KR20080017027A - Assemblies including extendable, reactive charge-containing actuator devices - Google Patents

Abstract

An assembly including a support housing and an actuator device. The actuator device includes an extendable initiator cup including at least one non-random fold and at least in part defining a storage chamber containing a reactive charge reactable to produce reaction products. The extendable initiator cup is folded to form a pocket that contains a portion of a moveable element. The extendable initiator cup longitudinally extends from a first length to a second, greater length upon reaction initiation of the reactive charge. The extendable initiator cup and the moveable element are at least partially disposed within a longitudinally extending bore of the support housing. The extending initiator cup moves the moveable element within the bore. The support housing is effective to limit lateral expansion of the extendable initiator cup upon reaction initiation of the reactive charge.

Description

Assemblies including extendable, reactive charge-containing actuator devices

[Cross Reference of Related Application]

This application is a partial continuing application of US Application No. 10 / 729,702, filed December 5, 2003, and US Application No. 10 / 729,702 is a partial continuing application, US Application No. 10 / 193,414, filed July 11, 2002. Application. The parent patent application is incorporated herein by reference in its entirety, including but not limited to the portions specifically described below.

[Technical Field]

Generally, the present invention provides for electrically connecting conductive members, such as electrical lines, circuits, and wires, and electrical switches associated with electrical conductive members. Or an actuator device useful for disconnecting. In particular, the present invention suitably electrically connects an electrical system such as, for example, an automotive electrical system, when receiving an electrical signal in response to a predetermined condition such as, for example, a short circuit or an automobile crash. An assembly comprising a pyrotechnic-based actuator device for releasing or connecting.

Dimple motors have been developed as "small actuators". Dimple motors are self-contained chemical actuators that have a shaped, concave, or dimpled canister. The dimple motor may be operated by an electrical signal that activates a chemical material (powder) stored or contained in a dimpled canister. The activated chemical material produces a reaction product that causes the corrugated and concave end of the corrugated canister to "pop" outward, resulting in a convexly shaped corrugated canister end. Typically dimple motors have a short, limited stroke, ie, a distance at which their corrugated surface extends or “pops out” during operation, so dimple motors have been used only in limited applications. The stroke of the dimple motor depends on the size of the corrugated canister containing the chemical material. The stroke to storage ratio is the ratio of stroke length to the size of the corrugated canister that stores the chemical material. Typically dimple motors have a low stroke to reservoir ratio, which is generally less than one.

As will be appreciated, if the rupture or opening of a canister or chamber comprising a reaction product and / or a chemical material formed in the chamber or canister is not required or intended, the intention of the chemical material or product formed thereby In addition to unintended leakage, it may result in that the device fails to operate in the intended manner.

In order to achieve a movement with a stroke that is generally longer than the stroke obtainable in a conventional dimple motor, actuator devices with features similar to bellows have been developed. Upon receiving an electrical signal, the chemical material reacts to produce gas and / or pressure, causing a portion of the device to extend. In practice, such an actuator device must be made of a material having a sufficiently high strength and thickness to prevent rupture during reaction of the chemical material contained therein. As will be appreciated, such requirements can exacerbate both the cost and / or weight of such components or either one of them. In this regard, automakers have sought to minimize the weight of components without sacrificing quality and safety.

Accordingly, there is a need for an efficient, relatively inexpensive and lightweight actuator device for properly electrically connecting or disconnecting an automotive electrical system when receiving electrical signals in response to predetermined conditions such as short circuits or automobile crashes. In particular, there is a need for an actuator device assembly that enables an actuator device that is made of a thin and / or light weight material while preventing unwanted or unintended rupture. Furthermore, there is a need for an assembly comprising an actuator device capable of disengaging the electrical switch or otherwise cutting the conductive member by an electrical signal. More specifically, in an assembly comprising an actuator device for use in combination with an automotive electrical system that receives an electrical signal from a sensor upon occurrence of a predetermined condition, such as a short circuit or collision, to disengage or electrically disconnect the emergency power disengagement switch. There is also a demand.

It is a general object of the present invention to provide an improved chemically disengaged assembly of a chemical engineering having a lightweight actuator device that suppresses rupture and provides maximum operating performance of the actuator device.

A more specific object of the present invention is to solve one or more of the problems described above.

The general object of the invention can be at least partly achieved through an assembly comprising an actuator device. The actuator device includes an extendable initiator cup that at least partially defines a storage chamber containing a reactable charge to produce a reaction product. The extendable initiator cup includes at least one non-random fold. The actuator device also includes at least one electrical connector in reaction initiating communication with the reactive charge. The extensible initiator cup has a first length before initiation of the reaction of the reactive charge, and at the initiation of the reaction of the reactive charge, the extendable initiator cup extends in the longitudinal direction to have a second length. The second length is greater than the first length. The assembly further includes a support housing comprising a longitudinally extending bore. The extendable initiator cup is at least partially disposed within the bore. The support housing effectively limits the lateral expansion of the extendable initiator cup at the start of the reaction of the reactive charge.

The prior art does not disclose an assembly that provides maximum operation from the actuator device by limiting the lateral expansion of the actuator device expanding in the longitudinal direction. In addition, the prior art does not disclose an assembly that provides maximum performance without rupture of the extendable initiator cup by controlling the stroke length of the actuator device expanding in the longitudinal direction.

The present invention also encompasses an assembly comprising an actuator device. The actuator device includes an extendable initiator cup having a cup end wall at one end of the cup side wall. The extendable initiator cup at least partially defines a storage chamber containing a reactive charge that can react to produce a reaction product. The cup sidewall includes a fold, such that the first portion of the cup sidewall and the second side of the cup sidewall overlap to form a pocket defined by the cup end wall and the second portion of the cup sidewall. The actuator device also includes at least one electrical connector in initiating reaction communication with the reactive charge. The extendable initiator cup has a first length before initiation of the reaction of the reactive charge and extends longitudinally to be a second length greater than the first length at the start of the reaction of the reactive charge. The assembly also includes a support housing comprising a movable element disposed at least partially in the bag and initiation of a longitudinally extending bore prior to initiation of the reaction of the reactive charge. Each of the extendable initiator cup and the movable element is at least partially disposed within the bore.

The invention further encompasses an assembly comprising an actuator device, the device including an extendable initiator cup having a cup end wall at one end of the cup side wall. The extendable initiator cup at least partially defines a storage chamber containing a reactive charge that can react to produce a reaction product. The cup sidewall includes a fold, such that the first portion of the cup sidewall and the second portion of the cup sidewall overlap, with both the first and second portions of the cup sidewall disposed parallel to the longitudinal axis of the actuator device. The actuator device also includes at least one electrical connector in reaction initiation communication with the reactive charge. The extendable initiator cup has a first length before initiation of the reaction of the reactive charge and extends longitudinally to be a second length greater than the first length at the start of the reaction of the reactive charge. The assembly also includes a movable housing including a first end disposed adjacent to the cup end wall, and a support housing including a longitudinally extending bore. Each of the extendable initiator cup and the movable element is at least partially disposed inside the bore. The support housing effectively limits the lateral expansion of the extendable initiator cup at the start of the reaction of the reactive charge.

