Abstract: A pyrotechnic circuit breaker includes a body, a piston slidably mounted in the body along a first direction, the piston having a first protrusion including a cutting edge, a pyrotechnic igniter, and a bus bar. The piston is adapted to move from a raised position to a lowered position to cut the bus bar into two distinct portions upon activation of the pyrotechnic igniter. The piston further includes a second protrusion extending from the lower face over a greater distance than the first protrusion. The bus bar includes an aperture aligned along the first direction with the second protrusion, the second protrusion and the aperture being adapted to cooperate such that the second protrusion is engaged in the aperture when the piston moves from the first position to the second position.

Abstract: A pyrotechnic circuit breaker, comprising a body, an igniter, a bus bar, and a piston which comprises a cutting edge and is movable along a normal direction to cut a portion of the bus bar, thereby separating the bus bar to break a circuit, wherein the cutting edge of the piston is stepped so that the portion of the bus bar is cut sequentially, in at least two successive cutting operations, characterized in that the bus bar comprises a breakable portion configured to be cut by the cutting edge of the piston, wherein said breakable portion comprises slots in order to divide the breakable portion into multiple sub-portions that are adapted to be cut sequentially by the stepped cutting edge of the piston.

Abstract: A method for delivering a liquid contained in a reservoir, the reservoir having a port for delivering the liquid which is closed off by a blow-out disk that is removable at a threshold pressure applied to the liquid, includes: the combustion of a pyrotechnic charge to generate combustion gases, the pressurization of the liquid by the combustion gases, and the removal of the removable blow-out disk from the delivery port and the delivery of the pressurized liquid. The flow rate of generated combustion gases during the delivery of the liquid ensures virtually constant pressurization of the liquid and thus the delivery of the liquid at a virtually constant flow rate. The pressure of the liquid during the delivery of the liquid varying only by a maximum of +/?30% with respect to its initial value at the time at which the blow-out disk is removed.

Abstract: A pyrotechnic circuit breaker ,comprising a body, an igniter, a piston a bus bar, wherein the piston comprises a cutting edge and is adapted to move along a normal direction from a raised position to a lowered position to cut a portion of the bus bar, thereby separating the bus bar into two distinct portions in order to break the electrical conduction of the bus bar.

Abstract: 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.

Abstract: A pyrotechnic circuit breaker (1), comprising a body (2), an igniter (4), a piston (5) and a bus bar (6), wherein the igniter (4), the piston (5) and the bus bar (6) are adapted to be accommodated within the body (2), and wherein the piston (5) comprises a cutting edge (51) and is adapted move along a normal direction (Z-Z) to cut a portion (61) of the bus bar (6), thereby separating the bus bar (6) into a proximal portion and a distal portion in order to break a circuit, wherein the cutting edge (51) of the piston (5) is stepped so that the portion of the bus bar (6) is cut sequentially, in at least two successive cutting operations along the movement of the piston (5) from a raised position to a lowered position, characterized in that the bus blade (6) comprises a breakable portion (61) configured to be cut by the cutting edge (51) of the piston (5), wherein said breakable portion (61) comprises slots (62) in order to divide the breakable portion (61) into multiple sub-portions (61a, 61b, 61c) that are adap

Abstract: 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.

Abstract: A pyrotechnic circuit breaker (1), comprising a body (2), an igniter (4), a piston (5) and a bus bar (6), wherein wherein the piston (5) comprises a cutting edge (51) and is adapted to move along a normal direction (Z-Z) from a raised position to a lowered position to cut a portion of the bus bar (6), thereby separating the bus bar (6) into two distinct portions in order to break the electrical conduction of the bus bar (6), wherein the body (2) comprises a longitudinal slot (21) arranged through a longitudinal direction (X-X) of the body (2), perpendicular to the normal direction (Z-Z), wherein the bus bar (6) and the longitudinal slot (21) are configured so that the bus bar (6) can be slidably inserted within the insertion slot (21), characterized in that the pyrotechnic circuit breaker (1) further comprises a drawer (7) adapted to be slidably inserted within the longitudinal slot (21) of the body (2), so that once inserted in the body (2), the drawer (7) and the body (2) define an insertion slot through th

Abstract: The invention relates to a triggered-stroke actuator (10) comprising a body (12) housing a piston (14) and a rod (16), and a gas generator (18) mounted in said body (12) opposite said piston (14) and capable of pressurising a first chamber (20) defined between said gas generator and said piston, in which the piston (14) comprises, on its external face, a groove (30) in which is housed a sealing joint (40) with the body (12) of the actuator (10). A calibrated passage (50), adapted to evacuate gas from the first chamber (20), is formed between the sealing joint (40) and the wall of the groove (30).

Abstract: A method for delivering a liquid contained in a reservoir, the reservoir having a port for delivering the liquid which is closed off by a blow-out disk that is removable at a threshold pressure applied to the liquid, includes: the combustion of a pyrotechnic charge to generate combustion gases, the pressurization of the liquid by the combustion gases, and the removal of the removable blow-out disk from the delivery port and the delivery of the pressurized liquid. The flow rate of generated combustion gases during the delivery of the liquid ensures virtually constant pressurization of the liquid and thus the delivery of the liquid at a virtually constant flow rate.

