Abstract: A combustion nailer includes a tool housing, a combustion source disposed at least partially in the housing and including a valve sleeve reciprocating relative to a cylinder head along a tool axis between a rest position and a pre-firing position, a fuel cell chamber in the housing in operational proximity to the combustion source and dimensioned for accommodating a fuel cell, at least one pivot point associated with the fuel cell chamber transverse to the tool axis for facilitating movement of the fuel cell between a non-activated position and an activated position, and at least one actuator pivotable about the pivot point and engaging the valve sleeve at a point closer to the tool axis than to the fuel cell chamber such that movement of the valve sleeve from the rest position to the pre-firing position causes movement of the fuel cell from the non-activated position to the activated position.

Abstract: A fuel cell includes a spark initiator configured to initiate spark events, and a fuel level monitoring system configured for monitoring the fuel level in the fuel cell and indicating the monitored fuel level to a user. Included in the fuel level monitoring system is a programmable control unit configured to control the spark initiator and to count the spark events initiated by the spark initiator, to compare a number of spark events with at least two predetermined ranges of spark events, and to determine the fuel level in the fuel cell based on the determinations. An indicator controlled by the programmable control unit is supplied for providing the user with an indication of the fuel level in the fuel cell.

Abstract: A combustion nailer includes a tool housing, a combustion source disposed at least partially in the housing and including a valve sleeve reciprocating relative to a cylinder head along a tool axis between a rest position and a pre-firing position, a fuel cell chamber in the housing in operational proximity to the combustion source and dimensioned for accommodating a fuel cell, at least one pivot point associated with the fuel cell chamber transverse to the tool axis for facilitating movement of the fuel cell between a non-activated position and an activated position, and at least one actuator pivotable about the pivot point and engaging the valve sleeve at a point closer to the tool axis than to the fuel cell chamber such that movement of the valve sleeve from the rest position to the pre-firing position causes movement of the fuel cell from the non-activated position to the activated position.