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US 4,025,046 AGranted
Liquid atomisers
AssigneeSociete Technique de Pulverisation
InventorMichel Boris
Life of this patent
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Abstract
An atomizer comprises a cylinder defining a pump chamber and containing a piston. The chamber communicates with an atomizer nozzle by a valve comprising a valve member which is opened at a predetermined liquid pressure during operation of the piston to pressurize the liquid in the pump chamber. Liquid is fed into the pump chamber through a conduit which projects upwardly into the cylinder. A sleeve rigid with the valve member or the piston engages the conduit during operation of the piston to prevent communication between the conduit and the pump chamber.
Claims12
In an atomizer,
- cylinder means,
- conduit means extending upwardly within the cylinder means to define therewith a pump chamber, said conduit means being capable of selective communication with the pump chamber,
- inlet means communicating with the conduit means,
- an atomizer nozzle;
- passage means providing communication between the pump chamber and the nozzle,
- a first piston member slidable in the cylinder to force liquid from the pump chamber to the nozzle via the passage means,
- valve means operative to close the passage means in an inoperative condition of the atomizer, said valve means comprising means defining a valve seat movable with the first piston member, and a valve member engageable with the seat, the pressure of the liquid in the pump chamber tending to move the valve member out of engagement with the seat whereby to open the passage,
- bias means biasing the valve member into engagement with the seat, and
- means movable during operation of the piston member to engage the conduit means and interrupt communication between the conduit means and the pump chamber, said movable means being rigid with one of said members.
6 more elements
Dependencies are inferred from the claim text.