Abstract: A triggered-stroke actuator with its piston being held stationary in an initial position prior to triggering. The piston (13) is installed in the body (12) facing propulsion means (15) and a locking arrangement (19) that includes a latch (30) and at least one flexible tongue (23) attached to the periphery of the piston and having a hook (25) engaged with an internal abutment, the latch being moved at the beginning of triggering.

Abstract: The triggered stroke actuator comprises a cylinder (12) housing a movable assembly constituted by a piston (13), a rod (16) projecting from one end of the cylinder (12), and a slidable element (17) that is movable inside the cylinder (12). The actuator also includes means for propelling the piston (13) in response to a trigger command, and a return braking arrangement. The return braking arrangement is constituted by at least one ball (18) housed in an annular cavity (19) defined by the inside surface of the cylinder (12) and by the slidable element (17), a return spring (22) connecting the slidable element (17) to the piston (13), and a link element (23) connecting the ball (18) to the piston (13). The ball (18) is positioned by the link element (23) in a first segment (20) of the annular cavity (19) when the return spring (22) is relaxed, and in a second segment (21) of decreasing radial extent when the return spring (22) is compressed.

Abstract: Pyrotechnic actuator in particular for lifting the hood of an automobile in the event of a collision with a pedestrian. The actuator comprises a return-braking arrangement (25) acting between the rod (17) and the body (13) of the actuator and having an inertial actuating threshold in order to brake the rod in return only if it is subjected to a force under a sufficient acceleration truly representative of a collision.

Abstract: The invention relates to a triggered-stroke actuator (10) comprising a body (12) housing a piston (14) and a rod (16), and a gas generator (18) mounted in said body (12) opposite said piston (14) and capable of pressurising a first chamber (20) defined between said gas generator and said piston, in which the piston (14) comprises, on its external face, a groove (30) in which is housed a sealing joint (40) with the body (12) of the actuator (10). A calibrated passage (50), adapted to evacuate gas from the first chamber (20), is formed between the sealing joint (40) and the wall of the groove (30).

Abstract: The invention relates to a pyrotechnic gas generator (10) for a car airbag (12), the generator including a pyrotechnic charge and a pyrotechnic initiator (28) situated in a combustion chamber (14) and suitable for being actuated by a first detection system (30) for detecting an imminent collision state and/or by a second detection system (32) for detecting an actual collision state. The pyrotechnic gas generator of the invention further includes a gas flow passage (16, 18) between said combustion chamber (14) and said airbag (12), and at least one valve (34) suitable for being moved from a first position in which it defines a first flow section to a second position in which it defines a second flow section greater than said first flow section, or vice versa. In particular, the valve (34) is arranged in such a manner as to define a greater flow section when the pyrotechnic initiator (28) is actuated by the first detection system (30).

Abstract: The invention relates to a pyrotechnic gas generator (10) for a car airbag (12), the generator including a pyrotechnic charge and a pyrotechnic initiator (28) situated in a combustion chamber (14) and suitable for being actuated by a first detection system (30) for detecting an imminent collision state and/or by a second detection system (32) for detecting an actual collision state. The pyrotechnic gas generator of the invention further includes a gas flow passage (16, 18) between said combustion chamber (14) and said airbag (12), and at least one valve (34) suitable for being moved from a first position in which it defines a first flow section to a second position in which it defines a second flow section greater than said first flow section, or vice versa. In particular, the valve (34) is arranged in such a manner as to define a greater flow section when the pyrotechnic initiator (28) is actuated by the first detection system (30).

Abstract: A triggered-stroke actuator with its piston being held stationary in an initial position prior to triggering. The piston (13) is installed in the body (12) facing propulsion means (15) and a locking arrangement (19) that includes a latch (30) and at least one flexible tongue (23) attached to the periphery of the piston and having a hook (25) engaged with an internal abutment, the latch being moved at the beginning of triggering.

Abstract: A triggered-stroke actuator with a damped return stroke. According to the invention, the actuator houses a piston (15), and a gas generator (19) including a fast combustion pyrotechnic charge, and further houses a pyrotechnic charge (38) of combustion that is slower than the combustion of said gas generator (19).

Abstract: Pyrotechnic actuator in particular for lifting the hood of an automobile in the event of a collision with a pedestrian. The actuator comprises a return-braking arrangement (25) acting between the rod (17) and the body (13) of the actuator and having an inertial actuating threshold in order to brake the rod in return only if it is subjected to a force under a sufficient acceleration truly representative of a collision.

Abstract: The invention relates to a safety device for raising the bonnet of a motor vehicle in the event of a collision with a pedestrian. The safety device includes a pyrotechnic actuator provided with a thrust piston secured to a mechanism for raising the bonnet and able to deploy the said mechanism which is itself secured to the said bonnet, and a blocking device intended to block the said actuator in a given position. The main characteristic of this device is that it is made up of a shock-absorbing device employed when a pedestrian hits the bonnet which has been raised, so that the assembly consisting of the bonnet, the raising mechanism and the piston can move under the effect of the impact while at the same time being retarded.