Furthermore, the present invention encompasses an assembly for blocking the conduction of electricity through the conductive member. The assembly includes an actuator device comprising an extendable initiator cup, the extendable initiator cup having at least one non-random fold and comprising a reactive charge that is reactive to produce a reaction product. At least partially define the storage chamber. The actuator device also includes at least one electrical connector in initiating reaction communication with the reactive charge. The extensible initiator cup has a first length before initiating the reaction of the reactive charge and extends in the longitudinal direction to have a second length at the onset of the reaction of the reactive charge. The second length is greater than the first length. The assembly further includes a support housing including a longitudinally extending bore. The extendable initiator cup is at least partially disposed in the bore. A housing end stop is connected to the support housing. The housing end stop is effective to limit the longitudinal expansion of the initiator cup, which is adjacent to the first end of the bore and extends upon initiation of the reaction of the reactive charge. The conductive member is at least partially disposed between the extendable initiator cup and the housing end stop. The extensible initiator cup is arranged to interrupt communication with the conductive member, and upon initiation of the reaction of the reactive charge, the extensible initiator cup extends to a second length to block the conduction of electricity through the conductive member.

As used herein, the "fold" of the extendable initiator cup is an overlap of two portions of the extendable initiator cup. The overlapping portions of the folds are surfaces facing each other (hereinafter referred to as "facing surfaces") that have surfaces that are in direct contact with each other, or the overlapping portions are facing surfaces separated by spaces or gaps. You can have "Non-random fold" means a fold having a clearly defined pattern, such as a pattern designed to achieve a desired result.

As used herein, the term "length direction" means the axial direction of an extendable initiator cup and / or actuator device, parallel to the desired and intended extension direction of the extendable initiator cup. Thus, the extendable initiator cup of the actuator device of the present invention extends in the longitudinal direction.

As used herein, “reaction initiation communication” should be understood to mean the relationship between an initiating component, such as an electrical connector, and a reactive material, such as a reactive charge, wherein the initiating component is reactable. It can cause a reaction of matter.

Furthermore, the term "blocking communication" herein should be understood to mean positioning of the conductive member of the actuator device of the present invention, wherein the actuator device is connected to the conductive member through the conductive member during operation of the actuator device. To cut off the flow of electricity.

"Disengaging communication" should be understood to mean the positioning of an electrical switch of an actuator device of the invention, wherein the actuator device engages the electrical switch directly or indirectly in operation. Will release, thus interrupting the flow of electricity through the electrical switch. Conversely, "engaging communication" means the positioning of an electrical switch of an actuator device of the invention, where the actuator device will engage the electrical switch directly or indirectly, when in operation, Thus electricity flow through the electrical switch will be allowed.

As used herein, the two components are said to be "electrically connected" when electricity conducted through one component can pass to another component. Conversely, when the electricity conducted through one component cannot pass to another component, the two components are said to be “electrically disconnected”.

As used herein, "adjacent" does not require direct contact between adjacent objects.

Other objects and effects will become apparent upon reading the following detailed description taken in conjunction with the appended claims and drawings by those skilled in the art.

1 is a partial cross-sectional view of an actuator device according to an embodiment of the present invention.

2A and 2B are plan views of an actuator device according to another embodiment of the present invention, in which FIG. 2A shows an actuator device in a pre-operation state by initiating a reaction of a reactive charge, and FIG. An actuator device is shown after operation.

3A and 3B are partial cross-sectional views of an assembly comprising a conductive member and an actuator device, in accordance with another embodiment of the present invention, and FIG. 3A illustrates an assembly in a state prior to operation of the actuator device by initiating a reaction of a reactive charge. 3b shows the assembly after operation of the actuator device by initiating the reaction of the reactive material of the actuator device.

4A and 4B are partial cross-sectional views of an assembly comprising an actuator device and an electrical switch, in accordance with another embodiment of the present invention, and FIG. 4A shows an assembly in a state prior to operation of the actuator device by initiating a reaction of reactive charged water. 4b shows the assembly after operation of the actuator device by initiating the reaction of the reactive material of the actuator device.

5A and 5B show a partial cross-sectional view of an assembly comprising an actuator device and an electrical switch, according to another embodiment of the invention, and FIG. 5A shows an assembly in a state prior to operation of the actuator device by initiating a reaction of a reactive charge. 5b shows the assembly after operation of the actuator device by initiating the reaction of the reactive material of the actuator device.

6A-6F are partial cross-sectional views of actuator devices in accordance with preferred embodiments of the present invention.

7A-7C are partial cross-sectional views of an assembly comprising an actuator device, in accordance with another embodiment of the present invention, wherein FIG. 7A shows an assembly in a state prior to operation of the actuator device by initiating a reaction of a reactive charge. FIG. 7B shows the assembly after operation of the actuator device by initiating the reaction of the reactive charge of the actuator device, and FIG. 7C shows the assembly after a time interval from after the actuator device is operated.

The present invention provides an assembly comprising an actuator device. As described in detail below, the assembly of the present invention is particularly useful for activating or deactivating electrical switches or for cutting conductive members that block electrical conduction.

The assembly of the present invention includes a support housing for the actuator device such that the extendable initiator cup of the actuator device can be preferably formed, constructed, or manufactured from a relatively thin and / or lightly loaded material. Such support is an important factor for obtaining maximum performance from the actuator device without resulting in unintended or unwanted rupture of the extendable cup. The assembly of the present invention provides a close fit between the outer surface of the extendable initiator cup and the lateral support, and / or is on the opposite side of the extension direction of the extendable initiator cup. Provided with firm rear support for the actuator device, disposed at the end of the. In many uses of such actuator devices, the longitudinally extendable cups of the actuator device are not radially supported (not deployed and not supported as in open air) and are not supported radially, rather than the extendable cups of a typical actuator device. Side walls tend to rupture due to the amount of chemical material loading and the amount of operation performed. Lateral expansion of the longitudinally extendable extendable initiator cup is generally undesirable because it can reduce the energy available for the desired longitudinal extension and can also break the extendable initiator cup. to be.

Controlling the stroke length is another important factor for obtaining maximum performance from the actuator device without bursting the extendable cup. In many uses of such actuator devices, the ends of the extendable initiator cups tend to rupture due to the loading of chemical material and the amount of operation performed. Thus, as described above, a material of high strength and / or of large thickness (and therefore generally heavier material) is needed to make an extensible cup for an actuator device that explodes in unsupported open air. Is common. Also, in order to limit undesirable lateral expansion and provide only a linear extension in the desired longitudinal direction, it is generally necessary to have a greater thickness of the rigid material and the extendable initiator cup for manufacturing. The use of a thinner and / or lighter weight material for the extendable initiator cup also has the advantage that the amount of reactive charge used to extend the extendable initiator cup may generally be lower.

An actuator device according to one embodiment is shown in FIG. 1, indicated by reference numeral 20. Actuator device 20 includes an extendable initiator cup 22 attached to a header body 24. Extendable initiator cup 22 and head 24 define a storage chamber 26 comprising a reactive charge 28 that is reactive for the production of reaction products. Optionally, a charge holder 29 is disposed within the storage chamber 26 and around the reactive charge 28. The electrostatic retainer 29 concentrates the reaction product from the initiated reactive charge 28 towards the end of the expandable initiator cup 22 on the opposite side of the head member 24.

