Abstract: A bladder assembly for operating a dispenser for fluid material. The dispenser includes a hinged pressure bar movable into and out of collapsing engagement with a collapsible tube which leads from a source of supply of the material to be dispensed. The bladder assembly includes a flexible bladder in fluid communication with a foot pump. The bladder is removably located within the dispenser behind the pressure bar so that inflation of the bladder by pumping air into it through a hose from the foot pump moves the pressure bar into collapsing engagement with the tube to dispense the material.

Abstract: A valve and dispensing assembly for dispensing powdered material from a container includes a flexible tube intended to be collapsed to actuate a valve which permits the tube to selectively open for dispensing the material through the tube. The assembly includes a flexible tube apparatus including a body attachable to the container and a valve releasably received within the tube and normally closing it off. Collapse of the tube causes it to move relatively of the valve to unseat it and open the tube for material discharge. The assembly also includes a declumper secured to the tube for movement therewith during collapse of the tube. The valve closes off the tube when in its uncollapsed condition while the tube and declumper move relatively of the valve during collapse to open the tube. A portion of the declumper is bifurcated and has serrated opposed edges which can engage the head of the valve during the tube collapse to assist in breaking up clumps which may have formed in the material.

Abstract: A fluid dispenser for use with a source of fluid having a flexible, valveless dispensing tube includes a base unit for support of the fluid source and a closure member normally closing off the end of the tube. The dispenser carries a cam and spring assembly which, upon the application of the hand pressure, moves a roller into engagement with the tube and moves the closure member out of engagement with the tube to open the end thereof and permit the fluid to be ejected therefrom.