초록
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A dispenser has a housing, and a variable-volume storage chamber formed within the housing and defining a substantially fluid-tight seal between the chamber and exterior of the housing for storing a substance to be dispensed. A piston is mounted within the housing, and a one-way valve is mounted within the housing and coupled in fluid communication with the variable-volume storage chamber. A compression chamber is coupled in fluid communication between the piston and one-way valve, and at least one of the piston and valve is manually depressible relative...
A dispenser has a housing, and a variable-volume storage chamber formed within the housing and defining a substantially fluid-tight seal between the chamber and exterior of the housing for storing a substance to be dispensed. A piston is mounted within the housing, and a one-way valve is mounted within the housing and coupled in fluid communication with the variable-volume storage chamber. A compression chamber is coupled in fluid communication between the piston and one-way valve, and at least one of the piston and valve is manually depressible relative to the other between (i) a first position in which the piston is located at least partially outside of the compression chamber for permitting substance to flow from the variable-volume storage chamber into the compression chamber, and (ii) a second position in which the piston is located at least partially within the compression chamber for pressurizing substance within the compression chamber above a valve opening pressuring and, in turn, dispensing substance through the one-way valve and out of the dispenser.
대표
청구항
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What is claimed is: 1. A dispenser comprising: a housing; a variable-volume storage chamber located within the housing and defining a substantially fluid-tight seal between the chamber and exterior of the housing for storing a substance to be dispensed; a manually engageable surface mounted on the housing that is manually engageable and depressible to actuate the dispenser, wherein the manually engageable surface is manually depressible between first and second positions and is normally biased in a direction from the second position toward the first pos...
What is claimed is: 1. A dispenser comprising: a housing; a variable-volume storage chamber located within the housing and defining a substantially fluid-tight seal between the chamber and exterior of the housing for storing a substance to be dispensed; a manually engageable surface mounted on the housing that is manually engageable and depressible to actuate the dispenser, wherein the manually engageable surface is manually depressible between first and second positions and is normally biased in a direction from the second position toward the first position; a one-way valve mounted on the housing and connectible in fluid communication with the variable-volume storage chamber, wherein the one-way valve includes an elastic arcuate-shaped valve member, and a relatively rigid arcuate-shaped valve seat, wherein the valve member and valve seat form an interference fit defining a normally closed arcuate, axially-extending outlet forming a fluid-tight seal that prevents a flow of the substance therethrough but that allows the substance within the valve to flow therethrough when the substance exceeds a valve opening pressure; a compression chamber connectible in fluid communication between the variable volume storage chamber and the one-way valve, wherein (i) during movement of the manually engageable surface in the direction from the second position toward the first position, the variable-volume storage chamber is in fluid communication with the compression chamber for permitting the substance to flow from the variable-volume storage chamber into the compression chamber, and (ii) during movement of the manually engageable surface in a direction from the first position toward the second position, the compression chamber is not in fluid communication with the variable-volume storage chamber and the substance within the compression chamber is pressurized above the valve opening pressuring and, in turn, dispensed through the normally closed outlet of the one-way valve assembly and out of the dispenser. 2. A dispenser as defined in claim 1, further comprising: a piston mounted within the housing, wherein in the first position the piston is located at least partially outside of the compression chamber, and in the second position the piston is located at least partially within the compression chamber; and a biasing member for biasing at least one of the piston and valve in the direction from the second position toward the first position. 3. A dispenser as defined in claim 1, further comprising a biasing member for biasing the manually engageable surface in the direction from the second position toward the first position, wherein the biasing member is at least one of a coil spring and a resilient, elastomeric spring. 4. A dispenser as defined in claim 3, wherein the resilient, elastomeric spring is approximately dome shaped. 5. A dispenser as defined in claim 1, wherein the axially-extending valve member and the valve seat define a normally-closed, axially-extending seam therebetween forming a fluid-tight seal between the valve member and valve seat, and the one-way valve defines at least one outlet aperture coupled in fluid communication between the compression chamber and the seam, wherein the valve member is movable relative to the valve seat and the seam is connectable in fluid communication with the outlet aperture to allow the flow of the substance from the compression chamber through the seam and out of the dispenser. 