel made by press-forming a magnetic metal plate, has an annular portion and a plurality of fingers which are arranged in comb teeth fashion on an outer peripheral rim of the annular portion, and formed by bending beck the magnetic metal plate through 180 degrees so as to be overlapped as two layers, so that there is a large change in magnetic flux density as the tone wheel rotates past an opposing sensor, thereby increasing the amount of change in the sensor output signal.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.