US3871565A - Cartridge-fired apparatus for driving fasteners and the like - Google Patents

Cartridge-fired apparatus for driving fasteners and the like Download PDF

Info

Publication number
US3871565A
US3871565A US334943A US33494373A US3871565A US 3871565 A US3871565 A US 3871565A US 334943 A US334943 A US 334943A US 33494373 A US33494373 A US 33494373A US 3871565 A US3871565 A US 3871565A
Authority
US
United States
Prior art keywords
piston
ram
ring
cartridge
chamber
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
US334943A
Other languages
English (en)
Inventor
Pierre Termet
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.)
Individual
Original Assignee
Individual
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 Individual filed Critical Individual
Application granted granted Critical
Publication of US3871565A publication Critical patent/US3871565A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Images

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
    • B25C1/18—Details and accessories, e.g. splinter guards, spall minimisers
    • 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

  • Cartridge fired fastener driver comprises a piston-ram [52] U 5 Cl 227/10 positioned to be driven forward by explosion of the [51] 1114 cartridge This piston has a narrowed section encircled by a stationary ring smaller in diameter than either [58] Field of Search 227/10, 11, 130 end of the pistommm so that the stroke of the piston [56] References Cited is limited to the length of its narrowed section minus UNITED STATES PATENTS the thlckness of the ring.
  • the present invention relates to an apparatus for attaching two materials to each other by using nails or pins or for driving pins or similar elements into materials such as iron, concrete or wood.
  • the invention applies especially to a fastening apparatus powered by the explosion of a cartridge and of the so-called piston-ram or hammer" type, in which the gases deriving from the explosiion of the cartridge operate in a cylindrical chamber on the head of a piston provided with a rod which drives the fastener or stud into the receiving material.
  • the present invention makes it possible to adapt the gun to the nature of the work to be carried out merely by changing the piston-ram.
  • a fastening apparatus can be quickly adapted merely by changing the pistonram, to insert pins in relatively soft materials which necessitate only a small amount of energy, such as for instance for attaching wooden bars provided with hooks which are secured to the floor all around a room, in order to hold the carpet which is fitted on the hooks.
  • the present invention relates, as a novel product of manufacture, to apparatus for driving pins or similar members of the type powered by the explosion of a cartridge and comprising a piston-ram, characterized in that the piston-ram comprises a central part and two end parts, said central part being of reduced section and moving in a stop forming ring, which is seated in the tip of the guide element of the apparatus, said ring having an orifice equal to or very slightly larger than the section of the central part of the piston-ram, but smaller than the section of either of the two end parts of the piston-ram, the end part of the piston-ram located on the side facing the explosion chamber of the cartridge having a shoulder abutting against said ring to prevent the piston-ram from leaving the guide element of the apparatus and the end part of the piston ram which engages the pin being pushed back before the firing towards the inside of the apparatus to come into contact with said ring.
  • the end part of the piston-ram which lies in the explosion chamber of the cartridge is advantageously connected to said central part of reduced section by a frusto-conical bearing shoulder which comes into contact with a concave surface of corresponding form which is provided on the stop forming ring.
  • the part of the piston-ram which engages the pin is connected to the central part of reduced section by a surface, which defines a sharp or slightly rounded edge where it meets the cylindrical peripheral surface of the front part of the piston-ram, so that said edge can come into contact with and be gripped in a slightly conical internal bearing which is provided on the surface of the stop forming ring which is directed towards the mouth of the apparatus.
  • the piston-ram is thus held in its firing position.
  • the stop ring according to the invention can be advantageously located in a movable tip capable of sliding with respect to the front end of the apparatus in order to stop the piston-ram when it strikes the ring, for instance in the case of firing on no load.
  • the piston-ram as a single part, and to make the stop forming ring in two or more parts which are radially fitted together and which are firmly held in a closed housing which is provided in the movable tip.
  • the part of the piston-ram which strikes the pin at the moment at which the pin is driven in is at the moment of firing, always located in a precisely determined position in relation to the remainder of the apparatus.
  • a piston-ram having a short length to give a large explosion chamber when one desires to drive the pin into a less resistant material uses a piston-ram which has an extended length which gives an explosion chamber of a small volume to drive a pin into a hard material.
  • the present invention has also for its object pins which can be used in the above described apparatus, and which are characterized in that they are each provided with two guiding and stop washers having the same diameter, said diameter being larger than that of the head.
  • FIG. 1 is a schematic view in axial section of the head part of a fastener driving apparatus according to the invention
  • FIGS. 2 and 3 show different embodiments of pistonrams used in the apparatus of FIG. 1,
  • FIG. 4 shows on a larger scale the part of the guide element provided with the stop forming ring
  • FIG. 5 is a view similar to FIG. I showing an embodiment of the light hammer" type.
  • FIG. 1 there is shown in heavy lines the movable tip located at the head part of the apparatus and including the particular device of the invention and the piston-ram whereas the remainder of the guide for the piston rod has been shown in fine lines.
  • FIG. 1 the cartridge chamber 1 which includes the cartridge 2 and which opens into the explosion chamber 3 located at the left end of the bore 4 of the guide member 5.
  • the movable tip generally referred to as 6 is capable of sliding towards the right relative to the guide member 5 until the stop 9 of the tip comes into engagement with the shoulder 10 of complementary form which is fixed to the guide member.
