Hilti Aktiengesellschaft

Hiltie Aktiengeselschaft

Kaveh Towfighi

Iwan Wolf

Joachim Thieleke

Ulrich Schiestl

Hans Gschwend

Ulrich Rosenbaum

Harald Fielitz

Roland Hasler

Wolfgang Saxler

Lothar Voelker

A pneumatically driven setting tool for driving in fastening elements, includes a chamber () forming a storage chamber () for storing the pressure medium produced by the compression device () and an expansion chamber () adjoining the drive-in piston (), which is displaceable in a guide (), at a side of the drive-in piston () remote from the piston stem (), communicating with the storage chamber (), and having an opening () connecting the expansion chamber () with the drive-in piston (), at least one check valve () arranged between the compression device () and the chamber (), and a piston retaining device () for retaining the drive-in piston () in its initial position () in which the chamber () is sealed against the guide ().

Pneumatically driven setting tool

A combustion-engined setting tool for driving fasting elements such as nails, bolts, pins in an object, includes a combustion chamber (), a fuel source (), a fuel conduit () connecting the fuel source () with combustion chamber () for feeding fuel thereinto, and at least one metering device () for metering a predetermined amount of fuel for effecting a setting process and having at least one variable volume metering chamber (), and a displaceable piston body () for a pulsed ejection of fuel from the metering chamber ().

Combustion-engined setting tool

A fuel for internal combustion-powered tools, especially for setting tools for fastening elements and based on a liquefied, combustible gas or gas mixture with a vapor pressure of 2 to 15 bar absolute at 20&#xb0; C., and at least one combustible compound, which is soluble in the gas or gas mixture and is a liquid at 20&#xb0; C. and atmospheric pressure, and which is used as an agent for improving the combustion behavior.

Fuel for internal combustion-powered tools

A pressurized container ( ) with crimped surfaces ( ) at contact regions ( ) on the two surfaces ( ) are sealed gas-tight by crimping and with a gas-tight sealing compound ( ) as an intermediate layer between the two surfaces ( - - ). The gas-tight sealing compound ( ) is applied between the surfaces ( - - ) of the pressurized can ( ) before the crimping.

Pressurized container and method of filling it

A propellant gas is described for tools, operated by combustion power, especially for setting equipment for fastening elements, on the basis of combustible gases containing a mixture of (A) 40% to 70% by weight of dimethyl ether, nitrous oxide and/or nitromethane, (B) 8% to 20% by weight of propylene, methyl acetylene, propane and/or propadiene and (C) 20% to 45% by weight of isobutane and/or n-butane.

Propellant gas for tools operated by combustion power

A method of driving a piston ( ) of an internal combustion-engined tool having a combustion chamber which is separated by a separation plate ( ) with a plurality of through-opening ( ) into a fore-chamber section ( ) and a main chamber section ( ) adjoining the piston ( ), including producing gas jets having a predetermined energy, which enter the main chamber section ( ) through the through-openings ( ) of the separation plate ( ), combusting, in the fore-chamber section ( ), at least approximately a volume of a combustible gas mixture corresponding to the pre-determined energy of the gas jets, and combusting, in the main chamber section, a combustible gas mixture for creating a pressure necessary for displacing the piston.

Internal combustion-engined tool and method of driving a piston of the same

A method of driving a piston ( of a portable, internal combustion, engine tool by combusting a combustible gas mixture in a combustion chamber ( ) having a combustion chamber wall ( ) located opposite the piston ( ), the method including dividing the combustion chamber ( ) in at least two chamber sections ( ) by providing, between the combustion chamber wall ( ) and the piston ( ), a separation plate ( ) having a plurality of through-openings ( ) and separately adjusting the combustible gas mixture in each chamber section ( ).

Portable, internal combustion-engined tool and method of driving its piston

A portable, internal combustion-engined tool includes a combustion chamber ( ), a piston ( ) adjoining the combustion chamber ( ), with a pressure build-up in the combustion chamber ( ) providing for movement of the piston ( ) from its initial position, in which the piston adjoins the combustion chamber ( ), away from the combustion chamber ( ). A brake device ( ) retains the piston ( ) substantially in its initial position during build-up of pressure in the combustion chamber ( ), with a braking force applied to piston ( ) being changeable for adjusting the amount of energy generated in the combustion chamber and transmittable to the piston ( ).

Combustion-engined tool having a braking device for its piston

A device for creating a laminar flame front in an internal combustion-engined tool having a combustion chamber ( ) with two walls ( ) extending parallel to each other, the device including a cage ( ) located between the two walls ( ) and having a plurality of openings ( ) formed in an otherwise solid circumferential wall of the cage ( ), and an ignition element ( ) located in a cage interior for igniting a combustible gas mixture located between the two walls ( ).

Device for creating a laminar flame front

An internal combustion-engined tool including a piston and a combustion chamber ( ) for generating power for driving the piston and having a bottom ( ) adapted to receive the piston plate ( ), an end wall ( ) located opposite the bottom ( ), a movable wall ( ) located between the bottom ( ) and the end wall ( ) and provided with an opening element ( ), a movable separation wall ( ) located between the bottom ( ) and the movable wall ( ) and provided with a plurality of openings ( ), and an arrangement ( ) for injecting fuel gas into a space formed between the end wall and the movable wall upon the movable wall ( ) and the separation wall ( ) being displaceable in a direction of the bottom ( ) upon collapsing of the combustion chamber ( ).

Portable internal combustion-engined tool and method of forming a gas mixture in the tool combustion chamber

A portable, combustion-engined tool including a collapsible combustion chamber ( ) having a movable separation plate ( ) for dividing the combustion chamber ( ), in an expanded position of the combustion chamber, in a forechamber section ( ) and at least one further chamber section ( ), a movable combustion chamber wall ( ) arranged parallel to the separation plate ( ) for limiting, together with the separation plate ( ), the forechamber section, an ignition device ( ) located in the forechamber section ( ), and a collapse control device ( ) for controlling movement of the separation plate ( ) and the movable wall ( ) after the combustion of the gas mixture in the combustion chamber.

Combustion-engined tool

A portable, combustion-engined tool including a combustion chamber ( ) in which a fuel gas in combusted upon ignition for building up pressure in the combustion chamber for driving the tool piston ( ), an ignition device ( ) for igniting the fuel gas in the combustion chamber ( ), and gas drain means ( ) provided in the combustion chamber ( ) for controlling a pressure build-up therein.

Combustion-engined tool having a combustion chamber with a controllable pressure build-up

A metering head for delivering a liquified fuel gas in different combustion chamber sections of a tool and including an inlet ( ), at least two outlets ( ), and at least one metering valve ( ) connecting the inlet ( ) with the at least two outlets ( ).

Metering head

A combustion-engined tool including two opposite combustion chamber walls ( ), and an ignition device ( ) arranged between the two opposite combustion chamber walls for igniting a fuel gas mixture occupying space between the two walls, and an element located between the ignition device ( ) and openings ( ) formed in one of the two walls ( ) for localized swirling a laminary expanding flame front formed upon ignition of the fuel gas mixture with the ignition device ( ).

Growing community of inventors

Sigmarszell, Germany

Kaveh Towfighi