The actuator device according to the invention generally comprises at least one electrical connector in reaction initiation communication with the reactive charge. As defined above, "response initiation communication" means that the electrical connector (s) initiate a reaction of the reactive charge when it receives an electrical signal from an associated electrical terminal. The actuator device 20 includes a pair of electrical connectors (represented by conductive pins 30 and 32, respectively) in reaction initiation communication with the reactive charge 26.

As shown in FIG. 1, the first conductive pin 30 is attached to the head member 24 with one end positioned within the small hole 34. An insulating material 36 in the small hole 34 may be used to separate and insulate the first conductive pin 30 from the head member 24. A second conductive pin 32, separate from the first conductive pin 30, is attached to the head member 32. As is known in the art, a bridgewire 38 may be used to connect the first conductive pin 30 to the head member 24 when the insulating material 36 is present, whereby the first The circuit between the conductive pins 30 and the second conductive pins 32 is closed. As will be appreciated, various electrical connector configurations known in the art can be used in the actuator device of the present invention.

Extendable initiator cups of the present invention may generally extend from the first length to the second length when the reaction of the reactive charge is initiated. At the start of the reaction, the reactive charge produces a reaction product, which allows the extendable initiator cup to extend from the first length to the second length. In other words, the extensible initiator cup has a first length before initiation of the reaction of the reactive charge and extends to the second length by initiation of the reaction of the reactive charge, the second length being greater than the first length.

Upon initiation, the reactive charge 28 reacts to produce a reaction product, which may extend the extendable initiator cup from the first length to the second length. As will be appreciated by those of ordinary skill in the art, the reactive charge 28 may comprise one or more known reactive charge materials, such as pyrotechnic, which may comprise conductive line fins ( It can be operated by the current introduced through 30, 32. The reactive charge 28 may comprise a fuel slurry and an oxidant slurry, which are mixed together and placed in the storage chamber 26. An example of a reactive charge useful in the actuator device of the present invention and known in the art is a mixture comprising zirconium and potassium perchlorate (ZPP). In one embodiment of the present invention, the reactive charge 28 is a powder and at least a portion of the powdered reactive charge 28 is filled around the bridged wire 38, which is responsible for loading the reactive charge 28. It is for keeping in sufficient working contact with the bridge type wire 38. In one embodiment of the invention, the reaction product may preferably comprise a gas.

In order to prevent the reaction product from escaping from the storage chamber 26 and extending the extendable initiator cup 22, the extendable initiator cup 22 is attached to the head member 24 and sealed storage chamber 26. It is preferable to form Preferably, the reactive charge 28 is present in an amount effective to extend the extendable initiator cup 22 at the start of the reaction. Extendable initiator cup 22 is preferably formed of a light weight and / or thin thickness material. In one embodiment of the invention, extendable initiator cup 22 is formed of a metal, for example stainless steel. As will be appreciated, the size, shape, configuration, and materials used in the manufacture of the actuator device and the extendable initiator cup may vary depending on the desired application. Similarly, the amount of reactive charge contained in the storage chamber may vary depending on the stroke, structure, and material of the extendable initiator cup, as well as at least the size of the storage chamber and the type of reactive load used.

Extendable initiator cups of the present invention include at least one non-random fold. The at least one non-random fold imparts extensibility to the initiator cup. As shown in FIG. 1, in one embodiment of the present invention, the extendable initiator cup 22 includes corrugations 40. The pleats 40 include more than one non-random fold in the extendable initiator cup 22, preferably a plurality of non-random folds, such that the side walls 42 of the extendable initiator cup 22 The outer surface of the substrate includes a plurality of alternating ridges 44 and grooves 46. The pleats 40 allow the extendable initiator cup 22 to extend from the first length to the second length, similar to the accordion. Upon initiation of the reaction of the reactive charge 28, the extendable initiator cup 22 of FIG. 1, shown as being in the first position, will extend to a second length greater than the first length. Pressure from the reaction product resulting from the reaction initiated reactive charge 28 causes the pleat 40 to at least partially widen and flatten, thereby extending the extendable initiator cup 22 to a second length.

2A shows an actuator device 120 according to another embodiment of the present invention. Actuator device 120 includes an extendable initiator cup 122 attached to head member 124. Extendable initiator cup 122 includes a pleat 140 and is in a non-extended state having a first length L1. Two conductive pins, indicated at 130 and 132, respectively, are connected to the head member 124 and in reaction communication with a reactive charge (not shown).

FIG. 2B shows the state after initiation of the reaction of the reactive charge (not shown) as the actuator device 120 of FIG. 2A. Extendable initiator cup 122 is in a longitudinally extended state with a second length L2 greater than the first length L1 shown in FIG. 2A. The reaction product resulting from the reaction of the reactive charge causes the extendable initiator cup 122 to extend longitudinally from the first length L1 to the second length L2. As shown in FIG. 2B, an increase in the length of the extendable initiator cup 122 results from the extension of the pleats 140 of the extendable initiator cup 122. In another embodiment of the present invention, the entire side of the extendable initiator cup may comprise a pleat, such that the entire side of the extendable initiator cup may extend.

The difference between the first length L1 and the second length L2, or the length at which the extendable initiator cup 122 extends, is the stroke of the actuator device 120. The stroke of the actuator device 120 shown in FIG. 2B is indicated by the length L3. In one preferred embodiment of the invention, the stroke of the extendable initiator cup, or the difference between the first length and the second length, is preferably between about 4 mm and about 8 mm. As will be appreciated, the actuator device according to the present invention preferably has an improved ratio of stroke to reservoir compared to typical known dimple motors. More specifically, the actuator device according to certain preferred embodiments of the invention advantageously has a ratio of stroke to reservoir greater than approximately 1.0, more preferably greater than approximately 5.0. As will be appreciated, the stroke of the actuator device of the present invention, and the ratio of stroke to reservoir, can vary depending on the size and structure, and the material of the extendable initiator cup, as well as the form and amount of the reactive charge.

The assembly of the present invention may comprise any of the actuator devices described herein and is particularly useful in combination with a conductive member such as an electric wire or an electric wire. In one embodiment of the invention, the assembly comprises a support housing that provides lateral support for the actuator device. The actuator device can function to block electrical conduction through the conductive member upon receiving an electrical signal. In one embodiment of the present invention, upon receiving an electrical signal through the electrical connector (s) the reaction of the reactive charge is initiated to produce a reaction product, the extendable initiator cup extending from the first length to the second length to conduct To block electrical conduction through the member. The lateral support provided by the support housing of the assembly enables the use of an actuator device comprising a thin thickness and / or light weight extendable initiator cup.

