40results about "Pyrotechnical actuators" patented technology

Gas generator (1) comprising, in a cylinder housing (10), a combustion chamber (20) filled with gas generating means (25, 26) as a gas source, and a gas outlet opening (16) for expelling a gas generated by the combustion of the gas generating means (25, 26), wherein the combustion chamber (20) contains an ignition device containing an igniter (11) and closing a first end opening (10a) of the cylinder housing (10), a partition wall (15) closing a second end opening (10b) on the side axially opposite the first end opening (10a), and a perforated cylinder body (21) arranged in the combustion chamber (20); wherein the igniter (11) comprises an igniter main body having an ignition portion (12) and an igniter collar (13) surrounding and holding the igniter main body; wherein the perforated cylinder body (21) is arranged such that its first end (21a) surrounds the ignition section (12) of the igniter (11) and its second end (21b) is arranged on the axially opposite side on the side of the partition wall (15); wherein an interior of the perforated cylinder body (21) is a first chamber (22) filled with a portion of the gas generating means (25), and an exterior of the perforated cylinder body (21) is a second chamber (23) filled with the remaining gas generating means (26); and at least one gas outlet opening (16) is a through hole formed in a section of the partition wall (15) facing the second chamber (23), and no gas outlet opening is formed in a region of a length of more than 0.3 from the surface of the partition wall (15) on the combustion chamber (20) side toward the first end opening (10a) in a portion of the cylinder housing (10) facing the second chamber (23) when a length from the first end opening (10a) of the cylinder housing (10) to the surface, on the combustion chamber (20) side, of the partition wall (15) closing the second end opening (10b) is set to 1, wherein the second end (21b) abuts against a surface (15a) of the partition wall (15) on the combustion chamber (20) side or is provided opposite thereto with a small gap therebetween, the small gap being a gap equal to or smaller than a diameter of holes of the perforated cylinder body (21).

Power tools with detection systems configured to detect a dangerous condition between a person and a cutting tool are disclosed. Fast-acting and low-inertia actuators useable in various applications where a high force must be applied very quickly are disclosed. In power tools, for example in a woodworking machine, a fast-acting and low-inertial actuator as disclosed herein can be used to retract a blade upon detection of a dangerous condition by a detection system. Power tools with a magnetic force holding a blade from retracting until a detection system detects a dangerous condition are disclosed.

Provided is a locking tool capable of reducing the size or the number of parts as compared with the related art. A locking tool 100 includes a cylindrical member 10, an igniter 20 including a portion fitted into the cylindrical member 10, and a holder 30 that holds the cylindrical member 10 and the igniter 20 and is fixed to a part of a bag holder 40. The cylindrical member 10 is a bottomed cylindrical member including an opening portion provided at an end portion on a side of the igniter 20, and is a component in which a bottom portion 11, a cylindrical portion 12, a flange portion 13, and an actuation pin 14 are integrally molded. The bottom portion 11 is provided with a weak portion 11a that is an annular recess at a position facing an outer peripheral portion 14a of the actuation pin 14 described later on an inner surface. The weak portion 11a is broken by a pressure wave received at the time of activation of the igniter 20.

There is provided a safety apparatus that not only has excellent safety performance but also has improved ease of accommodation of an ejected object in a container, and is capable of securing diversity of attachment positions to an aerial vehicle as compared with a related art, and an aerial vehicle including the safety apparatus. The safety apparatus includes a pilot chute ejector 62 and a main parachute storage. The pilot chute ejector 62 includes an actuator 1, a push-up member 15 pushed up in one direction by the actuator 1, a pilot chute 16 pushed up while being supported by the push-up member 15, a bottomed cylindrical container 18 that accommodates the actuator 1, the push-up member 15, and the pilot chute 16, and a lid 21 having a fan-shaped cross section that closes an opening end of the container 18. The actuator 1 is fixed at a position shifted from a geometric center of the fan-shaped cross section on a bottom surface of the container 18 via a base 2.

