US3923227A - Tapered seal between the barrel and drum type magazine in a fastening element setting gun - Google Patents

Tapered seal between the barrel and drum type magazine in a fastening element setting gun Download PDF

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Publication number
US3923227A
US3923227A US531444A US53144474A US3923227A US 3923227 A US3923227 A US 3923227A US 531444 A US531444 A US 531444A US 53144474 A US53144474 A US 53144474A US 3923227 A US3923227 A US 3923227A
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US
United States
Prior art keywords
barrel
tapered
bore
magazine
bores
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
US531444A
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English (en)
Inventor
Elmar Maier
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
Application granted granted Critical
Publication of US3923227A publication Critical patent/US3923227A/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
    • B25C1/12—Hand-held nailing tools; Nail feeding devices operated by combustion pressure generated by detonation of a cartridge acting directly on the bolt
    • 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
    • B25C1/182—Feeding devices

Definitions

  • the rearward end of the bore in the barrel has a rearwardly divergent tapered surface arranged to seat in' matching and contacting engagement with a similarly tapered surface within the bore of the magazine so that the joint between the two tapered surfaces extends in the rearwa-rd direction of the gun from the interior of the barrel bore.
  • the outer surface of the barrel at its rearward end is also tapered for matching engagement with a similarly tapered surface in the adjacent end of the bores in the drum type magazine.
  • the present invention is directed to an explosive charge driven setting gun for inserting fastening elements into a receiving material and includes an axially movable barrel displaceable into the firing position by moving it into one end of-a bore in a drum type magazine and, more particularly, it concerns a tapered seal provided between the rear end of the barrel and the front end of the bore in the magazine.
  • Fastening element setting guns are known in which the end of the barrel tapers downwardly toward its rearward end. Further, in such setting guns using drum type magazines for accommodating the cartridges, the face of the magazine directed toward the barrel is provided with a countersunk portion having a taper which matches the one on the barrel. When the barrel is displaced rearwardly for placing the setting gun in the firing condition, the tapered surface on the barrel is disposed in contacting engagement with the countersunk tapered surface in the magazine. This abutting connection, in addition to providing a centering effect, affords a seal for the expansion chamber within the gun.
  • the problem previously experienced is overcome by providing a tapered surface within the bore in the barrel which converges in the driving direction of the gun and a matching tapered surface within the bore in the drum type magazine arranged to seat in contacting engagement with the tapered surface in the barrel when the barrel is displaced rearwardly into the firing position.
  • The'tapered surface within the magazine bore is provided by the outer end surface of a bushing which is adjustably positionable within the bore so that it does not project beyond the front face of t he magazine. This arrangement prevents the tapered"'end of the bushing from projecting into the barrel bore which would interfere with the rotation of the magazine for aligning another cartridge containing bore with the barrel.
  • the inner surface of the magazine bore spaced outwardly from the bushing is enlarged for a portion of the bore extending fromthe front face of the drum type magazine.
  • Another advantage of the arrangement provided by the present invention is the ability to adjust the space between the exterior of the barrel and the interior of the tapered surface of the bore in the magazine due to the axial adjustment of the bushing which is tapered on its outside surface to match the tapered surface in the interior of the bore of the barrel.
  • Such adjustment can be provided in a particularly simple manner by placing the bushings in threaded engagement with the bore in the drum type magazine.
  • this arrangement also insures that the matching tapers on the interior of the barrel and in the bore of the drum type magazine reliably rest against each other in the firing condition of the gun so that the barrel is not supported by any other parts'of the drum type magazine.
  • the remainder of the magazine body may be formed of a lighter material such as an aluminum alloy.
  • a noteworthy weight reduction can be obtained by such an arrangement as compared to the use of solid steel magazines.
  • other materials can be used for the barrel and the bushing by which the sealing action as well as the wear on the barrel and the magazine can be influenced positively.
  • FIG. I is a side view partly in section of an explosive charge driven setting gun
  • FIG. 2 is an enlarged partial view of the setting gun shown in FIG. 1 with the parts of the setting gun displaced into the firing condition.
  • the fastening element setting gun has a twopart housing 1.
  • a barrel 2 is axially movably positioned within the housing.
  • the barrel 2 has a flat or axially extending recess 3 in its outer surface into which a stop screw 4, extending through the' housing, is seated.
  • a compression spring 5 is positioned about the forward end of the barrel for displacing it in the axial direction.