In one embodiment of the invention, the extensible initiator cup may perform the action of breaking electrical conduction through the conductive member by cutting the conductive member. 3A, an assembly 200 according to one embodiment of the present invention is shown, which includes an actuator device 220, a conductive member 250, and a support housing 260. Actuator device 220 includes an extendable initiator cup 222 having a pleat 240 and two electrically conductive pins 230, 232. In certain embodiments of the present invention, an optional cutting element can be used in combination with the actuator device to facilitate cutting of the conductive member. As shown in FIG. 3A, the cutter 248 is disposed at the end of the extendable initiator cup 222, between the extendable initiator cup 222 and the conductive member 250. The cutter 248 is preferably non-conductive for at least two purposes. First, when the extensible initiator cup 222 is formed of a conductive material such as a conductive metal, the current of the conductive member is conducted through the extensible initiator cup 222 to prevent the reactive load from operating. 248 may function to insulate extensible initiator cup 222. Second, cutter 248 separates the two resulting portions of the cut conductive member 250, as shown in FIG. 3B, and conducts electricity to the portion of the other conductive member cut from the cut portion of the conductive member. It can be a function to prevent it. The cutter according to the present invention may be formed of various materials, and may include various forms. For example, in one embodiment of the present invention, the cutter has a sharp edge adjacent to the conductor to facilitate cutting of the conductive member.

The support housing 260 includes a bore 262 extending in the longitudinal direction. In order for the support housing to hold the actuator device 220 in position relative to the conductive member 250, the actuator device 220 includes a bore 261 extending in the longitudinal direction. Retainer element 264 secures actuator device 220 within bore 262. The support housing 260 is effective to limit the lateral expansion of the extendable initiator cup 222 at the start of the reaction of the reactive charge. In one embodiment of the invention, the inner diameter across the bore is such that the support housing 260 of the extendable initiator cup 222 is effective to limit the lateral expansion of the extendable initiator cup 222. It has a size relative to the outer diameter. By limiting or eliminating the lateral expansion of the extendable initiator cup 222, the support housing concentrates the extension of the extendable initiator cup 222 toward the conductive member 250 in the desired longitudinal direction. The support housing 260 also limits, and preferably prevents, the rupture of the extendable initiator cup, such that the extendable initiator cup 222 may not be supported laterally or in the actuator device in open air. It is thus possible to form a thinner and / or lighter weight material than is possible. Furthermore, extendable initiator cups formed of thin and / or light weight materials can generally be extended with smaller amounts of reactive charges.

The extensible initiator cup 222 of the actuator device 220 is arranged in barrier communication with the conductive member 250. Positioning the extensible initiator cup 222 to "block communication" means that upon initiation of the reaction of the reactive charge within the actuator device 220, the extensible initiator cup 222 may be removed from the bore 262. It means that an extendable initiator cup is disposed relative to the conductive member 250 so as to extend longitudinally from one length to a second length to block electrical conduction through the conductive member. 3B shows the state of the assembly 200 of FIG. 3A after the actuator device 220 is operated. Extendable initiator cup 222 extends to a second length, and cutter 248 cuts conductive member 250. The non-conductive cutter 248 separates the two portions of the cut conductive member 250. In addition, the non-conductive cutter 248 does not conduct electricity, that is, does not bridge like a bridge between the gaps between the two portions of the cut conductive member 250.

The support housing 260 includes a housing end stop 266 adjacent to the first end 268 of the bore 262. The housing end stop 266 is positioned relative to the extendable initiator cup 222 to be effective to limit the longitudinal extension of the extendable initiator cup 222 at the start of the reaction of the reactive charge. Housing end stop 266 stops the extension of extendable initiator cup 222 at a predetermined, desired distance position less than the unsuppressed maximum extension of extendable initiator cup 222. Thus, the housing end stop 266 can be used to control the stroke length of the extendable initiator cup 222. Controlling the stroke length is an important factor for obtaining maximum performance (work) from the extendable initiator cup 22 and the actuator device 220.

As shown in FIGS. 3A and 3B, conductive member 250 is disposed over first end 266 of bore 262 and includes a cavity between conductive member 250 and end stop 266; 270 is formed. As shown in FIG. 3B, when the reaction of the actuator device 220 is initiated, the extendable initiator cup 22 extends in the longitudinal direction until the cutter 248 contacts the housing end stop 266. The cutter 248 is pushed into the cavity 270 to penetrate the conductive member 250. When the cutter 248 contacts the housing end stop 266, any further longitudinal extension of the extendable initiator cup 222 is stopped.

In one embodiment of the invention, the support housing and the housing end stop are integrally formed as one part. In another embodiment of the invention, the housing end stop is formed as a separate component connected to the support housing. One of ordinary skill in the art will appreciate, from the teachings provided herein, that various sizes, shapes, and structures of the support housing and the housing end stop can be used for certain embodiments of the assembly of the present invention. .

Housing end stop 266 shown in FIG. 3B includes an optional visual indicator 272. The visual indicator 272 allows the cutter 248 to contact the visual indicator 272 and push the visual indicator 272 outwards from the housing end stop 266 upon extension of the extendable initiator cup 222. In order to achieve this, it may be formed of a flexible material. Visual indicators can be used to indicate whether the actuator device has been detonated by indicating a short circuit and a portion of the electrical system that needs repair.

In another embodiment of the invention, the conductive member comprises an electrical switch and the extendable initiator cup of the actuator device is arranged to disengage from the electrical switch. In the case where the extendable initiator cup is disposed relative to the electrical switch, upon extension from the first length to the second length of the extendable initiator cup, the extendable initiator cup is subjected to electrical conduction through the electrical switch. The actuator device is “unengaged” with the electrical switch to shut off or disengage.

4A shows an assembly 300 according to another embodiment of the present invention. Assembly 300 includes an actuator device 320 that is combined with an electrical switch 352 of conductive member 350. Actuator device 320 includes an extendable initiator cup 322 having a pleat 340, and two electrically conductive pins 330, 332, respectively. The electrical switch 352 includes a first electrical contact 354 electrically connected to a second electrical contact 356. The first and second electrical contacts 354, 356 are “electrically connected” when a current can be conducted from one electrical contact to another.

Assembly 300 also includes a support housing 360 that includes a longitudinally extending bore 362. The actuator device 320 is disposed in the longitudinally extending bore 361 such that the support housing keeps the actuator device 320 in position relative to the electrical switch 352. Retainer element 364 secures actuator device 320 within bore 362. At the beginning of the reaction of the reactive charge, the support housing 360 is effective to limit the lateral expansion of the extendable initiator cup 322. The inner diameter across the bore 362 has a dimension that fits against the outer diameter of the extendable initiator cup 322, and preferably has a dimension that is only slightly larger than the outer diameter of the extendable initiator cup 322. The support housing 360 can effectively limit the lateral expansion of the extendable initiator cup 322. By limiting or preventing lateral expansion of the extendable initiator cup 322, the support housing concentrates the extension of the extendable initiator cup 322 in the desired longitudinal direction towards the electrical switch 352. The support housing 360 also limits, and preferably prevents, the rupture of the extendable initiator cup 322 such that the actuator is not supported laterally or is in open air. It is possible to form a thinner and / or lighter weight material than is possible with the device.

As described above, the extendable initiator cup 322 of the actuator device 320 is arranged to disengage from the electrical switch 252. In FIG. 4B, the assembly 300 of FIG. 4A is shown but the post-operation state of the actuator device 320 is shown. Actuator device 320 receives electrical signals from electrical terminals (not shown) via conductive pins 330 and 332, whereby reactive charges in the storage chamber react to produce a reaction product, which is an extensible initiator cup. By causing 322 to extend from the first length shown in FIG. 4A to the second length shown in FIG. 4B, the first electrical contact 354 and the second electrical contact 356 are electrically disconnected. In one embodiment of the invention shown in FIGS. 4A and 4B, an extendable initiator cup 322 extends to electrically disconnect the second electrical contact 356 from the first electrical contact 354.