  • the piston-ram comprises: a head 11, the diameter of which is equal to or very slightly smaller than the diameter of the bore 4', a central part 12 having a smaller diameter; and an end part 13 the diameter of which is very slightly smaller than the diameter of the bore 14 of the tip 6.
  • the bore 14 of the tip 6 has the same diameter as the bore 4 of the guide member, but this equality is not critical for the invention, and it could be possible to provide apparatus in which the bore 14 has a different diameter than that of the bore 4.
  • stop forming ring 15 the orifice diameter of which is slightly larger than the diameter of the central part 12 of the piston-ram, but smaller than the diameters of the end parts 11 and 13 of the piston-ram.
  • FIG. 1 One can also see from FIG. 1 how the head 13 of the piston-ram engages a nail 16 provided with two guiding washers and the head of which is received in a recess provided on the frontal surface of the part I3 of the piston-ram.
  • a magnet device 17 ensures the location in position of the pin 16 during the preparation for firing.
  • This ring is received in a cup 18 which is screwed by threads 19 in a circular seat in the body of the tip 6.
  • the ring 15 is thus firmly held on the tip 6 in the space delimited between the internal part of the cup 18 and the surface 20 of the tip 6.
  • the stop forming ring 15 In order to permit mounting of the stop forming ring 15, the latter is made in two parts which are diametrically fitted together.
  • the cup 18 is mounted in the end part 6 by slipping the cup 18 (which does not include the stop forming ring 15) on the central part 12 of the piston-ram, by placing the two parts of the stop forming ring 15 around the central part 12 and then seating them in their housing in the cup l8, and screwing the cup into its housing in the tip 6.
  • the stop forming ring comprises on the side facing the head of the piston-ram a frusto-conical surface 21, the form of which corresponds to the form of the shoulder 22 which connects the head 11 to the central part 12 of the piston-ram (FIG. 1).
  • the stop forming ring 15 comprises also a cylindrical bore the diameter of which is equal to or very slightly larger than the diameter of the central part 12 of the piston-ram.
  • stop forming ring 15 includes two frustoconical surfaces 24 and 25.
  • frustoconical surface 25 is useful, whereas the surface 24 is simply used for connecting the frusto-conical surface 25 and the cylindrical bore 23.
  • the edge 27 which is delimited by the cylindrical part 13 of the end of the piston ram and the frusto-conical shoulder 26 which connects said part and the central part 12, comes into engagement with the frusto-conical surface 25 when the piston-ram is pushed back towards the left.
  • FIGS. 2 and 3 illustrate two other piston-rams which can be used in the above described apparatus.
  • the piston-ram of FIG. 2 is different from that shown in FIG. 1 in that its head 11a is of a shorter length.
  • the chamber 3 in which the explosion takes place has a substantially greater volume which results in reducing the force with which the piston-ram is displaced towards the right to drive in the pin 16.
  • the head llb of the piston-ram is of a greater length in order to fill quite completely the chamber 3 which is a continuation of the cartridge chamber l.
  • FIG. 3 also shows as an alternative embodiment how a pin 7 having a threaded head, can also be driven in, the head of the pin being engaged in a deeper orifice provided in the front end B of the piston-ram. Only the bottom of this orifice has the same diameter as that of the pin thread in order to avoid any binding of the latter.
  • the apparatus according to the invention which is of a particularly simple structure, makes it possible to adapt the power of the apparatus to requirements of the work to be carried out by using piston-rams of different lengths Furthermore, as illustrated in the embodiment shown in FIG. 5 it is possible to use the apparatus with a socalled light" piston-ram which comprises only a rear part II forming a piston and a rod part 12' having a reduced diameter which directly engages the pin to be driven in.
  • the ring 15 is replaced by a ring 15 which can be made of a single piece and the internal diameter of which is sufficient to permit passage of the pin and the part 12' of the piston-ram, but insufficient to permit passage of the shoulder 22', thereby allowing it to function as a stop.
  • the result is an apparatus which has the feature of being universal, merely by changing some pieces.
  • Cartridge fired apparatus for driving fasteners and the like, said apparatus comprising a housing defining a cartridge chamber for receiving a cartridge, and an explosion chamber communicating with said cartridge chamber,
  • a piston-ram having one end part slidably mounted in said explosion chamber and a central part having a smaller section than either of its end parts
  • a stop-defining ring encircling said central part at the end of said explosion chamber remote from said cartridge chamber, and fixed to a guiding tip encircling the other end part of said piston-ram on the side of said ring remote from said explosion chamber, said ring defining an orifice having a section at least equal to, but at most slightly larger than that of the central part of the piston-ram, and smaller than the section of either of said end parts,
  • said one end part of said piston-ram defining a shoulder which abuts said ring after an explosion to prevent expulsion of said piston-ram through said guide member, while the other end part of said piston-ram defines a shoulder positioned to abut said ring when said apparatus is in firing position, before explosion of a cartridge.
  • Cartridge fired apparatus for driving fasteners and the like, said apparatus comprising a housing defining a cartridge chamber for receiving a cartridge, and an explosion chamber communicating with said cartridge chamber,
  • a piston-ram having one end part slidably mounted in said explosion chamber and a central part having a smaller section than either of its end parts
  • a stop-defining ring encircling said central part at the end of said explosion chamber remote from said cartridge chamber and fixed to a guiding tip encircling the other end part of said piston-ram on the side of said ring remote from said explosion chamber, said ring defining an orifice having a section at least equal to, but at most slightly larger than that of the central part of the piston-ram, and smaller than the section of either of said end parts, and
  • said ring being made in two parts and removably mounted in said apparatus so that piston-rams of different lengths may be readily introduced into and removed from said explosion chamber,
  • said one end part of said piston-ram defining a shoulder which abuts said ring after an explosion to prevent expulsion of said piston-ram through said guide member.

