45 results about "Pyrotechnic initiator" patented technology

An device for use in an electro-pyrotechnic initiator comprises a header, a foil resistive strip, a substrate, and a current source. The substrate is mounted on the header. The foil resistive strip is mounted on the substrate. The energy source is connected to the resistive strip. When current flows through the resistive strip, the resistive strip generates enough heat to spark autoignition of a pyrotechnic material. The pyrotechnic material is in direct contact with the resistive strip. For an energy input of up to 115 microjoules, the resistive strip can cause autoignition in less than 25 microseconds. In a second embodiment, an electro-pyrotechnic initiator for use in a "smart" airbag system comprises a header, a foil resistive strip, a substrate, a current source connected to the resistive strip, and a control circuit. The control circuit is designed such that it will cause current to flow through the resistive strip when the circuit receives an appropriate signal. A ceramic capacitor can be used as an energy source for the resistive strip.

Enhanced airbag modules and associated methods are provided. An airbag module according to the invention may have a cushion with an inflatable protection zone and a flexible venting tube coupled to the inflatable protection zone. A closure mechanism may be used to compress the flexible venting tube against an anchoring member, such as a housing of the airbag module or a vehicle feature, until venting through the flexible venting tube is needed. The closure mechanism may then be actuated, for example, by igniting a pyrotechnic within a specially designed bolt of the closure mechanism. The bolt may, for example, have a bore with a pyrotechnic initiator molded-in-place within the bore. The bolt may fracture to open the closure mechanism, thereby permitting inflation gas to flow out of the inflatable protection zone via the flexible venting tube.

PCT No. PCT / FR96 / 00491 Sec. 371 Date Jan. 2, 1997 Sec. 102(e) Date Jan. 2, 1997 PCT Filed Apr. 1, 1996 PCT Pub. No. WO96 / 30231 PCT Pub. Date Oct. 3, 1996A safety device for a vehicle includes detection systems, safety mechanisms and safety systems, at least certain of the safety systems including pyrotechnic initiators. When certain of the detection systems detect a danger for a passenger, they trigger safety systems which activate the mechanisms. The safety device also may include a processing unit connected to the detection and safety systems by a communication interface; the processing unit analyses information signals coming from the detection systems and generates command signals directed to the safety systems.

An actuator connected to receive high pressure gas from a pyrotechnic initiator incorporates a primary piston and a secondary piston mounted for limited movement along cylindrical bores in a housing; the pistons are held in a fixed inactive position and are restrained from movement within the housing by a tension screw connected to the primary piston and the housing. The tension screw incorporates a calibrated reduced diameter section that ruptures at a predetermined applied force to permit the pistons to move within the housing. Gaseous products resulting from initiation are trapped and maintained within the housing by an expandable bellows secured internally of the housing at one end of the bellows and secured at the opposite end of the bellows to the interior of the housing. A calibration / test port extends through the housing into the bore externally of the bellows to permit calibration and testing of the actuator without initiating the pyrotechnic device.

A pyrotechnic initiator with enclosed on-board control circuitry, and a mating connector therefor.

A bore seal is includes a polymeric interface portion adapted for coupling to an initiator activation signal transmission medium, and an initiator-receiving portion adapted for receiving an initiator therein. The bore seal generally houses a pyrotechnic initiator or igniter therein, for incorporation into a gas generating system or other system having a pyrotechnically actuatable element.

A pyrotechnic initiator having an internal sleeve that facilitates the loading and durable retention of a pyrotechnic charge in place on the header surface within the initiator. The sleeve beneficially retains the charge either in conjunction with the upper interior surface of the charge can, or through the use of a monolithic charge and a narrowed top end of the sleeve.

A pyrotechnic switching device comprising a first and a second pyrotechnic initiators, and a body in which are present: an electrically conductive portion, and a mobile switching element having an insulating relief facing the conductive portion. The device also comprises a fuse element connected in series with the conductive portion, the first initiator being connected to the terminals of the fuse element so that tripping the fuse element actuates the first initiator, each initiator being configured to cause the device to switch from a current conducting configuration to a current interrupting configuration, the mobile switching element being set in motion toward the conductive portion in order to break it by the impact of the relief during switching from the first to the second configuration.

A pyrotechnic initiator having an internal sleeve that facilitates the loading and durable retention of a pyrotechnic charge in place on the header surface within the initiator. The sleeve beneficially retains the charge either in conjunction with the upper interior surface of the charge can, or through the use of a monolithic charge and a narrowed top end of the sleeve.

Enhanced airbag modules and associated methods are provided. An airbag module according to the invention may have a cushion with an inflatable protection zone and a flexible venting tube coupled to the inflatable protection zone. A closure mechanism may be used to compress the flexible venting tube against an anchoring member, such as a housing of the airbag module or a vehicle feature, until venting through the flexible venting tube is needed. The closure mechanism may then be actuated, for example, by igniting a pyrotechnic within a specially designed bolt of the closure mechanism. The bolt may, for example, have a bore with a pyrotechnic initiator molded-in-place within the bore. The bolt may fracture to open the closure mechanism, thereby permitting inflation gas to flow out of the inflatable protection zone via the flexible venting tube.