To provide an actuator for a hood lifting device that regulates the retraction of a piston rod when a load from a hood is a predetermined value or less after the piston rod projects out, and can retract the piston rod when the load from the hood exceeds the predetermined value.SOLUTION: An actuator 1 for a hood lifting device moves a piston rod 3 disposed in a cylinder 2 by gas pressure, thereby lifting a hood of a vehicle. The actuator 1 is equipped with a holding mechanism 12 that is fixed on an inner peripheral surface of a tip end portion of the cylinder 2 and holds the piston rod 3 to prevent retraction after the piston rod 3 projects out. The holding mechanism 12 prevents the retraction of the piston rod 3 while being fixed on the inner peripheral surface of the cylinder 2 when a load on the piston rod 3 from the hood is a predetermined value or less, and is separated from the inner peripheral surface of the cylinder 2 to retract in the cylinder 2 along with the piston rod 3 when the load exceeds the predetermined value.SELECTED DRAWING: Figure 1

Belt tensioner (30) for a vehicle occupant restraint system with a housing (32), a working chamber (34) into which the compressed gas released in the event of restraint flows, a traction cable (24) which extends through an opening (36) in the housing (32), and a sealing bushing (10) for sealing the working chamber (34) with respect to the opening (36) between the traction cable (24) and the housing (32), characterized in that the sealing bushing (10) is cylindrical and comprises an outer sleeve (16) and an inner sealing element (12), wherein the radially outer circular-cylindrical surface of the inner sealing element (12) is surrounded by the sleeve (16), and wherein the sealing bushing (10) is pressed onto the traction cable (24) by plastic deformation of the outer sleeve (16).

To provide a pop-up hood device which facilitates mounting, and can reduce cost.SOLUTION: A pop-up hood device mounted on a moving body includes an actuator for lifting a hood panel of the moving body, and a base member which is provided on the moving body and is mounted with the actuator, wherein the base member has a storage part for storing an end opposite to a side that comes in contact with the hood panel of the actuator.SELECTED DRAWING: Figure 1

An actuator (12) of a vehicle protection system (10) has a housing (26) and a movable piston (14). The piston (14) has a rigid piston tube (34) that is open at one end (42), a rigid cap (48) that closes the end (42) of the piston tube (34), and an annular seal (64). The cap (48) has a pin-shaped projection (52) that extends into the piston tube (34). The seal (64) has a piston-side section (68) and a cap-side section (70) which, prior to activation of the actuator (12), are axially adjacent to one another and merge into one another in one piece, wherein the piston-side section (68) is clamped between the piston tube (34) and the housing (26) and the cap-side section (70) extends axially adjacent to the piston-side section (68) along the piston tube (34) in the direction of the end face (42) of the piston tube (34).The seal (64) has a predetermined tear zone (78) at which the cap-side portion (70) of the seal separates from the piston-side portion (68) of the seal (64) during the movement of the piston (14). The cap (48) is fixed to the piston tube (34) by caulking the pin-shaped projection (52) against an inner peripheral surface (56) of the piston tube (34).

In particular, it provides a tensioning device that can be more easily adapted to different requirements. [Solution] The present invention relates to a tensioning device for a safety belt component, comprising a gas generator (1) for generating pressurized gas, a piston (2) that can be driven by the pressurized gas, a tensioning cable (3) connected to the piston (2) and that can be connected to a safety belt component (4) to cause a fastening movement, a fastening tube (5) for receiving and guiding the piston (2), and a receptacle (6) that houses the gas generator (1).

