An actuator includes a housing section that houses a driving source and is mountable on a first mounting region and a deploying section that is mountable on a second mounting region and deployable with a driving force of the driving source. The housing section includes a case of metal and a securing member supporting the driving source and secured to the case inside the case. A mounting hole is formed through the case and securing member for receiving a pivot member connected to the first mounting region. A fixing hole is formed through the case and the securing member at a different position from the mounting hole for receiving a fixing member that fixes the securing member to the case. An inner circumferential plane of the mounting hole of the case is in contact with the pivot member on the region disposed towards a deploying direction of the deploying section.

A vented pressurized gas-powered actuator includes a housing having a central longitudinal axis and an inner surface. The inner surface has a constant radius between first and second planes extending perpendicular to the axis. At least one vent groove extends from the inner surface in a direction away from the axis. The at least one groove has a first end intersecting the first plane.

A vented pressurized gas-powered actuator includes a housing having a central longitudinal axis and an inner surface. The inner surface has a constant radius between first and second planes extending perpendicular to the axis. At least one vent groove extends from the inner surface in a direction away from the axis. The at least one groove has a first end intersecting the first plane.

A pyrotechnic actuator includes a body, and a propelling system including a pyrotechnic igniter mounted inside the body. The pyrotechnic igniter is mounted inside the body such that a peripheral gap is formed between the body and the pyrotechnic igniter and the propelling system further includes a sealing gasket arranged inside the gap in such a manner that the pyrotechnic igniter is maintained in position with respect to the body.

A pyrotechnic actuator includes a body, and a propelling system including a pyrotechnic igniter mounted inside the body. The pyrotechnic igniter is mounted inside the body such that a peripheral gap is formed between the body and the pyrotechnic igniter and the propelling system further includes a sealing gasket arranged inside the gap in such a manner that the pyrotechnic igniter is maintained in position with respect to the body.

The invention relates to a thrust member for a pedestrian protection device of a motor vehicle, comprising: —a fixed body which is arranged to be fixed on the vehicle, —a piston which is movable relative to the fixed body between a rest position and a deployed position, —a pyrotechnic actuator which is arranged to move the piston from the rest position to the deployed position. The invention is characterized in that the piston is crimped to the fixed body to be held in the rest position.

The invention relates to a thrust member for a pedestrian protection device of a motor vehicle, comprising: —a fixed body which is arranged to be fixed on the vehicle, —a piston which is movable relative to the fixed body between a rest position and a deployed position, —a pyrotechnic actuator which is arranged to move the piston from the rest position to the deployed position. The invention is characterized in that the piston is crimped to the fixed body to be held in the rest position.

The invention relates to a fuel-operated firing device for driving securing elements into a substrate, comprising at least one main combustion chamber for a fuel, a driving piston that can be driven out of the main combustion chamber in a firing direction by expandable gases, and a pre-chamber with which an ignition device is associated and in which a pressure acting on the main combustion chamber can build up prior to a fuel-air mixture being ignited in said main combustion chamber. In order to improve the efficacy and/or functionality during the driving in of securing elements using the fuel-operated firing device, the pre-chamber has at least two venting connections which are mutually spaced in an axial direction and which have passages that can be exposed conjointly in order to facilitate rapid venting of the pre-chamber.

The invention relates to a fuel-operated firing device for driving securing elements into a substrate, comprising at least one main combustion chamber for a fuel, a driving piston that can be driven out of the main combustion chamber in a firing direction by expandable gases, and a pre-chamber with which an ignition device is associated and in which a pressure acting on the main combustion chamber can build up prior to a fuel-air mixture being ignited in said main combustion chamber. In order to improve the efficacy and/or functionality during the driving in of securing elements using the fuel-operated firing device, the pre-chamber has at least two venting connections which are mutually spaced in an axial direction and which have passages that can be exposed conjointly in order to facilitate rapid venting of the pre-chamber.

Disclosed herein are actuators and methods of making and actuating the same. Such actuators may comprise a body having a cavity, a membrane configured to cooperate with the cavity to form a combustion chamber, an inlet channel in fluid communication with the combustion chamber, an ignitor operable to ignite a combustible gas contained within the combustion chamber, and an outlet channel in fluid communication with the combustion chamber. The membrane may be configured to move in response to a change in pressure within the combustion chamber.