US3490329A - Bolt for explosive actuated bolt setter - Google Patents

Bolt for explosive actuated bolt setter Download PDF

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Publication number
US3490329A
US3490329A US676811A US3490329DA US3490329A US 3490329 A US3490329 A US 3490329A US 676811 A US676811 A US 676811A US 3490329D A US3490329D A US 3490329DA US 3490329 A US3490329 A US 3490329A
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bolt
setter
jacket
plastic
plastic jacket
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US676811A
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Karl Rudolf Pratorius
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Hilti AG
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Hilti AG
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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16B—DEVICES FOR FASTENING OR SECURING CONSTRUCTIONAL ELEMENTS OR MACHINE PARTS TOGETHER, e.g. NAILS, BOLTS, CIRCLIPS, CLAMPS, CLIPS OR WEDGES; JOINTS OR JOINTING
    • F16B19/00—Bolts without screw-thread; Pins, including deformable elements; Rivets
    • F16B19/14—Bolts or the like for shooting into concrete constructions, metal walls or the like by means of detonation-operated nailing tools

Definitions

  • a bolt or the like for an explosive actuated bolt setter is disclosed as extending through a close fitting plastic jacket which is a tough, elastic and preferably cold flowing plastic.
  • the jacket extends to substa'rlltially the point area of the bolt and has an annular guiding element engageable with the bolt guiding tube of the setter, the annular guiding element having a larger diameter than the plastic jacket.
  • the plastic jacket extends primarily around only the central area of the bolt and has an outside diameter corresponding to the inside diameter of the bolt guiding tube of the setter.
  • the plastic jacket protects that area of the bolt which is primarily subjected to buckling possibilities during driving of the bolt, and the plastic jacket absorbs the forces tending to buckle the bolt.
  • This invention relates to bolts for explosive actuated bolt setters and, more particularly, to an improved bolt which can be driven into concrete having a compressive strength of up to about B 750 (750 kg./cm. by explosive actuated bolt setters.
  • the bolt at least in the central portion of its shaft, carries a plastic jacket to reduce the buckling danger.
  • This plastic jacket must consist of a tough, elastic and preferably cold flowing plastic.
  • the plastic jacket has the advantage that the area of the bolt primarily subjected to buckling during driving of the bolt is protected by the jacket, and so effectively that no buckling of the bolt occurs.
  • the forces influencing a buckling of the bolt can be absorbed in two ways.
  • the forces counteracting the buckling are supplied directly by the applied jacket and, in this case, the jacket expediently extends through the point area of the bolt.
  • the plastic jacket At the point area of the bolt, has an annular guiding element engageable against the inner surface of the bolt guiding tube of the explosive actuated setter, and this annular element has a diameter larger than that of the plastic jacket.
  • the plastic jacket surrounds primarily the central area of the shaft of the bolt, and has an outside diameter corresponding to the inside diameter of the bolt guiding tube of the explosive actuated setter.
  • the thrust piston of a thrust piston setter may also serve as a bolt guiding tube if it is bored out to a sufiicient depth. Only that part of the bolt which is to be driven in still protrudes from the thrust piston, so that a controllable penetration depth is obtained. This is also of interest when driving bolts into steel.
  • An object of the present invention is to provide an improved bolt for driving by explosive actuated bolt setters.
  • Another object of the invention is to provide such a bolt having at least its midportion embraced by a plastic sleeve or jacket, with the plastic consisting of a tough, elastic and preferably cold flowing plastic.
  • a further object of the invention is to provide such a bolt in which the jacket extends to the point area of the bolt and an annular guiding element is provided on the plastic jacket adjacent the point area of the bolt and has guiding relation with the guiding tube of a bolt setter.
  • Still another object of the invention is to provide such a bolt in which the annular guiding element has a diameter larger than that of the plastic jacket.
  • a further object of the invention is to provide such a bolt in which the plastic jacket extends primarily only around the central area of the shaft of the bolt, and has an outside diameter corersponding to the inside diameter of the bolt guiding tube of the setter.
  • FIG. 1 is an axial sectional view of one form of bolt embodying the invention
  • FIG. 2 is a partial axial sectional View through a bolt setter and the bolt of FIG. 1 illustrating the bolt while being driven;
  • FIGS. 3 and 4 are axial sectional views of other forms of bolts embodying the invention.
  • FIG. 5 is a view similar to FIG. 2 illustrating yet another form of bolt embodying the invention as being driven by a bolt setter.
  • a commercial nail or bolt 1 to be used with an explosive actuated bolt setter is illustrated as enclosed by a plastic jacket 2 made of a tough elastic and preferably cold flowing plastic. Adjacent the point end of the bolt, a guide element, ring, or washer 3 is provided.
  • piston 5 of the explosive actuated bolt setter is illustrated as having partly driven in bolt 1 which is centered in setter barrel 6 by means of guide element 3.
  • plastic jacket 2 is deformed to prevent buckling of the bolt, and is expanded into contact with the bolt guiding tube 6 in the same manner as guide element 3 has the guiding engagement in setter barrel 6.
  • the plastic jacket 2 is illustrated as formed with hollow spaces 10 which provide a better compressibility of the bolt without loss of guiding quality by the plastic jacket.
  • the jacket extends nearly the full length of the bolt and is provided with a guiding element 3 adjacent the point area of the bolt.
  • FIG. 5 illustrates an arrangement in which the forces counteracting buckling are supplied by the bolt guiding tube 6 immediately at the start of the driving in process.
  • a plastic jacket 2' surrounds the central portion only of bolt or nail 1, and is formed with outwardly opening channels or the like providing annular ribs having a guiding engagement with the inner surface of bolt setter tube 6. The forces are transmitted to the shaft of bolt 1 through plastic jacket 2'.
  • a fastener for use with an explosive actuated setter of the type having a hammer piston for imparting driving energy to the fastener, and a bolt guiding tube, said fastener comprising, in combination, a relatively elongated shank portion having a driving point at one end thereof and an enlarged head at the other end; and a sleeve of cold flowing type synthetic plastic material embracing at least the central portion of said shank; said sleeve being a relatively thick sleeve formed with a plurality of axially spaced annular interior cavities opening onto said shank, and separated from each other by annular portions of the sleeve embracing said shank, -said fastener including a separate annular guide element mounted on said sleeve adjacent the point area of said shank and having an outside diameter larger than the outside diameter of said sleeve.