The support housing 360 includes a housing end stop 366 adjacent and disposed over the first end 368 of the bore 362. The longitudinal extension of the extendable initiator cup 322 to the second length at the onset of the reaction of the reactive charge becomes possible, and also the total extension length that can be achieved by the extendable initiator cup 322. To be less effectively constrained, the housing end stop 366 is disposed relative to the extendable initiator cup 322. As shown in FIGS. 4A and 4B, electrical switch 352 of conductive member 350 is disposed over bore 362 in cavity 370 formed between bore first end 366 and end stop 366. do. As shown in FIG. 4B, upon initiation of the reaction of the actuator device 320, the extendable initiator cup 322 extends longitudinally towards the housing end stop 366 and into the cavity 370. The second electrical contact 356 is disconnected from the first electrical contact 354. As shown in FIG. 4B, extendable initiator cup 322 pushes second electrical contact 356 into end stop 366. The housing end stop 366 stops further longitudinal extension of the extendable initiator cup 322, which extends the extendable initiator cup 322 to the first electrical contact 354 and the second electrical contact ( 356) maintains an electrical disconnect state therebetween.

As mentioned above, the support housing bore provides lateral support for the extendable initiator cup and generally prevents lateral expansion and rupture. However, as will be appreciated by those of ordinary skill in the art, in the broad practical application of the present invention, upon initiation of the reaction of a reactive charge, the extensible initiator cup is partially It may extend beyond the end of the support housing bore. Such an embodiment is shown in FIG. 4B, where a portion of the extendable initiator cup 322 extends beyond the first end 368 of the bore 362. The highest pressure in the extendable initiator cup occurs immediately before extension of the extendable initiator cup. As the extendable initiator cup is extended, the volume of the storage chamber containing the reactive charge increases. As one of ordinary skill in the art will appreciate from the disclosure herein, the need for lateral support provided by the support housing is generally due to the pressure reduction as the extendable initiator cup 322 is extended. Decreases. Therefore, in certain preferred embodiments of the present invention, as shown in FIGS. 4A and 4B, an extensible initiator cup may extend beyond the end of the bore.

As will be appreciated by those of ordinary skill in the art from the teachings provided herein, the assembly according to the present invention has many applications in which conductive members need to be cut or otherwise disconnected under predetermined conditions. Useful in the field. The actuator device of the assembly of the present invention may be connected to a sensor device such as one or more of various sensors used in sensing various conditions and known in the art. When such a sensor senses a particular condition, an electrical signal is transmitted through an electrical terminal attached to the electrical connector (s) (eg conductive pins) of the actuator device. This activates the actuator device and extends the extendable initiator cup to disengage the electrical switch, thereby cutting off the conductive member or otherwise blocking the flow of electricity through the conductive member. For example, in one embodiment of the present invention, the electrical switch is an emergency power disengagement switch that includes first and second electrical contacts. Emergency power disengagement switches can be used in the automotive field, in the event of any conditions such as short circuits or collisions, an electrical signal is received by the actuator device and the extendable initiator cup is moved from the first length to the second length. By extending and electrically disconnecting the first and second electrical contacts of the electrical switch, possible fires are prevented.

While the invention has been described generally above with reference to embodiments in which the assembly according to the invention is adapted to block or disengage electrical communication to a particular system component, those of ordinary skill in the art It will be appreciated from the description provided herein that the field of application of the invention is not necessarily limited thereto. For example, according to another preferred embodiment of the present invention, an assembly according to the present invention can be used in combination with an electrical switch such that, if desired, the extendable initiator cup of the actuator device is placed in engagement with the electrical switch. have. For example, FIG. 5A shows an assembly 400 that includes an actuator device 420 in combination with an electrical switch 452 of conductive member 450.

As shown in FIG. 5A, the actuator device 420 includes an extendable initiator cup 422 having a pleat 440, and two electrically conductive pins 430, 432, respectively. Electrical switch 452 of conductive member 450 includes a first electrical contact 454 that is electrically disconnected from second electrical contact 456 to prevent current from passing from one electrical contact to another. . The actuator device 420 is disposed within the longitudinally extending bore 462 of the support housing 460 and remains in engagement with the electrical switch 452. Retainer element 464 secures actuator device 420 within bore 462. The support housing 460 includes a housing end stop 466 adjacent to and above the first end 468 of the bore 462. The housing end stop 466 is such that, upon initiating the reaction of the reactive charge, the longitudinal extension of the extensible initiator cup 422 is less than the maximum extension length that can be achieved by the extensible initiator cup 422. Limit effectively. The electrical switch 452 is disposed in the cavity 470 between the housing end stop 466 and the bore first end 468.

Actuator device 420 receives electrical signals from electrical terminals (not shown) via conductive pins 430 and 432, whereby reactive charges in the storage chamber react to produce a reaction product, the reaction product being extensible. The initiator cup 422 extends longitudinally from the first length shown in FIG. 5A to the second length shown in FIG. 5B, thereby electrically connecting the first electrical contact 454 and the second electrical contact 456. And allow the electrical switch to engage, thereby allowing electrical flow between the first and second electrical contacts 454, 456. In one embodiment of the invention shown in FIGS. 5A and 5B, an extendable initiator cup 422 is extended to electrically connect the second electrical contact 456 to the first electrical contact 454. The first and second electrical contacts 454, 456 are held together between the housing end stop 466 and the extendable initiator cup 422.

As one of ordinary skill in the art will appreciate from the teachings provided herein, many different forms of non-random folds can be used in the extendable initiator cup of the present invention. For example, FIGS. 6A-6F show forms of extendable initiator cups that include at least one non-random fold in accordance with various alternative embodiments of the present invention. As one of ordinary skill in the art will appreciate from the descriptions herein, additional forms for the support housing of the assembly of the present invention and the longitudinally extending bore therein are provided for the specific implementation of the actuator device. It may be necessary and / or desirable for examples.

6A shows an actuator device 520a in accordance with one embodiment of the present invention. The actuator device 520a includes an extendable initiator cup 522a and two conductive pins 530a and 532a connected to the load retainer 529a. Actuator device 520a has a longitudinal axis 535a that extends through the center of actuator device 520a and is substantially parallel to conductive pins 530a and 532a. Extendable initiator cup 522a includes a non-random fold 540a. Fold 540a includes a first portion 542a of extendable initiator cup 522a and a second portion 544a of extendable initiator cup 522a. The bend 546a of the extendable initiator cup 522a forms an overlap of the first portion 542a and the second portion 544a. The bend 546a causes the second portion 544a to overlap and contacts the inner surface 548a of the first portion 542a. In the fold 540a shown in FIG. 6A, both the first portion 542a and the second portion 544a of the extendable initiator cup 522a are disposed to be substantially perpendicular to the longitudinal axis 535a. . Upon initiation of the reaction of the reactive charge (not shown) in the actuator device 520a, the pressure resulting from the reaction product causes the fold 540a to at least partially unfold so that the extendable initiator cup 522a may be the first. Extend from the length to a second length that is greater than the first length.

