Hilti Aktiengesellschaft

Hilti Aktiengessellschaft

Walter Odoni

Ulrich Schiestl

Ulrich Rosenbaum

Hans Gschwend

Harald Fielitz

Stefan Miescher

Hanspeter Schad

Edwin Schweizer

Rene Dandliker

Tilo Dittrich

Iwan Wolf

Mario Grazioli

Robert Spasov

Thomas Granacher

Reinhard Buhri

Bernard Favre-Bulle

Oliver Berchtold

Wilhelm Gerber

Richard Boesch

Andreas Klima

A auxiliary constructional component includes a base member (), a guide section () for a fastening element () and projecting from the base member (), and a feeler element () displaceably supported on the base member () for displacement along an attachment axis (A) defined by a through-opening () formed in the guide section (), having at least one, radially spaced from the through-opening (), placement surface () for a press-on feeler () of a setting tool, and projecting in an initial position of the feeler element () beyond a side of the base member () remote from the guide section ().

Auxiliary constructional component

A method for anchoring a fastening element to a flat steel member, in which the fastening element is driven into a blind hole previously drilled in the steel member is disclosed. Initially, in a first step of the method, a metal disk is adhesively bonded to the steel member. In a subsequent second step, a blind hole is drilled into the stack formed by the metal disk and the steel member and, in a subsequent third step, the fastening element is driven into the pre-drilled blind hole in the stack using a hand-held drive-in tool.

Method for anchoring a fastening element to a steel member

A hand-held drive-in power tool for driving-in fastening elements includes a drive-in ram () displaceably arranged in a guide (), a drive () for driving the drive-in ram () and having at least one driving spring member () for displacing the drive-in ram () and formed of a fiber-reinforced plastic material, and a device () for preloading the driving spring member ().

Hand-held drive-in power tool

A hand-held drive-in tool () has a trigger switch () for triggering a drive-in process by drive unit () that drives a drive-in ram (), a press-on feeler () which is arranged so as to be displaceable at a muzzle (), which can detect that the drive-in tool pressed against a workpiece, and which prevents the actuation of a drive-in process in its initial position () and enables actuation of its drive-in process in its switching position (), a component feeler () displaceably arranged at the muzzle () and capable of being actuated independently from the press-on feeler () and preventing actuation of a drive-in process in its initial position () and enabling the actuation of the drive-in process in its switching position (), the component feeler () detecting fitting of an auxiliary constructional component () to the muzzle (), with a drive-in process being initiated by the trigger switch () only when the component feeler () and the press-on feeler () are both in their respective switching positions ().

Hand-held fastener driving tool

A hand-held drive-in tool for driving fastening elements in a workpiece and including a guide (), a drive-in ram () displaceable in the guide () for driving a fastening element in, a drive-in unit () for driving the drive-in ram () and including at least one first drive spring () and at least one second drive spring () having respectively, opposite first and a second expansion directions (), and a tensioning device for preloading the drive-in ram () and the first drive spring ().

Hand-held drive-in tool

A combustion-engined setting tool for driving fastening elements such as, e.g., nails, bolts, pins in a constructional component includes a combustion chamber () for combusting an oxidant-fuel mixture, elements for closing the inlet opening () and the outlet opening () provided in the combustion chamber, ventilator () for generating a gas flow from the inlet opening through the combustion chamber and toward the outlet opening (), and a combustion-energy driven drive unit () for driving the ventilator.

Combustion-engined setting tool

A setting tool for driving fastening elements in a constructional component includes a setting mechanism located in the tool housing () and including a drive piston () for driving a fastening element () in the constructional component (), a reading device () for acquiring information containing in a coding () provided on a magazine strip () containing the fastening element (), and control device () communicating with the reading device () for adjusting setting parameters for a setting process dependent on data acquired by the reading device () upon reading out the coding ().

Setting tool with magazine with fastening elements and propellant holder for the setting tool

The present invention relates to a combustion-engined setting tool for driving fastening elements such as nails, bolts, pins and the like in a constructional component and including a fuel source (), a fuel conduit (), from the fuel source () to the combustion chamber (), at least one metering device () arranged in the fuel conduit () between the fuel source () and the combustion chamber (). The setting tool further includes a control device () for operating the metering device. The metering device () is formed for metering out fuel in form of a n-number of discrete separate portions, with a volume of separate portions being preset and remaining constant.

