US3409197A - Explosively actuated pusher power tool - Google Patents

Explosively actuated pusher power tool Download PDF

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Publication number
US3409197A
US3409197A US531965A US53196566A US3409197A US 3409197 A US3409197 A US 3409197A US 531965 A US531965 A US 531965A US 53196566 A US53196566 A US 53196566A US 3409197 A US3409197 A US 3409197A
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US
United States
Prior art keywords
barrel
piston rod
guide piece
tool
power tool
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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
US531965A
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English (en)
Inventor
Brack Jacques
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
ETEM TABLISSEMENTS DE TECH MOD
ETEM TABLISSEMENTS DE TECHNIQUES MODERNES
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ETEM TABLISSEMENTS DE TECH MOD
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Publication of US3409197A publication Critical patent/US3409197A/en
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Expired - Lifetime legal-status Critical Current

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Classifications

    • 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
    • B25C1/14—Hand-held nailing tools; Nail feeding devices operated by combustion pressure generated by detonation of a cartridge acting on an intermediate plunger or anvil

Definitions

  • An explosively actuated power tool for driving fastening elements such as bolts, plugs, spikes, and nails, into a hard and compact material.
  • the tool includes a barrel having a loadingchamber for receiving a cartridge and means for closing the chamber and guide means disposed forwardly of the barrel and a guide piece having a bore to receive and guide the fastening element.
  • a piston slides in said barrel and in guide means and in said guide piece and is driven forwardly when the cartridge is fired to drive the fastening element.
  • the rear assembly and the guide piece are displaceable relative to each other and relative to the axis of the tool so as to permit access to the loading chamber and to the guide piece for the introduction of a cartridge and the introduction of a fastening element.
  • the present invention concerns explosively actuated power tools of the'type having a pusher or piston rod for driving of fastening elements such as bolts, plugs, nails and the like into hard and compact materials.
  • fastening elements such as bolts, plugs, nails and the like into hard and compact materials.
  • Various embodiments of this type of tool exist but there are numerous disadvantages, one of which is the complexity and a certain fragility incompatible with the use of the tool. In addition such tools are usually expensive and in some cases difiicult to manipulate.
  • An object of the present invention is to provide a tool from driving fastening elements which obviates or substantially reduces the disadvantages of prior tools of this type.
  • Another object of the invention is to provide a power driven tool for driving fastening elements which is inexpensive to manufacture and ruggedly constructed and may be readily operated. 7
  • FIG. 1 is a part sectional elevation of the assembly of one embodiment of the tool, before the firing of a fastening element.
  • FIG. 2 is a cross section-substantially on the line IIII of FIG. 1.
  • FIG. 3 is a cross section substantially on the line III III of FIG. 1.
  • FIG. 4 is a partial axial section of the forward portion of the tool.
  • FIG. 5 is a similar view to FIG. 4 showing the ejection of a spent cartridge.
  • FIG. 6 is a view similar to that of FIG. 4 showing the loading of a cartridge and the positioning of a bolt.
  • FIG. 7 is a front elevation of a variant of a guide piece.
  • FIG. 8 is a front elevation of another form of the guide p1ece.
  • FIG. 9 is a part section elevation of a second embodiment of the tool in a loaded condition.
  • FIG. 10 is a front elevation of a detail of the tool.
  • FIG. 11 is a plan view of a yoke on which the barrel of the front part of the tool is pivoted.
  • FIG. 12 is a part section of the front part of the tool after firing, but applied against a wall into which a bolt has just been driven.
  • FIG. 13 is a view similar to FIG. 12 on the return to the firing position of the piston rod and the ejection of a spent cartridge.
  • FIG. 14 is a view similar to FIG. 12 showing the loading of the cartridge and a fastening element.
  • FIG. 15 is a view in part section of a variation of the mounting of a guide socket on the front of the barrel.
