US3352189A - Explosive bolt - Google Patents
Explosive bolt Download PDFInfo
- Publication number
- US3352189A US3352189A US547077A US54707766A US3352189A US 3352189 A US3352189 A US 3352189A US 547077 A US547077 A US 547077A US 54707766 A US54707766 A US 54707766A US 3352189 A US3352189 A US 3352189A
- Authority
- US
- United States
- Prior art keywords
- cylindrical
- housing
- plunger
- propellant
- cylindrical housing
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
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Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F42—AMMUNITION; BLASTING
- F42B—EXPLOSIVE CHARGES, e.g. FOR BLASTING, FIREWORKS, AMMUNITION
- F42B3/00—Blasting cartridges, i.e. case and explosive
- F42B3/006—Explosive bolts; Explosive actuators
Definitions
- This invention relates to releasable components and more particularly to a bolt or like elements which may be instantly released from an associated member with which it is associated by means of an explosive charge.
- Explosive charges utilized in cooperating structures are presently known for efiecting the quick release of one piece of structure from another. Such devices are utilized in the aircraft industry for effecting the quick release of closures, canopies, auxiliary gas tanks, bombs, etc., positioned at remote locations. Such quick release means may be utilized in any type of installation where instantaneous release of assembled parts are required.
- FIGURE 1 shows a longitudinal sectional view of the device in an undetonated condition.
- FIGURE 2 shows a cross-sectional view taken through line 2-2 of FIGURE 1.
- FIGURE 3 shows a longitudinal sectional view of the device in a detonated condition.
- FIGURE 4 shows a cross-sectional view taken through line 44 of FIGURE 3.
- FIGURE 5 shows an exploded longitudinal sectional view of the device.
- the device comprises cylindrical housing 10, which contains a longitudinal coaxial bore 11 extending partially therethrough.
- Bore 11 comprises threaded section 13 at one end, shoulder E16, and reduced diameter 18, which terminates on surface 12 at the other end.
- Extending axially from the closed end of cylindrical housing 10 is cylindrical bolt 25, being separated therefrom by integral web 32.
- Cylindrical bolt 25 comprises a threaded end 29 and a smooth end 30 having a diameter substantially equal to reduce diameter 18 of bore 11.
- Cylindrical housing 10 and bolt 25 projecting therefrom are machined from one piece.
- the threaded end of bore 11 is suitably contoured to receive externally threaded cylindrical propellant housing 15.
- a threaded sealing compound may be utilized in order to assure a complete seal.
- Longitudinal coaxial bore 17 extends through propellant housing 15 to cylindrical detonation well 19, which contains explosive charge 24 as shown in FIGURE 1.
- Electric leads 14 pass through bore 17 and are embedded in explosive charge 20 in such a manner that the charge will be detonated when an electric current is caused to flow through the leads.
- Detonation well 19 is formed by the hollowed abutting ends of cylindrical propellant housing 15 and plunger 21, which comprises a cylindrical shaped object having a diameter equal to cylindrical propellant housing 15 at its hollowed abutting end and reduced diameter 22 at the other end.
- Seal 23 is positioned circumferentially on reduced diameter 22 so as to encompass a substantial portion thereof, and in an amount so that the combined diameter of the reduced section of the plunger and the seal is equal to the unreduced section of the plunger.
- the seal may be of any suitable material which possesses the characteristics of pliability and extrudability, e.g., rubber.
- a Tygon seal was tested and found to be effective.
- a gas sealed propelling arrangement comprising a cylindrical housing and bolt separated by an integral web, said cylindrical housing having a longitudinal coaxial partially threaded bore extending partially therethrough, an externally threaded cylindrical propellant housing encompassed within the cylindrical housing and suitably contoured so as to be compatible with the internally threaded section of the cylindrical housing, said propellant housing having a longitudinal coaxial bore extending therethrough which terminates into a hollowed end, a cylindrical plunger having a reduced diameter section encompassed within the unthreaded section of the cylindrical housing, said cylindrical plunger having a hollowed end abutting the hollowed end of the propellant housing so as to form a well, the other end of said cylindrical plunger abutting the integral web, sealing means positioned circumferentially on the reduced section of the cylindrical plunger, an explosive charge positioned within the well, electric leads passing through the bore of the propellant housing and embedded in the explosive charge in such a manner that the charge is detonated when an electric current is caused to flow through the leads.