  • a safety pin 6 secures a fragmentation protection cap 7 to the housing.
  • the barrel At its rearward end within the housing, the barrel has a tapered surface 8 within the barrel bore and another tapered surface 9 on the outer surface of the barrel.
  • a chamber 11 is formed within the housing 1 to accommodate a drum type magazine 13 mounted on a shaft 12 so that the magazine is movable in the axial direction of the barrel.
  • Angularly spaced bores 14, 14a are provided in the drum type magazine each arranged to contain a cartridge 15, 15a and a nail-shaped fastening element 16, 16a, respectively.
  • Axially positionable bushings 17, 17a are disposed in threaded engagement with the surfaces in the forward ends of the magazine bores 14, 14a respectively.
  • the leading ends 18, 18a of the bushings have a frusto conical configuration and are spaced radially inwardly from the juxtaposed surfaces of the magazine bore.
  • each of the forward bushing portions 18, 18a has a tapered surface arranged to match the tapered surface 8 within the bore at the rearward erid of the barrel 2.
  • annularly shaped open spaces 22, 22 a are pro- .vided inwardly from the front face 21 of the magazine about the forward portions 18, 18a of the bushings.
  • the spaces 22, 22a are provided by forming tapered surfaces 23, 23a within the magazine bores diverging outwardly to the front face 21 of the magazine.
  • a firing pin 24 for igniting the cartridges shown in the position of the cartridge 15.
  • the firing pin is part of a known firing mechanism and, therefore, has not been illustrated in detail.
  • a spring 25 biases a pressure bushing 26 toward the forward end of the setting gun and the bushing also serves as a support for one end of the shaft 12 on which the drum type magazine is rotatably mounted.
  • the spring 25 and bushing 26 bias the magazine 13 forwardly and keep it out of the range of the firing pin 24 when the setting gun is in the non-firing or inoperative condition.
  • the barrel 2 When the barrel 2 is displaced rearwardly from the position shown in FIG. 1, by being pressed against a receiving material, it is moved into the firing position with the tapered surface 8 within the bore of the barrel disposed in matching contact with the tapered surface 19 on the outer surface of the bushing so that a seal is provided between the two tapered surfaces, note FIG. 2.
  • the joint formed between the tapering surfaces 8 and 19 extends from the interior of the bore in the barrel rearwardly opposite to the normal direction of flow of the explosive gases within the barrel, that is, opposite to the driving direction of the setting gun.
  • An annular gap 27 is formed between the outwardly facing tapered surface 9 on the rearward end of the barrel 2 and the inwardly facing tapered surface 23 within the magazine bore adjacent the forward face 21 of the magazine. Any gases which are generated when a cartridge is exploded and might possibly escape between the tapered surface 8 on the barrel and the tapered surface 19 on the bushing are abruptly deflected and slowed down by the annular gap 27 before leaving this part of the setting gun in the direction of the arrows A.
  • the optimum size of the annular gap 27 is adjustable by moving the bushing axially within the magazine bore. However, the forward end of the bushing is retained rearwardly of the forward face 21 of the magazine 13 so that it does not interfere with the rotation of the magazine when a loaded bore is moved into alignment with the barrel bore after a cartridge has been fired.
  • an explosive charge driven fastening element setting gun comprising a housing, a barrel with a bore therethrough having a forward muzzle end and an oppositely directed rearward end, and said barrel being axially displaceably mounted in said housingand movable rearwardly through said housing into the firing position, a drum type magazine mounted in said housing rearwardly of said barrel, said magazine having a forward face extending transversely of the axis of said barrel and facing toward the forward end of said barrel and a rearward face facing in the opposite direction, said magazine having bores therethrough extending in the I axial direction of said barrel and arranged to align with said barrel, the rearward end of said barrel and the ends of said bores in said drum adjacent the forward face thereof each have matching tapered surfaces, wherein the improvement comprises that said matching tapered surfaces include a first tapering surface in the rearward end of the bore in said barrel and said first tapering surface diverging toward the rearward end of the barrel, and a second tapered surface formed within the bore in said magazine with said second tapered surface facing outwardly
  • said barrel has a fourth tapered surface formed on the outer surface of said barrel at its rearward end with said fourth tapered surface converging in the direction away from the forward end of said barrel, said third tapered surface arranged in matching relationship with said fourth tapered surface so that it forms a narrow annular gap therebetween when said barrel is displaced rearwardly to the firing position.
  • a bushing is axially adjustably positionable within each of the bores in said drum adjacent the forward face of said drum.
  • said second tapered surfaces being formed on the outer surfaces of said bushing at the ends thereof adjacent the forward face of said drum, said second tapered surfaces in each said bore being spaced radially inwardly from the third tapered surfaces formed by the surface of the bores.

