Sensor of angle of a shaft with a base separating the shaft from a magnetoresistive sensing element
US6316935A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Jun 8, 1999 |
| Grant date | Nov 13, 2001 |
| Priority date | — |
| Expiry date | Jun 8, 2019 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF16D2500/5012
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A sensor for measurement of shaft angle values of a rotatable magnetized shaft employs a plurality of bridge circuits with corresponding magnetoresistive sensing elements disposed spaced-apart from a magnet disposed in an end of the shaft. The bridge circuits are held by a base which includes a cavity for receipt of the end of the shaft having the magnet. A housing secures the shaft and positions the shaft for rotation within the cavity. The base is formed of polybutalene teraphthallate which is permeable to magnetic lines of force, thereby permitting a coupling of the magnetic field of the shaft to the magnetoresistive sensors for measurement of an angle of the shaft about the shaft axis.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.