US Patent 8727060 Pyrotechnic window breaker

A window breaker is provided that may include a housing, a pyrotechnic device and a piston. The housing may include a slot and a cavity having a first end and a second end. The slot may extend through a wall of the housing and into the cavity. The pyrotechnic device may be fixedly attached to the housing and at least partially disposed in the cavity. The piston may be disposed in the cavity between the pyrotechnic device and the first end. The piston may be movable away from the pyrotechnic device within the cavity from an undeployed position to a deployed position in response to actuation of the pyrotechnic device.