  • a front part B of the tool is connected to the rear part A in a manner referred to below.
  • the front part B includes a barrel 4 whose bore, at the end adjacent the part A, forms a loading chamber 5 adapted to receive a cartridge C.
  • the barrel 4 is provided with a hard lining 6.
  • An annular enlargement 7 on the liner 6 has a'frustoconical inner surface.
  • the barrel'4 is mounted by trunnions 8 between the arms 9a of a yoke 9 whose body 9b is constructed to serve as the closure member for the loading chamber 5.
  • the yoke 9 is pivotably mounted in a known manner on the rear part A of the tool.
  • the barrel 4 has at its forward end an annular portion 4a provided with an internal thread which is complementary to external threads formed on a socket member 10.
  • a pair of circumferentially spaced prongs 10a extend to the forward extremity of the socket member. Slots 11 are provided between the prongs 10a as best shown in FIG. 2. These prongs provide guide members which are parallel to the axis of the barrel 4.
  • a collar 12 on the rear portion of the socket member 10 provides support for a spindle 13 which extends parallel to the axis of the barrel 4.
  • a stop member 14 is provided at the forward end of the spindle 13.
  • the spindle 13 provides support for a guide piece 15.
  • the guide piece has a body portion 151: and the exterior surfaces thereof are of cylindrical shape adapted to be accommodated between the prongs 10a. Arms 15b project diametrically from the body portion 15a.
  • a sheath 17 lines the bore 16 which extends through the body portion 15a.
  • An annular flange 17a on the sheath 17 abuts a resilient ring 18 which is accommodated in an annular recess 19 formed in the body portion 15a.
  • the ring serves as a shock absorber.
  • One arm 15b has an opening therethrough receiving the spindle 13.
  • the guide piece 15 may be moved longitudinally on the spindle 13 and the body portion 15a moves between the prongs 10a.
  • the arms 15b are then accommodated in the slots 11.
  • a helical spring 20 surrounding the spindle 13 between the stop member 14 and one arm of the guide piece 15 serves as a shock absorber.
  • the guide piece may be rotated about the axis of the spindle 13 when itis moved forwardly beyond the free ends of the prongs 10a.
  • a piston rod 21 has a rear portion arranged for sliding movement in the bore of the barrel 4 and a forward portion adapted to slide in bore of the sheath 17.
  • a piston shaped part 21c on the piston rod is slidable in the passage provided between the inner concave faces of the prongs 10a. 7
  • the connecting rod 21 has a length such that it will always be supported at least at two spaced zones 'on its length. As shown in FIGS. 1 and 6 the piston rod is supported by its parts 21a and 210. Whilst the piston rod is moving fowardly it is supported in each of its three parts 21a, 21b and 210, and at the termination of its forward movement it is supported by its parts 210 and 21b (FIG. 4). The length of the rear part 21a of the piston rod is furthermore such that when pushed to its rearmost position by means of rearward movement of the guide piece 15 it enters the loading chamber 5 to expel a cartridge C (FIG. 5) and thus functions as an ejector.
  • the piston shaped part 21c is attached to the rear part 21a by a frusto conical portion 21d whose shape corresponds to that of the flared mouth of the bore of the liner 6.
  • the length of the part 21a of the piston rod 3 is also, such that theintroduction of a cartridge C into the loading chamber 5, and the closure of the breech by the member 9b causes the piston rod 21 to move forwardly for disengaging the part 21d from the frusto conical bore at the forward end of the liner 6.
  • the guide piece 15 In order to load the tool the guide piece 15 is moved forwardly and is disengaged from the guide passage formed by the two prongs 10a during which operation the spring 20 is compressed. The guide piece can then be rotated around the spindle 13 and brought into the position shown in FIG. 6 in order that a bolt or the like D can be loaded into the bore of the guide piece from the rear and in the direction of the arrow F. A retaining flange d on the bolt fits into a corresponding groove 17b in the annular flange 17a.
  • the guide piece 15 may now be rotated on the spindle 13 and its bore realigned with the axis of the tool as shown in FIG. 1.
  • the front assembly B of the tool may be pivoted around the trunnions 8, in relation to the yoke 19 (which remains aligned in the rear part A of the tool) to uncover the loading chamber 5 into which the cartridge C may be introduced in the direction of the arrow F.
