Patent ID: 8511512

Claim:
A dispenser that controls dispensation of a chemical product based on a change in weight of the chemical product remaining in the dispenser, comprising: a weight measurement instrument that generates one or more electrical signals indicative of the weight of the chemical product remaining in the dispenser; a product holder configured to receive the chemical product; and an isolation mechanism configured to lift the product holder from a lowered position to a raised position, the isolation mechanism comprising: an actuator; a cam operatively connected to the actuator; and a lift plate configured to engage with the cam and configured to engage with the product holder, wherein rotation of the actuator produces a corresponding rotation of the cam such that an eccentric portion of the cam engages the lift plate and moves the lift plate and the product holder from the lowered position in which the weight of the chemical product is fully supported by the weight measurement instrument to the raised position in which the weight of the chemical product is fully supported by the lift plate.