Abstract: Gas-operated fixing tool including a working chamber, a piston mounted slideably in the working chamber and comprising a driving rod of which a first longitudinal end is configured to drive a fixing element and of which a second longitudinal end is connected to a head which separates the working chamber into a first portion and into a second portion which is traversed by the rod, and at least one combustion chamber in which a mixture of air and fuel is intended to be burnt in order that combustion gases generate a rise in pressure that causes a movement of the piston in the working chamber, wherein the at least one combustion chamber is in fluid communication with the second portion in such a way that the rise in pressure causes the movement and the return of the piston into a rest position ready for firing a fixing element.

Abstract: A fastener assembly includes an elongated fastener body with a head end part. A propelling member supported on the fastener body, wherein the propelling member has a lengthened shape, wherein a portion of the lengthened shape extends around the head end part of the fastener body. A method of propelling the fastener assembly is also provided.

Abstract: Gas-operated fixing tool including a working chamber, a piston mounted slideably in the working chamber and comprising a driving rod of which a first longitudinal end is configured to drive a fixing element and of which a second longitudinal end is connected to a head which separates the working chamber into a first portion and into a second portion which is traversed by the rod, and at least one combustion chamber in which a mixture of air and fuel is intended to be burnt in order that combustion gases generate a rise in pressure that causes a movement of the piston in the working chamber, wherein the at least one combustion chamber is in fluid communication with the second portion in such a way that the rise in pressure causes the movement and the return of the piston into a rest position ready for firing a fixing element.

Abstract: The present disclosure concerns improvements for a gas-powered fixing tool, and particularly a combustion chamber or precombustion chamber for a gas-powered fixing tool, a working chamber for a gas-powered fixing tool, a fuel gas injection device for a gas-powered fixing tool and a gas-powered fixing tool including one or more of these elements.

Abstract: Various embodiments of the present disclosure provide a gas-powered fixing tool including a working chamber, a piston slidably mounted in the working chamber, a precombustion chamber in which gas combustion is to be initiated, and a combustion chamber between the precombustion chamber and the working chamber. The precombustion and combustion chambers are separated by a flap that is movable between a position in which the precombustion and combustion chambers are in fluid communication and a position these chambers are not in fluid communication. The tool also comprises a combusted gas evacuation valve. The tool also comprises means for fluidic communication between the precombustion and combustion chambers. The means are configured to be activated after a start of displacement of the piston from a rest position to a working position, and before actuation of the valve for evacuation of combusted gas to the outside of the precombustion and/or combustion chamber.

Abstract: A gas fastening tool comprising an internal combustion engine including one combustion chamber, fuel injection means to inject fuel into the chamber and air injection means to inject air into the chamber, firing means for an air-fuel mixture within the chamber, reception means to receive a fastening element, one cylinder communicating with the chamber, forming together a combustion gas propagation pathway and wherein a piston is slidingly mounted so as to drive the fastening element, such tool being characterized in that it comprises a duct provided with a downstream input mouth and an upstream output mouth on the gas pathway, the piston stroke in the cylinder extending between the two duct mouths.

Abstract: According to the invention, the adapter is arranged to be mounted in the tool, to be connected to a fuel cartridge and to receive fuel and communicate with a combustion chamber so as to inject a mixture of external air and fuel therein.

Abstract: A fastener assembly includes an elongated fastener body with a head end part. A propelling member supported on the fastener body, wherein the propelling member has a lengthened shape, wherein a portion of the lengthened shape extends around the head end part of the fastener body. A method of propelling the fastener assembly is also provided.

Abstract: An indirect firing fastening tool, comprising driving and propelling means for a fastener to be set into a support, such driving means being rotationally mobile and configured to directly cooperate with the fastener or with a propelling member supported by the latter, so that a rotation of the driving means directly causes the translational driving and the propulsion of the fastener.

Abstract: The present disclosure concerns improvements for a gas-powered fixing tool, and particularly a combustion chamber or precombustion chamber for a gas-powered fixing tool, a working chamber for a gas-powered fixing tool, a fuel gas injection device for a gas-powered fixing tool and a gas-powered fixing tool including one or more of these elements.

