초록 ▼

A portable, internal combustion-engined setting tool for driving in fastening elements and including a drive piston (8), 34 a combustion chamber 1 having an inlet/outlet valve 34, located adjacent to the piston (8) and in which a fuel gas mixture is ignited for generating pressure for driving the pi

A portable, internal combustion-engined setting tool for driving in fastening elements and including a drive piston (8), 34 a combustion chamber 1 having an inlet/outlet valve 34, located adjacent to the piston (8) and in which a fuel gas mixture is ignited for generating pressure for driving the piston (8), a locking/unlocking device (54) for closing and opening the outlet valve (34), respectively, a sensing device (55) for retaining the locking/unlocking device (54) in a locking position and having a member that is pressed against a circumference of the piston rod (10) for retaining the locking/unlocking device (54) in the locking position, and an element for positioning the member relative to the piston rod 10, when the piston (8) is not in its initial position, so that the member does not apply to the locking/unlocking device (54) a force acting in a locking direction of the locking/unlocking device.

대표청구항 ▼

1. A portable, internal combustion-engined, setting tool for driving in fastening elements, the setting tool comprising a drive piston (8) having a piston rod (10) for driving a fastening element; a combustion chamber (1) located adjacent to the piston (8) and in which a fuel gas mixture is ignited

1. A portable, internal combustion-engined, setting tool for driving in fastening elements, the setting tool comprising a drive piston (8) having a piston rod (10) for driving a fastening element; a combustion chamber (1) located adjacent to the piston (8) and in which a fuel gas mixture is ignited for generating pressure for driving the piston (8); at least one outlet valve (34) provided in the combustion chamber (1) for removing flue gases; a locking/unlocking device (54) for closing and opening the at least one outlet valve (34), respectively; sensing means (55) for retaining the locking/unlocking device (54) in a locking position and having a member that is pressed against a circumference of the piston rod (10) for retaining the locking/unlocking device (54) in the locking position and that is displaced, after the piston (8) reaches an initial position thereof, into a path of the piston rod (10) to enable displacement of the locking/unlocking device (54) from the locking position into an unlocking position; and means for positioning the member relative to the piston rod (10) when the piston (8) is not in the initial position thereof, so that the member does not apply to the locking/unlocking device (54) a force acting in a locking direction of the locking/unlocking device (54). 2. A setting tool according to claim 1, wherein the member is positioned on a side of the piston rod (10) when viewed in a press-on direction. 3. A setting tool according to claim 2, further comprising preload means (72) for biasing the member toward the piston road (10). 4. A setting tool according to claim 1, wherein the locking/unlocking device comprises a locking lever, and wherein the sensing means is pivotally supported on the locking lever. 5. A setting tool according to claim 1, wherein the positioning means comprises an actuation element for displacing the member.