Combustion chamber valve and fuel system for driven fastener hand tool
AssigneePower Tech Staple and Nail, Inc.
InventorsRAYMOND WONG, SHIH-YI CHEN, CHIN-CHUAN CHEN
Life of this patent
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Abstract
A novel combustion chamber valve and fuel system for driven fastener hand tool is disclosed having a fuel pump disposed parallel to the combustion and piston chambers. Pressure applied a safety at the nose of the tool is activates the fuel pump in a common direction. Pressure applied on a trigger activates the valve system prior to firing in a common direction. The valve system employs a central shaft coupling three valves, an inlet valve using a novel wedged circumferential edge seal, a control valve using a novel edge circumferential seal with a ventilated support, and a charging exaust valve using a face seal.
Claims17
An apparatus, comprising:
- a combustion chamber;
- a central shaft having an inlet valve for an inlet from a fuel pump, a control valve for a separating two portions of the combustion chamber, and a charging exaust valve for allowing excess fuel and air to exhaust during charging disposed within the combustion chamber, the inlet valve, the control valve, and the charging exhaust valve are disposed in a closed position and an open position together by movement of the central shaft substantially away from a delivery point of the tool;
- and
- a trigger activated by motion away from the delivery point of the tool and thereby causing the movement of the central shaft and subsequent firing the combustion chamber.
An apparatus, comprising:
- a combustion chamber comprising a pair of parallel cylindrical sections with one of the pair of cylindrical sections having a piston and driver disposed therein for driving a fastener at the delivery point proximate a first end of the cylindrical section and the pair of parallel cylindrical sections are coupled proximate a second end distal the delivery point;
- and
- a fuel pump disposed parallel to the parallel cylindrical sections of the combustion chamber;
- wherein charging of the combustion chamber is activated by a safety proximate the delivery point pressed against a workpiece surface such that movement of the safety away from the delivery point activates a fuel pump by movement substantially away from the delivery point to cause fuel and air to be delivered through the inlet valve.
Dependencies are inferred from the claim text.