COMBUSTION CHAMBER SYSTEM WITH OBSTACLES FOR USE WITHIN COMBUSTION-POWERED FASTENER-DRIVING TOOLS, AND COMBUSTION-POWERED FASTENER-DRIVING TOOLS HAVING COMBUSTION CHAMBER SYSTEM INCORPORATED THEREIN.

摘要

A combustion chamber system for use within a combustion-powered fastener-driving tool, and a combustion-powered fastener-driving tool having the combustion chamber system incorporated therein, is disclosed. The combustion chamber system comprises a dual combustion chamber system comprising a pre-combustion chamber and a final combustion chamber. The pre-combustion chamber is characterized a high aspect ratio and has different obstacles fixedly incorporated therein for selectively retarding or enhancing the rate of burn and the rate of speed of the flame front propagating through the pre-combustion chamber. In a similar manner, an obstacle having a predetermined solid geometrical configuration is disposed within the final combustion chamber at a position immediately disposed downstream of the port fluidically interconnecting the pre-combustion chamber to the final combustion chamber so as to effectively intercept the flame front and cause the same to diverge and split into multiple com ponents which flow radially outwardly with a desirably accelerated rate of speed and which traverse the entire diametrical extent of the final combustion chamber. In this manner, all regions of the unburned air-fuel mixture within the final combustion chamber are completely and rapidly ignited. The controlled combustion effectively acts upon the working piston with peak energy and power so as to drive and discharge fasteners out from the tool and into predetermined workpieces or substrates.