Mixing dispenser with a selectively retractable seal to permit intermixing of the ingredients

Claim 2

A combined mixer and pressure ejector for initially retaining two ingredients in separated relationship, permitting controlled mixing of said components, and controlled ejection of said mixed components comprising: a hollow barrel, a plunger reciprocally disposed partially inside said barrel, a deformable seal means radially projecting from said plunger and engageable with the walls of said barrel to provide upper and lower separated chambers within said barrel, said plunger incorporating manually operable means for enabling the retraction of said seal means away from the walls while the plunger is stationary within the barrel and said plunger and seal means being constructed and arranged to provide positive mixing of said components by the seal means by reciprocating said plunger with the seal means in retracted position, said manually operated means permitting return of the said means to the walls for enabling the ejection of said mixture.

Claim 3

In the mixer-ejector of claim 1, said plunger being hollow and said manually operated means being disposed partially inside the plunger for selectively retracting and releasing said seal means.

Claim 4

In the device of claim 2, said seal means comprising a closed resilient tube disposed over the outside of one end of said plunger and said manually operated means comprising a reciprocally disposed shaft located inside the plunger and having one end disposed against the tube to selectively stretch and release the resilient tube away from and toward the walls of the barrel.

Claim 5

A combined mixer and ejector for reactive components comprising: a hollow barrel, a hollow plunger, disposed partially inside said barrel, a deformable seal covering the open end of said plunger and having portions projecting radially outside said plunger to engage the inside walls of the barrel, a reciprocally moveable expander member disposed partially inside said plunger and being manually movable against said seal to selectively controllably retract said seal away from the walls for variable distances and permit automatic return of said seal thereagainst as effected by the resilience of the seal, whereby separate containers are provided within said barrel above and below said seal whose contents may be mixed by agitation of said plunger when the seal is retracted and whereby the resulting mixture may be ejected by movement of the plunger with the seal engaging the walls of the barrel.

Claim 6

A combined mixer and ejector for reactive components comprising: a hollow barrel, a hollow plunger, disposed partially inside said barrel, a deformable seal covering the open end of said plunger and having portions projecting radially outside said plunger to engage the inside walls of the barrel, a reciprocally moveable expander member disposed partially inside said plunger and being manually movable against said seal to selectively controllably retract said seal away from the walls for variable distances and permit automatic return of said seal thereagainst as effected by the resilience of the seal, whereby separate containers are provided within said barrel above and below said seal whose contents may be mixed by agitation of said plunger when the seal is retracted and whereby the resulting mixture may be ejected by movement of the plunger with the seal engaging the walls of the barrel.

Claim 7

In the dispenser of claim 4 said expandable seal comprising a cap of resilient material disposed over the end of said plunger within said barrel and expander means within said barrel for stretching said cap to reduce its circumferential diameter to retract said seal away from the walls of said barrel.

Claim 8

A disposable dispenser for storing ingredients in isolated areas, enabling mixing of said ingredients before use, and dispensing of said mixed ingredients, a hollow barrel member, a plunger disposed for movement inside said barrel, an expandable seal carried by said plunger to selectively engage and disengage with the walls of the barrel and provide separated chambers in said barrel above and below said seal for storing ingredients, and manually actuated means movable with respect to said plunger for radially contracting said seal away from the walls providing communication between said chambers for enabling mixing of said ingredients inside the barrel, said expandable seal being constructed and arranged to enable positive mixing of said ingredients by reciprocating the plunger with the seal disengaged from the walls of the barrel, said manually actuated means permitting return of the seal against the walls for enabling the dispensing of the mixed ingredients.

Claim 9

A disposable dispenser for storing ingredients in isolated areas, enabling mixing of said ingredients before use, and dispensing of said mixed ingredients, a hollow barrel member, a plunger disposed for movement inside said barrel, an expandable seal carried by said plunger to selectively engage and disengage with the walls of the barrel and provide separated chambers in said barrel above and below said seal for storing ingredients, and manually actuated means movable with respect to said plunger for radially contracting said seal away from the walls providing communication between said chambers for enabling mixing of said ingredients inside the barrel, said expandable seal being constructed and arranged to enable positive mixing of said ingredients by reciprocating the plunger with the seal disengaged from the walls of the barrel, said manually actuated means permitting return of the seal against the walls for enabling the dispensing of the mixed ingredients.

Claim 10

In the dispenser of claim 6, said manually actuated means comprising an expander member disposed partially inside said plunger and engageable with said seal to enable selective radial expansion and contraction of said seal toward and away from engagement with said barrel.

Claim 11

In the dispenser of claim 6, said expander being manually positionable against said seal to stretch and expand said seal, thereby reducing its thickness and removing its outeR surface out of sealing engagement with the barrel.

Claim 12

In the dispenser of claim 6, said seal having an opening therein and said expander being manually positionable to penetrate said opening, thereby expanding portions of said seal radially outwardly to engage with the walls of the barrel in sealing relationship.

Claim 13

In the dispenser of claim 6, said manually actuated means comprising a movable expander member disposed partially inside said plunger and having portions reciprocally movable to selectively produce and remove a column of compressed gas inside said plunger, thereby to selectively expand said seal to engage said walls and permit disengagement of the seal with said walls.

Claim 14

In the ejector of claim 1, said plunger including a manually positionable expander member for longitudinally elongating said seal to retract the seal from the walls and selectively withdrawable to permit return of said seal into engagement with the walls.

Claim 15

In the ejector of claim 1, said seal having an aperture therein and said plunger including a manually positionable expander member to selectively penetrate said aperture and radially expand the seal against the walls of the barrel.

Claim 16

In the ejector of claim 1, said plunger including means for selectively producing a compressed gas inside said plunger to expand the seal against the walls of the barrel.

Claim 17

In the ejector of claim 13, said compressed gas producing means including a piston disposed inside said plunger and manually positionable by an expander shaft.

Claim 18

A syringe for storing plural materials in separated relationship, permitting mixing of said materials, and controlled ejection of the mixed materials comprising: a hollow barrel, a hollow plunger reciprocally disposed inside of said barrel, a deformable seal supported by the plunger and having portions radially projecting from the plunger to engage with the inside walls of the barrel, an actuating member located partially inside of said hollow plunger and disposed for reciprocal movement with respect to said plunger, said member being in operative relationship to said seal to selectively enable retraction of the seal away from the walls of the barrel when said member is reciprocated with respect to the plunger, thereby enabling the mixing of said ingredients.

Claim 19

A syringe for storing plural materials in separated relationship, permitting mixing of said materials, and controlled ejection of the mixed materials comprising: a hollow barrel, a hollow plunger reciprocally disposed inside of said barrel, a deformable seal supported by the plunger and having portions radially projecting from the plunger to engage with the inside walls of the barrel, an actuating member located partially inside of said hollow plunger and disposed for reciprocal movement with respect to said plunger, said member being in operative relationship to said seal to selectively enable retraction of the seal away from the walls of the barrel when said member is reciprocated with respect to the plunger, thereby enabling the mixing of said ingredients.