A pyrotechnic switching device comprises a housing containing fixed contacts (104,106, figure 1), a movable contact 108, and at least one pyrotechnic actuator 202 which when activated moves the movabl

The invention relates to the technical field of gas explosion type sound sources, and discloses a synchronous excitation control system and method for a gas explosion sound source array, and the control system comprises a control assembly and the gas explosion sound source array connected with the control assembly. The gas explosion sound source comprises an electromagnetic valve, a cylinder body, a valve core, a piston, an induction magnet assembly, an induction coil assembly and a gas inlet nozzle; the valve core comprises a valve core main body part and a valve core connecting part; a valve core is arranged in the cylinder body, and a main air chamber is formed between a main body part of the valve core and the cylinder body; an electromagnetic valve and an air inlet nozzle are respectively arranged on the end face of the valve core main body part; the piston is arranged in the groove of the valve core main body part and is movably matched with the surface of the valve core connecting part; an induction magnet assembly is arranged on the piston, and an induction coil assembly corresponding to the induction magnet assembly in position is arranged on the cylinder body; according to the invention, synchronous excitation and synchronous control can be carried out on the gas explosion sound source array, the integral structure integration is strong, and the environmental adaptability is good.

Provide a safety device that enables easy pushing back of the piston towards the retracted position. 【Solution means】The safety device (100) includes a housing (1) having a first end (2) and a second end (3), a piston (4) fitted therein, and a gas generator (15). The piston (4) has a first end that forms a pressure surface (6) facing the first end of the housing (1). A gas chamber (8) is formed between the pressure surface (6) of the piston (4) and the inner wall (7) of the housing (1), and the gas generator (15) is in the gas chamber (8). The housing (1) includes a gas discharge configuration (20) at its second end (3), whereby when the piston (4) is in a fully or substantially fully extended position, the gas generated by the gas generator (15) is discharged from the gas chamber (8).

The present invention provides an ignition device comprising an igniter fixed to an igniter collar, a first cup element filled with a gas-generating component, and a second cup element. The first cup element covers the detonator collar, so that a section is enclosed which contains a detonator section of the detonator. The second cup element covers the detonator collar, thus enclosing the first cup element. A gap is formed between an outer surface of the first cup element and an inner surface of the second cup element to function as a heat insulation layer. The first cup element has a first opening device, and the second cup element has a second opening device, and at least one of the first opening device and the second opening device is closed before activation and is open only when the gas is generated by the gas generating component.

The invention relates to a drive arrangement for a flap (2) of a motor vehicle (3), wherein a first drive train (4) has a first drive (5) for generating a first drive movement between a flap-side drive connection (7) and a body-side drive connection (8), wherein in a normal state the first drive movement causes the flap (2) to open from a closed position to an open position, wherein the flap-side drive connection (7) is part of a first coupling device (12) of the first drive train (4) and the body-side drive connection (8) is part of a second coupling device (13) of the first drive train (4), wherein the flap (2) is also adjustable from the closed position to a collision position.It is proposed that the first and / or second coupling device (12, 13) is each designed as a ball groove joint (17) with an elongated joint socket (18) and a joint head (19) mounted therein that is linearly displaceable and rotatable, and that when the flap (2) is moved from the closed position to the collision position, the first drive train (4) is moved from its normal state to an avoidance state in which the joint head (19) is displaced relative to the elongated joint socket (18) compared to the normal state in which the joint head (19) is in a normal position relative to the elongated joint socket (18).

An actuator (12) in a vehicle protection system (10) has a housing (26) and a movable piston (14). The piston (14) comprises a rigid piston tube (34) open at one end face (42), a rigid cap (48) with a cover part (50) closing the end face (42) of the piston (14), and an annular seal (64). The cap (48) has a pin-shaped projection (52) which extends into the piston tube (34), wherein the seal (64) surrounds the pin-shaped projection (52) and wherein the end face (42) of the piston (14) has an axially tapered cutting edge structure (68) which projects into the seal (64) such that the cutting edge structure (68) delimits a radially inner section (70) of the seal (64) between the pin-shaped projection (52) and the cutting edge structure (68) from a radially outer section (72) of the seal (64) radially outside the cutting edge structure (68).To manufacture the actuator (12), the seal (64) is placed on the cutting edge structure (68) of the piston tube (34) and the cap (48) is placed on the open end face (42) of the piston tube (34) such that the pin-shaped projection (52) projects into the piston tube (34) and the cover part (50) rests on the seal (64) and is arranged axially above the cutting edge structure (68), and the pin-shaped projection (52) is caulked on an inner circumferential surface (56) of the piston tube (34).

