Snpe Materiaux Energetiques

Herakles

Arianegroup Sas

Pyroalliance

Renault S.a.s.

Leoni Bordnetz-systeme Gmbh

Faurecia Industries

Snpe Materiaux Energeriques

Airbus Safran Launchers Sas

Jean-Paul Nadeau

Evrard Borg

Eric Laspesa

Frédéric Marlin

Laurent D'Emmanuelle

Romain Lorenzon

Etienne Galmiche

Peter Steiner

David Negre

Martin Burger

Yvon Tetu

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.

Pyrotechnic circuit breaker with improved cut of the blade

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 +/&#x2212;30% with respect to its initial value at the time at which the blow-out disk is removed.

Method for delivering a liquid pressurised by the combustion gases from at least one pyrotechnic charge

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.

Pyrotechnic circuit breaker having an improved structure for accommodating a bus bar, and assembly method thereof

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.

Pyrotechnic actuator

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

Triggered-stroke actuator fitted with a gas evacuation device

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

Triggered-travel jack for a safety system

The triggered stroke actuator comprises a cylinder () housing a movable assembly constituted by a piston (), a rod () projecting from one end of the cylinder (), and a slidable element () that is movable inside the cylinder (). The actuator also includes means for propelling the piston () in response to a trigger command, and a return braking arrangement. The return braking arrangement is constituted by at least one ball () housed in an annular cavity () defined by the inside surface of the cylinder () and by the slidable element (), a return spring () connecting the slidable element () to the piston (), and a link element () connecting the ball () to the piston (). The ball () is positioned by the link element () in a first segment () of the annular cavity () when the return spring () is relaxed, and in a second segment () of decreasing radial extent when the return spring () is compressed. Thus, the braking arrangement is released when the force applied to the piston () drops below a threshold value.

Hood-lifting actuator with disarmable return braking arrangement

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 () acting between the rod () and the body () 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.

Activated-stroke actuator, in particular for an automobile safety system for the protection of pedestrians

The invention relates to a pyrotechnic gas generator () for a car airbag (), the generator including a pyrotechnic charge and a pyrotechnic initiator () situated in a combustion chamber () and suitable for being actuated by a first detection system () for detecting an imminent collision state and/or by a second detection system () for detecting an actual collision state. The pyrotechnic gas generator of the invention further includes a gas flow passage () between said combustion chamber () and said airbag (), and at least one valve () 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 () is arranged in such a manner as to define a greater flow section when the pyrotechnic initiator () is actuated by the first detection system ().

Gas generator for motor vehicle safety airbag

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.

Mechanical absorption systems for an active bonnet hinge

The invention relates to a device for controlling the opening of the hood () of the engine compartment of a vehicle, connected to the vehicle body in a hinged manner for enabling it to partially open by rotating around the rear hinge toward the front of the vehicle from a position in which the hood () is latched to the vehicle body by means of at least one hook (). This device comprises an impact detector mounted at the front of the vehicle and interacting with an actuator () for controlling the unlatching of said hook () and comprises means for guiding the opening of the hood (), these means for guiding the opening of the hood () comprising means for guiding the rear edge () of the hood () in an essentially vertical direction.

Device for controlling the opening of the engine hood of a vehicle, particularly for protecting the head of a pedestrian in the event of a collision therewith

The technical field of the invention is that of pyrotechnic actuators including a piston and having the essential function of exerting thrust to move an object by causing the piston to emerge. The invention relates more particularly to a pyrotechnic gas generator (), a combustion chamber (), a piston () capable of moving in a slide chamber () under the effect of said gas, the two chambers () being in communication with each other. The main characteristic of this actuator is that it comprises a shutter device () implemented after said actuator () has been triggered to interrupt the communication between said chambers (), said shutter device () being included in the slide chamber ().

Pyrotechnic actuator with controllable force and optimised geometry

The technical field of the invention is that of the devices used in the field of automotive safety to protect a pedestrian in the event of a frontal impact between the said pedestrian and a motor vehicle. More specifically, the invention relates to a safety device () for raising the bonnet () of a motor vehicle in the event of a collision with a pedestrian, comprising 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 comprises 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.

The invention relates to a constant force pyrotechnic actuator comprising a pyrotechnic gas generator, a body, a piston capable of moving in the said body under the effect of the gases emitted by the generator, and a pressure regulator member situated inside the piston, the said piston having a front face traversed by a duct making it possible to place in communication the space separating the gas generator and the said piston, and an inner space in which the regulator member is housed. Within said actuator, the piston is extended by a hollow push rod terminating in an enlarged head, the said head having gas discharge ducts, and the inner space of the said rod is in communication with the inner space of the piston in which the regulator member is housed.

Pyrotechnic actuator furnished with a pressure regulator member

The technical field of the invention is that of pyrotechnic actuators comprising a piston, the basic function of which is to exert a thrust so as to displace an object by shooting out the piston. More particularly, the invention relates to a pyrotechnic actuator () comprising a pyrotechnic-gas generator (), a combustion chamber () and a piston () which can move in a slide chamber () under the effect of the said gases. The principal characteristic of this actuator is that it comprises a shut-off device (, 4) used after the triggering of the said actuator () in order, on the one hand, to close the slide chamber () and, on the other hand, to secure the depressurization of the combustion chamber ().

Growing community of inventors

Ollioules, France

Jean-Paul Nadeau