The present invention relates to a hybrid type gas generator for a motor vehicle safety device, the generator comprising at least: a combustion chamber (C) containing a pyrotechnic initiator (4) and pyrotechnic charge (5) for generating gas and including at least one oxidizing material, with combustion of the charge being triggered by said initiator (4); and a gas tank (3) that is closed towards the combustion chamber (C) by a capsule (8), the capsule being suitable for giving way during combustion of said charge (5) in order to release the gas from the tank (3) and exhaust it towards the outside, the generator being characterized by the fact that said combustion chamber (C) also contains a charge (9) of least one metal, said charge being distinct from the pyrotechnic charge (5).

A pyrotechnic initiator is provided with an encapsulation material retention feature on the output can, such as a swaged end or anchors.

A pyrotechnic initiator having an initiator including a relatively low monolithic ignition charge that is separated from an overlying output charge by an intermediary slip plane. The slip plane may simply be a non-integral junction between monolithic ignition and output charges, or it may be a junction between a monolithic ignition charge and a non-monolithic output charge, or it may be a void or barrier between the ignition and output charges.

A bore seal includes a polymeric interface portion adapted for coupling so an initiator activation signal transmission medium, and an initiator-receiving portion adapted for receiving an initiator therein. The bore seal generally houses a pyrotechnic initiator or igniter therein, for incorporation into a gas generating system or other system having a pyrotechnically actuatable element.

A breaker device for connecting in an electrical circuit, the device includes a pyrotechnic initiator and a body having present therein: a pressurizing chamber in communication with an outlet from the pyrotechnic initiator; at least one electrically conductive portion for connection to the electrical circuit; at least one fusible element connected in series with the conductive portion, the initiator being connected to the terminals of the fusible element and the fusible element being configured to trip when the current passing through it exceeds a predetermined value, thereby actuating the initiator; and a movable breaker element; the pyrotechnic initiator being configured to cause the breaker device to pass from a current-passing first configuration to a circuit-breaking second configuration, the movable breaker element being moved on passing from the first configuration to the second in order to disconnect the conductive portion.

The invention relates to an electro-pyrotechnic initiator, comprising a cap (9), a printed circuit plate (7) with a heating resistive element (71) turned toward a pyrotechnic load (8), electrodes (4, 6) connected to the element (71), and a substrate (2) supporting the plate (7), wherein the cap (9) comprises a part (92) adhered to the part (23) corresponding to the substrate (2). According to theinvention, a first part in the parts (23, 92) is plastic material opaque to a laser beam (FL) of determined wave length of welding, and the other part is made transparent plastic to the laser beam (FL) so as to transverse along direction to come across the first part by the laser beam (FL), thereby forming a zone (11) for welding parts (23, 92).

The invention relates to a pyrotechnic gas generator (10) for a motor vehicle safety airbag (12), comprising a pyrotechnic charge and a pyrotechnic initiator (28) which is situated in a combustion chamber (14) and able to be actuated by a first detection system (30) intended to detect an imminent collision state and / or by a second detection system (32) intended to detect an authenticated collision state. The pyrotechnic gas generator according to the invention further comprises a passage (16, 18) along which gases can flow between the said combustion chamber (14) and the said airbag (12), andat least one valve (34) that can be moved from a first position in which it defines a first bore section into a second position in which it defines a second bore section greater than the said first bore section, or vice versa. In particular, the valve (34) is designed to define the larger bore section when the pyrotechnic initiator (28) is actuated by the first detection system (30).

This generator comprises a tubular casing (1) sealed by a bottom (10), with a wall crossed by discharge orifices (100), and includes: an adapter sleeve (3) retained in the tubular casing (1) by crimping; a pyrotechnic initiator (2); a tubular filter (7) covering the discharge orifices (100); a pyrotechnic charge (6) inserted in-between the adapter sleeve (3) and the bottom (10); means for securing the charge comprising, on the bottom side, a transverse partition, and on the open side, an open-worked washer (4) urged towards the bottom (10); a sealing member (8) capable of breaking during combustion of the charge, then allowing the gases to escape out of the casing (1) via the filter (7) and the discharge orifices (100); and in that after failure of the sealing member (8, 90), the space occupied by the pyrotechnic charge (6) is delimited axially by said open-worked washer (4) and said bottom (10). Safety equipment for automobiles, notably for inflating an inflatable safety bag.

A pyrotechnic initiator having an initiator including a relatively low monolithic ignition charge that is separated from an overlying output charge by an intermediary slip plane. The slip plane may simply be a non-integral junction between monolithic ignition and output charges, or it may be a junction between a monolithic ignition charge and a non-monolithic output charge, or it may be a void or barrier between the ignition and output charges.