6B shows an actuator device 520b according to another embodiment of the present invention. Actuator device 520b includes an extendable initiator cup 522b and two conductive pins 530b and 532b connected to a load retainer 529b. Actuator device 520b has a longitudinal axis 535b that extends through the center of actuator device 520b and is substantially parallel to conductive pins 530b and 532b. Extendable initiator cup 522b includes a non-random fold 540b. Fold 540b includes a first portion 542b of extendable initiator cup 522b and a second portion 544b of extendable initiator cup 522b. The bend 546b of the extendable initiator cup 522b forms an overlap of the first portion 542b and the second portion 544b. The bend 546b causes the second portion 544b to overlap the inner surface 548b of the first portion 542b. In the fold 540b shown in FIG. 6B, both the first portion 542b and the second portion 544b of the extendable initiator cup 522b are disposed to be substantially parallel to the longitudinal axis 535b. . In the embodiment shown in FIG. 6B, the extendable initiator cup 522b is folded back into its own, ie, retracted, to form a pocket. Upon initiation of the reaction of the reactive charge (not shown) in the actuator device 520b, the pressure resulting from the reaction product causes the fold 540b to at least partially unfold, thereby extending the first expandable initiator cup 522b. Extend from the length to a second length that is greater than the first length.

6C shows an actuator device 520c in accordance with one embodiment of the present invention. Actuator device 520c includes an extendable initiator cup 522c and two conductive pins 530c and 532c connected to a load retainer 529c. Actuator device 520c has a longitudinal axis 535c extending through the center of actuator device 520c and substantially parallel to conductive pins 530c and 532c. Extendable initiator cup 522c includes two non-random folds. First fold 540c includes a first portion 542c of extendable initiator cup 522c and a second portion 544c of extendable initiator cup 522c. The first bend 546c of the extendable initiator cup 522c forms an overlap of the first portion 542c and the second portion 544c. The first bend 546c causes the second portion 544c to overlap the outer surface 549c of the first portion 542c. In the first fold 540c shown in FIG. 6C, both the first portion 542c and the second portion 544c of the extendable initiator cup 522c are substantially parallel to the longitudinal axis 535c. Is placed.

Extendable initiator cup 522c also includes a non-random second fold 550c. The second fold 550c includes a second portion 544c of the extendable initiator cup 522b and a third portion 552c of the extendable initiator cup 522b. The second bend 556c of the extendable initiator cup 522c forms an overlap of the second portion 544c and the third portion 552c. The second bend 556c causes the third portion 552c to overlap the inner surface 558c of the second portion 544c. In the second fold 550c shown in FIG. 6C, the second portion 544c and the third portion 552c of the extendable initiator cup 522c are also disposed substantially parallel to the longitudinal axis 535c. . Upon initiation of the reaction of the reactive charge (not shown) in the actuator device 520c, the resulting pressure from the reaction product causes the first fold 540c and the second fold 550c to at least partially unfold, This extends the extendable initiator cup 522c from the first length to a second length greater than the first length.

6D shows an actuator device 520d according to another embodiment of the present invention. Actuator device 520d includes an extendable initiator cup 522d and two conductive pins 530d and 532d connected to load retainer 529d. Actuator device 520d has a longitudinal axis 535d that extends through the center of actuator device 520d and is substantially parallel to conductive pins 530d and 532d. Extendable initiator cup 522d includes three non-random folds. First fold 540d includes a first portion 542d of extendable initiator cup 522d and a second portion 544d of extendable initiator cup 522d. The first bend 546d of the extendable initiator cup 522d forms an overlap of the first portion 542d and the second portion 544d. The first bend 546d causes the second portion 544d to overlap the inner surface 548d of the first portion 542d. In the first fold 540d shown in FIG. 6D, both the first portion 542d and the second portion 544d of the extendable initiator cup 522d are substantially perpendicular to the longitudinal axis 535d. Is placed.

Extendable initiator cup 522d also includes a non-random second fold 550d. The second fold 550d includes a second portion 544d of the extendable initiator cup 522d and a third portion 552d of the extendable initiator cup 522d. The second bend 556d of the extendable initiator cup 522d forms an overlap of the second portion 544d and the third portion 552d. The second bend 556d causes the third portion 552d to overlap the outer surface 559d of the second portion 544d. In the second fold 550d shown in FIG. 6D, the second portion 544d and the third portion 552d of the extendable initiator cup 522d are also disposed substantially perpendicular to the longitudinal axis 535d. .

Extendable initiator cup 522d also includes a non-random third fold 560d. The third fold 560d includes a third portion 552d of extendable initiator cup 522d and a fourth portion 554d of extendable initiator cup 522d. The third bend 566d of the extendable initiator cup 522d forms an overlap of the third portion 552d and the fourth portion 554d. The third bend 566d causes the fourth portion 554d to overlap the inner surface 568d of the third portion 552d. In the third fold 560d shown in FIG. 6D, the third portion 552d and the fourth portion 554d of the extendable initiator cup 522d are also disposed substantially perpendicular to the longitudinal axis 535d. . Upon initiation of the reaction of the reactive charge (not shown) in the actuator device 520d, the pressure from the resulting reaction product is first fold 540d, second fold 550d, and third fold 560d. Causes each to at least partially unfold, thereby extending extendable initiator cup 522d from a first length to a second length greater than the first length.

6E shows an actuator device 520e in accordance with another embodiment of the present invention. The actuator device 520e includes an extendable initiator cup 522e and two conductive pins 530e and 532e connected to the load retainer 529e. Actuator device 520e has a longitudinal axis 535e extending through the center of actuator device 520e and substantially parallel to conductive pins 530e and 532e. Extendable initiator cup 522e includes two non-random folds. First fold 540e includes a first portion 542e of extendable initiator cup 522e and a second portion 544e of extendable initiator cup 522e. The first bend 546e of the extendable initiator cup 522e forms an overlap of the first portion 542e and the second portion 544e. The first bend 546e causes the second portion 544e to overlap the inner surface 549e of the first portion 542e. Space 570e separates the opposing surfaces of overlapping first portion 542e and second portion 544e. In the first fold 540e shown in FIG. 6E, both the first portion 542e and the second portion 544e of the extendable initiator cup 522e are substantially parallel to the longitudinal axis 535e. It is arranged to be.

Extendable initiator cup 522e also includes a non-random second fold 550e. The second fold 550e includes a second portion 544e of the extendable initiator cup 522e and a third portion 552e of the extendable initiator cup 522e. The second bend 556e of the extendable initiator cup 522e forms an overlap of the second portion 544e and the third portion 552e. The second bend 556e causes the third portion 552e to overlap the outer surface 559e of the second portion 544e. Space 580e separates overlapping second portion 544e and third portion 552e. In the second fold 550e shown in FIG. 6E, the second portion 544e and the third portion 552e of the extendable initiator cup 522e are also disposed substantially parallel to the longitudinal axis 535e. . Upon initiation of the reaction of the reactive charge (not shown) in the actuator device 520e, the resulting pressure from the reaction product causes the first fold 540e and the second fold 550e to at least partially unfold, The extendable initiator cup 522e extends from the first length to a second length greater than the first length.

