US2835894A - Explosion-operated tool - Google Patents

Explosion-operated tool Download PDF

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Publication number
US2835894A
US2835894A US321626A US32162652A US2835894A US 2835894 A US2835894 A US 2835894A US 321626 A US321626 A US 321626A US 32162652 A US32162652 A US 32162652A US 2835894 A US2835894 A US 2835894A
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US
United States
Prior art keywords
barrel
casing
sleeve
guard
pin
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
Application number
US321626A
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English (en)
Inventor
Behrend Herbert
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Individual
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Individual
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Publication date
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Publication of US2835894A publication Critical patent/US2835894A/en
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Expired - Lifetime legal-status Critical Current

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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
    • B25C—HAND-HELD NAILING OR STAPLING TOOLS; MANUALLY OPERATED PORTABLE STAPLING TOOLS
    • B25C1/00—Hand-held nailing tools; Nail feeding devices
    • B25C1/08—Hand-held nailing tools; Nail feeding devices operated by combustion pressure
    • B25C1/10—Hand-held nailing tools; Nail feeding devices operated by combustion pressure generated by detonation of a cartridge
    • B25C1/12—Hand-held nailing tools; Nail feeding devices operated by combustion pressure generated by detonation of a cartridge acting directly on the bolt
    • B25C1/123—Hand-held nailing tools; Nail feeding devices operated by combustion pressure generated by detonation of a cartridge acting directly on the bolt trigger operated

