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US 5,908,987 AGranted
Sensor employing a sliding ferrofluid mass in a coated, non-wetting, housing
AssigneeFerrofluidics Corporation
InventorKuldip Raj
Life of this patent
Estimating the term…
Abstract
A ferrofluid sensor assembly includes a closed housing containing a movable inductance core material that is isolated from the inner walls of the housing by an isolating material. The isolating material forms a layer between the inductance core material and the walls of the housing to prevent their contact. A detector also is included for detecting the position of the inductance core material within the housing.
Claims12
A ferrofluid sensor comprising:
- a closed housing having inner walls,
- an isolating material coating the inner walls of the housing;
- a movable ferrofluid within the housing, the isolating material forming a layer between the ferrofluid and the inner walls and preventing the ferrofluid from wetting the inner walls;
- and
- a detector for detecting a position of the ferrofluid within the housing.
2 more elements
A ferrofluid sensor comprising:
- a housing having inner walls;
- an isolating material coating the inner walls of the housing;
- a ferrofluid mass within the housing, the isolating material forming a layer between the ferrofluid mass and the inner walls of the housing and preventing ferrofluid in the ferrofluid mass from wetting the inner walls;
- and
- a detector for detecting the position of the ferrofluid mass within the housing.
2 more elements
Dependencies are inferred from the claim text.