US3275209A - Nail-driving device - Google Patents

Nail-driving device Download PDF

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Publication number
US3275209A
US3275209A US315313A US31531363A US3275209A US 3275209 A US3275209 A US 3275209A US 315313 A US315313 A US 315313A US 31531363 A US31531363 A US 31531363A US 3275209 A US3275209 A US 3275209A
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United States
Prior art keywords
nail
muzzle
inner housing
housing
bore
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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
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US315313A
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English (en)
Inventor
Hansen Kern Borje Emanuel
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Individual
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Individual
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Publication date
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Publication of US3275209A publication Critical patent/US3275209A/en
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    • 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

  • the present invention relates to a nail-driving device, comprising a mainly tubular cylinder housing with a cylindrical bore, one end of which terminates in a muzzle.
  • the muzzle has a cylindrical bore the diameter of which corresponds to the largest outer diameter of the nail which is to be driven and is placed for this purpose in the muzzle.
  • the bore of the cylinder is closed at its inner end by a wall having a hole, in which an explosive charge is to be placed.
  • a handle preferably of the pistol grip type, containing a driver pin for initiating said charge and a triggering device for the pin is arranged on the outer side of the wall closing the cylinder.
  • a piston which can move in the bore of the cylinder coacts with a driver extending from the end facing the muzzle and is of such a length that when the piston bears against the wall having the through hole, the driver extends into the bore of the muzzle.
  • Nail-driving devices of the above-mentioned kind are previously known, but have the disadvantages of being very heavy, difiicult to take apart and of having a powerful recoil movement.
  • the purpose of the present invention is to eliminate the above-mentioned disadvantages, by creating a light naildriving device, which is easy to take apart, easy to load, and with which the operator does not feel any recoil movement.
  • the cylinder housing in the device is subjected to a certain minimum pressure in the nail-driving direction by the operator, through the handle, and in that the piston in the cylinder housing is braked at the end of its movement, so that the braking force and said minimum pressure together compensate the pressure which arises through the initiation of the explosive charge.
  • the weight of the piston and driver should be as low as possible in relation to the weight of the other parts of the device.
  • said braking is achieved through air compression, which moreover involves the advantage that when a driving action has been completed, the air cushion presses the piston back to its starting position.
  • the striker pin and the triggering device are made in such a way that they together form a mainly cylindrical unit, which can easily be inserted and removed through a cylindrical aperture in the handle. This unit is also very easy to take apart.
  • FIG. 1 shows a complete nail-driving device according to the invention illustrating the most essential parts of the device
  • FIG. 2 shows the nail-driving device opened and ready for loading
  • FIG. 3 also shows the nail-driving device opened in such a way that the protruding lug of the triggering device is visible
  • FIG. 4 shows the device according to the last-mentioned figure in a section in which it is shown how the lug can be actuated so that the triggering device can be removed
  • FIG. 5 shows a partly exploded view of the triggering device
  • FIGS. 6, 7 and 8 show the device in diiferent working phases
  • FIG. 9 shows the details of the triggering device
  • FIGS. 10 and 11 show the gas flow conditions in the cylinder housing in different working phases
  • FIG. 12 shows a graph of the forces, in relation to time, which act upon the handle of the device.
  • One end of the cylinder housing is closed by a muzzle 3, which has a cylindrical bore 4.
  • Said bore has a diameter mainly corresponding to the diameter of the head of the nail which is to be driven.
  • a nail 5 with its head 6 is shown to be inserted into the muzzle.
  • a washer 7 is placed on it.
  • a sealing ring 8 preferably made of some plastic material, has been placed, as well as a ring 9 made of metal.
  • a suitable plastic material is polyurethane, known and available in the market under the trademark Trekollam 4020.
  • a cylindrical driver 10 is inserted, the other end of which bolt is joined to a piston 11.
  • the piston is provided with a circumferential groove 12, in which a sealing ring 13, preferably an O-ring, is placed.
  • a cylindrical extension 14 of the plunger extends into a cylindrical hole 15 in a closing plug 16, which is screwed into the other end of the cylinder housing.
  • the hole 15 has an extension 17, with a smaller diameter suitable to accommodate a cartridge 18, the flange 18a of which rests against the plane end surface of the closing plug.
  • In a peripheral line round the cylinder housing 1 there are three holes 19, arranged at an angle of from each other. In addition to said holes, there are also three holes 20, arranged along a peripheral line at an angle of 120 from each other.
  • the piston 11 and the driver 10' may be made of magnetic material to facilitate retention of the nail in the muzzle.
  • the cylinder housing is encircled by a protective casing 21, which can be displaced along the cylinder housing.
  • the displacement is limited to the direction towards the handle, owing to the closing plug 16 being provided with a flange 22, which functions as a stopping lug.
  • the casing 21 is held against this stopping lug by a spring 23, one end of which bears against the cylinder housing 1 and the other end against the casing 21.
  • the casing 21 is rotatably supported in a ring 24, and is retained in this ring with the aid of a screw 25 and a groove 26 in the casing 21.
  • the ring is rotatably supported in a trigger guard 29, which is fixed to the handle 30, by means of a stud 27 and a pin 28.
  • the end of the casing 21, which bears against the flange 22, has locking lugs 31, which engage in a corresponding groove 32 in the handle 30.
  • a cylindrical hole 33 with a groove 34.
  • a cylindrical unit 35 which comprises the triggering device is inserted.
  • Said unit has a transversal hole 36, in which a scar 37 is inserted, which actuates a sear spring 38.
  • the bolt has a transversal hole 39 in which the front end of a firing pin 40 is inserted.
  • the sear 37 has a bearing surface 41, which blocks the firing pin 40.
  • the scar 37 also has a lug 42, which is guided in the groove 34.
  • the hole 39 has an extension 43 in the cylindrical unit 35.
  • a spring 44 holds the cylindrical unit 35 against the closing plug 16.
