Patent ID: 7510105

Claim:
A combustion-powered fastener-driving tool, comprising: a housing having a portion defining a main chamber, and a distinct handle portion; a combustion-powered power source located in said main chamber; a workpiece contact element reciprocable relative to said power source between a rest position and a firing position; a control system operationally associated with said power source; a trigger associated with said handle portion and connected to said control system providing operator interface with said control system; said control system being configured so that an operator may select between a sequential firing mode in which the trigger must be released between firings, and a repetitive cycle mode in which the trigger is continually depressed between firings; a user accessible switch electrically connected to said control system for manually changing between said sequential firing and said repetitive cycle modes, wherein said switch is mounted on said housing portion defining said main chamber: and a combustion chamber control device configured for delaying the opening of a valve sleeve connected to said workpiece contact element from said firing position until a piston in said power source returns to a pre-firing position, and at least one temperature sensing device connected to said control system which adjusts a period of energization of said combustion chamber control device as a function of a temperature of the power source.