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US 4,565,322 AGranted
Liquid spray apparatus for dispensing liquid droplets of constant droplet size
AssigneeCiba-Geigy Corporation
InventorAlfred Graber
Life of this patent
Estimating the term…
Abstract
A liquid spray apparatus comprises a pneumatic drive and automatic speed regulating device. To this end, a vane wheel which can be acted upon by an air stream is mounted axially displaceably on a shaft. The vane wheel is in contact with regulating elements which are moved radially outwardly at increasing speed by the influence of centrifugal forces. In doing so the regulating elements act upon the vane wheel in a manner such that it is displaced at least partially out of the range of the air stream.
Claims10
A liquid spray apparatus for dispensing liquid droplets of constant droplet size comprising a liquid container;
- a liquid distributing device in fluid communication with said liquid container and comprising a shaft, a spray head, a spray plate contained in said spray head and mounted on said saft, drive means for said spray plate, said drive means comprising a vane wheel mounted axially displaceably on said shaft adapted for being acted upon by a gas stream, said mounting of both said spray plate and said vane wheel on said shaft resulting in common rotation of the two, and means for regulating the speed of said spray plate comprising regulating elements being movable radially outwardly at increasing speed of said vane wheel and under the influence of centrifugal forces, said vane wheel being coupled to said regulating elements and being displaced at least partially out of the range of said gas stream when said regulating elements move radially outwardly;
- a pressurized gas source for generating said gas stream and a nozzle directing said gas stream on to said vane wheel.
Dependencies are inferred from the claim text.