Patent ID: 7963459
Filing Date: 2011-06-21
Classification: B05B,C02F

Abstract:
1. A variable orifice nozzle for use with a pressurized liquid, comprising: a nozzle body having an inlet into which the pressurized liquid is admitted, and an outlet opening through which the pressurized liquid exits; a threaded shank; a stem that is movable with respect to said outlet opening of said nozzle body to form an orifice, said stem connected to said threaded shank; a spring biasing said stem toward a position closing the orifice, and said spring having a force counteracted by a pressure of the liquid during dynamic operation of the nozzle to change an orifice area to maintain a desired pressure of the liquid applied to the inlet of said nozzle body; a member threadably engaged with said threaded shank, wherein relative rotation between said threaded shank and said member is adapted for changing a compression force of said spring; and a drive mechanism for applying a desired compression force to said spring.