Abstract: An apparatus for pressure dispensing of fluid products is provided having an elastomeric pressure unit disposed in surrounding relationship to a flexible, fluid-tight liner. The liner has its open end sealably engaged with a valve support, having a dispensing valve therein. The inherent contracting force which returns an expanded elastomeric pressure unit to its normal unexpanded position, provides the dispensing pressure for the product contained within the flexible liner, while the liner prevents contact between the product and the elastomeric material of the pressure unit. This abstract is not to be construed in any way to define or limit the invention set forth below.

Abstract: This invention provides a new, simple, inexpensive and expedient means of attaching an expandible elastomeric pressure unit within an existing vessel using a readily available valve for dispensing fluid products contained therein. The present invention by using elastomeric pressure units for the dispensing of fluid products under pressure no longer requires the use of propellent gas therewith since the dispensing energy is contained in the elastomeric material of the unit itself, the dispensing p.s.i. being controllable by varying the thickness of the walls of the said pressure unit and the composition and make-up thereof.The present invention also teaches various bonding techniques for efficiently attaching the pressure unit to the valve member in most cases where the container is filled through the valve itself and also for attaching the pressure unit to the vessel means in those cases wherein the container is filled around the valve but before the said valve is sealed into place.