Hilti Aktiengesellschaft

Norbert Pfister

Gerhard Ehmig

Mario Grazioli

Gebhard Gantner

Tilo Dittrich

Anton Hirtl

Norbert Heeb

Markus Frommelt

Norbert Welte

Peter Goepfert

Sybille Renner

Leo Philipp

Gunther Grosslercher

The invention describes a combustion&#x2014;operated working tool, in particular a setting tool for fastening elements, having a guide cylinder () axially displaceable relative to the device housing (); a piston () displaceably mounted in the guide cylinder (); a housing&#x2014;integral stop (), which projects into the guide cylinder () to delimit an engagement part of the piston () in the direction of advance of the piston (), when the guide cylinder () is shifted in the direction of advance of the piston (); and an elastic adjusting element (), which is tensioned upon moving the guide cylinder () into the device housing () and by virtue of which an engagement part () can be driven for carrying the piston () opposite to the direction of advance of the piston (), after extension of the guide cylinder () out of the device housing ().

Combustion&#x2014;powered working tool, in particular a setting tool for fastening elements

An explosive powder charge-operated setting tool for driving fastening elements in a constructional component includes a propellant-driven setting mechanism, an ignition element () for igniting a propellant () received in the propellant receptacle () of the setting mechanism, and a transporting device () for displacing a propellant magazine in a guide channel () and including elements operable by the ignition element () for displacing the transporting device from a first position in which the transportation of propellants is prevented, into a second position in which at least partial transportation of the propellants is possible.

Combustion power-operated setting tool

A high pressure gas operated setting tool and including guide cylinder, a fastening element guide (6) arranged, in a setting direction, in front of the guide cylinder and axially displaceable against a spring-biasing force in a direction opposite to the setting direction by a maximum amount (S), a drive piston (8) axially displaceable in the guide cylinder, a return device for displacing the drive piston to its ignition-ready position, and an elastic resetting element (9), surrounding the stem (82) of the drive piston and extending between the stop (73) of the guide cylinder (7) and a front, in the setting direction, end surface of the drive piston head (81), the resetting element (9) having a length corresponding at least to a maximum distance (A) between the stop (73) and the front end surface (83) of the drive piston head (81) reduced by the amount of the axial displacement of the fastening element guide (6).

Cartridge setting tool

A high pressure gas-operated setting tool, and including a driving piston (21, 41, 61, 81) displaceable in a piston guide (7, 27, 47, 67) and having a stem (8, 28, 48, 68) and a head (9, 29, 49, 69), and a return member surrounding the stem (8, 28, 48, 68) and arranged between a stop (17), provided on the piston guide (7, 27, 47, 67) and facing in a direction opposite to a setting direction, and a front, in the setting direction, end face (18, 38, 58, 78) of the head (9, 29, 49, 69), with the return member being formed as a hollow cylindrical structural member of an elastic material and having a plurality of openings (12, 32, 34, 52, 72) which alternate, in a longitudinal direction, with layers of the elastic material.

Setting tool

A setting tool for driving-in nail-shaped fastening elements into hard constructional components and including a housing (10, 110), a guide cylinder (20, 120) displaceable in the housing (10, 110) in a direction opposite to a setting direction against a spring-biasing force, a drive piston (40, 140) axially displaceable in the guide cylinder (20, 120), and a pivotal resetting element (50, 150) having a first lever arm (51, 151) cooperating with the drive piston (40, 140) for resetting the drive piston (40, 140) to its inoperative position and a second lever arm (152) cooperating with the guide cylinder (20, 120) for displacing the first lever arm (151) in accordance with displacement of the guide cylinder (120).

A high-pressure gas-operated setting tool for driving nail-shaped fastening elements into hard constructional components and including a slide (73) displaceable in a guide housing (7) under action of a portion of the high-pressure gas, which is used for displacement of the drive piston (6) in the setting direction, against a biasing force of a spring (8) and having a pawl projecting into the axial projection of the drive piston (6), the pawl (78) displacing the drive piston upon the slide (73) being displaced by the spring (8) in a direction opposite to the setting direction.