- a device in accordance with claim 1 wherein the sealing means utilized are constructed of rubber.
- a device in accordance with claim 2 whereby on the detonation of the explosive charge within the well, the cylindrical plunger is motivated axially thereby extruding the sealing means circumferentially on the reduced and unreduced section of the cylindrical plunger, thereby sealing the explosive gases.
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Portable Nailing Machines And Staplers (AREA)
Description
Nov. 14, 1967 Fig.3
Filed April 29, 1966 A l /5 g l /'/9/3 24 32 29 n Fig.5
I T j 'III, 24 Ii 30 25 29 /7 2/ f M: Z Z /5 /9 23 32 INVENTOR. I Karl R. Brown BY id/ W a% W4w A T TOR/VEYS United States Patent ()fiice 3,352,189 Patented Nov. 14, 1967 Army Filed Apr. 29, 1966, Ser. No. 547,077 4 Claims. (Cl. 851) The invention described herein may be manufactured and used by and for the Government of the United States of America for governmental purposes without the payment to me of any royalty thereon.
This invention relates to releasable components and more particularly to a bolt or like elements which may be instantly released from an associated member with which it is associated by means of an explosive charge.
Explosive charges utilized in cooperating structures are presently known for efiecting the quick release of one piece of structure from another. Such devices are utilized in the aircraft industry for effecting the quick release of closures, canopies, auxiliary gas tanks, bombs, etc., positioned at remote locations. Such quick release means may be utilized in any type of installation where instantaneous release of assembled parts are required.
In certain instances, the noise created by the utilization of explosive charges in cooperating structures for effecting the quick release of one piece of structure from another cannot be tolerated. It has been discovered that quieted operations are achieved by sealing the propellant gases from the surrounding atmosphere on activation of the explosive device. In addition, a high initial propelling force is exerted on the propelled material on the sealing of the explosive generated propellant gases.
It is an object of the invention to provide and disclose a member containing an explosive charge therein, and adapted to cooperate with an associated member, whereby on the detonation of the explosive charge, said associated member is instantaneously propelled therefrom.
It is a further object of the invention to provide and disclose a member containing an explosive charge therein, and adapted to cooperate with an associated member, whereby on the detonation of the explosive charge, the generated propellant gases are sealed from the atmosphere, thereby resulting in a quieted explosion.
It is a further object of the invention to provide and disclose a member containing an explosive charge therein, and adapted to cooperate with an associated member whereby on the detonation of the explosive charge, the generated propellant gases are sealed from the atmosphere, thereby resulting in the exertion of a high initial force on the associated member being propelled.
It is a further object of the invention to provide and disclose a member containing an explosive charge therein, and adapted to cooperate with an associated member, whereby on the detonation of the explosive charge, there is an absence of fragmentation.
It is a further object of the invention to provide and disclose a member containing an explosive charge therein, and adapted to cooperate with an associated member, wherein the member and associated member are simple and compact in design and construction and easily manufactured.
Other objects and a fuller understanding of the invention may be had by referring to the following description and claims, taken in conjunction with the accompanying drawing in which:
FIGURE 1 shows a longitudinal sectional view of the device in an undetonated condition.
FIGURE 2 shows a cross-sectional view taken through line 2-2 of FIGURE 1.
FIGURE 3 shows a longitudinal sectional view of the device in a detonated condition.
FIGURE 4 shows a cross-sectional view taken through line 44 of FIGURE 3.
FIGURE 5 shows an exploded longitudinal sectional view of the device.