A pressure container with an outer container () and a constantly deformable or compressible inner container is arranged within the outer container (), whose container wall is constructed of a metallic foil. A fill material chamber () for fill material () is arranged in the inner container () and in the outer container (), a propellant chamber () is formed for propellant (), which are separated from one another in a fluid- and/or gas-tight manner. The pressure container is furthermore provided with a cover part () for sealing the containers (), on which a valve part () is arranged for dispensing fill material () from the fill material chamber () to the outside. For improving the pressure container it is proposed that a compensation body () be provided in the inner container () for the purpose of compensating volume variations in the fill material chamber ().

Pressure container

A combustion-engined setting tool for driving fastening elements in a constructional components includes at least one mechanically controlled valve ( ) arranged in a feeding conduit ( ) that connects a reservoir ( ) with an oxidation agent or fuel with the tool combustion chamber ( ), a switch element ( ) for time-delayed opening of the mechanically controlled valve ( ) upon being actuated, and at least one normally open, electronically controlled valve ( ) likewise arranged in the feeding conduit.

The present invention discloses a method and an apparatus which enables one to obtain definite non-modulo-2.pi.-dependent measurements wherein a method for the fiber-optic measurement of force, which is based upon the strain-induced birefringence of a single-mode light waveguide, provides a compensation method for the phase differences of two linear modes of the exiting light waves, which are caused by the force acting on the light waveguide and the consequent change in birefringence. In one embodiment of the method, a liquid crystal cell, the birefringence effect of which can be controlled electrically, is used as a compensation element. The maximum of an autocorrelation function, which occurs as an image, and the respective voltage at the liquid crystal cell, are evaluated as a measurement for the birefringence which is to be compensated for and, accordingly, for the effective force. In an alternate embodiment of the method, the two partial waves are directed transversely relative to the propagation direction of the wave fronts by an optical component with linearly space-dependent birefringence. The autocorrelation function can then be obtained as a spatial coordinate and can be plotted electronically by a line detector such as a line array. The location of the maximum of the autocorrelation function is, under certain defined conditions, a measurement for the birefringence which is caused in the light waveguide by mechanical tension from which the magnitude of the force, which acts on the force sensor, can be calculated.

Method and apparatus for absolute measurement of force by use of

A method and the device for fiber-optic measurement of the absolute value of the pretensioning in a highly loaded mechanical structural component part are based on the measurement of the phase displacement of a light wave caused by the strain-induced birefringence in a single-mode light waveguide 4 which is embedded between two metallic disks or washers 3a, 3b. Since the measurement results are ambiguous modulo-2.pi., serial or simultaneous measurement with two light wavelengths .lambda..sub.1, .lambda..sub.2 is used according to a first method variant of the invention. The quantity of 2.pi. periods can be unequivocally determined within a predetermined measuring range by means of comparing the two measurement results. The evaluation is preferably effected according to a quadrature or phase step method, known per se. According to second method variant, the light waveguide 4 is irradiated with polarized white light. The phase difference of the two linear modes due to the influence of force on the structural component part is compensated for in a compensation device 20. The control signal required for the compensation of the path difference is evaluated as a measurement for the force. The compensation method has the advantage that no monochromatic light sources are required.

Method and device for the measurement of force by a fiber optics system

A drilling and chiseling tool bit includes a tool bit head, an axially extending shank and an insertion end for insertion into a drilling or chiseling device. The shank extends between the tool bit head and the insertion end and is divided into individual axially aligned members. The individual shank members are held together by a retaining member which also interconnects the tool bit head and the insertion end. The tool bit head and insertion end are rotatable as a unit and are movable axially relative to one another. By dividing the shank axially, its individual members have a higher natural frequency and afford improved transmission of impact energy. As a result, preventing the excitation of natural vibrations in individual shank members, the vibration period is shorter compared to the impact transmission time period. Accordingly, the sound radiation from the tool bit is reduced.

Drilling and chiseling tool bit

In a motor-driven hand tool, such as a drill, an inert mass is rotatably supported in a housing and is connected to the housing by a spring encircling a driven shaft mounted in the housing. The driven shaft is arranged to rotate a drill bit secured to the shaft. If the driven shaft is prevented from rotating and the housing rotates relative to the shaft, the spring tightens about and grips the driven shaft exerting a braking torque on it. The braking torque reduces the reaction torque required of the tool operator and affords a more rapid release of an overload clutch acting on the driven shaft. The overload clutch is formed by a collar, a gear wheel, a cup spring, and an adjustable ring nut, all located on the driven shaft.

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Planken, Liechtenstein

Walter Odoni