Continuous Spray Dispenser For Highly Corrosive And Other Low Compatibility Products

Abstract

A spray dispensing device including a first chamber defined by a container, a bladder contained within the first chamber that houses a fluid composition (e.g., a bleach composition), and an actuator in fluid communication with the first chamber so as to allow dispensing of the fluid composition from the bladder when the actuator is actuated (e.g., pressed). A pressurized composition may be contained within a second chamber, which acts as a pressure control device. The pressure of the pressurized composition may be in a range of from about 7 0 psi to about 150 psi. An outlet valve may provide selective fluid communication between the pressure control device (i.e., the second chamber) and the first chamber.

What is claimed is: 
     
         1 . A spray dispensing device, comprising:
 a container including,
 (i) a first chamber, and 
 (ii) a second chamber fluidly coupled to the first chamber; 
   a flexible bladder contained within the first chamber and configured to hold a fluid composition, wherein the flexible bladder is formed of a material compatible with the fluid composition;   an actuator in fluid communication with the flexible bladder and configured to dispense the fluid composition from the flexible bladder upon actuation; and   an outlet valve positioned between the first chamber and the second chamber;   wherein the first chamber is configured to have a first pressure and the second chamber is configured to have a second pressure, the second pressure being greater than the first pressure;   wherein upon actuation of the actuator, the container is configured to dispense the fluid composition from the flexible bladder while the second chamber fluidly communicates with the first chamber through the outlet valve.   
     
     
         2 . The spray dispensing device of  claim 1 , wherein the second chamber houses a pressurized composition at a pressure in the range from about 70 psi to about 150 psi. 
     
     
         3 . The spray dispensing device of  claim 2 , wherein the pressurized composition is selected from the group consisting of air, nitrogen, carbon dioxide, argon and combinations thereof. 
     
     
         4 . The spray dispensing device of  claim 1 , wherein the first chamber maintains a substantially constant pressure of about 25 psi to about 60 psi while the fluid composition is dispensed from the flexible bladder over a life of the spray dispensing device. 
     
     
         5 . The spray dispensing device of  claim 1 , wherein a constant pressure within the first chamber is maintained in the range of about 20 psi to about 70 psi. 
     
     
         6 . The spray dispensing device of  claim 1 , wherein the outlet valve is configured to allow a pressurized composition in the second chamber to flow to the first chamber, wherein the pressurized composition remains in the container. 
     
     
         7 . The spray dispensing device of  claim 6 , wherein the pressurized composition does not contact the fluid composition as the pressurized composition flows into the first chamber to apply a pressure to the flexible bladder to drive dispensing of the fluid composition upon actuation of the actuator. 
     
     
         8 . The spray dispensing device of  claim 1 , wherein the fluid composition includes one or more oxidizing agents selected from the group consisting of halogens, hypochlorites, hypochlorous acid, hydrogen peroxide, other peroxides, and combinations thereof. 
     
     
         9 . The spray dispensing device of  claim 1 , wherein the container has a longitudinal axis and non-linear sidewalls along the longitudinal axis and a transverse cross-section that varies along at least a portion of the longitudinal axis. 
     
     
         10 . The spray dispensing device of  claim 1 , wherein the container includes a side wall defining at least a portion of the first chamber and the second chamber and a separate bottom wall defining a portion of the second chamber. 
     
     
         11 . The spray dispensing device of  claim 10 , wherein the bottom wall includes a plug to seal a port through the bottom wall. 
     
     
         12 . The spray dispensing device of  claim 10 , further comprising a pressurized composition housed within the second chamber, wherein the pressurized composition comprises a liquid phase or a solid phase. 
     
     
         13 . The spray dispensing device of  claim 1 , wherein the container is made from a plastic material selected from the group consisting of polypropylene, polyethylene, polycarbonate, and combinations thereof. 
     
     
         14 . The spray dispensing device of  claim 1 , wherein the flexible bladder comprises an ethylene vinyl alcohol barrier film. 
     
     
         15 . A spray dispensing device, comprising:
 a container including,
 (i) a first chamber wherein a constant pressure within the first chamber is maintained in the range of about 20 psi to about 70 psi, and 
 (ii) a seond chamber fluidly coupled to the first chamber, wherein the second chamber houses a pressurized composition at a pressure in the range from about 70 psi to about 150 psi; 
   a flexible bladder contained within the first chamber and configured to hold a fluid composition, wherein the flexible bladder is formed of a material compatible with the fluid composition;   an actuator in fluid communication with the flexible bladder and configured to dispense the fluid composition from the flexible bladder upon actuation; and   an outlet valve positioned between the first chamber and the second chamber;   wherein upon actuation of the actuator, the container is configured to dispense the fluid composition from the flexible bladder while the second chamber fluidly communicates with the first chamber through the outlet valve.   
     
     
         16 . A spray dispensing device, comprising:
 a container having non-linear side walls, wherein a transverse cross-section of the container varies along a longitudinal axis of the container, the container including,
 (i) a first chamber having a first pressure, and 
 (ii) a second chamber fluidly coupled to the first chamber and configured to hold a pressurized composition having a second pressure; 
   a flexible bladder housed within the first chamber and configured to contain a fluid composition;   an actuator in fluid communication with the flexible bladder and configured to dispense the fluid composition from the flexible bladder upon activation; and   an outlet valve positioned between the first chamber and the second chamber;   wherein the second pressure is greater than the first pressure;   wherein the pressurized composition does not contact the fluid composition as the pressurized composition flows into the first chamber from the second chamber through the outlet valve;   wherein upon actuation of the actuator, the container is configured to dispense the fluid composition from the flexible bladder while the second chamber fluidly communicates with the first chamber through the outlet valve.   
     
     
         17 . The spray dispensing device of  claim 16 , further comprising a separate bottom wall configured to couple to the side wall to define the second chamber. 
     
     
         18 . The spray dispensing device of  claim 17 , wherein the pressurized composition comprises a liquid phase or a solid phase. 
     
     
         19 . The spray dispensing device of  claim 16 , wherein the fluid composition includes a bleach composition and the flexible bladder is formed of a material compatible with the bleach composition. 
     
     
         20 . The spray dispensing device of  claim 16 , wherein the first chamber maintains a substantially constant pressure of about 25 psi to about 60 psi while the fluid composition is dispensed from the flexible bladder over a life of the spray dispensing device.