US3556379A - Device for driving anchoring members - Google Patents

Device for driving anchoring members Download PDF

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Publication number
US3556379A
US3556379A US758095A US3556379DA US3556379A US 3556379 A US3556379 A US 3556379A US 758095 A US758095 A US 758095A US 3556379D A US3556379D A US 3556379DA US 3556379 A US3556379 A US 3556379A
Authority
US
United States
Prior art keywords
housing
barrel
cartridge chamber
bore
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
US758095A
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English (en)
Inventor
Wolfgang Bayer
Karl-Ernst Udert
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.)
Hilti AG
Original Assignee
Hilti AG
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Hilti AG filed Critical Hilti AG
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Publication of US3556379A publication Critical patent/US3556379A/en
Anticipated expiration legal-status Critical
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
    • B25C1/143—Hand-held nailing tools; Nail feeding devices operated by combustion pressure generated by detonation of a cartridge acting on an intermediate plunger or anvil trigger operated

Definitions

  • a protective cap 6 Secured in threaded engagement within the muzzle end of the first housing part I is a protective cap 6 which extends forwardly from the muzzle end and contains a guide insert 7 having an opening for receiving anchoring members 8 to be driven from the device.
  • a barrel 12 Within the first housing part I and extending from its rearward end to the protective cap 6 is a barrel 12 which forms an axially extending bore 11 in the align ment with the opening through the guide insert 7.
  • the hammer piston 9 has an enlarged head portion 9a which is in surface contact with the bore through the barrel while its forward end has a smaller diameter and is fitted into surface engagement with the opening through the guide insert 7.
  • a cartridge chamber 13 At the rearward end of the barrel, in axial alignment with the bore, is a cartridge chamber 13 having a passageway 13a communicating between the chamber and the bore.
  • an annular surface Ila defines the effective surface area of the barrel 12 at the rearward end of the bore 11.
  • a breech block which is biased by means of a spring 14 against the rearward end of the barrel l2.
  • a firing pin 16 Secured within the breech block 15 is a firing pin 16 disposed in parallel relationship with the axis of the bore and arranged to contact the base of a cartridge disposed within the cartridge chamber 13 in the barrel 12.
  • the firing pin 16 is supported in a replaceable insert 22 fitted within the breech block 15, and it extends rearwardly into a hole 21 formed in breech block 15.
  • the replaceable insert 22 provides a closure for the rearward end of the cartridge chamber 13.
  • a pin-shaped guide member 18 Aligned behind the hole 21 and the breech block 15 is a pin-shaped guide member 18 which provides a support for the forward end of the spring 14.
  • a reversing plate 17 is guided within a slot 23 located below the plug 22 and pivots about a pin 24.
  • the reversing plate 17 extends upwardly within the hole 21, and its surfaces 17a and 1711 are arranged to be placed in positive connection with the rearward end of the firing pin 16.
  • FIG. I the device is shown in a starting position with the surface 170 of the reversing plate 17 resting on a cam 25a and with its surface 17a directed against the flange at the rearward end of the firing pin 16 and urging it toward the rear.
  • a trigger 26 Disposed below the breech block 15, in the handle part 3 of the device, is a trigger 26 arranged to pivot about a pin 27.
  • a lever 30 is secured to the trigger by means of pin 29 and is arranged in positive engagement with a striker pin 31 extending upwardly through the handle part and terminating immediately below the open space through the housing containing the reversing plate 17.
  • the striker pin Within the handle part the striker pin is guided and is pushed downwardly by a spring 32 against a second spring 33 which serves to cock the striker pin.
  • a screw 34 retains the second spring 33 in position.