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Portable Nailing Machines And Staplers (AREA)

Description

Jan. 20, 1970 p A-ro us 3,490,329
BOLT FOR EXPLOSIVE ACTUATED BOLT SETTER Filed Oct. 20. 1967 /u van/r04 Kim Qua; Pmm/Q/w Arm/(WE Y:
United States Patent 3 Claims ABSTRACT OF THE DISCLOSURE A bolt or the like for an explosive actuated bolt setter is disclosed as extending through a close fitting plastic jacket which is a tough, elastic and preferably cold flowing plastic. In one case, the jacket extends to substa'rlltially the point area of the bolt and has an annular guiding element engageable with the bolt guiding tube of the setter, the annular guiding element having a larger diameter than the plastic jacket. In another case, the plastic jacket extends primarily around only the central area of the bolt and has an outside diameter corresponding to the inside diameter of the bolt guiding tube of the setter.
The plastic jacket protects that area of the bolt which is primarily subjected to buckling possibilities during driving of the bolt, and the plastic jacket absorbs the forces tending to buckle the bolt.
Background of the invention Up to the present time, a satisfactory penetration of a bolt driven into target material by explosive actuated setters is assured only when the target material has a compressive strength which does not exceed a certain value. These conditions must be taken into account, for example, in fastening sheet metal to concrete. The present limit of compressive strength is about 500 kg./crn. (B 500) When the compressive strength of the target material is greater than this, the danger of the bolt buckling increases considerably.
Summary of the invention This invention relates to bolts for explosive actuated bolt setters and, more particularly, to an improved bolt which can be driven into concrete having a compressive strength of up to about B 750 (750 kg./cm. by explosive actuated bolt setters.
In accordance with the invention, the bolt, at least in the central portion of its shaft, carries a plastic jacket to reduce the buckling danger. This plastic jacket must consist of a tough, elastic and preferably cold flowing plastic.
The plastic jacket has the advantage that the area of the bolt primarily subjected to buckling during driving of the bolt is protected by the jacket, and so effectively that no buckling of the bolt occurs. The forces influencing a buckling of the bolt can be absorbed in two ways. In one case, the forces counteracting the buckling are supplied directly by the applied jacket and, in this case, the jacket expediently extends through the point area of the bolt. At the point area of the bolt, the plastic jacket has an annular guiding element engageable against the inner surface of the bolt guiding tube of the explosive actuated setter, and this annular element has a diameter larger than that of the plastic jacket.
In the other case, the plastic jacket surrounds primarily the central area of the shaft of the bolt, and has an outside diameter corresponding to the inside diameter of the bolt guiding tube of the explosive actuated setter. Thereby, the force counteracting the buckling force is supplied by 3,490,329 Patented Jan. 20, 1970 the bolt guiding tube and transmitted to the shaft of the bolt through the plastic jacket.
The thrust piston of a thrust piston setter may also serve as a bolt guiding tube if it is bored out to a sufiicient depth. Only that part of the bolt which is to be driven in still protrudes from the thrust piston, so that a controllable penetration depth is obtained. This is also of interest when driving bolts into steel.
An object of the present invention is to provide an improved bolt for driving by explosive actuated bolt setters.
Another object of the invention is to provide such a bolt having at least its midportion embraced by a plastic sleeve or jacket, with the plastic consisting of a tough, elastic and preferably cold flowing plastic.
