초록 ▼

An apparatus for dispensing for fluids. The apparatus generates its own positive pressure from a prestressed elastomeric material. The dispenser includes a resilient bladder of generally tubular shape having an open end into which an internal prestressing mandrel is inserted to prestress the bladder

An apparatus for dispensing for fluids. The apparatus generates its own positive pressure from a prestressed elastomeric material. The dispenser includes a resilient bladder of generally tubular shape having an open end into which an internal prestressing mandrel is inserted to prestress the bladder in both the radial and axial directions. The mandrel has at least three fins joined along longitudinal edges to form a plurality of passages, the bladder being joined or otherwise secured to the mandrel at both ends, and the passages being in communication with a valve means. A simplified valve means for filling and dispensing is also included.

대표청구항 ▼

A fluid dispenser comprising a container body; a resilient bladder of generally tubular shape having an open end; and an internal prestressing mandrel comprising a first end, a second end, at least three fins joined at a common longitudinal edge to form a plurality of passages therealong, and a flan

A fluid dispenser comprising a container body; a resilient bladder of generally tubular shape having an open end; and an internal prestressing mandrel comprising a first end, a second end, at least three fins joined at a common longitudinal edge to form a plurality of passages therealong, and a flange on the first end connectable to a valve means, said resilient bladder being stretched around the mandrel and sealed around the first end and the second end of the mandrel, the resilient bladder being subjected to both radial and axial stresses, wherein the valve means comprises a ferrule having a gasket surface on one side thereof; a spring; a cup member positioned within the first end of the mandrel, the cup member having a shoulder therein and biased by the spring against the gasket surface to form a seal against the gasket surface; and a hollow stem inserted through the ferrule and the gasket surface and into the cup member contacting the shoulder therein, the gasket surface sealing against an outer surface of the hollow stem, the cup member being movable away from the gasket surface by depression of the hollow stem forming a communication channel from the passages, past the gasket surface into the cup member, and into the hollow stem, wherein the ferrule secures the valve means to the flange.