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • Portable Nailing Machines And Staplers (AREA)
  • Hand Tools For Fitting Together And Separating, Or Other Hand Tools (AREA)
US334943A 1972-02-23 1973-02-22 Cartridge-fired apparatus for driving fasteners and the like Expired - Lifetime US3871565A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR7206100A FR2173413A5 (fr) 1972-02-23 1972-02-23

Publications (1)

Publication Number Publication Date
US3871565A true US3871565A (en) 1975-03-18

Family

ID=9093982

Family Applications (1)

Application Number Title Priority Date Filing Date
US334943A Expired - Lifetime US3871565A (en) 1972-02-23 1973-02-22 Cartridge-fired apparatus for driving fasteners and the like

Country Status (7)

Country Link
US (1) US3871565A (fr)
BE (1) BE795855A (fr)
DE (1) DE2309008A1 (fr)
ES (1) ES411933A1 (fr)
FR (1) FR2173413A5 (fr)
GB (1) GB1413890A (fr)
IT (1) IT979380B (fr)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5038665A (en) * 1990-02-02 1991-08-13 Honeywell Inc. Silent stud gun attachment device
US5332140A (en) * 1992-04-24 1994-07-26 Societe De Prospection Et D'inventions Techniques (S.P.I.T.) Apparatus for applying fixing elements, with plunger, plunger return catch and pivoting plug guide
US20020108488A1 (en) * 2001-02-09 2002-08-15 Stefan Bonig Piston support
FR2847192A1 (fr) * 2002-11-19 2004-05-21 Hilti Ag Outil de scellement actionne par combustion interne
CN104708591A (zh) * 2015-03-05 2015-06-17 四川德阳市力协有限责任公司 射钉枪钉管