A further object of the invention is to provide such a bolt in which the jacket extends to the point area of the bolt and an annular guiding element is provided on the plastic jacket adjacent the point area of the bolt and has guiding relation with the guiding tube of a bolt setter.
Still another object of the invention is to provide such a bolt in which the annular guiding element has a diameter larger than that of the plastic jacket.
A further object of the invention is to provide such a bolt in which the plastic jacket extends primarily only around the central area of the shaft of the bolt, and has an outside diameter corersponding to the inside diameter of the bolt guiding tube of the setter.
Brief description of the drawings For an understanding of the principles of the invention, reference is made to the following description of typical embodiments thereof as illustrated in the accompanying drawings.
In the drawings:
FIG. 1 is an axial sectional view of one form of bolt embodying the invention;
FIG. 2 is a partial axial sectional View through a bolt setter and the bolt of FIG. 1 illustrating the bolt while being driven;
FIGS. 3 and 4 are axial sectional views of other forms of bolts embodying the invention; and
FIG. 5 is a view similar to FIG. 2 illustrating yet another form of bolt embodying the invention as being driven by a bolt setter.
Description of the preferred embodiments Referring to FIG. 1, a commercial nail or bolt 1, to be used with an explosive actuated bolt setter, is illustrated as enclosed by a plastic jacket 2 made of a tough elastic and preferably cold flowing plastic. Adjacent the point end of the bolt, a guide element, ring, or washer 3 is provided.
Referring to FIG. 2, piston 5 of the explosive actuated bolt setter is illustrated as having partly driven in bolt 1 which is centered in setter barrel 6 by means of guide element 3. During the driving by piston 5, plastic jacket 2 is deformed to prevent buckling of the bolt, and is expanded into contact with the bolt guiding tube 6 in the same manner as guide element 3 has the guiding engagement in setter barrel 6.
In the embodiments of the invention shown in FIGS. 3 and 4, the plastic jacket 2 is illustrated as formed with hollow spaces 10 which provide a better compressibility of the bolt without loss of guiding quality by the plastic jacket. In both embodiments shown in FIGS. 3 and 4, the jacket extends nearly the full length of the bolt and is provided with a guiding element 3 adjacent the point area of the bolt.
FIG. 5 illustrates an arrangement in which the forces counteracting buckling are supplied by the bolt guiding tube 6 immediately at the start of the driving in process. In this case, a plastic jacket 2' surrounds the central portion only of bolt or nail 1, and is formed with outwardly opening channels or the like providing annular ribs having a guiding engagement with the inner surface of bolt setter tube 6. The forces are transmitted to the shaft of bolt 1 through plastic jacket 2'.
What is claimed is:
1. A fastener for use with an explosive actuated setter of the type having a hammer piston for imparting driving energy to the fastener, and a bolt guiding tube, said fastener comprising, in combination, a relatively elongated shank portion having a driving point at one end thereof and an enlarged head at the other end; and a sleeve of cold flowing type synthetic plastic material embracing at least the central portion of said shank; said sleeve being a relatively thick sleeve formed with a plurality of axially spaced annular interior cavities opening onto said shank, and separated from each other by annular portions of the sleeve embracing said shank, -said fastener including a separate annular guide element mounted on said sleeve adjacent the point area of said shank and having an outside diameter larger than the outside diameter of said sleeve.
References Cited UNITED STATES PATENTS 1,320,622 11/1919 Kennedy 85-70 3,289,522 12/ 1966 Bell. 3,320,845 5/ 1967 Eschweiler. 3,377,903 4/1968 Korte. 2,811,901 11/1957 Barr.
RAMON S. BRI'ITS, Primary Examiner US. Cl. X.R.
US676811A 1967-10-20 1967-10-20 Bolt for explosive actuated bolt setter Expired - Lifetime US3490329A (en)

