A wearable infusion device comprises a reservoir that holds a liquid medicament, an outlet port that delivers the liquid medicament to a patient, a pump that displaces a volume of the liquid medicament to the outlet port when actuated, and a control that actuates the pump. The control comprises a snap...http://www.google.co.uk/patents/US20090088689?utm_source=gb-gplus-sharePatent US20090088689 - Disposable infusion device with snap action actuation