6. A dispenser as defined in claim 5, wherein the valve member is responsive to the flow of the substance in the outlet aperture exceeding the valve opening pressure to move between (i) a normally-closed condition, and (ii) an open condition wherein portions of the valve member axially spaced relative to each other substantially sequentially move substantially radially relative to the valve seat to allow the flow of the substance through the seam and out of the dispenser. 7. A dispenser as defined in claim 1, further comprising one of (i) a flexible bladder mounted within the housing and defining the variable-volume storage chamber, and (ii) a slidable wall mounted within the housing and defining the variable-volume storage chamber between the slidable wall and the housing. 8. A dispenser as defined in claim 1, further comprising a piston mounted within the housing, wherein in the first position the piston is located at least partially outside of the compression chamber, and in the second position the piston is located at least partially within the compression chamber, wherein the piston is fixed relative to the valve, and the valve is manually depressible with the manually engageable surface relative to the piston between the first and second positions. 9. A dispenser as defined in claim 2, wherein the valve includes a valve body defining the compression chamber for receiving therein the piston, an axially-extending valve seat, and an axially-extending flexible valve member seated on the valve seat and defining a normally-closed, axially-extending seam between the valve member and valve seat, and wherein the valve body defines a first bore for receiving the piston in the second position, and a passageway between the first bore and piston for permitting the flow of the substance therethrough from the variable-volume storage chamber into the compression chamber. 10. A dispenser as defined in claim 9 , wherein the valve body further defines at least one outlet aperture coupled in fluid communication between the compression chamber and the seam, and a second bore formed between the first bore and the outlet aperture and defining therein the compression chamber. 11. A dispenser as defined in claim 10, wherein the valve body further defines an annular surface that tapers radially inwardly between the first and second bores. 12. A dispenser as defined in claim 6, wherein the flexible valve member includes a first portion connected to the valve body on one side of the seam, and a second portion connected to the housing on an opposite side of the seam relative to the first portion, and a movable portion extending between the second portion and the seam for permitting movement of the manually engageable surface between the first and second positions. 13. A dispenser as defined in claim 1, wherein the outlet of the one-way valve is defined by a seam that extends about a peripheral portion of the manually engageable surface and the substance is dispensed therethrough onto the manually engageable surface. 14. A dispenser as defined in claim 1, further comprising a guide extending between the valve and housing for guiding movement of the manually engageable surface between the first and second positions, and a spring coupled between the guide and housing for biasing the valve in the direction from the second position toward the first position. 15. A dispenser as defined in claim 2, wherein the valve and piston are axially aligned, and the variable-volume storage chamber is spaced radially relative to the valve and piston. 16. A dispenser as defined in claim 1, wherein the variable-volume storage chamber is substantially airless. 17. A dispenser as defined in claim 1, further comprising a plunger received within the housing and forming a substantially fluid-tight seal therebetween, wherein the plunger is movable axially upon dispensing a volume of dosage from the storage chamber to reduce the volume of the storage chamber in an amount approximately equal to the volume of the dosage dispensed. 18. A dispenser as defined in claim 1, further comprising a filling port mounted on the housing, and a second one-way valve coupled in fluid communication between the filling port and the variable volume storage chamber for filling the storage chamber therethrough. 19. A dispenser as defined in claim 18, wherein the second one-way valve includes an axially-extending valve seat and an axially-extending flexible valve member seated on the valve seat and defining a normally-closed, axially-extending seam therebetween forming a fluid-tight seal between the valve member and valve seat, and the flexible valve member is movable relative to the valve seat and the seam is connectable in fluid communication with variable-volume storage chamber to permit the passage of substance through the seam and into the storage chamber. 20. A dispenser as defined in claim 5, wherein the valve seat defines at least one tapered portion that tapers radially outwardly in a direction from an interior to an exterior of the valve, and the flexible valve member forms an interference fit with the valve seat. 21. A dispenser as defined in claim 1, wherein the outlet of the one-way valve is adjacent to the manually engageable surface and the substance is dispensed therethrough onto the manually engageable surface. 