  • the firing pin 40 is hollow, and is open at the end facing the handle. In the hole of the pin there is a spring 45, the end of which rests against the bottom of the hole 33. The spring 45 biases the firing pin 40 into the direction of the closing plug 16.
  • the pin 40 is provided with a groove 46, so that the pin with the aid of a screw 47 cannot leave the cylindrical unit 35.
  • the pin 40 has a flange 47A, guided in a sleeve 48, provided with a flange 49, at the end opposite the bottom of the hole 33.
  • a trigger 50 pivotal on a pin 51 in the handle.
  • the trigger has a protrusion 52, which via a leaf spring 53 can actuate the lug 42 when the lug is in a position above the leaf spring or directly above the protrusion 52.
  • the hole 33 accommodates a sleeve 54, which is held in place by a screw 55.
  • the trigger guard 29 has a guiding member 56, which extends into the groove 34, which is shaped to permit insertion of the cylindrical unit 53 into the hole 33 in spite of the protrusion 52.
  • the above-mentioned nail-driving device functions in such a way that, before driving in a nail, it is broken up as shown in FIG. 2.
  • the cartridge 18 is inserted into the hole 17 and the nail into the bore of the muzzle 3.
  • the device is thereafter closed, as shown in FIG. 1.
  • the casing 21 is then turned in the direction indicated by the arrow, which secures the locking lugs in the groove.
  • the device is now loaded, as is further shown in FIG. 6.
  • the nail to be used is preferably a steel nail.
  • the muzzle is placed against the wall point at which the nail is to be driven in, as shown in FIG. 7.
  • the material into which the nail is to be driven is usually concrete or iron.
  • the piston 11 is braked during the latter part of its movement, owing to the fact that, when the piston has passed the holes 19 and 20, air is compressed in the space formed between the piston and the ring 9. When the driving has been completed, the piston is moved back to its original position by said compressed air.
  • FIGS. 10 and 11 it is shown how air and gases flow through the holes 19 and 20, and how said air compression takes place.
  • the unit which consists of the piston 11, the cylinder 14 and the bolt 10 has as low a weight as possible in relation to the rest of the device.
  • the nail-driving device as described is easy to disassemble and reassemble, which is extremely favorable from the point of view of servicing.
  • FIGS. 3 to 5 it is shown how easy it is to insert and to remove the triggering device with the firing pin.
  • a nail-driving device has been manufactured, and when driving nails into both concrete and iron it has not produced any noticeable recoil.
  • the complete device as manufactured weighed 1.5 kg.
  • the striker bolt 10, the plunger 11 and the cylinder 14 weighed 35 grammes together.
  • the diameter of the cylinder housing was 15 mm. and its length of bore was mm.
  • the height of the piston 11 was 10 mm., and the length of the driver was 85 mm. and its diameter 7 mm.
  • the cylindrical extension had a height of 10 mm. and a diameter of 8 mm.
  • the hole 15 had a height of 11 mm. and a diameter adapted to the cylinder 14.
  • the hole 17 above it had a diameter of 6 mm.
  • the cartridges used were cartridges known in the market as Fiocchi cartridges for nail-driving guns, 6.6 mm., of the black and yell-ow types.
  • the volume of the air which was compressed during the last part of the movement of the piston 11 at the beginning of the compression was 4.7 cm.
  • the hole 19 had a diameter of 6 mm. and a distance of 35 mm. from the ring 9.
  • the hole 20 had the same diameter, with a center distance of 47 mm.
  • the force with which the cylinder part is held against the respective transverse end wall of the hole 33 is between 13 and 14 kg.
  • a nail driving device comprising an outer housing and an inner housing encompassed by the outer housing, said inner housing being lengthwise displacea-ble in reference to the outer housing and having a lengthwise bore; a muzzle for receiving a nail to be driven at one end of the bore of said inner housing, said muzzle having an inner diameter substantially equal to the largest outer diameter of the nail; an end wall at the other end of said inner housing Ibore, said end wall having an aperture therethrough to define a chamber for receiving an explosive charge therein; a handle assembly pivotally mounted on said outer housing for pivoting the handle assembly into and out of abutment with the outside of said apertured end wall of said inner housing rbore, said handle assembly comprising a triggering assembly including a firing pin and a spring coacting with said pin for propelling the same into said chamber to detonate a charge inserted therein, spring loading means slidable in said handle assembly and controlled by the position of the inner housing in reference to the outer housing, said spring loading means being engaged with said apertured housing end wall for loading
  • a nail-driving device according to claim 1 wherein the weight of the plunger including the weight of the striker in relation to the weight of the remaining components of the device is approximately 1:30.
  • a nail-driving device according to claim 1 wherein said inner housing has in its wall a row of three circumferentially, uniformly spaced venting ports.
  • a nail-driving device according to claim 5 wherein said inner housing has in its wall a second row of several circumferentially spaced venting ports, said two rows being lengthwise spaced.
  • a nail-driving device according to claim 1 wherein a sealing ring made of flexible material is provided at the end of the muzzle facing said bore of the inner housing.
  • a nail-driving device wherein a second sealing ring made of a rigid material is superimposed upon said first ring on the side thereof facing said bore of the housing.
  • a nail-driving device according to claim 1 wherein said plunger has a peripheral groove and a sealing ring is fitted in said groove.
  • a nail-driving device according to claim 1 wherein the piston and the nail-driving bolt are made of magnetic material.
  • a nail-driving device according to claim 1 wherein said piston is formed with an extension on its side facing said apertured end wall of the inner housing, said extension being insertable into said wall aperture.
  • a nail-driving device wherein said aperture is set off within the thickness of the end wall to define two different diameters within the depth of the aperture, the set-off portion of the aperture adjacent to the housing bore having a diameter fitting said extension and the other set-off portion having a diameter fitting said explosive charge.
  • a nail-driving device according to claim 1 wherein one of said housings has an external lug at one end, said lug forming an abutment limiting displacement of the inner housing in reference to the outer housing.
  • said locking means comprise a spring-loaded sear disposed within the handle assembly transversely movable in reference to the striker pin between a position blocking lengthwise displacement of the firing pin and a position releasing the pin for such movement, and a trigger hinged to the handle assembly and engageable with said sear to move the same from its blocking position into its release position upon actuation .of the trigger.

