Combustion-engined setting tool

Internal-combustion engines – Free piston – Single chamber; one piston

Reexamination Certificate

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Details

C123S0460SC, C123S0460SC, C227S009000, C227S010000, C173S209000

Reexamination Certificate

active

11591045

ABSTRACT:
A combustion-engined setting tool for driving fastening elements in a constructional component end including a combustion chamber (13) for combusting a gas mixture, an inlet/outlet device (40) for opening the combustion chamber (13) in its first position and for closing the combustion chamber (13) in its second position and having a valve element for reversibly displacing the inlet/outlet device (40) between its first and second positions, a locking element (37) for locking the valve element of the inlet/outlet device (40) in the second position of the device, a trigger (30) for actuating the locking element (37), a release switch (22) for triggering ignition in the combustion chamber (13), an electronic control unit (20) for controlling start of the ignition in the combustion chamber (13), and an initialization switch connected with the control unit (20), the control unit (20) initiating the ignition in the combustion chamber (13) when a time period between switching-on of the initialization switch and switching-on of the release switch (22), which is also connected with the control unit, does not exceed a predetermined set time period.

REFERENCES:
patent: 3964659 (1976-06-01), Eiben et al.
patent: 4074844 (1978-02-01), Hodil, Jr.
patent: 4298072 (1981-11-01), Baker et al.
patent: 4679719 (1987-07-01), Kramer
patent: 5909836 (1999-06-01), Shkolnikov et al.
patent: 6532917 (2003-03-01), Thieleke et al.
patent: 6666366 (2003-12-01), Rosenbaum et al.
patent: 7168603 (2007-01-01), Lund et al.
patent: 1512495 (2005-03-01), None

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