Definitions

  • the invention relates to an explosion-operated tool or device for driving steel pins or bolts into construction parts, such as masonry, concrete, structural iron and steel, or other materials by means of gunpowder.
  • construction parts such as masonry, concrete, structural iron and steel, or other materials by means of gunpowder.
  • devices of this kind which, however, have many disadvantages.
  • a principal diiiiculty is that all such devices may also be operated with their splinter-guard sleeve removed, which leads frequently to undesired accidents.
  • Another disadvantage is that the barrel of the tool must be unscrewed or disassembled from the casing therefor for each operation or discharge, or else must be secured therein by a slide catch, which involves considerable loss of time.
  • the device according to the invention is held with its end or mouth pressed rmly against the wall to be worked upon, thereby displacing the casing relative to the barrel and an associated firing block and tensioning the firingpin spring so that the device is immediately ready for operation or discharge.
  • this can happen only when the splinter-guard sleeve displaces an expansion or ball sleeve which would otherwise stop o1' impede the motion of the casing if the operator should omit the guard sleeve due to oversight or for purpose of convenience. The discharge could then not occur.
  • Another feature of the invention is to provide means whereby the barrel, after insertion of the fastener and cartridge thereinto, may be pushed or inserted into the device without being threaded ithereinto.
  • the locking or coupling of the block to the barrel for the discharge of a cartridge by means of a firing pin is likewise effected by an expansion or coupling sleeve which is fully actuated when the device is pressed against the wall to be worked upon.
  • Still another important advantage ofthe device accordingto the invention is that the barrel need merely be inserted into the toolfthereby affording a far more rapid operation than heretofore experienced. This is especially soif a repeater barrel ⁇ is employed.
  • Fig. 1 is a longitudinal section through the loaded device made according to the invention, and shown in normal position together with the splinter-guard sleeve;
  • Fig. 2 shows the device according to Fig. 1, immediately before discharge
  • Fig. 3 shows the device according to the invention, without splinter-guard sleeve, with the barrel locked accordinsly;
  • Fig. 4 shows a modification of the barrel when used as a repeater
  • Fig. 5 is a side elevational View of an expansion sleeve
  • Fig. 6 shows a ball sleeve
  • Fig. l represents a loaded tool according to the invention and prior to its operation.
  • the tool comprises a barrel 3 provided with a central bore or passageway, the barrel being shown to be loaded with a fastener 1 and a cartridge 2.
  • the barrel is located within casing S and is maintained in position by the coaction of recess 20 in casing 5 with tapered or conical flexible jaws or lugs 22 of a rst eX- pansion sleeve f-l, said expansion sleeve being an extension of block'23 located against the inner end of the barrel.
  • the jaws of the expansion sleeve 4 are provided with internal grooves 29 which correspond with external grooves 3l) on the barrel 3.
  • a second expansion sleeve 6 is positioned between the barrel and Ithe casing and abuts with its rear end against the adjacent ends of lugs 22 of expansion sleeve 4, while its lugs 22 rest in recess 21 of the casing.
  • the barrel 3 is provided with a short intermediate portion a of reduced diameter.
  • Splinter guard sleeve 7 abuts at one end against forward extremity of lugs 22 of expansion sleeve 6 and fits snugly in the space between barrel 3 and the forward end of casing 5.
  • the other end of splinter guard 7 is enlarged, as shown, in order to shield the operator from particles of gunpowder, mortar, etc.
  • a tiring-pin releasing bolt or latch 8 isV positioned and held in position by a leafspring 9.
  • the bolt has a central cylindrical opening which is normally out of alignment with the central cylindrical opening in block 23.
  • a cup-shaped member 31 positioned within casing 5 abuts bolt or latch 8 and has a central opening aligned with that of block 23.
  • Spring sleeve or housing 12 reaches at one end into member 31 and carries firing pin 10 which projects through the opening of member 31 and is provided with an impact tip 27 extending into the cen tral opening of bolt or latch 8.
  • Enlarged head 23 is attached to the firing pin and limits forward movement of the firing pin relative to spring housing 12.
  • Firing-pin spring 11 is accommodated within spring housing 12 under slight compression, bearing at one end against enlarged head 28 and at the other end against perforated plate 19.
  • Sleeve 14 accommodated within casing 5, engages spring housing 12 and contains perforated plate 19 and a spring 13 which is provided to compensate for any unevenness in the wall.
  • the compressibility of spring permits some additional movement of splinter guard '7, casing 5 and its associated par-ts until the front edge of guard 7 is coplanar with the front face of barrel 3, as may be seen in Fig. 2.
  • Spring 13 is held in place by pressure head 16 secured to the outside of casing 5.
  • Spring 15 surrounds rings housing 12 and bears against member 31 and sleeve 14.
  • the firing-pin releasing means additionally comprise a leafspring 18 which lies inside casing 5 and extends from latch 8 to the area occupied by spring 15. Rivet 24 secures leafspring 18 to the casing.
  • Latch actuating button 17 is fixed to leafspring 1S and extends movably through a lateral bore in casing 5.
  • barrel 3 In operation, the front end of barrel 3 is placed against a construction part, such as wall W, which is to bc pierced by bolt or pin 1, and pressure is then applied to head i6 to move casing 5 and sleeve i4 relative to barrel 3 and toward wall W. Since barrel 3, expansion sleeve d and associated block 23, latch ti, cup-shaped member 3l, and firing pin l0 remain stationary as casing 5 moves forward, spring is compressed between the front end of sleeve 14 and the rear end of member 3i.
  • spring 13 tends to maintain the rear flanged end of spring housing il?, in engagement with the inner surface of the front end of sleeve ld. rl"hus, housing l2. moves with casing S and into the central open portion of cup-shaped member 3E, whereby firing pin. spring 11 is compressed between plate l@ and head Z3 of ring pin 1t).
  • splinter-guard sleeve 7 abuts against wall W so as to impede any further forward movement of sleeve 6 just as the flexible lugs 22 of the latter are located opposite reduced portion or groove a of barrel 31, so that lugs 22 are deflected radially of and toward barrel 3 by virtue of the camming action of the slanted wall of recess 2i as casing 5 moves further toward wall W.
  • casing 5 finally abuts against splinter-guard sleeve 7 at b, the front end of spring housing 12 contacts the inner surface of the front end of member 31 at c (see Fig. 2) while button il? is now located opposite latch 3.
  • latch 8 Upon movement of button 8 inwardly of casing 5, latch 8 s moved across casing 5 against the force of leaf spring 9 until the central opening of the latch is aligned with the bore in barrel 3, the opening in block 23, and the opening in the front end of member 3ft through which firing pin it) projects. As soon as this alignment is brought about, spring ill impels firing pin iti forwardly into Contact with cartridge 2 to exploded the latter and fire pin or bolt l. into wall W. lnFig. 2, the firing pin is shown in its forward or advanced position immediately prior to firing, fastener l still being present in the bore of barrel 3.
  • the rotation may alternatively be accomplished automatically.
  • the repeater device is prepared for the next discharge by rotating the barrel, while in the single-shot device the barrel is removed and reloaded.