Referring now to FIGURE 5, the device comprises cylindrical housing 10, which contains a longitudinal coaxial bore 11 extending partially therethrough. Bore 11 comprises threaded section 13 at one end, shoulder E16, and reduced diameter 18, which terminates on surface 12 at the other end. Extending axially from the closed end of cylindrical housing 10 is cylindrical bolt 25, being separated therefrom by integral web 32. Cylindrical bolt 25 comprises a threaded end 29 and a smooth end 30 having a diameter substantially equal to reduce diameter 18 of bore 11. Cylindrical housing 10 and bolt 25 projecting therefrom are machined from one piece. The threaded end of bore 11 is suitably contoured to receive externally threaded cylindrical propellant housing 15. In the assem bly of the device, a threaded sealing compound may be utilized in order to assure a complete seal. Longitudinal coaxial bore 17 extends through propellant housing 15 to cylindrical detonation well 19, which contains explosive charge 24 as shown in FIGURE 1. Electric leads 14 pass through bore 17 and are embedded in explosive charge 20 in such a manner that the charge will be detonated when an electric current is caused to flow through the leads. Detonation well 19 is formed by the hollowed abutting ends of cylindrical propellant housing 15 and plunger 21, which comprises a cylindrical shaped object having a diameter equal to cylindrical propellant housing 15 at its hollowed abutting end and reduced diameter 22 at the other end. Seal 23 is positioned circumferentially on reduced diameter 22 so as to encompass a substantial portion thereof, and in an amount so that the combined diameter of the reduced section of the plunger and the seal is equal to the unreduced section of the plunger. The seal may be of any suitable material which possesses the characteristics of pliability and extrudability, e.g., rubber. In addition, a Tygon seal was tested and found to be effective.
On the detonation of explosive charge 20 in detonation well 19, the explosive gases generated thereby motivate plunger 21 laterally so that surface 24 is connected with surface 12 of cylindrical housing 10. As a result, seal 23 is compressed between shoulder 26 of plunger 21 and shoulder 16 of cylindrical housing 10. As a result of the compression of the seal between two shoulders, seal 23 is extruded circumferentially over the reduced and nonreduced sections of plunger 21, as shown in FIGURE 3. Concurrently with the compression and extrusion of seal 23, the force of contact of surface 24 of plunger 21 against surface 12 of cylindrical housing 10 shears the integral web 32, thereby expelling bolt 25. The noise is reduced to that created by the plunger shearing the integral web 32 between the cylindrical housing and bolt. The compression and extrusion of the seal by the lateral movement of plunger 21 seals the device, thereby preventing the escape of the propellant gases.
Although we have described our invention with a certain degree of particularity, it is understood that the present disclosure has been made by Way of example and that numerous changes in the detail of construction and arrangement of parts may be resorted to without departing from the spirit and scope of the invention as hereinafter claimed.
I claim:
1. A gas sealed propelling arrangement comprising a cylindrical housing and bolt separated by an integral web, said cylindrical housing having a longitudinal coaxial partially threaded bore extending partially therethrough, an externally threaded cylindrical propellant housing encompassed within the cylindrical housing and suitably contoured so as to be compatible with the internally threaded section of the cylindrical housing, said propellant housing having a longitudinal coaxial bore extending therethrough which terminates into a hollowed end, a cylindrical plunger having a reduced diameter section encompassed within the unthreaded section of the cylindrical housing, said cylindrical plunger having a hollowed end abutting the hollowed end of the propellant housing so as to form a well, the other end of said cylindrical plunger abutting the integral web, sealing means positioned circumferentially on the reduced section of the cylindrical plunger, an explosive charge positioned within the well, electric leads passing through the bore of the propellant housing and embedded in the explosive charge in such a manner that the charge is detonated when an electric current is caused to flow through the leads.
2. A device in accordance with claim 1 wherein the sealing means utilized are constructed of rubber.
3. A device in accordance with claim 2 whereby on the detonation of the explosive charge within the well, the cylindrical plunger is motivated axially thereby extruding the sealing means circumferentially on the reduced and unreduced section of the cylindrical plunger, thereby sealing the explosive gases.
4. A device in accordance with claim 3, whereby on the detonation of the explosive charge within the well, the cylindrical plunger is motivated axially, thereby shearing the integral web and separating the bolt from the cylindrical housing.
No references cited.
SAMUEL W. ENGLE, Primary Examiner.
