Dispensing apparatus
First Claim
1. Dispensing apparatus for dispensing a product from a container under pressure of a propellant, said apparatus comprising a product chamber within the container and a valve assembly adjacent to the product chamber, the product chamber containing a piston situated between the propellant and the valve assembly, characterised in that the valve assembly comprises:
- a cap secured to the container and provided with a central aperture, a valve inserted into the central aperture such that a protruding portion extends above the cap, the protruding portion being provided with an external thread, a retaining member provided with an internal thread screwed around the protruding portion to hold the valve in place in the cap, the retaining member having an external surface provided with longitudinal ribs, and an actuator positioned over the retaining member, the actuator having an internal surface provided with longitudinal ribs, such that the actuator and retaining member are rotationally coupled;
the apparatus further comprising a lever adapted to open the valve by pushing the actuator and valve down relative to the cap.
0 Assignments
0 Petitions
Accused Products
Abstract
A dispensing apparatus for dispensing a product from a container under pressure of a propellant by means of a composite piston. The apparatus has a valve operated by means of an actuator and a lever. The actuator co-operates with the valve and lever by means of a screw thread arrangement, such that turning actuator relative to the lever varies the flow rate of product out of the apparatus. The valve is a hollow cylindrical tube which is open at one end and closed at the second end, either permanently or by means of a flap valve which allows insertion of the product. A number of ports are arranged around the circumference of the tube adjacent to the second end to allow product to flow through the valve when the lever is operated. The composite piston comprises a first piston coupled to a second piston by mutually engageable central stems and enclosing between the pistons a viscous substance which contacts the inside wall of the container to provide an effective seal. The piston arrangement of the apparatus stays together without the need for “necking in” the can and the apparatus can be filled with product by the manufacturer.
-
Citations
10 Claims
-
1. Dispensing apparatus for dispensing a product from a container under pressure of a propellant, said apparatus comprising a product chamber within the container and a valve assembly adjacent to the product chamber, the product chamber containing a piston situated between the propellant and the valve assembly, characterised in that the valve assembly comprises:
-
a cap secured to the container and provided with a central aperture, a valve inserted into the central aperture such that a protruding portion extends above the cap, the protruding portion being provided with an external thread, a retaining member provided with an internal thread screwed around the protruding portion to hold the valve in place in the cap, the retaining member having an external surface provided with longitudinal ribs, and an actuator positioned over the retaining member, the actuator having an internal surface provided with longitudinal ribs, such that the actuator and retaining member are rotationally coupled;
the apparatus further comprising a lever adapted to open the valve by pushing the actuator and valve down relative to the cap. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
-
Specification