  • Fig. 3 illustrates the use of splinter-guard sleeve 7 as a safety means and shows how failure to employ said splinter-guard sleeve prevents operation of the device.
  • Barrel 3 is placed against the wall and, under pressure applied to head 16, casing 5 moves along the barrel until the front end of expansion sleeve 6 contacts the barrel at a', which would not have been possible had the splinterguard been present. It is, therefore, evident that casing 5 is never disconnected or disengaged from expansion sleeve 6, the lugs 22 of sleeve 6 remaining in recess 21.
  • a ball sleeve as shown in Fig. 6 may be employed.
  • Such a ball sleeve comprises a body member 25 in radial bores of which balls 26 are resiliently mounted, which balls are radially movable, but are secured against falling out.
  • block 23 and sleeve 4 may be separate elements connected or joined by suitable fastening means.
  • a tool for driving a steel pin, bolt or like object into a construction part comprising an elongated barrel having a front end and a rear end, said front end of said barrel abutting against said construction part during driving of said object thereagainst, said barrel being provided with a longitudinal bore extending therethrough to form a passageway for a cartridge and said object to be driven, a casing comprising an elongated front portion and a handle portion and surrounding said barrel, said casing being movable longitudinally relative to said barrel toward and away from the front end of the latter, means for supporting a firing pin within said casing and positioned rearwardly of said barrel, means for cooking said firing pin as said casing is moved forward relative to said barrel upon application of pressure against said handle portion, a guard member having a sleeve portion for surrounding said front end of said barrel and adapted to be received in the front portion of said casing, and means in said casing inter
  • a tool for driving a steel pin, bolt, and like object into a construction part comprising an elongated barrel having a front end and a rear end, said front end of said barrel abutting against said construction part during driving of said object thereagainst, said barrel being provided with a bore extending longitudinally therethrough to form a passageway for a cartridge and for said object to be driven, a hollow, elongated casing surrounding said barrel and movable longitudinally relative to said barrel toward and away from said front end of the latter, respectively, a firing pin disposed within said ⁇ casing rearwardly of said barrel and in alignment with said bore and movable longitudinally thereof, resilient means in said casing and operatively connected to said firing pin for exerting a forward biasing force on said firing pin, releasing means in said casing and manually actuatable from without the latter for releasably restraining said liring pin against longitudinal movement toward said barrel bore under the force of said resilient means, a splinterguard sleeve
  • said sleeve means being an expansion sleeve and having at least one part movable radially of said casing and said barrel, said casing being provided with an internal recess for accommodating said part prior to movement of said casing toward said front end of said barrel.
  • a tool for driving a steel pin, bolt, and like object into a construction part comprising an elongated barrel having a front end and a rear end and an intermediate portion of reduced diameter, said front end of said barrel abutting against said construction part during driving of said object thereagainst, said barrel being provided with at least one bore extending longitudinally therethrough to form a passageway for a cartridge and for said object to be driven, a hollow, elongated casing surrounding said barrel and movable longitudinally relative to said barrel toward and away from said front end of the latter, respectively, a ring pin disposed within said casing rearwardly of said barrel and in alignment with said bore of said barrel and movable longitudinally thereof, resilient means in said casing and operatively connected to said ring pin for exerting a forward biasing force on said firing pin, a firing pin latch in said casing for releasably restraining said firing pin against movement toward said barrel under the action of said resilient means, means on said casing for operating said latch and releasing said firing
  • a tool according to claim 3 further including additional resilient means in said casing and tensioned by movement of said casing toward said front end of said barrel, whereby said casing, said barrel, said latch, said expansion sleeve, and said splinter-guard sleeve are returned to their normal positions with respect to each other upon withdrawal of said barrel and said splinter-guard sleeve from said construction part.
  • a tool for driving a steel pin, bolt or like object into a construction part comprising an elongated barrel having a front end and a rear end, said front end of said barrel abutting against said construction part during driving of said object thereagainst, said barrel being provided with a longitudinal bore extending therethrough to form a passageway for a cartridge and said object lto be driven, a casing comprising an elongated front portion and a handle portion and surrounding said barrel, said casing being movable longitudinally relative to said barrel toward and away from the front end of the latter, means for supporting a ring pin within said casing and positioned rearwardly of said barrel, means for cooking said tiring pin as said casing is moved forward relative to said barrel upon application of pressure against said handle portion, a guard member having a sleeve portion for surrounding said front end of said barrel and adapted to be received in the front portion of said casing, and means in said casing interposed between the latter, said barrel and said sleeve portion and inoperable in
  • An explosion operated tool comprising an elongated barrel having a front end and a rear end, said front end of said barrel abutting against a construction part during driving an object thereagainst, said barrel being provided with a longitudinal bore extending therethrough to form a passageway for a cartridge and an object to be driven, a casing comprising an elongated front portion and a handle portion, said casing surrounding said barrel, said casing being movable longitudinally relative to said barrel toward and away from said front end of said barrel, said casing having a recess therein, a iirst expansiole sleeve about said barrel, said rst expansible sleeve having tapered tlexible jaws coacting with said recess to maintain said barrel in position in said casing, means for supporting a tiring pin within said casing and positioned rearwardly of said barrel, means for cooking said tiring pin as said casing is moved for- Ward relative to said barrel upon application of pressure against said handle portion,
  • An explosion operate tool for driving an object into a construction part comprising an elongated barrel having a front end and a rear end, said front end of said barrel abutting against a construction part during driving of an object thereagainst, said barrel being provided with a longitudinal bore extending therethrough to form a passageway for a cartridge and an object to be driven, a casing comprising an elongated front portion and a handle portion, said casing surrounding said barrel, said casing being movable longitudinally relative to said barrel toward and away from said front end of said barrel, said casing having a first recess therein, a rst expansible sleeve about said barrel, said tirst expansible sleeve having tapered flexible jaws coacting with said first recess to maintain said barrel in position in said casing, means for supporting a tiring pin within said casing and positioned rearwardly of said barrel, means for cooking said tiring pin as said casing is moved forward relative to said barrel upon application of pressure against said handle portion

