A generate assembly and a lighting element for a pneumatic tool includes a body
having a channel and a first passage defined therein. The first passage has a first
end communicating with an exhauster of the pneumatic tool and a second end extending
to communicate with the channel and defining an opening in an inner periphery of
the channel. A second passage defined in the body for exhausting exhaust gas. A
generator is mounted in the body for generating electric power to the lighting
element. The generator has a turbine extending into the channel and eccentrically
corresponding to the opening in the inner periphery of the channel such that exhaust
gas, from the pneumatic tool, drive the turbine due to the eccentric relation between
the turbine and the opening. A sleeve is securely mounted around the body for airtightly
closing the channel in the body.
