Device for spraying a predetermined dose of a fluid, and a method of filling the device
AssigneeEtablissements Valois (Societe anonyme)
InventorPhilippe Solignac
Life of this patent
Estimating the term…
Abstract
A device for spraying a single dose of a fluid in divided form includes a cylindrical tank (1) containing the dose of fluid, a piston (2) sliding in the cylindrical tank (1), a pusher for the piston (2), and outlet passage (5, 6) capable of communicating with the cylindrical tank (1). The piston (2) is displaceable relative to the pusher between a storage position, in which it prevents communication between the outlet passage (5, 6) and the cylindrical tank (1), and an actuation position, in which it puts the outlet passage (5, 6) into communication with the cylindrical tank (1). According to one aspect of the invention, the piston (2) is maintained in its storage position by wedging.
Claims25
A device for spraying a single dose of a fluid in divided form, the device comprising at least:
- a cylindrical tank (1) containing said single dose of fluid;
- a piston (2) slidable in a sealed manner in said cylindrical tank (1);
- a pusher for actuating the piston (2);
- and
- an outlet passage (5, 6) capable of communicating with said cylindrical tank (1) wherein said piston (2) is slidably mounted on said pusher and is displaceable relative to said pusher between a storage position in which it seals said cylindrical tank and prevents communication between said outlet passage (5, 6) and said cylindrical tank (1), and an actuation position in which it puts said outlet passage (5, 6) into communication with the cylindrical tank (1), the piston being placed so that a pressure obtaining in the cylindrical tank (1) attracts the piston (2) towards its actuation position,
- and wherein the piston (2) is held in its storage position by wedging, on the pusher, and can be displaced towards its actuation position only if the pressure that obtains inside the cylindrical tank is sufficient for unwedging it, said pressure being obtained by pushing on the pusher.
Dependencies are inferred from the claim text.