  • a cam collar 35 is rotatably mounted on pin 4 at the rearward end of the first housing part 1.
  • the cam collar 35 has a groove 35a which is engaged by a cam 25b of cam collar 25, mounted on the forward end of the second housing part 2, see FIG. 2.
  • the cam 25b engaged within the groove 35a, provides a stop for the pivoting motion of the front housing part 1 relative to the second housing part 2.
  • a cartridge 36 is shown within the cartridge chamber 13, and it can be ejected by a mechanism consisting of a pivoting arm 37 and an ejector 38.
  • the forward end of the pivoting arm 37 is secured by means of a pin 40 within a recess 39 in the first housing part I and is arranged to pivot about the pin 40.
  • the arm 37 extends rearwardly from the recess 39 into a recess 41 located in the second housing part 2, note FIGS. 2 and 4.
  • the ejector 38 is mounted within the barrel 12 to pivot about pin 42 which is loaded by a spring 43 and keeps the ejector in the position shown in FIG. 3.
  • the first housing part 1 is secured to the second housing part 2 by means of a spring-loaded ball 44 fitted within a recess in first housing part 1 and arranged to interengage in a corresponding recess 45 in the second housing part 2. Additionally, the first housing part I is secured in place by means of the pivoting arm 37 located within the recesses 39 and 41 of the first and second housing parts 1 and 2.
  • FIG. 5 a portion of the device containing the hammer piston 9 in the rearward end of the bore 11, the cartridge chamber 13. and the breech block 15 are shown in a schematic arrangement to illustrate the relative areas acted upon by the forces F1, F2, generated by a cartridge exploded within the chamber 13. The following is an explanation of the manner in which the device operates.
  • the arm 37 is pivoted about pin 40 outwardly in the direction of the arrowf, and thereby permits a pivoting motion of the first housing part I about the pin 4 moving relative to the second housing part 2.
  • the barrel 12 is contained wholly within the first housing part 1.
  • a cartridge 36 can be inserted into the cartridge chamber 13 and the housing part pivoted back into the closed position and the arm 37 pivoted back to its initial position opposite to the direction of the arrow f.
  • a nail or stud 8 is introduced into the muzzle end of the device, being inserted into the opening in guide insert 7 and being pushed rearwardly by hand operated means, such as a rod, until the head portion of the anchoring member contacts the forward end of the hammer piston 9 and urges its head portion 9a rearwardly within the bore into contact with the annular surface Ila at the rearward end of the bore.
  • the forward end of the guide insert is pressed against the target material and the insert 7 rides rearwardly, forcing the barrel 12 and the breech block 15 to move through the distance a within the open space within the housing parts 1 and 2, see FIG. 1.
  • the rearward movement of the plug brings the device into the firing position in which the surface 170 of the reversing plate 17 is lifted from the cam 25a.
  • the device is ready to be fired, and when the trigger 26 is pulled backwards, it urges the lever 30 against the striker pin, and the striker pin is released and jumps upwardly striking the bottom surface of the reversing plate 17 and causing its surface 17b to hit the rearward end of the firing pin 16, driving it forwardly against the base of the cartridge 36 and causing the cartridge to explode.
  • the force of the gas generated when the cartridge is exploded acts against the hammer piston head 9a driving the piston through the bore and through the opening in the guide insert 7 and thereby driving the anchoring mechanism into the target material.
  • reaction force F2 is split into two components, the component F2 which is proportional to the annular area 11a at the end of the bore and acting in the rearward direction against the barrel l2 and the component F2 which is proportional to the largest cross-sectional area A2 within the cartridge chamber 13 and as a result, acts against the breech block 15 which by means of the replaceable insert 22, forms a closure at the base or rearward end of the cartridge chamber. If the annular area and the crosssectional area A2 are of the same size, then the two components of force, F2 and F2", are also of the same magnitude.
