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57results about "Explosive based starters" patented technology

Gas generator for seat belt pretensioner

An apparatus (10) for providing fluid under pressure for actuating a vehicle occupant protection device comprises an electrically actuatable initiator (80) having terminal pins (100). A hermetically sealed metal propellant container (130) contains a propellant (82) ignitable by the initiator (80) to produce fluid under pressure. The propellant container (130) is secured to the initiator (80) by crimping. The apparatus (10) also comprises a member (86) electrically insulating between the metal propellant container (130) and the terminal pins (100) of the initiator (80) to isolate the initiator electrically from the propellant container.
Owner:TRW INC

Linear actuator with an internal dampening mechanism

A linear actuator with an internal dampening mechanism is disclosed. The actuator has a housing has a first end and a second end and forms an internal chamber. A constricted opening is also added to the actuator at the first end. A piston is disposed within the housing and is capable of sliding along the chamber. The piston has a head portion and a shaft portion. The shaft portion is slidable through the constricted opening whereas the head portion is not slidable through the constricted opening. A fluid is also added to the actuator. The fluid is disposed within the housing. In one embodiment, the actuator is constructed such that the sliding of the shaft portion forces a fluid through the constricted opening such that the movement of the piston is dampened. In an alternative embodiment, the actuator includes one or more second pistons and an orifice. In this embodiment, the actuator is constructed such that the sliding of the piston forces the fluid through the orifice and causes the second pistons to telescopically extend from the first piston.
Owner:AUTOLIV ASP INC

Method and system for the emergency start-up of an energy generator set

An emergency starter that allows responsiveness within a few seconds, without having disadvantages associated with mass and size of a back-up hydraulic or pneumatic starter. An instantaneous gas thrust of pyrotechnic type is coupled with a positive displacement transmission generator in conjunction with automatic coupling to / uncoupling from a set that is to be started. An emergency start-up system includes at least one pyrotechnic gas generator connected to an electrical initiator itself connected to a computer, a positive displacement motor housing straight-cut gears, the pyrotechnic gas generator being coupled to the motor by an inlet in the casing. The motor includes a mechanism of connection capable of moving at one end of the drive shaft configured to couple the transmission shaft to a driven shaft of the set that is to be started via a centrifugal clutch.
Owner:SAFRAN HELICOPTER ENGINES

Actuator

An actuator includes a hollow cylinder which has a first portion and a second portion. The inner diameter of the first portion is larger than that of the second portion. A piston is inserted in the cylinder. The actuator has a gas generator which supplies a gas into the cylinder to move the piston toward the first portion. The seal member keeps airtightness between the piston and the cylinder when the piston stays in the second portion and flows the gas when the piston stays in the first portion. A hollow stopper is arranged in the first portion and stops the piston. The stopper has a vent groove which is provided on the inner surface and connects the interior of the cylinder to the open end. A piston rod is jointed to the piston and housed in the cylinder. The piston rod moves along the axis with the piston.
Owner:NHK SPRING CO LTD

Enclosed rocker arm cover assembly having internal multi-coil mounting plate

An improved rocker arm cover assembly having an upper coil chamber that is enclosed and a lower rocker arm chamber that includes special seal and flange members to isolate it from the engine head. The fully enclosed upper coil chamber includes a mounting plate on which a plurality of coils is mounted. A fully isolated, dual function, oil fill / PCV valve, conduit is provided through the upper chamber to permit adding lubrication oil or permitting exhaust of crankcase vapors without contaminating the coils. Several variations of coils and coil mounting brackets are disclosed.
Owner:HARBERT RICHARD H

Micro gas generator

A gas generator usable in a vehicle occupant protection system. The gas generator includes an initiator holder and an initiator secured within the holder, the initiator including a housing enclosing an initiator charge. A bore seal is molded into the initiator holder, and a casing is attached to the bore seal along an exterior surface of the bore seal. A gas generant material is positioned within the casing so as to enable fluid communication between the gas generant and combustion products formed by combustion of the initiator charge, thereby enabling ignition of the gas generant. In one embodiment, an edge portion of the casing is pre-formed so as to snap-fit over a shoulder formed along the bore seal. In another embodiment, an edge portion of the casing is crimped onto outer surfaces of the bore seal. In yet another embodiment, the casing is welded to the bore seal.
Owner:JOYSON SAFETY SYST ACQUISITION LLC

