Pyrotechnic driving device
AssigneeHilti Aktiengesellschaft
InventorMatthias Blessing
Life of this patent
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Abstract
A driving device is provided comprising a hand-held housing with a piston member arranged therein for transmitting energy to a securing element to be driven in; an interchangeable propellant charge and a combustion chamber arranged between the propellant charge and the piston member, the combustion chamber extending around a central axis (A); and an actuator, by which the energy transmitted by the propellant charge to the piston member can be variably adjusted. The driving device also includes a blow-off channel connected to the combustion chamber that can be exposed by a movable slide of the actuator and the movable slide comprises a body which completely encircles the central axis (A).
Claims21
A driving-in device, comprising:
- a hand-held housing with a piston element therein for transmitting an amount of energy to a fastening element to be driven in;
- a replaceable propelling charge;
- a combustion chamber provided between the replaceable propelling charge and the piston element, the combustion chamber extending about a central axis;
- a piston guide located in front of the combustion chamber, wherein the piston guide is rotatable relative to the hand-held housing about the central axis axis;
- a blow-off channel connected to the combustion chamber;
- and, an actuator that is adjustable to modify the amount of energy to be transmitted to the piston element by the replaceable propelling charge, the actuator comprising a movable slide comprising a body which completely encircles the central axis, wherein the moveable slide is supported in a forced guide, and the moveable slide is rotated about the central axis to adjust a cross section of the blow-off channel, and rotation of the moveable slide about the central axis moves the moveable slide in a direction of the central axis and releases gas from the combustion chamber into the blow-off channel, and the piston guide and the moveable slide are axially moveable relative to each other and unrotatable relative to each other.
Dependencies are inferred from the claim text.