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • Portable Nailing Machines And Staplers (AREA)
US315313A 1962-10-23 1963-10-10 Nail-driving device Expired - Lifetime US3275209A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
SE1133262 1962-10-23
SE467263A SE216217C1 (enrdf_load_stackoverflow) 1962-10-23 1963-04-29

Publications (1)

Publication Number Publication Date
US3275209A true US3275209A (en) 1966-09-27

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ID=26654543

Family Applications (1)

Application Number Title Priority Date Filing Date
US315313A Expired - Lifetime US3275209A (en) 1962-10-23 1963-10-10 Nail-driving device

Country Status (10)

Country Link
US (1) US3275209A (enrdf_load_stackoverflow)
BE (1) BE638263A (enrdf_load_stackoverflow)
CH (1) CH434148A (enrdf_load_stackoverflow)
DE (1) DE1478924B1 (enrdf_load_stackoverflow)
ES (1) ES292632A1 (enrdf_load_stackoverflow)
FI (1) FI40884B (enrdf_load_stackoverflow)
FR (1) FR1372321A (enrdf_load_stackoverflow)
GB (1) GB1011901A (enrdf_load_stackoverflow)
NL (2) NL299427A (enrdf_load_stackoverflow)
SE (1) SE216217C1 (enrdf_load_stackoverflow)

