Hand-held shot tube detonator
원문보기
IPC분류정보
국가/구분 |
United States(US) Patent
등록
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국제특허분류(IPC7판) |
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출원번호 |
US-0196922
(1980-10-14)
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발명자
/ 주소 |
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출원인 / 주소 |
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대리인 / 주소 |
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인용정보 |
피인용 횟수 :
9 인용 특허 :
1 |
초록
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A hand-held shot tube detonator including a primer and shot tube holder removably mounted on a firing pin body having a flash guard movable between extended and retracted positions. The flash guard is retracted to permit mounting of the holder on the body and is then extended to surround the holder
A hand-held shot tube detonator including a primer and shot tube holder removably mounted on a firing pin body having a flash guard movable between extended and retracted positions. The flash guard is retracted to permit mounting of the holder on the body and is then extended to surround the holder to channel the flash and explosive gases away from the operator when the detonator is fired.
대표청구항
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1. A detonator of the type including a firing pin body with a firing pin, a spring biasing the firing pin toward a firing position, and a trigger operable to release the firing pin for movement to the firing position, wherein the improvement comprises a holder separate from the body having a cap bor
1. A detonator of the type including a firing pin body with a firing pin, a spring biasing the firing pin toward a firing position, and a trigger operable to release the firing pin for movement to the firing position, wherein the improvement comprises a holder separate from the body having a cap bore for receiving an explosive primer, at least one vent passage in the holder intersecting the cap bore, a hollow neck extending away from the cap bore adapted to surround the upstream end of a shot tube or the like, the interior of the neck communicating with the primer bore; and means for removably mounting the holder on the firing pin body with the bore at the firing position, said means including abutting surfaces on said body and holder preventing movement of the holder away from the firing position when the primer is fired whereby the shock wave and blast expand from the primer bore into and along the interior of the neck to ignite the shot tube and are vented through the passage. 2. A detonator as in claim 1 wherein the firing pin is movable along a longitudinal axis and the primer bore and neck are aligned on said axis when the holder is mounted on the firing pin body. 3. A detonator as in claim 2 wherein the neck includes an interior step facing the free end thereof for limiting insertion of the shot tube. 4. A detonator as in claim 2 wherein the firing pin body includes a domed primer seat and said firing pin extends through the top of the dome to fire the primer. 5. A detonator as in claim 2 wherein the firing pin body includes an elongate portion surrounding the firing pin and including an elongate hollow flash guard mounted on the portion and movable along the portion between a retracted position permitting mounting of the holder on the firing pin body and an extended position where the flash guard surrounds the vent passage. 6. A detonator as in claim 5 wherein said means includes an extension on the body having finger means spaced downstream from the end of the body, and the holder includes a flange movable between the finger means and the body. 7. A detonator as in claim 5 wherein said flash guard includes an inner surface mounted on the body and longitudinally movable and radially rotatable on said body, a pin and slot connection between the guard and body including a pin extending outwardly from said body and a slot in the guard, the pin extending into the slot, said slot having an elongate axial run and a short radial run at the downstream end of the axial run, a pin locking recess on the upstream side of the radial run away from the long run for receiving said pin and holding the flash guard in the retracted position, and means for holding the guard in the extended position. 8. A detonator as in claim 7 wherein the firing pin body includes an axial bore, said firing pin being fitted within said bore, a spring fitted between the upstream end of the firing pin and the upstream end of the bore to bias the firing pin downstream, a slot extending through the body having a long axial run, a short radial run at the upstream end of the axial run and a locking recess on the downstream side of the radial run away from the axial run, said firing pin including a trigger extending outwardly through said slot and having a sliding fit therewith whereby the firing pin is cocked by moving the trigger upstream along the long run and radially along the short run so that the spring holds the trigger in the recess, the axial distance between the upstream end of the flash guard and the locking recess therein being slightly greater than the axial distance between the pin on the body and the downstream edge of the trigger when the trigger is seated in the recess on the firing pin body whereby movement of the flash guard to the retracted position and seating of the pin on the firing pin body in the recess of the flash guard lifts the trigger a slight distance from the seated position so that the spring biases the flash guard against the pin. 9. A detonator as in claim 8 wherein the trigger locking recess has sufficient axial length to prevent radial movement of the pin when the flash guard is in the locked upstream position. 10. A detonator as in claim 8 wherein the downstream side of the firing pin body radial run is angled upstream from the recess to the axial run so that the trigger must be moved both radially and axially upstream in order to fire the detonator. 11. A detonator as in claim 8 wherein in each slot the short run extends radially from the long run in the same circumferential direction around the detonator. 