  • the loading chamber is reclosed by returning the assembly B into alignment with the yoke.
  • the guide piece here marked 115, does not have any bulge corresponding to the body 15a.
  • the guiding being then ensured solely by the spindle 13 and by the longitudinal slots 11.
  • the variation shown in FIG. 8 pertains to a guide piece, here marked 215, constructed with a plurality of bores 16 for example four, which allows the loading of a plurality of bolts capable of being brought successively into alignment with the axis of the barrel and to be fired successively.
  • the rear part A in the embodiment shown in FIGS. 9 to 14 is attached to a front assembly B1 which includes a barrel 24.
  • the rearward portion 24a of the barrel communicates with a loading chamber 25 adapted to receive a cartridge C.
  • the barrel 24 is pivotally mounted to turn about a transverse axis 26 between arms 27a and 27b of a yoke 27 whose base 27c serves as a closure member for the loading chamber 25 and also serves to hold the cartridge C tightly in the loading chamber.
  • the arms 27a and 27b of the yoke 27 are of unequal lengths (FIG. 11).
  • the branch 27a supports one end of the pivot pin 26 about which the barrel can be moved.
  • the branch 27b does not support the pivot pin 26 and has such a length that when the assembly B1 is aligned with the rear part A of the tool the barrel is held tightly in the transverse direction between the two arms of the yoke 27 but when the front part B1 is pivoted through 90 the assembly B1 can be withdrawn from the said yoke 27 by simple transverse displacement.
  • the forward end of the barrel 24 carries guide means in the form of a socket member 28 whose forward end is fitted with an internal annular boss 28a. Slots 28b are located at diametrically opposite areas in the socket member 28. 1
  • the rearmost part of the socket member 28 is screwed onto a split nut 38.
  • the two parts 38a and 38b of the split nut are held together by cotter pins 380 as shown in FIG. 10.
  • the nut 38 is adapted to slide on the forward portion of the barrel 24 and to abut an annular shock absorber 39.
  • the shock absorber ring 39 is accommodated between an annular flange 24c and the nut 38.
  • the shock absorber 39 forms an abutment at the forward end of the barrel 24.
  • the socket member 28 acts as a resilient gripper-and constitutes a guiding means for a piston shaped part 29a on the piston rod 29 whose rearward portion-29b is adapted to slide in the bore of the barrel.
  • the forward end 290 of the piston rod 29 is adapted to drive a bolt D.
  • the part 29a is located between the parts 29b and 29c and a frusto-conical portion 29d is adapted to wedge itself temporarily in a corresponding enlargement 24b of the bore 24a to hold the piston rod in position for loading a cartridge and a bolt.
  • the socket member 28 serves as a guide for a slidable block 33 having a bore which corresponds to the diameter of the forward part 29c of the piston rod 29.
  • the block 33 serves as a housing for a ball 34 of a ball and socket joint.
  • the ball 34 is mounted on a rear end of a guide piece 35 adapted to receive the bolt D to be driven into a wall M.
  • the forward end of the guide piece 35 terminates in a frusto conical head 35a whose periphery cooperates with and is held by an operating sleeve 36 slidably mounted on the socket member 28.
  • the sleeve 36 is provided with a ring 37 carried in an annular groove formed in an annular flange 36a on the rearward end of the sleeve 36.
  • the part B1 is pivoted to align it with the-axis of the cover and this action causes the cartridge C to be firmly positioned in the loading chamber 25.
  • the portion 270 of the yoke also forces the piston rod forwardly torelease the conical surfaces 24b and 29d.
  • the absorption of energy is such that the pieces 33 and 35 move out of the sleeve slowly, account being taken of the fact that these pieces are carried out as a function of the power of the most powerful cartridge used in the tool.
  • a fourth braking phase comes into force and this is constituted by the periphery of the piston shaped part 29a of the piston rod 29 coming into contact with the boss 28a which then acts a second time on the shock absorber 39. It is also possible in an extreme case that the boss 28a may be overrun by the periphery of the piston shaped part 29a and this would cause further retardation.
  • FIG. 15 shows a simplified variation wherein the socket member 28 is screwed directly onto the barrel 24.