Claims (1)
1. A GAS SEALED PROPELLING ARRANGEMENT COMPRISING A CYLINDRICAL HOUSING AND BOLT SEPARATED BY AN INTEGRAL WEB, SAID CYLINDRICAL HOUSING HAVING A LONGITUDINAL COAXIAL PARTIALLY THREADED BORE EXTENDING PARTIALLY THERETHROUGH, AN EXTERNALLY THREADED CYLINDRICAL PROPELLANT HOUSING ENCOMPASSED WITHIN THE CYLINDRICAL HOUSING AND SUITABLY CONTOURED SO AS TO BE COMPATIBLE WITH THE INTERNALLY THREADED SECTION OF THE CYLINDRICAL HOUSING, SAID PROPELLANT HOUSING HAVING A LONGITUDINAL COACIAL BORE EXTENDING THERETHROUGH WHICH TERMINATES INTO A HOLLOWED END, A CYLINDRICAL PLUNGER HAVING A REDUCED DIAMETER SECTION ENCOMPASSED WITHIN THE UNTHREADED SECTION OF THE CYLINDRICAL HOUSING, SAID CYLINDRICAL PLUNGER HAVING A HOLLOWED END ABUTTING THE HOLLOWED END OF THE PROPELLANT HOUSING SO AS TO FORM A WELL, THE OTHER END OF SAID CYLINDRICAL PLUNGER
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US547077A US3352189A (en) | 1966-04-29 | 1966-04-29 | Explosive bolt |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US547077A US3352189A (en) | 1966-04-29 | 1966-04-29 | Explosive bolt |
Publications (1)
Publication Number | Publication Date |
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US3352189A true US3352189A (en) | 1967-11-14 |
Family
ID=24183261
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US547077A Expired - Lifetime US3352189A (en) | 1966-04-29 | 1966-04-29 | Explosive bolt |
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US (1) | US3352189A (en) |
Cited By (19)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3408890A (en) * | 1967-01-27 | 1968-11-05 | Hi Shear Corp | Separable fastener assembly |
US3517583A (en) * | 1968-07-25 | 1970-06-30 | Mc Donnell Douglas Corp | Fastening device |
US3763740A (en) * | 1971-07-27 | 1973-10-09 | Nasa | Collapsible pistons |
US3888158A (en) * | 1973-08-30 | 1975-06-10 | Mine Safety Appliances Co | Explosively actuated separable connecting device |
US4283987A (en) * | 1979-06-25 | 1981-08-18 | Cartridge Actuated Devices, Inc. | Explosive release clamp system |
US4619199A (en) * | 1984-07-31 | 1986-10-28 | The United States Of America As Represented By The Secretary Of The Air Force | Safing and arming mechanism |
US4624600A (en) * | 1985-03-22 | 1986-11-25 | Wagner Richard H | Anti-terrorist vehicle impaler |
US4671715A (en) * | 1986-04-03 | 1987-06-09 | Hi-Shear Corporation | Lesser shock separation fastener |
US4986708A (en) * | 1989-06-12 | 1991-01-22 | The United States Of America As Represneted By The Secretary Of The Navy | Self-sealing separation fastener for small confines |
EP0433940A1 (en) * | 1989-12-19 | 1991-06-26 | Trasco Export Gmbh | Emergency exit device for an armoured vehicle |
US20050057027A1 (en) * | 2003-09-15 | 2005-03-17 | Trw Vehicle Saftey Systems Inc. | Actuatable fastener |
US20060027083A1 (en) * | 2004-07-21 | 2006-02-09 | Agency For Defense Development | Explosive bolt |
DE102005030092A1 (en) * | 2005-06-27 | 2006-12-28 | Diehl Bgt Defence Gmbh & Co. Kg | Parachute cartridge/monitoring missile separation bolt, has piston which is fit in axial direction, where piston is accelerated in axial direction during ignition of propelling set |
US20070267549A1 (en) * | 2006-05-17 | 2007-11-22 | Won-Kyu Bang | Mounting structure for boss of display module |
US20090167006A1 (en) * | 2005-12-08 | 2009-07-02 | Schonhuber Georg | Pyrotechnical Actuator Unit, Method of Manufacturing the Same, and Gas Bag Module With Such Actuator Unit |
CN102759373A (en) * | 2012-07-10 | 2012-10-31 | 中国科学院西安光学精密机械研究所 | Two-dimensional tracking rotary table locking and automatic unlocking mechanism |
CN107191459A (en) * | 2017-06-09 | 2017-09-22 | 北京空间飞行器总体设计部 | A kind of strong contained explosion bolt device |
RU2700137C1 (en) * | 2018-09-25 | 2019-09-12 | Акционерное общество "Военно-промышленная корпорация "Научно-производственное объединение машиностроения" | Detachable connection with countersunk head |
