US 8,771,799 B2 · Liquid delivery system

Abstract

A system for spray delivery of liquids comprising a motor axially coupled to one or more pistons through a wobble plate coupling. Each piston feeds an input port of a swirl chamber spray nozzle. Each piston may separately pulse the swirl chamber using a different injection point. In one embodiment, the spray nozzle, swirl chamber, feed channels and cylinder heads for the cylinders may be formed as a single integrated casting. In one embodiment, the sprayer may include an intermediate plate rotatably mounted on the wobble plate. The sprayer may include a piston cap with a flat contact with the wobble plate/intermediate plate and a spherical interface with the piston. In a further embodiment, the system may be configured for handheld application of liquids and may comprise a tank for holding the liquid, a power source and control actuator together with the spray pump and nozzle in a hand operable package.

Claims12

Dependent claims

A method for applying a viscous fluid to a surface at a prescribed distance, said method comprising steps:

providing a pulsating pump having a pump cycle;
said pulsating pump repeating said pump cycle at a pulse repetition rate;
said pulsating pump delivering said viscous fluid to a swirl chamber nozzle at a varying flow rate during said pump cycle;
and
spraying said viscous fluid on said surface using said pulsating pump to deliver said viscous fluid as a sequence of pulses through said swirl chamber nozzle;
wherein said varying flow rate comprises at least a first non-zero flow rate and a second non-zero flow rate greater than said first non-zero flow rate;
wherein said pulse repetition rate is at least 3000 pulses per minute and is sufficient for fluid at said second non-zero flow rate from a given pulse to overtake fluid at said first non-zero flow rate from a previous pulse before reaching said prescribed distance from said swirl chamber nozzle;
and
wherein said prescribed distance is 30 centimeters.

6 more elements

Dependencies are inferred from the claim text.

Liquid delivery system

Life of this patent

Liquid delivery system

Life of this patent

Abstract

Claims12