Structure and method for the affixing of a pretensioner gas generator

The provision of a structure and method for the affixing of a pretensioner gas generator by which the function of the pretensioner can be improved without the need to use an additional component part or to increase the thickness of the wall of the pipe. In the structure for the affixing of a pretensioner gas generator, a gas generator 16 is held in a pipe 12 by the expanding of the end part 12b of a pipe 12 to form a housing part 15 for the gas generator 16, the gas generator 16 is housed in the housing part 15, and the opened end 15b of the pipe 12 in the structure for the affixing of the gas generator is calked, an annular rib 17 projects outward in the axial direction from the inner circumferential edge part of the calked part A. In the method for the affixing of the gas generator, a press is used to form the abovementioned annular rib 17.
Owner:SANOH IND CO LTD

Buckle tensioner

InactiveUS6155727AEasy alignmentSmaller resistance to a deflectionBelt retractorsSafety beltsEngineeringMechanical engineering
A buckle tensioner for a belt buckle arranged adjacent to a vehicle seat includes a piston / cylinder unit with a cylinder having an interior and with a piston arranged in the interior, and an elastically deflectable traction transfer device connecting the piston and the belt buckle. The traction transfer device offers a smaller resistance to a deflection of the belt buckle towards the vehicle seat than to a deflection away from the vehicle seat.
Owner:TRW OCCUPANY RESTRAINT SYST

Gas generator

A gas generator comprises an outflow chamber and a freeing element. The outflow chamber contains at least briefly gas under pressure, when the gas generator is activated and at least one outflow opening is arranged in a side wall of the outflow chamber. The freeing element is arranged non-displaceably in the outflow chamber and has a peripheral wall and a base wall. The peripheral wall extends along the side wall and closes at least one outflow opening before an activation of the gas generator. The base wall is connected with the peripheral wall. The freeing element is constructed so that on exceeding a predetermined gas pressure in the outflow chamber, the base wall turns inwards under partial plastic deformation of the peripheral wall and at least one hitherto concealed outflow opening is freed by the plastic deformation of the peripheral wall.
Owner:TRW AIRBAG SYST

Fuel injection nozzle with film-type fuel application

A fuel injection nozzle for a gas turbine combustion chamber with a film applicator (1) is provided with several fuel openings (2). Center axes (5) of the fuel openings (2) through the film applicator (1), with regard to their radial orientation, are essentially parallel to the main flow direction (6) of the air.
Owner:ROLLS ROYCE DEUT LTD & CO KG

Combustion-type power tool

A combustion-type nail driver uses a motor for driving a fan. A motor holder formed from plastic accommodates the motor. A cylinder head has a motor holder receiving portion in which the motor holder is slidably movably disposed. A coil spring has one end secured to the motor holder and another end secured to the cylinder head to thereby support the motor holder. Initial acceleration applied to the motor when combustion occurs can be suppressed and impact imparted upon the motor can also be suppressed by friction between the outer periphery of the motor holder and the inner periphery of the motor holder receiving portion. A heat shielding plate is interposed between the lower end surface of the motor and the cylinder head in order to prevent hot air combustion gas from entering into the motor.
Owner:HITACHI KOKI CO LTD

Gas generator for seat belt pretensioner

An apparatus comprises vehicle seat belt webbing (18), a cylinder (50), and a piston (60) movable in the cylinder to effect pretensioning of the seat belt webbing. The apparatus also comprises a fluid source (10) for providing fluid under pressure to move the piston (60) in the cylinder (50). The fluid source (10) comprises a propellant container (122) defining a propellant chamber (123) and a propellant (82) in the propellant chamber. The propellant (82) is ignitable to produce fluid under pressure. The propellant container (122) comprises a first portion (124) made from plastic and a second portion (126) made from metal. The metal portion (126) is secured to the plastic portion (124) to effect a hermetic seal of the propellant container (122).
Owner:TRW AUTOMOTIVE US LLC