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • Portable Nailing Machines And Staplers (AREA)
US321626A 1951-11-21 1952-11-20 Explosion-operated tool Expired - Lifetime US2835894A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE313213X 1951-11-21

Publications (1)

Publication Number Publication Date
US2835894A true US2835894A (en) 1958-05-27

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Application Number Title Priority Date Filing Date
US321626A Expired - Lifetime US2835894A (en) 1951-11-21 1952-11-20 Explosion-operated tool

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US (1) US2835894A (en(2012))
BE (1) BE515669A (en(2012))
CH (1) CH313213A (en(2012))
FR (1) FR1066682A (en(2012))
GB (1) GB717468A (en(2012))

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2945236A (en) * 1953-05-14 1960-07-19 Olin Mathieson Explosively actuated tools
US2977598A (en) * 1955-11-17 1961-04-04 Omark Industries Inc Stud driving tool
US3046557A (en) * 1954-05-17 1962-07-31 Omark Industries Inc Explosively actuated tool
US3072911A (en) * 1957-12-04 1963-01-15 Sarmi S A Societa D Applic De Fixing guns adapted to drive nails and the like, such as for example studs and plugsin hard compact materials
FR2149056A5 (en(2012)) * 1972-05-15 1973-03-23 Egie

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1071006B (de) * 1954-02-23 1959-12-10 Mettmann Walter Schulz (RhId.) Bolzensetzgerät
BE551741A (en(2012)) * 1955-12-06
DE1182156B (de) * 1957-12-04 1964-11-19 Sarmi S A Societe D Applic De Vorrichtung zur Sicherung von Bolzensetzpistolen gegen Benutzung ohne Splitterschutzschild

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2213435A (en) * 1937-11-29 1940-09-03 Jr Robert Temple Tool
US2479431A (en) * 1948-06-22 1949-08-16 Temple Velocity Equipment Inc Safety mechanism for explosively actuated tools
US2549993A (en) * 1946-07-19 1951-04-24 Portable Ind Inc Breechblock for explosively actuated fastening tools
US2576473A (en) * 1950-02-01 1951-11-27 Powder Power Tool Corp Method of securing a fastening element in concrete

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2213435A (en) * 1937-11-29 1940-09-03 Jr Robert Temple Tool
US2549993A (en) * 1946-07-19 1951-04-24 Portable Ind Inc Breechblock for explosively actuated fastening tools
US2479431A (en) * 1948-06-22 1949-08-16 Temple Velocity Equipment Inc Safety mechanism for explosively actuated tools
US2576473A (en) * 1950-02-01 1951-11-27 Powder Power Tool Corp Method of securing a fastening element in concrete

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2945236A (en) * 1953-05-14 1960-07-19 Olin Mathieson Explosively actuated tools
US3046557A (en) * 1954-05-17 1962-07-31 Omark Industries Inc Explosively actuated tool
US2977598A (en) * 1955-11-17 1961-04-04 Omark Industries Inc Stud driving tool
US3072911A (en) * 1957-12-04 1963-01-15 Sarmi S A Societa D Applic De Fixing guns adapted to drive nails and the like, such as for example studs and plugsin hard compact materials
FR2149056A5 (en(2012)) * 1972-05-15 1973-03-23 Egie

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Publication number Publication date
BE515669A (en(2012))
CH313213A (de) 1956-03-31
GB717468A (en) 1954-10-27
FR1066682A (fr) 1954-06-09

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