In particular, it provides a tensioning device that can be more easily adapted to different requirements. [Solution] The present invention provides a tensioning device for a safety belt component, comprising a gas generator (1) for generating pressurized gas, a piston (2) that can be driven by the pressurized gas, a tensioning cable (3) connected to the piston (2) and that can be connected to a safety belt component (4) to cause a tightening movement, a tightening tube (5) for receiving and guiding the piston (2), and a receptacle (6) that houses the gas generator (1).

An actuator (12) in a vehicle protection system (10) has a housing (26) and a displaceable piston (14). The piston (14) comprises a rigid piston tube (34) which is open at one end face (42), a rigid cap (48) which closes the end face (42) of the piston (14) and has a cover part (50), and an annular seal (64). The cap (48) has a pin-shaped projection (52) which extends into the piston tube (34), wherein the seal (64) surrounds the pin-shaped projection (52), and the end face (42) of the piston (14) has an axially tapering cutting structure (68) which protrudes into the seal (64) such that the cutting structure (68) delimits a radially inner portion (70) of the seal (64) between the pin-shaped projection (52) and the cutting structure (68) from a radially outer portion (72) of the seal (64) radially outside the cutting structure (68). In order to produce the actuator (12), the seal (64) is placed on the cutting structure (68) of the piston tube (34), the cap (48) is placed on the open end face (42) of the piston tube (34) such that the pin-shaped projection (52) protrudes into the piston tube (34) and such that the cover part (50) rests on the seal (64) and is positioned axially above the cutting structure (68), and the pin-shaped projection (52) is caulked to the inner circumferential surface (56) of the piston tube (34).

Actuator (1) for a gas bag module, comprising a piston (2) having a circumferential flange (3), an igniter unit (4), and a housing (6) having a end wall (7) and a side wall (8), wherein the piston (2) is axially movably mounted in an opening (9) of the end wall (7) and is retractable into the housing (6), wherein the igniter unit (4) is fixedly connected to the housing (6), wherein an intermediate space (11) is formed between the circumferential flange (3) and the end wall (7) of the housing (6), which is fluidly connected or fluidly connectable to the igniter unit (4) by means of a gas guide in order to direct a gas from the igniter unit (4) to the intermediate space (11), wherein the gas guide has at least one separating element (45) which causes a reversal of the gas flow direction by 180° to the direction of gas discharge from the igniter unit (4). enables the piston (2) to be movable in the direction of the igniter unit (4),and wherein the separating element (45) of the gas guide has at least one first opening (20) formed in a side wall of the piston (2), characterized in that the separating element (45) is formed from two components, the piston (2) and a sleeve (24), which are displaceable relative to each other, wherein the separating element (45) has at least one second opening (26) formed in a side wall of the sleeve (24) of the igniter unit (4) and which is fluidly connectable to the first opening (20), wherein the at least one first opening (20) of the piston (2) is larger than the at least one second opening (26) of the sleeve (24), wherein the at least one first opening (20) is arranged displaceably relative to the at least one second opening (26) such that their surfaces projecting onto each other at least partially overlap.

In particular, it provides a tensioning device that can be more easily adapted to different requirements. [Solution] The present invention provides a tensioning device for a safety belt component, comprising a gas generator (1) for generating pressurized gas, a piston (2) that can be driven by the pressurized gas, a tensioning cable (3) connected to the piston (2) and that can be connected to a safety belt component (4) to cause a tightening movement, a tightening tube (5) for receiving and guiding the piston (2), and a receptacle (6) that houses the gas generator (1).