  • the annular area Ila which forms the end of the bore within the barrel is equal to the cross-sectional area A2 within the cartridge magazine, and if the mass of the barrel l2 and the mass of the breech block are identical. then the breech block 15 and the barrel 12 are accelerated at the same rate by the equal forces F2 and F2", and as a result, a forcelocking connection is effected between these two parts during their movement toward the rearward end of the device, Such a force-locking connection obviates the need for expensive locking mechanisms for securing the two parts together.
  • the annular area lla at the end of the bore in the barrel may be larger than the cross-sectional area A2 within the cartridge magazine and balancing of the acceleration forces can be achieved by correspondingly dimensioning the masses of the plug and the barrel.
  • the device can be removed from the target material.
  • the arm 37 is pivoted out of its normal operating position, shown in FIG. 3, and it moves in the direction of the arrow f, then the first housing part is pivoted about the pin 4 out of alignment with the second housing part until it reaches the stop formed by the cam 25b.
  • the housing parts 1, 2 pivoted apart, by pushing Y the arm 37 further in the direction of arrow f, the arm 38b of the ejector 38 is pushed in the direction of the cartridge chamber 13, and as it pivots about the pin 42, the arm 38a ejects the spent cartridge casing from the cartridge chamber and the device is now ready to be reloaded for another cycle of anchor insertion.
  • a device for driving anchoring members into a hard target material such as iron, concrete, and the like comprising a housing, said housing comprising a first part and a second part in axial alignment and forming an axially extending open space extending through said first part and said second part, said first part forming the muzzle end of said housing and said second part forming the rearward end of said housing, means for pivoting said first part relative to said second part about an axis parallel to the axis of the open space stantially smaller than the cross-sectional area of said bore in said barrel, a breech block positioned in the second part of said housing and within the open space through said housing rearwardly of said barrel and arranged to form a closure for the rearward end of said cartridge chamber, means disposed within said second part of said housing and adapted to discharge a cartridge positioned within said cartridge chamber within said barrel, resilient means disposed within the rearward end of said open space in said second part of said housing in contact with the rearward end of said breech
  • said hammer piston comprises a head portion having a larger diameter than a longitudinally extending shank portion which extends therefrom toward the muzzle end of said barrel, said head portion being arranged to fit in contacting relationship with the surface of the bore within said barrel and the forward end of said shank portion being arranged to fit within and in contacting relationship with the opening through said guide insert, said barrel has an annular surface forming the rearward end of said bore, said annular surface encircling the opening between said bore and said cartridge chamber, said means for pivoting said first part of said housing relative to said second part thereof comprising a pin affixed within said second part of said housing and extending forwardly therefrom in parallel relationship with the axis of the open space through said housing toward the muzzle end of said housing, said first part of said housing pivotally mounted on said pin, means mounted on said pin adjacent the interface of said first and second parts of said housing for forming a stop for the pivotal motion of said first part relative to said second part, said means adapted to discharge a cartridge comprising a firing pin mounted
  • said breech block contains a replaceable insert aligned rearwardly of and forming a closure for the base of said cartridge chamber, said replaceable insert having an opening therethrough supporting the forward end of said firing pin.

