Abstract: A fuel injection nozzle arrangement comprising a fuel injection nozzle having a fuel injection orifice, and vibratory means such as a piezoelectric crystal for vibrating the nozzle to cause atomization of fuel ejected from the nozzle through the orifice, the nozzle having a fuel-retaining valve at the fuel inlet side of the orifice arranged to normally close the orifice and thus prevent the injection of fuel but to be opened when the vibratory means is energised to permit injection of fuel, and the nozzle having a gas-excluding valve at the fuel outlet side of the orifice arranged to normally close the orifice and thus prevent the entry of gases into the nozzle through the orifice but to open under fuel injection pressure to permit the injection of fuel.

Abstract: A fluid mixing apparatus for association with an air atomizing spray gun is disclosed. The fluid mixing apparatus comprises a fluid manifold adapted for attachment to the handle of an air atomizing spray gun and includes static mixer means interconnecting the fluid manifold with the spray fluid inlet of the air atomizing spray gun. The fluid manifold comprises a fluid passage means interconnecting a plurality of inlet ports and communicating with an exit port which is connected to the static mixture means. The individual components of a multiple component sprayable fluid are separately introduced into the manifold through individual ones of the manifold inlet passages and are flowed through the manifold passage to be intimately intermixed by the static mixer means prior to being introduced into the sprayable fluid inlet port of the air atomizing spray gun.