Spear valve for emptying and filling a pressurised beverage keg
AssigneeDaunia Plast S.P.A.
InventorMauro De Pasquale
Life of this patent
Estimating the term…
Abstract
A valve device (2) is provided for the filling and the emptying of a double-walled container (1) totally made of a plastic material such as PET or similar, wherein said container (1) comprises a first container (10) and a second container (11) made of yieldable plastic material and being inserted inside said first container (10), the valve device (2) comprises a valve body which includes a first tubular member (20) connected to a second tubular member (21), and a third tubular member (22) mounted in an axially movable manner inside said valve body against the action of a spring (23).
Claims14
A valve device for the filling and the emptying of a double-walled container totally made of a PET plastic material, wherein said container comprises a first container made of a substantially rigid plastic material, and a second container inserted inside said first container and made of a yieldable plastic material, thereby defining a gaseous inner volume between said first container and said second container, and a communicating port for communicating said inner volume with the outside, said port being formed at a neck part of a neck and at a mutual connection region of said first and second container, and an opening for the filling/emptying said container is provided at said neck part of the neck, said valve device being mounted onto said neck part of said neck of said container, and a locking member for the locking of said valve device onto said opening,
- wherein the valve device comprises a valve body which includes a first tubular member connected to a second tubular member, the latter connected in a blocked manner onto said opening of the container through said locking member, a third tubular member mounted in an axially movable manner inside said valve body against the thrust of a spring, said third tubular member being able to slide through a pneumatic sealing member arranged at one end part of said first tubular member, said third tubular member having a free end, the arrangement being such that said free end abuts against the thrust of said spring on a port at the central part of said second tubular member;
- and
- wherein said third tubular member internally comprises a spring which urges a sealing member against a port at the end part of said third tubular member, further comprising a connector having a double coaxial septum adapted to interconnect with said valve device during the filling and the emptying of said container, said connector having a first septum and a second septum, each of which is connected to a respective first and second supplying port connected each with a respective liquid and/or gas supply circuit.
A valve device for the filling and the emptying of a double-walled container totally made of a PET plastic material, wherein said container comprises a first container made of a substantially rigid plastic material, and a second container inserted inside said first container and made of a yieldable plastic material, thereby defining a gaseous inner volume between said first container and said second container, and a communicating port for communicating said inner volume with the outside, said port being formed at a neck part of a neck and at a mutual connection region of said first and second container, and an opening for the filling/emptying said container is provided at said neck part of the neck, said valve device being mounted onto said neck part of said neck of said container, and a locking member for the locking of said valve device onto said opening, wherein the valve device comprises a valve body which includes a first tubular member connected to a second tubular member, the latter connected in a blocked manner onto said opening of the container through said locking member, a third tubular member mounted in an axially movable manner inside said valve body against the thrust of a spring, said third tubular member being able to slide through a pneumatic sealing member arranged at one end part of said first tubular member, said third tubular member having a free end, the arrangement being such that said free end abuts against the thrust of said spring on a port at the central part of said second tubular member, wherein during dispensing of a beverage, a compressed gas is introduced at a pressure between 1.0 and 3.0 bar within the volume defined between the first container and the second container through said communication port, the arrangement being such that said beverage is dispensed under a constant pressure as a result of the progressive deformation of said second container as the volume of beverage decreases.
Dependencies are inferred from the claim text.