Abstract: Various embodiments of the present disclosure provide a gas-powered fixing tool including a working chamber, a piston slidably mounted in the working chamber, a precombustion chamber in which gas combustion is to be initiated, and a combustion chamber between the precombustion chamber and the working chamber. The precombustion and combustion chambers are separated by a flap that is movable between a position in which the precombustion and combustion chambers are in fluid communication and a position these chambers are not in fluid communication. The tool also comprises a combusted gas evacuation valve. The tool also comprises means for fluidic communication between the precombustion and combustion chambers. The means are configured to be activated after a start of displacement of the piston from a rest position to a working position, and before actuation of the valve for evacuation of combusted gas to the outside of the precombustion and/or combustion chamber.

Abstract: An indirect firing fastening tool, comprising driving and propelling means for a fastener to be set into a support, such driving means being rotationally mobile and configured to directly cooperate with the fastener or with a propelling member supported by the latter, so that a rotation of the driving means directly causes the translational driving and the propulsion of the fastener.

Abstract: An assembly of a fuel cell for an electroportable device and of a connection adapter for connecting the fuel cell and a fuel reservoir, the adapter being arranged for receiving a member for supplying the cell and an ejection nosepiece of the reservoir, the adapter comprising a valve arranged for being actuated by the ejection nosepiece of the reservoir and switched from a plugging condition, before connection, to a fuel transmission condition, after connection. Thanks to the invention, the fuel cell is permanently maintained under fuel supply.

Abstract: A gas fastening tool comprising an internal combustion engine including one combustion chamber, fuel injection means to inject fuel into the chamber and air injection means to inject air into the chamber, firing means for an air-fuel mixture within the chamber, reception means to receive a fastening element, one cylinder communicating with the chamber, forming together a combustion gas propagation pathway and wherein a piston is slidingly mounted so as to drive the fastening element, such tool being characterized in that it comprises a duct provided with a downstream input mouth and an upstream output mouth on the gas pathway, the piston stroke in the cylinder extending between the two duct mouths.

Abstract: A gas fastening device comprising an internal combustion engine with a combustion chamber arranged between, on the one side, an upstream compression piston and, on the other side, a downstream propulsion piston, intake means to inject into the chamber a mixture of air and a fuel, means being provided to fire a mixture injected into the chamber, both pistons being mounted mobile into translation for the intake of a mixture into the chamber and, after firing a mixture, for the driving of the fastening element by the downstream propulsion piston.

Abstract: According to the invention, the adapter is arranged to be mounted in the tool, to be connected to a fuel cartridge and to receive fuel and communicate with a combustion chamber so as to inject a mixture of external air and fuel therein.

Abstract: The fastening apparatus for fastening elements includes a combustion chamber, a housing for a gas cartridge, means for injecting gas from a cartridge into the combustion chamber and a management module. An engine thermistor is provided to be subjected to the temperature of the chamber, as well as a second cartridge thermistor intended to be subjected to the temperature of the gas cartridge disposed in the cartridge housing. Both thermistors are mounted for transmitting their temperature information to the management module. The management module is operable for managing temperature information and determining the opening time of the injection means.

Abstract: A gas setting tool, wasting a limited amount of fuel. The tool comprises i) an internal combustion engine, with a device for injecting fuel in the chamber of the engine, comprising a check valve and an injection piston, the injection piston extending beyond the check valve, and iii) a sealing joint mounted on the injection piston of the check valve. The injection piston comprises an internal bore opened on the exterior and the check valve and its injection piston are arranged so that, in an opening position, the fuel in a container is able, outside the check valve, to only flow through the internal bore of the injection piston. Thanks to this invention, fuel waste is reduced to the best.

Abstract: An assembly of a fuel cell for an electroportable device and of a connection adapter for connecting the fuel cell and a fuel reservoir, the adapter being arranged for receiving a member for supplying the cell and an ejection nosepiece of the reservoir, the adapter comprising a valve arranged for being actuated by the ejection nosepiece of the reservoir and switched from a plugging condition, before connection, to a fuel transmission condition, after connection. Thanks to the invention, the fuel cell is permanently maintained under fuel supply.

Abstract: The fastening tool comprises a system for controlling the intake of a fuel into a combustion chamber, a source of fuel, a switch for igniting said fuel in said combustion chamber. A valve, normally closed, comprises an intake port arranged for communicating with said source of fuel and an exhaust port arranged for communicating with said combustion chamber. The valve is a piezoelectric injector arranged for pressurizing the fuel at the outlet thereof and thereby micronizing it. This invention applies well to nailing machines.