Delphi Technologies, Inc.

Jurgen Knauss

Gerhard Kordel

Uwe Brede

Anton Bretfeld

Diedrich Von Behr

Eduard Berenz

Harald Frank

Reinhold Meisinger

A pyromechanical disconnecting device, in particular for battery shutoff in a motor vehicle include a housing () in which there is arranged a conductor bus () that is designed to be severable by a cutting chisel () at a predetermined cut point, the cutting chisel being capable of being accelerated by the propellant gases of an ignition element (). In order to facilitate assembly it is proposed that the housing () be extruded around the ignition element (), which in this way forms one structural unit with the housing ().

Housing for a pyromechanical disconnecting device with integrated ignition element

A pyromechanical cutting element has a housing () in which an electrical conductor () is arranged, a cutting plunger () with a cutting tool () to cut through the electrical conductor (), and pyrotechnic charge () to drive the cutting plunger (), with the cutting tool () bending over the electrical conductor () after cutting through it and forming a bending tongue () that sticks out from the conductor () in a way that interrupts the conductor (). The electrical conductor () has a cross-sectional area reduction in the longitudinal direction () consisting of two transverse sides and two longitudinal sides. The cutting tool () first cuts through the cross-sectional area reduction () just on one transverse side and upon further advancement bends over the longitudinal sides at least in part, and, upon further advancement, the cutting tool () clamps the bending tongue () thus created.

Pyromechanical cutting element

The invention relates to a pyromechanical disconnecting device having a housing () in which an electrical conductor () is arranged, having a cutting plunger () and a cutting chisel () made of plastic arranged thereon for severing the electrical conductor (), and having a pyrotechnic igniter () in which a pyrotechnic charge is arranged for driving the cutting plunger (), the cutting chisel () having an edge that slides along a mating edge of the housing () or of a component () of the housing () when the cutting plunger () or the cutting chisel () is driven and when the electrical conductor () is severed. In order to achieve better cutting power, it is proposed that the edge of the cutting chisel () and/or the mating edge of the housing () or of a component () of the housing () comprise an inserted structural element () having a greater hardness than plastic.

Chisel for a pyromechanical disconnecting device

A pyrotechnic cutting device has a guiding housing in which there is arranged a part to be severed, which is fashioned so as to be severable at a cut point by a cutting tool having a cutting chisel. A pressure pulse generator containing a pyrotechnic driving charge is arranged in the cutting device for generating a pressure pulse to drive the cutting tool. In the guiding housing there is arranged, between the pressure pulse generator and the cutting tool, an impact capsule that can be accelerated by the pressure pulse of the triggered pressure pulse generator toward an inner thrust base of the cutting tool on the end of the cutting tool opposite to the cutting chisel. The cutting tool has its cutting chisel abutting the cut point before the impact capsule strikes the thrust base.

Pyrotechnically driven device for cutting solid, compact materials

The invention relates to a pyrotechnic detonator with an igniter support of plastic, which bears an ignition element. A cylindrical metal housing is fastened to the igniter support, into which the ignition reaches. A booster charge is arranged in the metal housing. To improve seal tightness and lower the manufacturing costs, for mechanical support a metal insert is integrated into the igniter support, the metal insert being encased by the plastic of the igniter support.

Pyrotechnic detonator with an igniter support of plastic with an integrated metal insert

A pyromechanical disconnecting apparatus, in particular for battery shutoff in a motor vehicle, includes a housing () in which there is arranged an electrically conductive conductor bus (), which is fashioned so as to be severable at a predetermined cut position () by a cutting chisel () driven by a pyrotechnic propellant charge. The conductor bus () is clamped in on its side facing away from the cutting chisel () by a locking bolt () inserted into the housing (), and a receiving space () is arranged in the locking bolt () in the region of the predetermined cut position (), into which receiving space the cutting chisel () bends the region of the conductor bus () severed by it, and the locking bolt () forms an external surface of the housing (). In order to diminish cracking of the locking bolt and housing and for purposes of inspection to determine whether the disconnecting apparatus has tripped, it is proposed that a recess () be arranged in the locking bolt (), which recess transpicuously connects the receiving space () with the atmosphere.

Growing community of inventors

Obermichelbach, Germany

Jurgen Knauss