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3593902A (en) * 1967-12-11 1971-07-20 Gunnebo Bruks Ab Device for nailing gun
US3643850A (en) * 1969-12-16 1972-02-22 Japan Drive It Pin-driving tool
US3816951A (en) * 1973-01-30 1974-06-18 Gunnabo Bruks Ag Trigger mechanism for cartridge tool
US4086682A (en) * 1975-10-03 1978-05-02 Accles And Shelvoke Limited Device for use in the humane slaughtering of animals
US6032847A (en) * 1997-07-02 2000-03-07 Hilti Aktiengesellschaft Setting tool
US20080257934A1 (en) * 2007-04-18 2008-10-23 Hideyuki Tanimoto Nailing machine
CN105312012A (zh) * 2015-09-23 2016-02-10 宋波 改进型高压气体发生器

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AU529351B2 (en) * 1978-04-05 1983-06-02 Olin Corporation Powder actuated fastening tool
CA1220302A (en) * 1983-05-24 1987-04-14 Harry M. Haytayan Powder-actuated fastener-driving tool
DE4010518A1 (de) * 1990-04-02 1991-10-10 Hilti Ag Gasbetriebenes arbeitsgeraet

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB744822A (en) * 1952-10-31 1956-02-15 Rolf Bertelsmann An improved device for driving bolts or short pointed members into constructional parts
US2765464A (en) * 1955-06-16 1956-10-09 Chester Tietig Nail-size extender for gas-actuated nail drivers
CA585084A (en) * 1959-10-13 Ramset Fasteners Power surge tool
US3050732A (en) * 1957-11-29 1962-08-28 Termet Pierre Fastener driving interlocking pistol or tool
US3065560A (en) * 1957-12-04 1962-11-27 Sarmi S A Soc D Applic De Rech Firing mechanism for guns

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US23569A (en) * 1859-04-12 Improved machine for nicking heads of screws
USRE23569E (en) * 1946-09-16 1952-10-28 Device fob inserting bolts in
DE913759C (de) * 1950-06-01 1954-06-18 Langensiepen Kg M Vorrichtung zum Eintreiben von Bolzen od. dgl. in einen Bauteil
US3019440A (en) * 1955-01-12 1962-02-06 Olin Mathieson Fastener arresting device for a power actuated tool
BE556294A (enrdf_load_stackoverflow) * 1956-06-08
US2877750A (en) * 1957-05-29 1959-03-17 Olin Mathieson Hammer and buffer mechanism

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CA585084A (en) * 1959-10-13 Ramset Fasteners Power surge tool
GB744822A (en) * 1952-10-31 1956-02-15 Rolf Bertelsmann An improved device for driving bolts or short pointed members into constructional parts
US2765464A (en) * 1955-06-16 1956-10-09 Chester Tietig Nail-size extender for gas-actuated nail drivers
US3050732A (en) * 1957-11-29 1962-08-28 Termet Pierre Fastener driving interlocking pistol or tool
US3065560A (en) * 1957-12-04 1962-11-27 Sarmi S A Soc D Applic De Rech Firing mechanism for guns

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3593902A (en) * 1967-12-11 1971-07-20 Gunnebo Bruks Ab Device for nailing gun
US3643850A (en) * 1969-12-16 1972-02-22 Japan Drive It Pin-driving tool
US3816951A (en) * 1973-01-30 1974-06-18 Gunnabo Bruks Ag Trigger mechanism for cartridge tool
US4086682A (en) * 1975-10-03 1978-05-02 Accles And Shelvoke Limited Device for use in the humane slaughtering of animals
US6032847A (en) * 1997-07-02 2000-03-07 Hilti Aktiengesellschaft Setting tool
US20080257934A1 (en) * 2007-04-18 2008-10-23 Hideyuki Tanimoto Nailing machine
US8720765B2 (en) * 2007-04-18 2014-05-13 Hitachi Koki Co., Ltd. Nailing machine
CN105312012A (zh) * 2015-09-23 2016-02-10 宋波 改进型高压气体发生器
CN105312012B (zh) * 2015-09-23 2018-04-24 宋波 改进型高压气体发生器

Also Published As

Publication number Publication date
DE1478924B1 (de) 1970-11-12
DE1728398B2 (de) 1976-02-05
SE216217C1 (enrdf_load_stackoverflow) 1967-10-17
FI40884B (enrdf_load_stackoverflow) 1969-02-28
BE638263A (enrdf_load_stackoverflow) 1964-02-03
NL140171B (nl) 1973-11-15
GB1011901A (en) 1965-12-01
ES292632A1 (es) 1964-02-16
DE1728398A1 (de) 1972-03-09
FR1372321A (fr) 1964-09-11
CH434148A (de) 1967-04-15
NL299427A (enrdf_load_stackoverflow) 1965-08-25

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