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1542586A (en) * 1925-06-16 Chusetts
US3531037A (en) * 1966-10-03 1970-09-29 Impex Essen Vertrieb Bolt setting tool
US3556379A (en) * 1967-10-02 1971-01-19 Hilti Ag Device for driving anchoring members
US3566978A (en) * 1968-01-29 1971-03-02 Hilti Ag Apparatus for driving anchoring elements for a predetermined depth of penetration
US3632032A (en) * 1968-08-05 1972-01-04 Pierre Termet Apparatus using the energy produced by the explosion of a machine gun cartridge (shell)

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1542586A (en) * 1925-06-16 Chusetts
US3531037A (en) * 1966-10-03 1970-09-29 Impex Essen Vertrieb Bolt setting tool
US3556379A (en) * 1967-10-02 1971-01-19 Hilti Ag Device for driving anchoring members
US3566978A (en) * 1968-01-29 1971-03-02 Hilti Ag Apparatus for driving anchoring elements for a predetermined depth of penetration
US3632032A (en) * 1968-08-05 1972-01-04 Pierre Termet Apparatus using the energy produced by the explosion of a machine gun cartridge (shell)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5038665A (en) * 1990-02-02 1991-08-13 Honeywell Inc. Silent stud gun attachment device
US5332140A (en) * 1992-04-24 1994-07-26 Societe De Prospection Et D'inventions Techniques (S.P.I.T.) Apparatus for applying fixing elements, with plunger, plunger return catch and pivoting plug guide
US20020108488A1 (en) * 2001-02-09 2002-08-15 Stefan Bonig Piston support
FR2847192A1 (fr) * 2002-11-19 2004-05-21 Hilti Ag Outil de scellement actionne par combustion interne
CN104708591A (zh) * 2015-03-05 2015-06-17 四川德阳市力协有限责任公司 射钉枪钉管

Also Published As

Publication number Publication date
BE795855A (fr) 1973-08-23
ES411933A1 (es) 1976-04-16
DE2309008A1 (de) 1973-08-30
GB1413890A (en) 1975-11-12
IT979380B (it) 1974-09-30
FR2173413A5 (fr) 1973-10-05

Similar Documents

Publication Publication Date Title
US2724116A (en) Explosively actuated fastener driving tool
US4313552A (en) Apparatus for driving fasteners
US5860580A (en) Piston retention device for combustion-powered tools
US5310108A (en) Hammer-strikable, powder-actuated, fastener-driving tool
US4519536A (en) Apparatus for driving nails using an impact hammer
GB1015098A (en) Improvements in or relating to fastener driving devices
US3566978A (en) Apparatus for driving anchoring elements for a predetermined depth of penetration
US4793226A (en) Manual device for driving screws
GB1318028A (en) Power tool and automatic feed therefor
US3623646A (en) Fastener-inserting machine
US3871565A (en) Cartridge-fired apparatus for driving fasteners and the like
US3490673A (en) Fastener driving tool
GB1379240A (en) Cartridge-actuated fastener-driving tools
GB1517848A (en) Cartridge-powered fastener-driving tool
GB846445A (en) Explosively actuated driving tool
US4960235A (en) Nail set device
US3302840A (en) Explosively actuated fastener driving tool
US3249279A (en) Bolt and charge operated tool for driving in a bolt
US4830252A (en) Hammer-activated, powder-actuated drive tool
US3698599A (en) Feed to driving tool having band held screws
US4333595A (en) Offset piston for powder actuated tools
US3534895A (en) Powder-actuated tool
GB998896A (en) Improved explosively actuated fastener driving tool
US3776443A (en) Fastener driving tool with slidable fastener guide
US2449860A (en) Nail driving attachment for pneumatic hammers