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • Portable Nailing Machines And Staplers (AREA)
US531444A 1973-12-13 1974-12-10 Tapered seal between the barrel and drum type magazine in a fastening element setting gun Expired - Lifetime US3923227A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE2362073A DE2362073C2 (de) 1973-12-13 1973-12-13 Pulverkraftbetriebenes Bolzensetzgerät mit Trommelmagazin

Publications (1)

Publication Number Publication Date
US3923227A true US3923227A (en) 1975-12-02

Family

ID=5900680

Family Applications (1)

Application Number Title Priority Date Filing Date
US531444A Expired - Lifetime US3923227A (en) 1973-12-13 1974-12-10 Tapered seal between the barrel and drum type magazine in a fastening element setting gun

Country Status (12)

Country Link
US (1) US3923227A (de)
JP (1) JPS5091077A (de)
AT (1) AT331739B (de)
CA (1) CA1017177A (de)
CH (1) CH574308A5 (de)
DE (1) DE2362073C2 (de)
FI (1) FI58272C (de)
FR (1) FR2254404B1 (de)
GB (1) GB1467047A (de)
IT (1) IT1022261B (de)
SE (1) SE418264B (de)
ZA (1) ZA746958B (de)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20140021236A1 (en) * 2010-06-25 2014-01-23 Handy & Harman Installation Tool for Universal Fastener
US11359383B2 (en) 2019-04-23 2022-06-14 Omg, Inc. Hidden fastener assembly for attaching grooved deck members
US11873648B2 (en) 2020-03-26 2024-01-16 Omg, Inc. Deck clip

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3005341A1 (de) * 1980-02-13 1981-08-20 Hilti AG, 9494 Schaan Pulverkraftbetriebenes bolzen-setzgeraet

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2930041A (en) * 1955-12-22 1960-03-29 Ile D Etude De Procedes De Sce Cartridge operated fastening gun
US2984836A (en) * 1955-06-24 1961-05-23 Novotech Anstalt Firing tool with ammunition, more particularly for use as a pin driving tool
US3048850A (en) * 1959-03-17 1962-08-14 Arden L Schilling Universal stud driver

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2984836A (en) * 1955-06-24 1961-05-23 Novotech Anstalt Firing tool with ammunition, more particularly for use as a pin driving tool
US2930041A (en) * 1955-12-22 1960-03-29 Ile D Etude De Procedes De Sce Cartridge operated fastening gun
US3048850A (en) * 1959-03-17 1962-08-14 Arden L Schilling Universal stud driver

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20140021236A1 (en) * 2010-06-25 2014-01-23 Handy & Harman Installation Tool for Universal Fastener
US10605288B2 (en) 2010-06-25 2020-03-31 Omg, Inc. Hidden deck fastener
US11359383B2 (en) 2019-04-23 2022-06-14 Omg, Inc. Hidden fastener assembly for attaching grooved deck members
US11873648B2 (en) 2020-03-26 2024-01-16 Omg, Inc. Deck clip

Also Published As

Publication number Publication date
CA1017177A (en) 1977-09-13
FR2254404B1 (de) 1978-11-24
IT1022261B (it) 1978-03-20
FI58272C (fi) 1981-01-12
ATA772874A (de) 1975-11-15
DE2362073C2 (de) 1983-08-25
AT331739B (de) 1976-08-25
FI58272B (fi) 1980-09-30
CH574308A5 (de) 1976-04-15
ZA746958B (en) 1975-11-26
GB1467047A (en) 1977-03-16
SE418264B (sv) 1981-05-18
FR2254404A1 (de) 1975-07-11
JPS5091077A (de) 1975-07-21
AU7600774A (en) 1976-06-03
SE7413671L (de) 1975-06-16
FI318974A (de) 1975-06-14
DE2362073A1 (de) 1975-06-19

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