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Cited By (19)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3955462A (en) * 1972-04-21 1976-05-11 Oswald Willy Thorsman Fastener with deformable portion for guiding pins or the like
US4190304A (en) * 1976-09-30 1980-02-26 Schneider Robert J Apparatus for use in the construction and decoration of upholstered furniture and the like
US4619430A (en) * 1981-05-29 1986-10-28 Anchor Wire Corporation Of Tennessee Picture frame hanger
US4669169A (en) * 1981-05-29 1987-06-02 Anchor Wire Corporation Of Tennessee Method of mounting an article to a substrate
US4932821A (en) * 1986-03-03 1990-06-12 Hilti Aktiengesellschaft Nail retaining strip
US5359938A (en) * 1990-10-24 1994-11-01 Olin Corporation Ultra light weight sabot
WO1997012152A1 (en) * 1995-09-29 1997-04-03 Rotter Martin J Fastener
US5632585A (en) * 1995-02-21 1997-05-27 Hilti Aktiengesellschaft Attachment member for securing plates of considerable thickness to structural members
US5785478A (en) * 1994-04-26 1998-07-28 Rotter; Martin J. Fastener
US20050091822A1 (en) * 2003-10-31 2005-05-05 Powers Fasteners, Inc. Method and apparatus for fixing assembly having resilient tool connection
US7004704B1 (en) * 2004-09-30 2006-02-28 Illinois Tool Works Inc. Flute positioner
US20070053768A1 (en) * 2005-09-07 2007-03-08 Hilti Aktiengesellschaft Fastening element with a washer
US20080000571A1 (en) * 2006-06-30 2008-01-03 City University Of Hong Kong Concrete reinforcement
US20110241246A1 (en) * 2010-04-05 2011-10-06 Tindall Corporation Expandable molding insert apparatus and method
US8066463B2 (en) * 2007-03-21 2011-11-29 Simpson Strong-Tie Company, Inc. Sleeve protected fastener
US20120114446A1 (en) * 2010-11-04 2012-05-10 Hilti Aktiengesellschaft Fastening device
US20120298716A1 (en) * 2011-05-23 2012-11-29 Ricardo Segura Fastener collation having a collation of frangible fastener alignment caps
US20190128358A1 (en) * 2016-06-12 2019-05-02 The Boeing Company Load Controlling Bolted Flange Deformable Spacers
USD986044S1 (en) 2020-08-03 2023-05-16 Simpson Strong-Tie Company Inc. Fastener sleeve

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1320622A (en) * 1919-11-04 Joseph xemtedy
US2811901A (en) * 1954-08-23 1957-11-05 Aircraft Armaments Inc Method and apparatus for sabot removal
US3289522A (en) * 1964-11-30 1966-12-06 Star Expansion Ind Corp Washer assembly with fastener
US3320845A (en) * 1964-08-26 1967-05-23 Eschweiler Peter Pin for driving into stone or metal building elements
US3377903A (en) * 1964-11-10 1968-04-16 Korte Wilhelmus Everardus Method of fastening an article by means of a bolt to be shot into said article, and means for carrying out said method