12. A detonator as in claim 8 wherein the trigger includes an enlarged hollow handle outside the body slot. 13. A detonator as in claim 5 including an outwardly extending radial collar on the neck. 14. A detonator as in claim 7 wherein said means includes surfaces on the firing pin body and holder angularly orienting the holder with respect to the body and wherein the axial run of the flash guard slot does not overlie the vent passage when the flash guard is extended. 15. A detonator of the type having a body, a primer bore, a firing pin, a spring biasing the firing pin toward the bore to detonate an explosive primer in the bore, a trigger for releasing the firing pin to detonate the primer and a vent passage communicating with the bore, wherein the improvement comprises a hollow thin-walled neck extending away from the end of the bore remote from the trigger, said neck being adapted to receive the upstream end of the slot tube or the like whereby the shock wave and pyrotechnic blast from the firing of a primer travel through the neck to ignite the tube and are vented through the vent passage. 16. A detonator as in claim 15 wherein said bore and neck are axially aligned with the outside diameter of the neck being not appreciably greater than the inside diameter of the bore so that the neck cannot be bored out to form an extension of the bore for receiving a bullet. 17. A detonator as in claim 16 including means for venting combustion gases downstream along the outside of the neck and wherein the neck includes an outwardly extending deflecting flange. 18. A detonator as in claim 15 including a flash guard surrounding the body and movable between a retracted position remote from the bore and an extended position surrounding the bore and vent passage so that the flash guard prevents immediate radial expansion of the explosive gases. 19. A detonator as in claim 18 including a plurality of cross bores intersecting the bore, the cross bores opening to the extended flash guard. 20. A detonator as in claim 18 wherein the neck extends axially beyond the end of the extended flash guard and includes a flash deflecting collar. 21. A detonator as in claim 15 wherein the neck includes means for limiting insertion of a tube toward the bore. 22. A detonator including a body having a primer receiving cavity, a vent passage communicating with said cavity with the exterior of the body, a firing passage communicating with said primer cavity and including an end away from the primer cavity adapted to receive the upstream end of a shot tube or the like, and firing pin means for igniting a primer in the cavity so that the flash travels through said firing passage to ignite the shot tube and is vented through the vent passage. 23. A detonator as in claim 22 wherein said primer cavity and firing passage are coaxial and the vent passage extends laterally from the primer cavity. 24. A detonator as in claim 22 including a flash deflector spaced from and overlying the outer end of the vent passage. 25. A detonator as in claim 24 wherein the vent passage includes a cross bore extending through the primer cavity and the flash deflector surrounds the body and overlies the cross bore. 26. A detonator as in claim 22 including mounting means removably securing the body and firing pin means together, the primer cavity opening at the junction between the body and the firing pin means, a flash guard and a connection securing the flash guard to the firing pin means permitting movement of the flash guard between a first position overlying the vent passage and a second position remote from the body. 27. A detonator as in claim 26 wherein the firing passage extends axially beyond the end of the flash guard when in the first position and includes a flash deflecting collar on the end thereof away from the primer cavity. 28. A detonator as in claim 26 wherein said mounting means includes means preventing relative axial or rotational movement between the body and the firing pin means. 29. A detonator as in claim 22 wherein the body surrounding the primer cavity includes a weak thin-walled section. 30. A detonator as in claim 23 wherein the body includes a thin-walled neck extending away from the primer cavity, said firing passage extending through said neck, the exterior diameter of the neck being not appreciably greater than the interior diameter of the primer cavity so that the firing passage cannot be bored out to form an extension of the cavity to receive a bullet. 31. A detonator as in claim 22 wherein the firing passage includes means for limiting insertion of a shot tube or the like into the passage. 32. A detonator as in claim 22 wherein the firing passage includes a step facing away from the primer cavity limiting insertion of a shot tube or the like into the passage. 33. A detonator as in claim 26 wherein the firing pin means includes a domed cap seat adjacent the primer cavity when the body and firing pin means are mounted together.
이 특허에 인용된 특허 (1)
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Thorsell Torgny (Skelleftea SW) Svensson Torbjorn (Skelleftea SW), Method and a device for blasting.
이 특허를 인용한 특허 (9)
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Land, David G., Detonator system having linear actuator.
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Land,David G., Detonator system having linear actuator.
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Wilson Douglas G. (11 Edward St. Upper Ferntree Gully ; Vic. ; 3156 AUX), Device for igniting safety fuse.
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Snyder Richard N. (8 Kristen Rd. Garrisonville VA 22463) Rainwater Percy R. (10031 Old Colchester Rd. Lorton VA 22079), Electric/non-electric initiation system.
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Parker, Joshua J., Firing device.
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Peebles Richard J. (Winsted CT) Michna Richard J. (Winsted CT) Monat David E. (Torrington CT) Bartholomew Stephen W. (Granby CT) Adams Craig F. (Granby CT), Initiator for a transmission tube.
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Chamberlain, Keith; Higdon, Thomas; Kummerer, Anthony, Mechanical firing adapter for a M81 device.
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Ballantine, Roger; Hornbrook, Anthony Paul; Moore, Ian; Hamilton, Dave Norman, Shock tube initiator.
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Martin Brian D. (15255 W. Maple Ave. Golden CO 80401), Weatherproof safety fuse igniter.
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