Speed sensor assembly having a fluid seal carrier and piloting cup
US5570013A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Mar 15, 1993 |
| Grant date | Oct 29, 1996 |
| Priority date | — |
| Expiry date | Mar 15, 2013 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01P3/443
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A fluid seal is joined to a seal carrier, and a magneto-responsive sensor is coupled to a carrier to sense the polarities of a magnet borne on a rotatable shaft. The seal carrier, with the incorporated sensor, is arranged about the shaft, and leads from the sensor transmit an output signal voltage which corresponds to, or is proportional to the speed of rotation of the shaft. Depending upon the type of sensor employed, the signal voltage will be of repeatedly changing amplitude (i.e., pulsed or sine wave), or of given amplitude, in which the signal goes from zero to the given amplitude, to zero cyclically, or the sine wave amplitude/voltage increases with increasing speed, or pulse widths which diminish with speed acceleration.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.