Variable ignition delay for combustion nailer

Details Variable ignition delay for combustion nailer Variable ignition delay for combustion nailer

2006-11-17

2011-12-06

Durand, Paul (Department: 3721)

Elongated-member-driving apparatus

With control means responsive to sensed condition

C227S010000

Reexamination Certificate

active

08070031

ABSTRACT:
A combustion-powered fastener-driving tool includes a tool housing, a power source associated with the housing and including a cylinder head, a cylinder and a piston reciprocating in the cylinder, a valve sleeve reciprocating relative to the cylinder, a chamber switch and a trigger switch; the cylinder head, the valve sleeve, the cylinder and the piston combining to define a combustion chamber, the closing of both switches required for initiating an ignition of the power source for driving piston down cylinder. A fan is disposed in the combustion chamber, and a control system includes a control program associated with the housing, connected to the power source, the chamber switch and the trigger switch, and configured for providing a designated ignition delay period after fuel is injected into the combustion chamber and when the chamber switch is closed, the delay period being variable as a function of monitored tool parameters.

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