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • Portable Nailing Machines And Staplers (AREA)
US758095A 1967-10-02 1968-09-06 Device for driving anchoring members Expired - Lifetime US3556379A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DEH0064058 1967-10-02
DE1603843A DE1603843C3 (de) 1967-10-02 1967-10-02 Pulverkraftbetriebenes Bolzensetzgerät der Treibkolbenbauart

Publications (1)

Publication Number Publication Date
US3556379A true US3556379A (en) 1971-01-19

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ID=25753525

Family Applications (1)

Application Number Title Priority Date Filing Date
US758095A Expired - Lifetime US3556379A (en) 1967-10-02 1968-09-06 Device for driving anchoring members

Country Status (4)

Country Link
US (1) US3556379A (de)
DE (1) DE1603843C3 (de)
FR (1) FR1586719A (de)
GB (1) GB1226397A (de)

Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3871565A (en) * 1972-02-23 1975-03-18 Pierre Termet Cartridge-fired apparatus for driving fasteners and the like
AU640802B2 (en) * 1990-07-17 1993-09-02 Hilti Aktiengesellschaft Powder-operated setting machine
US20040134959A1 (en) * 2002-11-04 2004-07-15 Michael Maier Setting tool
US20080106019A1 (en) * 2006-11-08 2008-05-08 Hilti Aktiengesellschaft Positioning device with actuating switching means for a hand-held setting tool
US20080302846A1 (en) * 2007-03-08 2008-12-11 Tomarco Contractor Specialties, Inc. Explosive discharge actuated tool for driving fasteners
US20090159634A1 (en) * 2007-12-25 2009-06-25 Chung-Heng Lee Powder-actuated fastener-driving tool
US20110068239A1 (en) * 2009-09-23 2011-03-24 Tomarco Contractor Specialties, Inc. Attachment for fastener driven by powder charge setting tool
US20110198383A1 (en) * 2010-02-12 2011-08-18 Fernando Masas Apparatus for installing explosively driven fasteners and fasteners for use therewith
US20110198382A1 (en) * 2010-02-12 2011-08-18 Fernando Masas Apparatus for installing explosively driven fasteners and fasteners for use therewith
US20150097016A1 (en) * 2010-02-12 2015-04-09 Fernando Masas Apparatus for installing explosively driven fasteners and fasteners for use therewith

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3168744A (en) * 1963-02-01 1965-02-09 Omark Industries Inc Explosively-actuated stud-driving tool
US3172119A (en) * 1961-09-08 1965-03-09 Olin Mathieson Explosive-powered fastening tools
US3469504A (en) * 1963-08-26 1969-09-30 Omark Industries Inc Impact dissipating device

Patent Citations (3)

* 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
US3168744A (en) * 1963-02-01 1965-02-09 Omark Industries Inc Explosively-actuated stud-driving tool
US3469504A (en) * 1963-08-26 1969-09-30 Omark Industries Inc Impact dissipating device

Cited By (16)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3871565A (en) * 1972-02-23 1975-03-18 Pierre Termet Cartridge-fired apparatus for driving fasteners and the like
AU640802B2 (en) * 1990-07-17 1993-09-02 Hilti Aktiengesellschaft Powder-operated setting machine
US20040134959A1 (en) * 2002-11-04 2004-07-15 Michael Maier Setting tool
US6905055B2 (en) * 2002-11-04 2005-06-14 Hilti Aktiengesellschaft Setting tool
US7597227B2 (en) * 2006-11-08 2009-10-06 Hilti Aktiengesellschaft Positioning device with actuating switching means for a hand-held setting tool
US20080106019A1 (en) * 2006-11-08 2008-05-08 Hilti Aktiengesellschaft Positioning device with actuating switching means for a hand-held setting tool
US20080302846A1 (en) * 2007-03-08 2008-12-11 Tomarco Contractor Specialties, Inc. Explosive discharge actuated tool for driving fasteners
US7575139B2 (en) 2007-03-08 2009-08-18 Tomarco Contractor Specialties, Inc. Explosive discharge actuated tool for driving fasteners
US20090159634A1 (en) * 2007-12-25 2009-06-25 Chung-Heng Lee Powder-actuated fastener-driving tool
US7708177B2 (en) * 2007-12-25 2010-05-04 Chung-Heng Lee Powder-actuated fastener-driving tool
US20110068239A1 (en) * 2009-09-23 2011-03-24 Tomarco Contractor Specialties, Inc. Attachment for fastener driven by powder charge setting tool
US8052366B2 (en) 2009-09-23 2011-11-08 Tomarco Contractor Specialties, Inc. Attachment for fastener driven by powder charge setting tool
US20110198383A1 (en) * 2010-02-12 2011-08-18 Fernando Masas Apparatus for installing explosively driven fasteners and fasteners for use therewith
US20110198382A1 (en) * 2010-02-12 2011-08-18 Fernando Masas Apparatus for installing explosively driven fasteners and fasteners for use therewith
US8397969B2 (en) * 2010-02-12 2013-03-19 Nitroset, Llc Apparatus for installing explosively driven fasteners and fasteners for use therewith
US20150097016A1 (en) * 2010-02-12 2015-04-09 Fernando Masas Apparatus for installing explosively driven fasteners and fasteners for use therewith

Also Published As

Publication number Publication date
DE1603843B2 (de) 1976-04-08
DE1603843C3 (de) 1981-04-30
DE1603843A1 (de) 1971-09-16
GB1226397A (de) 1971-03-24
FR1586719A (de) 1970-02-27

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