22. A dispenser comprising: a housing; a variable-volume storage chamber for receiving and storing a substance; manually engageable surface for actuating the dispenser that is mounted on the housing, is manually depressible between first and second positions, and is normally biased in a direction from the second position toward the first position; one-way valve for dispensing the substance and preventing the substance from flowing therethrough in an opposite direction, wherein the one-way valve is connectible in fluid communication with the variable-volume storage chamber, and defines an arcuate, axially-extending shape for elastically forming a normally closed outlet for preventing a flow of the substance therethrough but allowing the substance within the one-way valve to flow therethrough when the substance exceeds a valve opening pressure; and for receiving a portion of the substance stored in the variable-volume storage chamber and pressurizing the substance, wherein the means is connectible in fluid communication between the variable-volume storage chamber and the one-way valve, and (i) during movement of the manually engageable surface in the direction from the second position toward the first position, the variable-volume storage chamber is in fluid communication with the means for permitting the substance to flow from the variable-volume storage chamber into the means, and (ii) during movement of the manually engageable surface in a direction from the first position toward the second position, the means is not in fluid communication with the variable-volume storage chamber and the substance within the means is pressurized above the valve opening pressure of the one-way valve and, in turn, dispensed through the one-way valve and out of the dispenser. 23. A dispenser as defined in claim 22 wherein the means is a compression chamber connectible in fluid communication between the variable volume storage chamber and the one-way valve, wherein (i) during movement of the manually engageable surface in the direction from the second position toward the first position, the variable-volume storage chamber is in fluid communication with the compression chamber for permitting the substance to flow from the variable-volume storage chamber into the compression chamber, and (ii) during movement of the manually engageable surface in the direction from the first position toward the second position, the compression chamber is not in fluid communication with the variable-volume storage chamber and the substance within the compression chamber is pressurized above the valve opening pressuring and, in turn, dispensed through the normally closed outlet of the one-way valve assembly and out of the dispenser. 24. A method for storing and dispensing a sterile liquid product comprising the following steps: (i) maintaining a sterile liquid product hermetically sealed within a variable-volume storage chamber received within a housing of a dispenser and defining a substantially fluid-tight seal between the chamber and exterior of the housing; (ii) manually engaging a manually engageable surface mounted on the housing and depressing the manually engageable surface between a first position and a second position; (iii) during movement of the manually engageable surface in a direction from the first position toward the second position, pressurizing the sterile liquid product within a compression chamber of the dispenser above a valve opening pressure, and in turn dispensing the pressurized sterile liquid product through a normally closed arcuate, axially-extending outlet of a one-way valve mounted on the housing and out of the dispenser, wherein the one-way valve includes an elastic arcuate-shaped valve member, and a relatively rigid arcuate-shaped valve seat forming an interference fit and fluid-tight seal therebetween; (iv) allowing a biasing element to move the manually engageable surface in a direction from the second position toward the first position; (v) during movement of the manually engageable surface in the direction from the second position toward the first position, drawing fluid from the variable-volume storage chamber into the compression chamber; (vi) dispensing a plurality of different portions of the sterile liquid product at different points in time from the variable-volume storage chamber through the one-way valve by repeating steps (ii) through (v); and (vii) maintaining the sterile liquid product within the variable-volume storage chamber sterile and hermetically sealed with respect to ambient atmosphere throughout steps (i) through (vi). 25. A method as defined in claim 24, further comprising step of substantially preventing ingress of air or other contaminants through the one-way valve and into the variable-volume storage chamber during steps (i) through (vii). 26. A method as defined in claim 24, further comprising maintaining throughout step (iii) different substantially annular segments of the valve member in engagement with the valve seat to maintain the fluid-tight seal across the one-way valve and prevent ingress through the one-way valve of germs, bacteria or other unwanted substances and into the variable-volume storage chamber. 27. A method as defined in claim 24, further comprising the step of maintaining the variable-volume storage chamber substantially airless throughout steps (i) through (vii). 28. A method as defined in claim 24, further comprising the following steps: sterile filling the variable-volume storage chamber with the sterile liquid product; and hermetically sealing the sterile liquid product within the variable-volume storage chamber. 29. A method as defined in claim 28, further comprising the step of sterilizing the sterile liquid product prior to the step of sterile filling the variable-volume storage chamber with the sterile liquid product. 30. A method as defined in claim 24, wherein the sterile liquid product is one of a cream or a gel. 31. A method as defined in claim 24, wherein the sterile liquid product is preservative free.