Figure 6f shows an actuator device 520f in accordance with another embodiment of the present invention. Actuator device 520f includes an extendable initiator cup 522f and two conductive pins 530f and 532f connected to a load retainer 529f. Actuator device 520f has a longitudinal axis 535f that extends through the center of actuator device 520f and is substantially parallel to conductive pins 530f and 532f. Extendable initiator cup 522f includes two non-random folds. The first fold 540f includes a first portion 542f of extendable initiator cup 522f and a second portion 544f of extendable initiator cup 522f. The first bend 546f of the extendable initiator cup 522f forms an overlap of the first portion 542f and the second portion 544f. Actuator device 520f has a configuration similar to actuator device 520e shown in FIG. 6E. However, the first bend 546f shown in FIG. 6F allows the second portion 544f to overlap and directly contact the inner surface 547f of the first portion 542f. In other words, there is no space between the facing surfaces of the overlapping first portion 542f and the second portion 544f. In the first fold 540f shown in FIG. 6F, both the first portion 542f and the second portion 544f of the extendable initiator cup 522f are substantially parallel to the longitudinal axis 535f. Is placed.

Extendable initiator cup 522f also includes a non-random second fold 550f. The second fold 550f includes a second portion 544f of the extendable initiator cup 522f and a third portion 552f of the extendable initiator cup 522f. The second bend 556f of the extendable initiator cup 522f forms an overlap of the second portion 544f and the third portion 552f. Space 580f separates the opposing surfaces of overlapping second portion 544f and third portion 552f. Upon initiation of the reaction of the reactive charge (not shown) in the actuator device 520f, the resulting pressure from the reaction product causes the first fold 540f and the second fold 550f to at least partially unfold, This extends the extendable initiator cup 522f from the first length to a second length greater than the first length.

Those skilled in the art and guided by the teachings provided herein, from the foregoing, the broad practical application of the invention necessarily includes certain non-random folding (s) or patterns. It will be appreciated that this is not limited to extendable initiator cups. Furthermore, extensible initiator cups comprising other specific non-random folds (s) will be guided by the teachings provided herein and will be apparent to those of ordinary skill in the art.

7A-7C illustrate an assembly 600 according to another embodiment of the present invention. Assembly 600 includes an actuator device 620 in combination with a moveable element 648 and support housing 660.

The actuator device 620 includes an extendable initiator cup 622 having a cup end wall 624 at the end 626 of the cup sidewall 628. Extendable initiator cup 622 is attached to head member 630 at an opposing end 629 to define and enclose a hermetically sealed storage chamber 632. Reactive charge 634, preferably a chemical, that can react to produce a reaction product is received in storage chamber 632. Actuator device 620 includes an electrical connector 636 that is in reaction communication with a reactive charge 634.

As shown in FIG. 6B and described above, the extensible initiator cup 622 is retracted, ie rolled back inside of itself, to form a pocket 640. The sidewall 628 of the extendable initiator cup includes a fold 642, where the second portion 644 of the cup sidewall bends back inward and overlaps the first portion 646 of the cup sidewall. As shown in FIG. 7A, the first portion 646 and the second portion 644 of the cup sidewall 628 are disposed parallel to the longitudinal axis 650 of the actuator device 620. Pouch 640 is defined by cup end wall 624 and second portion 644 of cup sidewall 628. Pouch 640 is open at the opposite end of end wall 624.

The support housing 660 includes a bore 662 extending in the longitudinal direction. The actuator device 620 is disposed at one end of the bore 662 extending in the longitudinal direction. The inner diameter across the bore 662 is dimensioned relative to the outer diameter of the extendable initiator cup 622, preferably slightly larger than the outer diameter of the extendable initiator cup 622. At the onset of reaction of the reactive charge 634, the support housing 660 is effective to limit the lateral expansion of the extendable initiator cup 622. As described above, by limiting or preventing lateral expansion of the extendable initiator cup 622, the support housing 660 concentrates the extension of the extendable initiator cup 622 in the desired longitudinal direction. In addition, the support housing 660 limits and preferably prevents rupture of the extendable initiator cup 622 such that the extendable initiator cup 622 is not laterally supported or is in open air. It may be formed of a thinner thickness and / or lighter weight material than is possible with an actuator device.

In addition, a moveable member 648 is disposed within the bore 662. The movable element 648 is partially disposed in the pocket 640 prior to initiation of the reaction of the reactive charge. In the embodiment shown in FIG. 7A, the movable element 648 includes a first end 664 disposed adjacent the cup end wall 624. As will be appreciated by those skilled in the art from the teachings provided herein, various sizes, shapes, configurations, and materials may be used for the movable element 648 as needed for a particular application. Can be. In the embodiment shown in FIGS. 7A-7C, the movable element is formed as a cylindrical fin and extends beyond the ends of the housing 660 and the bore 662 prior to the initiation of the reaction of the reactive charge 634. Alternatively, prior to initiation of the reaction, the movable element 648 may extend to the same height as the end of the bore 662 or only partially to the length of the bore 662, for example, FIG. It may be like the cutter 248 shown in 3a.

FIG. 7B shows the assembly 600 of FIG. 7A, showing the state after the actuator device 620 has been actuated. Actuator device 620 receives electrical signals from electrical terminals (not shown) via electrical connectors 636 and reactive charges 634 in storage chamber 632 react to react products, such as, for example, gases. Which causes the extendable initiator cup 622 to extend from the first length shown in FIG. 7A to the second length shown in FIG. 7C.

As shown in FIG. 7B, the reactive charge 634 reacts to produce a reaction product, which causes the extendable initiator cup 622 to extend within the bore 662. The reaction product preferably fills the storage chamber 632 and causes the cup sidewall folds 642 to unfold by unrolling motion, thereby allowing the second portion 644 of the overlapping cup sidewalls to fold. The size of the first portion 646 of the cup sidewall is increased while decreasing the size. Extendable initiator cup 622 is extended to extend to move or push movable element 648 through bore 662 in the direction of its extension. During the longitudinal extension of the extendable initiator cup 622, the reaction product pushes the cup end wall 624 relative to the first end 664 of the movable element to see the movable element 648. Move within.

Placing or nesting a portion of the end 664 of the movable element in the retracted pocket 646 of the extendable initiator cup 622 provides several advantages. Extendable initiator cup 622 is supported in pocket 640 by movable element 648 and laterally supported by support housing 660. Support provided by the housing 660 directs the extension of the extendable initiator cup 622 towards the end 668 of the bore 662. Preferably, while the fold 642 unfolds, the support of the pocket provided by the movable element 648 maintains the general shape or shape of the pocket 640, which is an end 668 of the bore 662. The unrolling of the fold 642 in the direction toward) increases or results in unrolling. The nested movable element 648 reduces or prevents undesired collapse of the pocket 640 during the longitudinal extension of the extendable initiator cup 622. The support provided by the nested and movable element 648 and / or the support housing 660 allows a high internal pressure to be used while reducing or preventing rupture of the extending initiator cup 622. It is desirable to. Preferably, high internal pressures can provide high actuating or working forces and / or increased extension rates. Furthermore, the effective stroke distance of the extendable initiator cup 622 and / or the movable element 648 may, for example, place the movable element adjacent to the extendable initiator cup 622. Increased by enveloping in the movable element 648 as compared to the case where it is not disposed in the pocket 640.