US11852181B1 (en) * | 2021-08-30 | 2023-12-26 | United States Of America, As Represented By The Secretary Of The Navy | Separation bolt by eutectic decohesion |
-
1966
- 1966-04-29 US US547077A patent/US3352189A/en not_active Expired - Lifetime
Non-Patent Citations (1)
Title |
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None * |
Cited By (26)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3408890A (en) * | 1967-01-27 | 1968-11-05 | Hi Shear Corp | Separable fastener assembly |
US3517583A (en) * | 1968-07-25 | 1970-06-30 | Mc Donnell Douglas Corp | Fastening device |
US3763740A (en) * | 1971-07-27 | 1973-10-09 | Nasa | Collapsible pistons |
US3888158A (en) * | 1973-08-30 | 1975-06-10 | Mine Safety Appliances Co | Explosively actuated separable connecting device |
US4283987A (en) * | 1979-06-25 | 1981-08-18 | Cartridge Actuated Devices, Inc. | Explosive release clamp system |
US4619199A (en) * | 1984-07-31 | 1986-10-28 | The United States Of America As Represented By The Secretary Of The Air Force | Safing and arming mechanism |
US4624600A (en) * | 1985-03-22 | 1986-11-25 | Wagner Richard H | Anti-terrorist vehicle impaler |
US4671715A (en) * | 1986-04-03 | 1987-06-09 | Hi-Shear Corporation | Lesser shock separation fastener |
US4986708A (en) * | 1989-06-12 | 1991-01-22 | The United States Of America As Represneted By The Secretary Of The Navy | Self-sealing separation fastener for small confines |
EP0433940A1 (en) * | 1989-12-19 | 1991-06-26 | Trasco Export Gmbh | Emergency exit device for an armoured vehicle |
US20050057027A1 (en) * | 2003-09-15 | 2005-03-17 | Trw Vehicle Saftey Systems Inc. | Actuatable fastener |
US7461859B2 (en) | 2003-09-15 | 2008-12-09 | Trw Vehicle Safety Systems Inc | Actuatable fastener |
US7240917B2 (en) | 2003-09-15 | 2007-07-10 | Trw Vehicle Safety Systems Inc. | Actuatable fastener |
US20070228708A1 (en) * | 2003-09-15 | 2007-10-04 | Trw Vehicle Safety Systems Inc. | Actuatable fastener |
US20060027083A1 (en) * | 2004-07-21 | 2006-02-09 | Agency For Defense Development | Explosive bolt |
DE102005030092A1 (en) * | 2005-06-27 | 2006-12-28 | Diehl Bgt Defence Gmbh & Co. Kg | Parachute cartridge/monitoring missile separation bolt, has piston which is fit in axial direction, where piston is accelerated in axial direction during ignition of propelling set |
US20090167006A1 (en) * | 2005-12-08 | 2009-07-02 | Schonhuber Georg | Pyrotechnical Actuator Unit, Method of Manufacturing the Same, and Gas Bag Module With Such Actuator Unit |
US8083259B2 (en) * | 2005-12-08 | 2011-12-27 | Trw Airbag Systems Gmbh | Pyrotechnical actuator unit, method of manufacturing the same, and gas bag module with such actuator unit |
US20070267549A1 (en) * | 2006-05-17 | 2007-11-22 | Won-Kyu Bang | Mounting structure for boss of display module |
US8267629B2 (en) * | 2006-05-17 | 2012-09-18 | Samsung Sdi Co., Ltd. | Mounting structure for boss of display module |
CN102759373A (en) * | 2012-07-10 | 2012-10-31 | 中国科学院西安光学精密机械研究所 | Two-dimensional tracking rotary table locking and automatic unlocking mechanism |
CN102759373B (en) * | 2012-07-10 | 2015-03-11 | 中国科学院西安光学精密机械研究所 | Two-dimensional tracking rotary table locking and automatic unlocking mechanism |
CN107191459A (en) * | 2017-06-09 | 2017-09-22 | 北京空间飞行器总体设计部 | A kind of strong contained explosion bolt device |
CN107191459B (en) * | 2017-06-09 | 2018-11-23 | 北京空间飞行器总体设计部 | A kind of strong contained explosion bolt device |
RU2700137C1 (en) * | 2018-09-25 | 2019-09-12 | Акционерное общество "Военно-промышленная корпорация "Научно-производственное объединение машиностроения" | Detachable connection with countersunk head |
US11852181B1 (en) * | 2021-08-30 | 2023-12-26 | United States Of America, As Represented By The Secretary Of The Navy | Separation bolt by eutectic decohesion |
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