A setting tool for driving nail-shaped attachment elements into a hard structural component, including a housing (1), a guide cylinder (8) located in the housing (1), a drive piston (7) axially displaceable in the guide cylinder (8) and having a driving surface (74), a spring-biased lever-shaped resetting member (1) pivotable in a plane extending parallel to a setting direction and engageable with the driving surface (74), and a device for displacing the resetting member (1) out of a plane of axial projection of the driving surface (74) into a release position of the resetting member.

An explosive powder charge operated setting tool includes a housing (1), a handle (2) located on the housing, a piston guide (4) and a firing pin guide (8) each located within and being axially displaceable relative to the housing against the force of a damping device (17) bearing against a trailing end stop face within the housing directed in the driving direction. The housing (1) forms an axially extended receiving space (24) for guiding the piston guide (4). The receiving space has an axial length (LA) between a leading end face of the housing and a leading end face of the firing pin guide in a first position. The piston guide (4) has an axial length (LK) coinciding at the most with the axial length (LA) of the receiving space.

Fastening element setting tool with shock damper

An explosive powder charge operated setting tool including a housing(1), a stud guide(3) projecting beyond the housing(1) in a setting direction and axially displaceable relative to the housing(1), a guide channel(4) extending substantially transverse to a longitudinal extent of the stud guide(3) for receiving a spring-biased, strip-shaped magazine for fastening elements and having side recesses, and a pivotal lever(8) provided on the stud guide(3) and cooperating with the housing(1), the lever(8) being pivotable into a blocking position, in which the lever(8) projects into a clearance cross-sectional surface of the guide channel(4) upon displacement of the stud guide(3) toward the housing(1).

Explosive powder charge operating setting tool

A carrier strip (1) for explosive powder charge operated setting tools holds fastening elements or nails (2) in receiving bores (3) equidistantly spaced apart in the strip. Disks (6, 7) hold and guide the nails (2) in the receiving bores (3). Stops (8, 9) are formed in and extend radially inwardly from the inside diameter of the receiving bores (3). The stop (8) leading in the driving direction out of the receiving bores (3) can be overcome for driving the nail out of the bore.

Fastening element carrier strip for explosive powder charge operated

An explosive powder charge operated setting device includes an axially extending barrel with a guide magazine for a nail strip extending transversely of the barrel axis. A spring member within the magazine biases individual nails in the strip into the barrel bore. The magazine is aligned with a first aperture opening through the barrel into the bore. Diametrically opposite the first aperture is a second aperture so that a nail strip can be introduced through the second aperture, the barrel, and the first aperture, into the magazine. A stop is displaceably mounted on the barrel and can be held in a first position in the second aperture for holding nails in the strip in axial alignment with the barrel bore axis.

Explosive powder charge operated setting device

An explosive powder charge operated setting device includes a housing containing a barrel with a muzzle forming a muzzle bore at the outlet end of the barrel. Nails held in a carrier strip are fed from a magazine through a first or insertion aperture into the muzzle bore. Each nail has a head projecting outwardly from one side of the carrier strip and the nail heads have a smaller diameter than the diameter of the muzzle bore. The heads serve as stops limiting movement of the carrier strip out of the magazine. Due to the diameter difference between the nail heads and the muzzle bore, the nail heads in the stopped position do not align with the muzzle bore axis. When a nail is to be driven, it is displaced opposite to the feed direction out of the magazine into axial alignment with the muzzle bore.

Powder charge operated setting device

A carrier strip supports a plurality of nails for use in an explosive powder charge operated setting device. The nails are equidistantly spaced apart and held in bores in the strip. Guidance members, placed on the nail shanks, hold the nails within the strip bores. The heads of the nails project outwardly from one side of the carrier strip. The outside diameter of the nail heads is not greater than the inside diameter of the strip bores, so that the nails can be pushed through the bores out of the carrier strip into a receiving material.

Growing community of inventors

Montlingen, Switzerland

Norbert Pfister