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1320622A (en) * 1919-11-04 Joseph xemtedy
US2811901A (en) * 1954-08-23 1957-11-05 Aircraft Armaments Inc Method and apparatus for sabot removal
US3320845A (en) * 1964-08-26 1967-05-23 Eschweiler Peter Pin for driving into stone or metal building elements
US3377903A (en) * 1964-11-10 1968-04-16 Korte Wilhelmus Everardus Method of fastening an article by means of a bolt to be shot into said article, and means for carrying out said method
US3289522A (en) * 1964-11-30 1966-12-06 Star Expansion Ind Corp Washer assembly with fastener

Cited By (27)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3955462A (en) * 1972-04-21 1976-05-11 Oswald Willy Thorsman Fastener with deformable portion for guiding pins or the like
US4190304A (en) * 1976-09-30 1980-02-26 Schneider Robert J Apparatus for use in the construction and decoration of upholstered furniture and the like
US4619430A (en) * 1981-05-29 1986-10-28 Anchor Wire Corporation Of Tennessee Picture frame hanger
US4669169A (en) * 1981-05-29 1987-06-02 Anchor Wire Corporation Of Tennessee Method of mounting an article to a substrate
US4932821A (en) * 1986-03-03 1990-06-12 Hilti Aktiengesellschaft Nail retaining strip
US5359938A (en) * 1990-10-24 1994-11-01 Olin Corporation Ultra light weight sabot
US5785478A (en) * 1994-04-26 1998-07-28 Rotter; Martin J. Fastener
US5632585A (en) * 1995-02-21 1997-05-27 Hilti Aktiengesellschaft Attachment member for securing plates of considerable thickness to structural members
WO1997012152A1 (en) * 1995-09-29 1997-04-03 Rotter Martin J Fastener
US7093338B2 (en) * 2003-10-31 2006-08-22 Powers Fasteners, Inc. Method and apparatus for fixing assembly having resilient tool connection
US20050091822A1 (en) * 2003-10-31 2005-05-05 Powers Fasteners, Inc. Method and apparatus for fixing assembly having resilient tool connection
US20070050964A1 (en) * 2003-10-31 2007-03-08 Powers Fasteners Inc. Method and apparatus for fixing assembly having resilient tool connection
US20060104743A1 (en) * 2004-09-30 2006-05-18 Illinois Tool Works, Inc. Flute positioner
US7004704B1 (en) * 2004-09-30 2006-02-28 Illinois Tool Works Inc. Flute positioner
US20070053768A1 (en) * 2005-09-07 2007-03-08 Hilti Aktiengesellschaft Fastening element with a washer
US7326016B2 (en) * 2005-09-07 2008-02-05 Hilti Aktiengesellschaft Fastening element with a washer
US20080000571A1 (en) * 2006-06-30 2008-01-03 City University Of Hong Kong Concrete reinforcement
US7799154B2 (en) * 2006-06-30 2010-09-21 City University Of Hong Kong Concrete reinforcement
US8066463B2 (en) * 2007-03-21 2011-11-29 Simpson Strong-Tie Company, Inc. Sleeve protected fastener
US20110241246A1 (en) * 2010-04-05 2011-10-06 Tindall Corporation Expandable molding insert apparatus and method
US8807982B2 (en) * 2010-04-05 2014-08-19 Tindall Corporation Expandable molding insert apparatus and method
US20120114446A1 (en) * 2010-11-04 2012-05-10 Hilti Aktiengesellschaft Fastening device
US8926250B2 (en) * 2010-11-04 2015-01-06 Hilti Aktiengesellschaft Fastening device
US20120298716A1 (en) * 2011-05-23 2012-11-29 Ricardo Segura Fastener collation having a collation of frangible fastener alignment caps
US20190128358A1 (en) * 2016-06-12 2019-05-02 The Boeing Company Load Controlling Bolted Flange Deformable Spacers
US10955022B2 (en) * 2016-06-12 2021-03-23 The Boeing Company Load controlling bolted flange deformable spacers
USD986044S1 (en) 2020-08-03 2023-05-16 Simpson Strong-Tie Company Inc. Fastener sleeve

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