Abstract:
A combustion nailer configured for reducing intake of contaminated air during operation, includes a combustion engine (14) having a cylinder (20) with a piston (22) reciprocating between a prefiring position and a fully extended position, and at least one air port (54, 102) in the cylinder below the fully extended position. The at least one air port is provided with a venting check valve (60) configured so that the discharge volume from the cylinder out the at least one air port is greater than the inflow.
Abstract:
A combustion-powered fastener-driving tool includes a power source including a cylinder and a valve sleeve reciprocating relative to the cylinder between a closed position defining and closing a combustion chamber, and an open position allowing venting of the combustion chamber. A lockout device is associated with the power source and is configured for releasably restraining the valve sleeve in the closed position. A control system is connected to the power source, is operable in both a sequential firing mode and a repetitive firing mode, and is configured for activating the lockout device in a first format when in the sequential firing mode, and in a second format when in the repetitive firing mode.
Abstract:
A combustion nailer (10) includes a housing (12) substantially enclosing a combustion engine (14) having a cylinder head (42) , a control unit (62) associated with the housing (12) for controlling operation of the tool, at least one printed circuit board (66) electrically connected to the control unit (62) for maintaining tool operation, and at least one temperature sensor (60) mounted on the at least one printed circuit board (66) for monitoring tool temperature and for signaling sensed temperature to the control unit (62) .
Abstract:
A combustion-powered fastener-driving tool (10) includes a combustion-powered power source (14), a workpiece contact element (32) reciprocable relative to the power source (14) between a rest position and a firing position, a control system (67) operationally associated with the power source, a trigger (26) connected to the control system (67) providing operator interface with the control system (67). The control system (67) is configured so that an operator may select between a sequential firing mode in which the trigger (26) must be released between firings, and a repetitive cycle mode in which the trigger is continually depressed between firings. The trigger (26) is connected to the control system (67) so that at least one of the frequency and duration of pulling of the trigger (26) converts the operating mode from the sequential mode to the repetitive cycle mode.
Abstract:
A combustion-powered fastener-driving tool (10) includes a combustion-powered power source (14) including a cylinder head (42) and a combustion chamber (18) defined by the cylinder head, a valve sleeve (36) and an upper surface of a reciprocating piston (22), the valve sleeve reciprocable relative to the cylinder head between a rest position and a pre- firing position. The valve sleeve (36) has a range of positions between a first sealing position in which the combustion chamber (18) is closed, and said pre-firing position in which the valve sleeve is prevented from further movement. A lockout device (60, 90, 100, 110) is associated with the power source and has an actuated position configured for preventing the reciprocation of the valve sleeve beyond the first sealed position to open the combustion chamber, but permitting movement of the valve sleeve from the first sealed position to the pre-firing position until the piston returns to a piston pre-firing position post combustion.
Abstract:
A combustion tool for use with a fuel cell having a fuel metering valve is provided. The fuel metering valve of the fuel cell emits a prescribed volume of fuel from a fuel metering chamber through a valve stem. The tool includes a fuel cell chamber configured for receiving the fuel cell. A solenoid actuator is in operational relationship to the fuel cell chamber. The solenoid actuator is configured for pushing the fuel cell against a biasing force associated with the fuel cell. When the biasing force is overcome, the fuel cell emits fuel.
Abstract:
A combustion-powered fastener-driving tool (10) includes a combustion-powered power source (14), at least one fan (48) for associated with the power source (14), at least one temperature sensing device (60) in operational proximity to the power source (14) and a control system (67) operationally associated with the power source (14) and connected to the at least one fan (48) and at least one temperature sensing device (60) for adjusting the length of time for energizing the at least one cooling fan (48) as a function of power source temperature sensed by the at least one temperature sensing device (60).
Abstract:
A combustion-powered fastener-driving tool (10) includes a combustion powered power source (14) including a cylinder (20) defining a path for a reciprocating piston (22) and an attached driver blade (24), the piston (22) reciprocating between a pre-firing position achieved prior to combustion and a bottom out position. Upon combustion in the power source (14), the cylinder (20) includes at least one exhaust valve (52) configured for releasing combustion gases from the cylinder (20). The at least one exhaust valve (52) is dimensioned so that sufficient gas is released to reduce post-combustion pressure in the cylinder (20) to approximately one atmosphere in the time available for the piston (22) to travel past the at least one exhaust valve (52) and return to the at least one exhaust valve (52).
Abstract:
A fastener driving tool (10) includes a power source (14) including a reciprocating driver blade (24), a tool nose (30) associated with the power source for receiving the driver blade for driving fasteners (26) fed into the nose, a magazine (32) constructed and arranged to house a supply of the fasteners, a magazine feeder mechanism (50) associated with the magazine for sequentially feeding fasteners into the nose, the feeder mechanism including a reciprocating feed piston (58), and an electromechanical retention device (110) that is operationally associated with the feeder mechanism (50) and configured for retaining the feed piston (58) in a retracted position until the driver blade is positioned to allow fastener advancement into the nose.
Abstract:
A combustion nailer includes a tool housing, and a combustion engine substantially located within the housing and including a valve sleeve reciprocating relative to a cylinder head for cyclically opening and closing a combustion chamber. A control system is associated with the housing and is connected to the combustion engine for providing for a designated open time for the combustion chamber after a combustion event and before a subsequent combustion can occur.