  • a rear assembly a front assembly movably secured to said rear assembly, a barrel having a loading chamber at the rear end for receiving a cartridge, means for closing said chamber, guide means disposed forwardly of said barrel and attached to the forward end of the barrel, a front guide piece having a bore for receiving and guiding said fastening element disposed forwardly of said barrel and adapted to slide relative to said guide means, a piston rod slidable in said barrel and in said guide means and in said guide piece, said rear assembly and the front guide piece being displaceable relative to each other and relative to the axis of the piston rod to provide access to said loading chamber and to the rear of said guide piece for the introduction of a cartridge behind the piston rod and the introduction of a fastening element in front of the piston rod.
  • An explosively actuated power tool as set forth in claim 1 including a spindle positioned parallel to the axis of said barrel, means securing the rear end of said spindle to said barrel, said guide piece being rotatable about said spindle to displace it with respect to the axis of the piston rod.
  • An explosively actuated power tool as set forth in claim 1 including a block slidably in said guide means and having a bore co-axial with the bore of said barrel for guiding said piston rod, pivot means connecting said guide piece to said block whereby the guide piece is pivoted relative to said barrel, an operating sleeve slidable on the guide means whereby the operating sleeve in its forward position aligns the guide piece with the block and with the axis of the barrel and when the operating sleeve is at its rearward position the guide piece may be pivoted to enable the fastening element to be introduced into the bore of said guide piece.
  • piston rod includes a rear. portion slidable in said barrel and a front portion slidable in said guide piece and a piston shaped part slidable in said guide means for abutting against the rear part of the guide means and abutting the rear end of the guide piece, the length of the guide means and the lengths of the two portions of said piston rod being such that the rod is supported at least at .two spaced apart positions along its length.
  • An explosively actuated power tool as set forth in claim 2 including a sheath within the bore of said guide piece having an annular flange at its rear end, and a shock absorber disposed between said annular flange and said guide piece.
  • an explosively actuated power tool for driving a fastening element
  • a rear assembly a front assembly movably connected to the said rear assembly, a barrel having a loading chamber for receiving a cartridge, means for closing said chamber guide means disposed forwardly of said barrel and secured thereto, a front guide piece having a bore for receiving and guiding said fastening element, said guide piece being mounted to slide relative to and be positioned in said guide means, a piston rod slidable in said barrel and in said guide means and in said guide piece, and said guide means comprising a socket member having a forward extremity split longitudinally of the socket member.
  • a rear assembly a front assembly movably connected to said rear assembly, a barrel having a loading chamber at its rearward extremity for receiving a cartridge, closure means whereby said chamber may be closed, guide means disposed forwardly of said barrel and attached to the forward end thereof, a front guide piece having a bore for receiving and guiding a fastening element, said guide piece being disposed forwardly of said barrel and adapted to slide relative to said guide means co-axially of the barrel, a piston rod adapted to slide in said barrel and in said guide means and in said guide piece, said piston rod being of such dimensions longitudinally relatve to said barrel that it may be positioned in direct contact with a cart-ridge located in the loading chamber whereby rearward movement of the piston rod serves to initiate ejection of the cartridge.
  • An explosively actuated power tool as set forth in claim 13 including retaining means maintaining said piston rod in its extreme rearward position, and said closure means being shaped to urge a cartridge into the loading chamber and to move said piston rod forwardly and disengage it from said retaining means.
  • An explosively actuated power tool as set forth in claim 11 wherein the means for closing the chamber comprises a yoke to which the barrel is pivoted, and shock absorber means positioned rearwardly of said yoke.
  • said barrel being pivotable about a transverse axis of the 10 longer of said arms, said other arm being of sufficient length to support said barrel which upon pivoting through approximately 90 may be displaced transversely of the tool.

