Snpe Materiaux Energetiques

Herakles

Pyroalliance

Faurecia Industries

Other

Renault S.a.s.

Snpe Materiaux Energeriques

Eric Laspesa

Jean-Paul Nadeau

Evrard Borg

Laurent D'Emmanuelle

Etienne Galmiche

David Negre

Yvon Tetu

Patrick Borde

David Duquesnoy

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

Set of equipment () for a motor vehicle includes an inflatable structure (), a support () for the inflatable structure, elements for () inflating the structure in a direction of inflation (D) in order to deploy it, a plate () for spreading the load when an occupant of the vehicle impacts on the deployed inflatable structure, and elements for guiding the structure as it deploys so that, in the deployed configuration, the structure extends along a median directrix line (L) distinct from its direction of inflation (D). The guide elements include the side wall () of the structure which, in the deployed configuration, is substantially taut.

Set of equipment comprising an inflatable structure and means for guiding its deployment, and corresponding motor vehicle

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 ().

Pyrotechnic actuator of the variable-thrust-acting type

This set of equipment for a motor vehicle includes an inflatable structure, an element acting as a support for the inflatable structure, an element forming a load-spreading plate and at least one frangible member for fixing the load-spreading plate to the support. The set includes a sheath, an open first end which is fixed to the support and an open second end which is fixed to the load-spreading plate to form the inflatable structure. The frangible member includes a thin web, a peripheral region which is fixed to a first element, either the load-spreading plate or the support, and a central region which is fixed to the other of these elements.

Set of equipment comprising an inflatable structure and a frangible fixing member, and corresponding vehicle

The technical field of the invention is that of devices used in the field of motor vehicle safety to protect a pedestrian in the event of a head-on impact between the said pedestrian and a motor vehicle. More precisely, the invention relates to a safety device () for lifting the bonnet () of a motor vehicle in the event of a collision, comprising a mechanism () for lifting the said bonnet (), an actuator () fitted with a pyrotechnic gas generator and a member for latching the said lift mechanism (). The main feature of this device is that the latching member consists of a hook () mounted pivotingly and fixedly attached to the said motor vehicle, the said actuator () inducing an action on the said hook () to unlatch the lift mechanism ().

Bonnet lift with actuator fitted with a hook latching system

A damping device used for motor vehicle safety, for damping the displacement of at least one part set in motion during a collision between a motor vehicle and an external object, the part being, for example, a bumper, a steering column or a bonnet of a motor vehicle, the device comprising an actuator that is able to displace a piston and is characterized in that it includes a wire having one end connected to a fixed portion of the vehicle, the actuator, which is secured to the part to be damped, interacting with the wire in order to retard and then stop the part.

Device for damping the displacement of a part, involving a metal wire

The technical field of the invention is that of motor vehicle safety involving energy absorption systems for damping the displacement of certain parts that are put into motion at the time of a mechanical collision between the motor vehicle and an externals object. The subject of the present invention relates to an energy absorption system for safety devices in a motor vehicle, comprising a pyrotechnic gas generator and a sliding position that can be displaced in a damping chamber, the said generator being able to release gas into the said chamber in order to damp the piston. The main characteristic of this system is that the gas generator delivers a variable quantity of gas and the damping chamber comprises a pressure-regulating device that is triggered above a threshold pressure.

Growing community of inventors

Six Fours, France

Eric Laspesa