The support housing 660 includes a housing end stop 666 adjacent the first end 668 of the bore 662. The end stops 666 shown in FIGS. 7A-7C are separate end stops 666 attached to the support housing 660. A separate end stop 666 allows the actuator device 620 and the movable element 648 to be inserted into the bore 662 during assembly. In another embodiment of the present invention, the end stop 666 may be integrally formed with the support housing 660, such as for example the end stop 266 shown in FIGS. 3A and 3B. As shown in FIG. 7B, the extendable initiator cup 622 extends longitudinally towards the housing end stop 666.

As shown in FIGS. 7A-7C, the movable element 648 includes a radially extending protrusion 670, which preferably extends from the side of the movable member 648. As used herein, "radially extending" means the outward extension of the projection from the lateral side of the movable element, regardless of the shape of the movable element and / or the projection. For the protrusion 670, alternative sizes, shapes, and shapes may be used. Preferably, the protrusion 670 extends circumferentially around the outer surface of the movable element 648, but at least two disposed partially on and / or opposite sides about the movable element 648. Aligned protrusions may be used. As shown in FIG. 7C, the extendable initiator cup 622 pushes or extends the movable element 648 until the protrusion 670 contacts the housing end stop 666. Housing end stop 666 stops any further longitudinal extension of movable element 648 and extended extendable initiator cup 622. As will be appreciated by those skilled in the art from the teachings provided herein, for example, depending on the size and shape of the movable element, the extendable initiator cup, and / or the bore and the intended application The protrusions can be placed at various locations along the length of the movable element.

Assembly 600 may be used in applications such as the applications described above with respect to assemblies 200, 300, 400 or similar applications. In one embodiment of the invention, as shown in FIGS. 3A-3B, 4A-4B, and 5A-5B, the assembly 600 is extendable with the housing end stop 666 prior to initiation of the reaction. It may include a cavity disposed between the initiator cups 622. The cuttable member is provided with a support housing so that the movable element 648 can cut the severable member when the extendable initiator cup 622 is extended from the first length to the second length. 660 and through the cavity. In one embodiment of the invention, the cuttable member comprises a conductive member, such as the conductive members 250, 350, 450 described above. When used to cut the conductive member, it is preferable that the movable element is made of a non-conductive material. The movable element may comprise or be a sharp cutter to facilitate cutting of the cuttable member.

Accordingly, the present invention provides an assembly suitable for use in combination with a conductive member and / or an electrical switch. The assembly can provide lateral support for the actuator device and limit the longitudinal extension of the actuator device, thereby providing maximum working performance of the extendable initiator cup, limiting rupture, and also extending the initiator. Lighter weight and / or thinner materials may be used for the manufacture of the cup, and less reactive charge may be used.

The invention, which is suitably described herein, may be implemented without any elements, parts, steps, components, or components not specifically disclosed herein.

In the foregoing detailed description the invention has been described in connection with specific preferred embodiments and many details have been described for purposes of illustration, although those skilled in the art will appreciate that the invention may include other additional embodiments. It will also be appreciated that certain details described herein may be significantly modified without departing from the basic principles of the invention.

In general, the present invention can be used in an assembly that includes an actuator device useful for electrically connecting or disconnecting conductive members, such as electrical wires, circuits, and wires, and electrical switches associated with the conductive members. In particular, the present invention relates to a chemical process for suitably electrically disconnecting or connecting an electrical system, for example an automotive electrical system, when receiving an electrical signal in response to a predetermined condition such as a short circuit or a car crash. It can be used in an assembly that includes a base actuator device.

Claims (20)

An extendable initiator cup comprising a cup end wall at one end of the cup sidewall, the extendable initiator cup at least partially defining a storage chamber containing a reactive charge capable of reacting to produce a reaction product, The cup sidewall includes: an extendable initiator cup, including a fold, wherein the first portion of the cup sidewall and the second portion of the cup sidewall overlap to form a pocket defined by the cup end wall and the second portion of the cup sidewall; And at least one electrical connector in reaction initiating communication with the reactive charge; An extendable initiator cup having a first length prior to the initiation of the reaction of the reactive charge and extending longitudinally to be a second length greater than the first length at the onset of the reaction of the reactive charge; A movable element disposed at least partially within the bag prior to initiation of the reaction of the reactive charge; And And a support housing, each of the extendable initiator cup and the movable element disposed at least in part and comprising a longitudinally extending bore. The method of claim 1, An assembly wherein the movable element supports the bag at the start of the reaction of the reactive charge. The method of claim 1, Wherein both the first portion and the second portion of the cup sidewall are disposed parallel to the longitudinal axis of the actuator device. The method of claim 1, And wherein upon longitudinal extension of the extendable initiator cup the movable element extends beyond the bore of the support housing. The method of claim 1, Wherein the cup sidewall folds at least partially unfold upon longitudinal extension of the extendable initiator cup. The method of claim 1, The moveable element includes a radially extending protrusion. The method of claim 6, The assembly further includes a housing end stop disposed adjacent to the first end of the bore, wherein the movable element extends through the bore until the protrusion contacts the housing end stop upon extension of the extendable initiator cup. Moving, assembly. The method of claim 6, The protrusions extend circumferentially around the movable element. The method of claim 1, The movable element includes a pin. The method of claim 1, And the support housing effectively limits lateral expansion of the extendable initiator cup upon initiation of the reaction of the reactive charge. The method of claim 1, The storage chamber is hermetically sealed. The method of claim 1, The reaction product comprises a gas. The method of claim 1, The reactive load includes a pyrotechnic. The method of claim 1, The assembly is: A housing end stop disposed adjacent the first end of the bore; And A cavity for receiving a portion of the cutable member, the cavity being between the extendable initiator cup and the housing end stop; The movable element cuts the cuttable member when the extendable initiator cup extends from the first length to the second length. The method of claim 14, The cuttable member includes a conductive member. The method of claim 15, The moveable element includes a non-conductive material. An extendable initiator cup comprising a cup end wall at one end of the cup sidewall, the extendable initiator cup at least partially defining a storage chamber containing a reactive charge capable of reacting to produce a reaction product, The cup sidewall includes a foldable portion of which the first portion of the cup sidewall and the second portion of the cup sidewall overlap, with both the first portion and the second portion of the cup sidewall disposed parallel to the longitudinal axis of the actuator device. Initiator cup; And at least one electrical connector in reaction initiating communication with the reactive charge; An extendable initiator cup having a first length prior to the initiation of the reaction of the reactive charge and extending longitudinally to be a second length greater than the first length at the onset of the reaction of the reactive charge; A movable element comprising a first end disposed adjacent the cup end wall; And A support housing, each of the extendable initiator cup and the movable element disposed at least in part and comprising a longitudinally extending bore; And the support housing effectively limits lateral expansion of the extendable initiator cup upon initiation of the reaction of the reactive charge. The method of claim 17, During the longitudinal extension of the extendable initiator cup the reaction product pushes the cup end wall relative to the first end of the movable element to move the movable element in the bore. The method of claim 18, Wherein the cup sidewall folds at least partially unfold upon longitudinal extension of the extendable initiator cup. The method of claim 17, The movable element includes a radially extending protrusion, the support housing includes a housing end stop disposed adjacent to the first end of the bore, and upon extension of the extendable initiator cup the protrusion is extended to the housing end stop. The moveable element moves through the bore until in contact.

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