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • Portable Nailing Machines And Staplers (AREA)
  • Toys (AREA)
  • Nozzles (AREA)
US531965A 1965-03-08 1966-03-04 Explosively actuated pusher power tool Expired - Lifetime US3409197A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CH314965A CH438170A (fr) 1965-03-08 1965-03-08 Pistolet à masselotte pour enfoncer une pièce dans un matériau dur et compact
CH1115065A CH430620A (fr) 1965-03-08 1965-08-09 Pistolet de scellement à masselotte

Publications (1)

Publication Number Publication Date
US3409197A true US3409197A (en) 1968-11-05

Family

ID=25692311

Family Applications (1)

Application Number Title Priority Date Filing Date
US531965A Expired - Lifetime US3409197A (en) 1965-03-08 1966-03-04 Explosively actuated pusher power tool

Country Status (13)

Country Link
US (1) US3409197A (xx)
JP (1) JPS4812908B1 (xx)
AT (1) AT269768B (xx)
BE (3) BE676803A (xx)
CH (3) CH433148A (xx)
DE (1) DE1603769C2 (xx)
DK (1) DK139344B (xx)
ES (1) ES323911A1 (xx)
FR (1) FR1469786A (xx)
GB (1) GB1141722A (xx)
NL (1) NL146419B (xx)
NO (2) NO115730B (xx)
SE (1) SE338954B (xx)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3494125A (en) * 1968-06-24 1970-02-10 Omark Industries Inc Powder actuated tool
US3503549A (en) * 1967-09-29 1970-03-31 Olin Mathieson Muzzle bushing for piston-type power-actuated tool
US3556381A (en) * 1967-07-14 1971-01-19 Etem Ets De Tech Mod Drving-in tool with dismountable joint of the pivoting guide-piece
US4210267A (en) * 1977-11-23 1980-07-01 Societe de Prospection et d'Inventions Techniques, S.P.I.T. Rear-loading powder-acetuated tool
US4349141A (en) * 1980-06-12 1982-09-14 Olin Corporation Piston return for powder actuated piston tool

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
NZ223074A (en) * 1987-12-23 1990-08-28 Magri Holland Ear tag applicator, rotary magazine

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3172119A (en) * 1961-09-08 1965-03-09 Olin Mathieson Explosive-powered fastening tools

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
USRE23569E (en) * 1946-09-16 1952-10-28 Device fob inserting bolts in
BE556294A (xx) * 1956-06-08
US2930042A (en) * 1957-04-09 1960-03-29 Mine Safety Appliances Co Explosively actuated nail driving tool
DE1073977B (de) * 1957-04-12 1960-01-21 Olm Mathieson Chemical Corpo ration Nev, York N Y (V St A) Arbeitsgerät dessen Kolben durch Pulvertreibstoffe oder ein gasformiges Druckmittel bewegt wird
FR1188105A (fr) * 1957-12-04 1959-09-18 Prospection Et D Inv S Tech So Perfectionnements aux pistolets de scellement destinés à enfoncer des pointes et autres articles analogues, tels que goujons, chevilles, etc., dans des matériaux durset compacts, et pistolet en résultant
DE1870395U (de) * 1961-05-24 1963-04-11 Georg Dr Groetsch Bolzensetzgeraet.
FR1387413A (fr) * 1963-02-01 1965-01-29 Bettermann Elektro Ohg Pistolet de scellement

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3172119A (en) * 1961-09-08 1965-03-09 Olin Mathieson Explosive-powered fastening tools

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3556381A (en) * 1967-07-14 1971-01-19 Etem Ets De Tech Mod Drving-in tool with dismountable joint of the pivoting guide-piece
US3503549A (en) * 1967-09-29 1970-03-31 Olin Mathieson Muzzle bushing for piston-type power-actuated tool
US3494125A (en) * 1968-06-24 1970-02-10 Omark Industries Inc Powder actuated tool
US4210267A (en) * 1977-11-23 1980-07-01 Societe de Prospection et d'Inventions Techniques, S.P.I.T. Rear-loading powder-acetuated tool
US4349141A (en) * 1980-06-12 1982-09-14 Olin Corporation Piston return for powder actuated piston tool

Also Published As

Publication number Publication date
FR1469786A (fr) 1967-02-17
CH430620A (fr) 1967-02-15
NO115730B (xx) 1968-11-18
CH438170A (fr) 1967-06-15
SE338954B (xx) 1971-09-20
DE1603769B1 (de) 1972-05-31
BE676805A (xx) 1966-07-18
BE676804A (xx) 1966-07-18
GB1141722A (en) 1969-01-29
AT269768B (de) 1969-04-10
DE1603769C2 (de) 1973-01-04
ES323911A1 (es) 1966-12-16
JPS4812908B1 (xx) 1973-04-24
DK139344C (xx) 1979-07-16
BE676803A (xx) 1966-07-18
NL146419B (nl) 1975-07-15
NL6602695A (xx) 1966-09-09
CH433148A (fr) 1967-03-31
NO115729B (xx) 1968-11-18
DK139344B (da) 1979-02-05

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