A pneumatic actuator for imparting velocity to a resting object, comprising a fixed member and a ram, the ram having two or more generally elongated ram members, wherein the fixed member is formed with a base plate having an inlet hole therethrough, the ram members are formed and disposed concentrically about the center axis so as to lie one within another and to move in a telescopic arrangement, the innermost one of the ram members is configured to enable it to be driven by any pressurized gas fed through the inlet hole and to drive the object, and each of the other ram members is configured to move only behind the innermost ram member; the actuator being operative to move the innermost ram member along its entire range of motion and thereby impart velocity to the object.

An actuator includes a housing having an inner surface, a proximal end, and a distal end. A gas generator is coupled to the proximal end of the housing. The actuator also includes a piston rod slidably engaged with the inner surface of the housing, the piston rod having a proximal end and a distal end opposite the proximal end. A piston head is coupled to the proximal end of the piston rod and a seal is disposed between the piston rod and the piston head. The piston head is movable relative to the piston rod from a first position prior to deployment of the gas generator to a second position after deployment of the gas generator, wherein movement of the piston head from the first position to the second position compresses the seal.

An actuator for a vehicle includes a housing having a central axis, an inner surface, a distal end, and a proximal end. The distal end defines a distal end wall that extends at least partially radially inwardly toward the central axis. A hollow piston rod is slidably engaged with the inner surface of the housing. The piston rod includes a proximal end and a distal end and defines an inner volume extending from the proximal end to the distal end. The piston rod is movable axially from a retracted position to an extended position. The actuator further includes a piston rod cap that seals the distal end when the piston rod is in either the retracted position or the extended position and seals a space between the distal end wall of the housing and the piston rod when the piston rod is in the retracted position.

An actuator includes a housing having a central axis, an inner surface, a distal end, and a proximal end. The distal end defines a distal end wall that extends at least partially radially inwardly toward the central axis. A gas generator is coupled to the proximal end. The actuator also includes a piston rod slidably engaged with the inner surface of the housing, the piston rod having a proximal end disposed adjacent the gas generator and a distal end disposed adjacent the distal end of the housing..A cap is coupled to the distal end of the piston rod, the cap defining a cavity having a first portion, a second portion, and an end wall. The first portion has a first wall and the second portion has a second wall, and the second wall tapers toward the central axis from adjacent the first wall toward the end wall.

The invention relates to the technical field of fire safety, and discloses a puncture valve with a signal feedback function, which comprises a puncture component, the puncture component comprises a sleeve and a sliding plug slidably arranged in the sleeve, and the sliding plug divides the interior of the sleeve into a front cavity and a rear cavity; the starting assembly is used for receiving an electric signal and driving the sliding plug to slide towards the front cavity, and the feedback assembly is used for outputting a feedback signal according to the temperature change in the rear cavity and / or the position change of the sliding plug sliding towards the front cavity after the starting assembly is triggered. The feedback assembly comprises a feedback element and a second wiring terminal electrically connected to the fire-fighting host, and the second wiring terminal and the feedback element are electrically connected through a second wire. The working state of the puncture valve can be monitored, various signal feedback implementation modes are provided, and the knowability and reliability of an energy storage fire extinguishing system are improved.

Pyrotechnic actuator (1) comprising a tubular housing (2) having a pyrotechnic detonator (21) at one end, and further comprising a piston with piston tip (4a) and piston rod (4), wherein the piston tip (4a) is displaceable in the housing (2) by the detonator (21) from an initial position adjacent to the detonator (21) to an end position distant from the detonator (21), and wherein a one-piece sealing element (5) is provided at the end of the housing (2) facing away from the detonator (21) between the piston rod (4) and the housing (2), wherein the piston rod (4) passes through the sealing element (5) and has a step (14) in the region of the sealing element (5), wherein the outer diameter (13) of the piston rod (4) on the side of the step (14) facing away from the detonator (21) is smaller than the outer diameter (12) on the side facing the detonator (21). (21) side facing the step (14), characterized in that the sealing element (5) has a corresponding opposing step (27),so that the sealing element (5) sits on the step (14) of the piston rod (4).

