referring to fig1 and 2 , the cartridge assembly of the present invention is shown generally at 10 . as will be described in greater detail below , the cartridge assembly 10 of the present invention includes an outer housing 12 having a front section 14 and a back section 16 . an inner bladder 18 containing eyewash fluid , which is best seen in fig6 and 7 , is contained within the outer housing 12 . the housing 12 further includes a retaining bracket 20 which cooperates with an edge of one of the housing sections to capture the fill port of the inner bladder . in the context of using the cartridge assembly 10 in a gravity assist eyewash system similar to the prior art , the cartridge assembly 10 further includes a platen 64 positioned at the top of the housing 12 , and a pair of straps 22 depending from the platen 64 and extending out of the housing 12 for engagement with a fluid collection container or reservoir ( not shown ). the front and back housing sections 14 and 16 are preferably molded from a rigid plastic material . other rigid material having similar structural capabilities could also be utilized . the front section 14 and back section 16 of the outer housing 12 are box - shaped having an upper end and a lower end . other shapes could also be used . preferably , the front and back sections 14 , 16 are symmetrical mirror images of each other and thus interchangeable . the upper end is slightly narrower than the lower end to facilitate the formation of hanging brackets 26 , which will be described more fully below . each of the sections 14 , 16 has a main panel 28 with four depending sidewalls ( top 30 , left 32 , right 34 and bottom 36 ) depending therefrom . each sidewall 30 , 32 , 34 , 36 is connected to the adjacent sidewall to form the box shape . the outer - most edge of the depending sidewalls 30 , 32 , 34 , 36 is turned outwardly away from each respective sidewall and then inwardly towards the main panel 28 to form a rim 38 . near the upper end of each section and along the rim is a u - shaped section 40 that forms a hanging bracket . the u - shaped section 40 is formed by two sections 42 of the rim 28 extending therefrom near the narrow end of each section 14 , 16 . the front and back sections 14 , 16 are preferably snap - fit together with a number of reciprocal mating formations 44 aligned along the rims 28 of the front and rear sections 14 , 16 . these mating formations 44 can best be seen in fig3 , it being understood that the mating formations 44 are reciprocal to both sections 14 , 16 of the outer housing 12 to facilitate the interlocking thereof . although this configuration is preferred , many other structures can be used to retain the sections 14 , 16 of the outer housing 12 together and the preferred embodiment is by way of example and not a limitation of the present invention . referring to fig7 , the bottom sidewalls 36 of the front and back sections 14 , 16 of the outer housing 12 have an opening 46 formed therein with a semi - circle shaped edge 48 . the retaining bracket 20 , best seen in fig5 and 6 , cooperates with the opening 48 to form a circular orifice 50 in the outer housing 12 . the orifice 50 selectively captures a flanged fill port 52 of the inner bladder 18 therebetween and holds it firmly in place ( best seen in fig6 ). referring back to fig5 and 6 , the retaining bracket 20 has mounting tabs 54 formed thereon to facilitate attachment of a dispensing apparatus ( not shown ) to the outer housing 12 . the retaining bracket 20 also includes a semi - circular shaped lip 56 that cooperates with the opening 48 to form the orifice 50 . referring to fig3 , 4 and 8 , the inner bladder 18 fits snugly within the outer housing 12 with little room for the fluid to move within the confines of the housing 12 . the inner bladder 18 has a flanged fill port 52 having an upper flange 58 and a lower flange 60 extending from a dispensing spout 62 . as described briefly earlier , the upper and lower flanges 58 , 60 fit within the orifice 50 thus trapping the flanged fill port 52 in a fixed position within the orifice 50 . the inner bladder 18 is preferably filled with a “ sterile ” eyewash fluid , which one skilled in the art would be able to select according to the specifications and uses that are desired . while the specification clearly identifies the use of a sterile eyewash fluid , the invention should not be limited to the type of fluid . it is contemplated that the improved bag - in - a - box cartridge system can be used for any type of material , which could be filled within the bladder . as briefly mentioned hereinabove , a platen 64 is positioned on top of the inner bladder 18 , near the upper end of the outer clamshell casing 12 . two straps 22 loop through slots 66 in each end of the platen 64 and are threaded through slots 68 in the bottom of the outer housing 12 . during operation of an eyewash station , tension may be applied to the straps 22 by collecting the dispensed fluid in a container sitting on the straps , thus pulling the platen 64 downwardly and this exerting force a downward force on the inner bladder 18 to control the flow of eyewash fluid therefrom . it should be understood that the platen 64 and straps 22 are optional elements in the context of using the cartridge assembly in other industries and circumstances . after activation of the cartridge assembly 10 , the cartridge assembly 10 may be replaced onsite by removing the retaining bracket 20 and disassembling the halves 14 , 16 of the outer housing 12 . the inner bladder 18 may then be replaced with a fresh bladder and the cartridge 10 reassembled and reinstalled into the eyewash station . alternatively , the exhausted cartridge assembly 10 may be collected and refurbished offsite . referring to fig9 , an alternative embodiment of the cartridge assembly of the present invention is shown generally at 100 . the alternative embodiment 100 has housing with a front section 102 and back section 104 that interlock together , like the housing 12 of the preferred embodiment 10 . the alternative embodiment 100 housing also contains a bladder with a sealed filling port . however the bladder in this configuration has a dispensing hose 106 with a dispensing eyepiece 108 connected thereto . like the preferred embodiment 10 , the alternative embodiment 100 may also include an internal platen for applying pressure to the bladder . the platen is forced downward by pulling on a number of straps 110 that are connected to the platen . the straps 110 have looped ends 112 to facilitate applying pressure to the bladder . in all other respects , the alternative embodiment 100 is the same as the preferred embodiment 10 . therefore , it can be seen that the present invention provides a unique and improved alternative to the prior art by providing a cartridge assembly having a rigid plastic housing that firmly holds a dispensing spout of a flexible bag in place . it would be appreciated by those skilled in the art that various changes and modifications can be made to the illustrated embodiments without departing from the spirit of the present invention . all such modifications and changes are intended to be within the scope of the present invention , except insofar as limited by the appended claims .
a cartridge for an emergency eyewash stations is disclosed . the cartridge assembly includes a housing having a front section and a back section that couple together . the front section has a surface defining an opening into the housing . a sealed , fluid - containing bladder having a dispensing port is contained within the housing . a bracket is configured and arranged to couple to the opening on the front section of the housing such that the dispensing port is captured in a fixed position between the bracket and the surface on the front section defining the opening .