NOVELTY - The device (10) has a drug delivery pump that is provided with a dosing chamber (30) for delivering a substance. A thermal energy source (14) is arranged to cause a sufficient change in temperature in a portion of the pushing apparatus so that the pushing apparatus impart a pushing force against the substance to cause the substance to be delivered from dosing chamber. A controller is provided for controlling the delivery of the substance from the dosing chamber. A thermal insulator thermally insulates the substance in the dosing chamber from the thermal energy source.    USE - Device for delivering e.g. drug such as insulin to human and animal such as dog, cat, horse, cattle, sheep, and goat. Can also be used in delivering scent and deodorizer.    ADVANTAGE - The delivery device is constructed of multiple layers, and the easy and less expensive manufacturing and assembly are achieved. The delivery device is flexible, bendable and encapsulated with a conformal coating that protects it from possible environmental or from damage and also protects the user from adverse effects from internal components of the device. The separation element is sealed tightly against the chamber membrane so as to prevent liquid or vapor from leaking past the chamber membrane to the substance, so this prevents any possible leaking due permeability of the membrane material. The actuating substance is provided in the actuating chamber, thus maintaining a sufficient level of actuating substance within the chamber over long periods of time. The actuating chamber is sealed so that the actuating substance is prevented from leaking into the substance in the dosing chamber. Since the dosing chamber and substance are isolated from actuation substance by a combination of chamber membrane, separation element and substance-delivery membrane, the isolation and medical safety are enhanced.    DESCRIPTION OF DRAWING(S) - The drawing shows an exploded perspective view of the delivery device.    Delivery device (10)    Thermal energy source (14)    Dosing chamber (30)    Valve membrane (34)    Container (44)