Seat belt device

A seat belt device has a gas generator for generating a high pressure gas when the vehicle is in emergency, a cylinder for conducting the high pressure gas from the gas generator, a piston received movably within the cylinder and pressed and moved by the high pressure gas, and a drive unit for rotating a winding shaft of a seat belt retractor in a direction of removing the slack of a belt, using the movement of the piston, wherein the pretensioner is employed with the energy absorbing mechanism, for reversely rotating the winding shaft if a tension acting on the belt exceeds a predetermined value after removing the slack of the belt.
Owner:NSK AUTOLIV

Micro gas generator

A gas generator usable in a vehicle occupant protection system. The gas generator includes an initiator holder and an initiator secured in the initiator holder. The initiator includes a housing enclosing an initiator charge. A metallic bore seal is secured to the initiator holder, and a casing is adhesively secured to the bore seal along an exterior surface of the bore seal. A gas generant is positioned within the casing so as to enable fluid communication between the gas generant and combustion products formed by combustion of the initiator charge, thereby enabling ignition of the gas generant.
Owner:JOYSON SAFETY SYST ACQUISITION LLC

Pretensioner with integrated gas generator

A low cost pretensioner is provided by using an ignitable charge and initiator integrated with a piston which is disposed in a cylindrical metal tube that has a common straight gas generation and piston travel bore so that a inexpensive metal tube rather than a complex casting can be used. A cable is connected at one end to the piston and passes through a cable deflection device having a locking device for locking the cable against travel in a reverse direction after tightening the seat belt system. The locking device may be an inexpensive, one-piece wedge-shaped clamping or gripping device which transfers the high tensile forces from the passenger's body pulling on the cable through the deflection device to a vehicle anchorage rather than through a locking device which is disposed within the cylinder tube which must have tube walls sufficiently strong to withstand such high tensile forces.
Owner:JOYSON SAFETY SYST ACQUISITION LLC

Portable combustion-engined power tool and a method of operating same

A method of controlling operation of a portable, combustion-engined, power tool and including feeding fuel into the combustion chamber of the power tool, before ignition, several times one after another in accordance with an intermittent metering operational mode, and a power tool including a control device (34, 64) for controlling operation of the fuel feeding device (32, 33) of the power tool so that the feeding device (32, 33) feeds the fuel into the combustion chamber (1) several times in accordance with the intermittent metering operational mode.
Owner:HILTI AG

Device for opening a passenger door in case of emergency

The invention relates to a device for opening a passenger door (1) of an aircraft in case of emergency, which is fastened so it is manually pivotable on the fuselage (3) of the aircraft via a hinge and / or support arm configuration (2), an auxiliary-energy-operated emergency opening drive (4) being provided between the fuselage (3) and the passenger door (1), which automatically opens the passenger door (1) in accordance with an emergency control unit (5), the auxiliary energy for the emergency opening drive (4) being pyrotechnic energy, whose gas expanding inside an expansion chamber (6) after triggering by the emergency control unit (5) impinges the emergency opening drive (4) with pressure medium to open the passenger door (1), wherein said emergency opening drive (4) generates a rotational movement.
Owner:AIRBUS HELICOPTERS DEUT GMBH

Retractable steering mechanism

A retractable steering mechanism includes a steering wheel, a steering column connected to the steering wheel, a telescopic device connected to steering column, a connector for connecting the telescopic device to two front wheels of the vehicle. A first cover is connected to the vehicle. A second cover is connected to the first cover and includes at least two slots defined therein. A shell is used to house the steering column so that the steering column is rotational but not movable in the shell. The shell includes at two bosses formed thereon and movably disposed in the slots. A moving unit is provided between the vehicle and the shell and operable, in a car accident, to retract and tilt the shell due to the bosses moving in the slots.
Owner:FONG

Autonomous gas powered ram

The present invention provides an autonomous ram that comprises a first body having a first internal cavity and a first piston mounted therein. The first piston is attached to an actuator for moving the actuator between a first operative position and a second operative position. The ram further comprises a second body mounted within the first internal cavity. The second body comprises a second internal cavity that is defined by an internal wall having a locking portion. An explosive charge is located in the second internal cavity and is adapted for detonating in response to an impulse. A second piston located within the second internal cavity is operative for causing a rod to move from a first position to a second position in response to the detonation of the explosive charge. The displacement of the rod causes the actuator to move towards the second operative position. In the second position the rod is engaged with the locking portion of the second body.
Owner:DAUNAS YVES
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