In-can fuel cell metering valve with a reduced number of seals

摘要

A fuel cell (10) for use with a combustion tool for delivery of a predetermined amount of fuel with each stem actuation is disclosed. The fuel cell (10) has a housing defining an open end enclosed by a closure (16). A main valve stem (26) has an outlet (28) which moves relative to the housing between a closed position wherein the stem (26) is extended, and an open position wherein the stem (26) is retracted. A fuel metering valve (25) is located within the housing and includes a fuel metering chamber (38) in close proximity to the closure (16). The fuel metering chamber (38) is configured so that when the stem (26) is in the open position, only a measured amount of fuel is dispensed through the outlet (28). In a preferred embodiment, the fuel cell housing includes a separate fuel container (22), and the fuel metering valve (25) includes a valve body (34) with a second end (64) opposite the fuel metering chamber (38) located within the container.