Disclosed is a pyrotechnic driving device, including: a housing, a rear cover, an end cover, a special-shaped nut, a fuel gas generator, a sleeve, a force bearing column, and a piston rod. An accommodating cavity P1 is formed between the sleeve and the housing, an accommodating cavity P2 is formed between the sleeve and the piston rod, and there is an accommodating cavity P3 between the force bearing column and the special-shaped nut. A fuel gas outlet of the fuel gas generator discharges fuel gas into an accommodating cavity P4 that is inside the housing and located between the special-shaped nut and the rear cover, and the fuel gas in the accommodating cavity P4 enters the accommodating cavity P1 by means of a fuel gas channel on the special-shaped nut. In an early operation stage, the fuel gas in the accommodating cavity P1 enters the accommodating cavity P3 by means of the accommodating cavity P2, and the fuel gas in the accommodating cavity P3 is configured to exert an acting force on the force bearing column, so that the piston rod moves away from the special-shaped nut. In middle and late operation stages, the fuel gas in the accommodating cavity P1 enters the accommodating cavity P3 by means of a through hole on the sleeve. The low-impact, low-overload pyrotechnic displacement driving device provided by the present disclosure has both functions of initial locking and in-place locking.

Pyrotechnic tensioner (10) for a safety system in a vehicle, comprising a gas generator (22) having a propellant charge (26) and an igniter (32), and a housing (12) in which a pressure chamber (14) is provided into which the gas can flow and in which a piston can be moved in the tensioning direction by the gas, and a tension transmission means connected to the piston which extends longitudinally out of the pressure chamber (14), wherein an end piece (16) is provided on the housing (12) which closes the pressure chamber (14) in the opposite direction to the tensioning direction and in which a chamber (24) is provided into which the propellant charge (26) is filled and whose wall forms the wall of the propellant defined by the propellant charge (26), characterized in that the end piece (16) is made of plastic and is at least partially enclosed by a metal tube (38),and that the pressure chamber (14) is closed by a plug receptacle (32) on the end face facing away from the traction transmission means.

This pop-up hood device is mounted on a mobile body and comprises: an actuator that lifts a hood panel of the mobile body; and a base member that is provided on the mobile body and to which the actuator is attached. The actuator has at least one engagement claw. The base member has at least one engagement portion that can engage with the engagement claw.

The invention relates to a pyrotechnic actuator (1) comprising a cylindrical housing (2), on a first axial end section of which a connecting device (6) for connecting to a component is provided and in a second axial end section of which an ignition unit (14) is accommodated, the pyrotechnic actuator comprises a piston (4) which is guided in an axially displaceable manner in a housing (2), the axial movement of which in the housing (2) can be triggered by igniting a propellant (20) by means of an ignition unit (14) in order to actuate the actuator (1) in such a way that the propellant (20) can be ignited by the ignition unit (14). According to the invention, the housing (2) has, in the region of the second axial end section, a circumferential projection (30) which projects radially outward and which forms in the interior a receiving space in which a fastening ring (28) for axially fastening the ignition unit (14) is received. The invention also relates to a vehicle safety device (8) and to a method for producing a pyrotechnic actuator (1).

The invention relates to a pyrotechnic drive unit (10), in particular for a hood lifter or an active headrest. Here, the pyrotechnic drive unit (10) has a housing (12) having a cavity (14) in which a piston (16) is mounted, which piston can be moved from a rest position into an activated position. Furthermore, the pyrotechnic drive unit (10) comprises a pyrotechnic unit (20) having an igniter (22) at one end (24) of the housing (12), the pyrotechnic unit being able to move the piston (16) into its activated position. In this case, the housing (12) is closed at one end (32) opposite the pyrotechnic unit (20) on the end side by a closing element (38). The pyrotechnic drive unit (10) comprises a holding element (36) for fixing the pyrotechnic drive unit (10) on the vehicle side, and a closure element (38) connects the housing (12) to the holding element (36). The invention further relates to a method for producing such a pyrotechnic drive unit (10).