Pressure activated switching device with piezoresistive material

Details Pressure activated switching device with piezoresistive material Pressure activated switching device with piezoresistive material

1997-10-29

1999-03-23

Tolin, Gerald

Electrical resistors

Mechanically variable

Deformable

200 86R, 340666, 428209, 428465, H01H 1316

Patent

active

058866159

ABSTRACT:
A pressure sensitive sparkless switching device includes a layer of piezoresistive cellular polymer foam, at least two conductive layers, and an insulative spacer element having at least one opening. When pressure is applied to the device the piezoresistive foam disposes itself through the opening of the spacer element and makes electrical contact between the conductive layers. The resistance of the piezoresistive foam varies with the amount of pressure applied to provide an analog as well as on-off function. The device may also provide multiple switching, and shear detection capabilities.

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