A pyrotechnic actuator for a power cutting tool is disclosed. The pyrotechnic actuator comprises a housing defining a cavity therein, a piston positioned at least partially within the cavity, and an insert-molded unitary assembly positioned within the cavity. The unitary assembly comprises a piston engagement member and a base. A sealed void is defined intermediate the piston engagement member and the base. The unitary assembly comprises a breakable member extending intermediate the piston engagement member and the base and a pyrotechnic initiator positioned at least partially within the base. The pyrotechnic initiator, upon application of a current pulse thereto, is configured to generate a pressurized gas in the sealed void that exerts a force on the piston engagement member and breaks the breakable member thereby causing the piston engagement member and the piston to move relative to the base and the housing.

Igniter base for a pyrotechnic initiator has a glass base together with fused-in contact pins that function as a pole carrier and thus fixes the contact pins in secure correlation to one another. The end side of the glass base and the contact pins form a level plane, so that an ignition bridge resting flush on the glass base can be attached to the poles. The contact pins project beyond the glass base on the opposite side and a part of the glass base and a part of the contact pins projecting beyond the glass base are equipped with a plastic jacketing.

A breaker device for connecting in an electrical circuit, the device includes a pyrotechnic initiator and a body having present therein: a pressurizing chamber in communication with an outlet from the pyrotechnic initiator; at least one electrically conductive portion for connection to the electrical circuit; at least one fusible element connected in series with the conductive portion, the initiator being connected to the terminals of the fusible element and the fusible element being configured to trip when the current passing through it exceeds a predetermined value, thereby actuating the initiator; and a movable breaker element; the pyrotechnic initiator being configured to cause the breaker device to pass from a current-passing first configuration to a circuit-breaking second configuration, the movable breaker element being moved on passing from the first configuration to the second in order to disconnect the conductive portion.

According to various implementations, a vehicle pyrotechnic initiator assembly includes an initiator that includes at least one electrode pin and a validation device in electrical communication with the at least one electrode pin. The validation device provides validation information about at least a portion of the initiator assembly and / or a safety device in which the initiator assembly is installed. The validation information may include a date associated with an expiration of the initiator assembly and / or the safety device. The validation information may also or alternatively include a manufacturer identity associated with a manufacturer of the initiator assembly and / or safety device. In some implementations, the validation device includes an electrical circuit and / or memory that stores the validation information. For example, the validation device may include an ASIC chip.

A test device and test method for a negative pressure flip-up umbrella, using special umbrella cabin tooling to simulate the structure interface size and volume of the umbrella cabin, installing a deceleration parachute assembly, the umbrella cabin tooling is equipped with an interface to connect the deceleration parachute strap, and simulating the speed of the deceleration parachute. The installation and fixing state in the umbrella cabin; through the sealing structure, the umbrella cabin tooling is attached to the umbrella cabin cover to form a sealed cavity; vacuum pumps and other equipment are connected to the umbrella cabin tooling to reduce the air pressure in the umbrella cabin tooling sealing cavity, simulating the umbrella cabin cover The state of working under negative pressure; the pyrotechnic control device detonates the catapult between the umbrella hatch and the tooling of the umbrella cabin, and the ejection canopy pulls out the deceleration parachute assembly; at the same time, the pyrotechnic control device sends a wireless trigger signal to the high-speed camera measurement device, and the high-speed The camera measurement device records the test images. The invention provides a negative-pressure working environment for the retractor recovery system, so as to check and verify the ejection separation performance of the canopy cover.

A pyrotechnic cut-off device to be connected to an electrical circuit to cut-off, includes a pyrotechnic initiator, a first and a second conductive portion each intended to be connected to the electrical circuit, the second portion being connected in parallel with the first portion and including two conductive elements separated by an insulating segment, at least one of the conductive elements provided with a first fuse element connected in series which is configured to trip when the intensity of the current passing therethrough exceeds a first predetermined value, and a first and a second insulating protrusion, each protruding from a lower face of a movable piston and the first and the second protrusions being located respectively in front of the first portion and the insulating segment. The pyrotechnic initiator is configured to switch the cut-off device from a first current passage configuration to a second current cut-off configuration.

A method of fabricating an opto-pyrotechnic initiator, includes a) forming a body having a cavity in which a pyrotechnic charge is to be received, the body also having an internal passage extending between the cavity containing the pyrotechnic charge and an inlet opening out in an outside face of the body; b) placing a first portion of an optical fiber in the internal passage of the body, with a second portion of the optical fiber extending beyond the inlet of the body, and a glass preform being interposed between the optical fiber and the inlet of the body; and c) applying heat treatment to the glass preform to raise the glass preform to a temperature higher than the melting point of the glass preform so as to form a hermetic sealing element made of glass between the optical fiber and the inlet of the body.

The invention relates to an electric pyrotechnic detonator, which includes a pyrotechnic charge (6), and the pyrotechnic charge (6) includes at least one compound component. The detonator also includes a plastic housing (1), which consists of two parts. The first part (2) includes a plastic wall (4) integrated with a bottom (5) made of plastic and constitutes a container. The second part (3) with a main axis (10) is crossed by at least two pins (11, 12) in the direction of said axis (10). The pins (11, 12) are connected together by a bridge (13) on a surface (14) of the component (3). The surface (14) is symmetrically concave with a height H and a width L. The second part (3) forms an insert. The first component (2) and the second component (3) are hermetically assembled together by ultrasonic welding.