Pressurized dispenser

Claim 2

A pressure apparatus for dispensing a fluid comprising: a resilient bladder having wall means defining a fluid chamber interior of the bladder and a fluid outlet in communication with the interior of the bladder; an outer casing disposed around the bladder and affixed thereto, said casing having an outlet; additional surface means exterior of the bladder against which a substantial portion of the bladder wall means is stretched for maintaining tension in the bladder wall means in the contracted position so that said bladder is substantially empty of fluid in the contracted position, said means including an elongate member exterior of the bladder and having one end integrally mounted on the inner surface of the casing and the other end interior of the casing, said elongate member being of a smaller cross-section at the end interior of the casing and gradually increasing to a larger cross-section where said elongate member is fixed to the casing, the bladder being disposed around the elongate member so as to contract tightly therearound and being of a size relative to the elongate member such that the elongate member prevents the bladder from contracting to its unstressed size, the difference in size and the elastic characteristics of the bladder being selected in accordance with the desired minimum pressure at which fluid is to be supplied from the container; said bladder having an elongate cylindrical tubular body of resilient material with an outlet at one end and being closed at the other end by a bottom wall, said bladder having a neck portion adjacent the outlet and said cylindrical body portion being of a transverse cross-section less than the largest transverse cross-section of said elongate member; said elongate member comprising a tapered mandril integrally fixed to the casing at the end opposite the casing outlet and extending toward the casing outlet; and said bladder in the contracted position being stretched over the mandril with the closed end of the bladder on the free end of the mandril and the body portion of the bladder stretched down over the mandril and doubled back along the mandril.

Claim 3

A pressurized apparatus in accordance with claim 1, wherein the bladder in the contracted position doubles back at a location about one-half of the distance from the casing wall adjacent the bladder outlet to the opposite end of the bladder.

Claim 4

A pressure apparatus for dispensing a fluid comprising: a resilient bladder having wall means defining a fluid chamber interior of the bladder and a fluid outlet in communication with the interior of the bladder; an outer casing disposed around the bladder and affixed thereto, said casing having an outlet; additional surface means exterior of the bladder against which a substantial portion of the bladder wall means is stretched for maintaining tension in the bladder wall means in the contracted position so that said bladder is substantially empty of fluid in the contracted position, said means including an elongate member exterior of the bladder and having one end integrally mounted on the inner surface of the casing and the other end interior of the casing, said elongate member being of a smaller cross-section at the end interior of the casing and gradually increasing to a larger cross-section where said elongate member is fixed to the casing, the bladder being disposed around the elongate member so as to contract tightly therearound and being of a size relative to the elongate member such that the elongate member prevents the bladder from contracting to its unstressed size, the difference in size and the elastic characteristics of the bladder being selected in accordance with the desired minimum pressure at which fluid is to be supplied from the container; said elongate member being tubular to provide a storage space, the interior of the elongate member being closed and the fixed end being open for access to the inner portion of the tubular member, and said apparatus further includes removable means for closing the access to the open end of said tubular member; and said elongate member being surrounded on said casing by a plurality of air vents and said removable closing means shields said air vents from access from without said casing to the inner portion of said casing thereby rendering said pressurized apparatus substantially tamperproof.

Claim 5

A pressure apparatus for dispensing a fluid comprising: a resilient bladder having wall means defining a fluid chamber interior of the bladder and a fluid outlet in communication with the interior of the bladder; an outer casing disposed around the bladder and affixed thereto, said casing having an outlet; additional surface means exterior of the bladder against which a substantial portion of the bladder wall means is stretched for maintaining tension in the bladder wall means in the contracted position so that said bladder is substantially empty of fluid in the contracted position, said means including an elongate member exterior of the bladder and having one end integrally mounted on the inner surface of the casing and the other end interior of the casing, said elongate member being of a smaller cross-section at the end interior of the casing and gradually increasing to a larger cross-section where said elongate member is fixed to the casing, the bladder being disposed around the elongate member so as to contract tightly therearound and being of a size relative to the elongate member such that the elongate member prevents the bladder from contracting to its unstressed size, the difference in size and the elastic characteristics of the bladder being selected in accordance with the desired minimum pressure at which fluid is to be supplied from the container; said elongate member being tubular to provide a storage space, the interior of the elongate member being closed and the fixed end being open for access to the inner portion of the tubular member, and said apparatus further includes removable means for closing the access to the open end of said tubular member; and said elongate member being surrounded on said casing by a plurality of air vents and said removable closing means shields said air vents from access from without said casing to the inner portion of said casing thereby rendering said pressurized apparatus substantially tamperproof.

Claim 6

A pressure apparatus for dispensing a fluid comprising: a resilient bladder having wall means defining a fluid chamber interior of the bladder and a fluid outlet in communication with the interior of the bladder; an outer casing disposed around the bladder and affixed thereto, said casing having an outlet; additional surface means exterior of the bladder against which a substantial portion of the bladder wall means is stretched for maintaining tension in the bladder wall means in the contracted position so that said bladder is substantially empty of fluid in the contracted position, said means including an elongate member exterior of the bladder and having one end integrally mounted on the inner surface of the casing and the other end interior of the casing, said elongate member being of a smaller cross-section at the end interior of the casing and gradually increasing to a larger cross-section where said elongate member is fixed to the casing, the bladder being disposed around the elongate member so as to contract tightly therearound and being of a size relative to the elongate member such that the elongate member prevents the bladder from contracting to its unstressed size, the difference in size and the elastic characteristics of the bladder being selected in accordance with the desired minimum pressure at which fluid is to be supplied from the container, said apparatus including a plurality of air vents extending through said casing for permitting evacuation of air from said casing and means for preventing access to said air vents from without the casing.

Claim 7

A pressure apparatus for dispensing a fluid comprising: a resilient bladder having wall means defining a fluid chamber interior of the bladder and a fluid outlet in communication with the interior of the bladder; an outer casing disposed around the bladder and affixed thereto, said casing having an outlet; additional surface means exterior of the bladder against which a substantial portion of the bladder wall means is stretched for maintaining tension in the bladder wall means in the contracted position so that said bladder is substantially empty of fluid in the contracted position, said means including an elongate member exterior of the bladder and having one end integrally mounted on the inner surface of the casing and the other end interior of the casing, said elongate member being of a smaller cross-section at the end interior of the casing and gradually increasing to a larger cross-section where said elongate member is fixed to the casing, the bladder being disposed around the elongate member so as to contract tightly therearound and being of a size relative to the elongate member such that the elongate member prevents the bladder from contracting to its unstressed size, the difference in size and the elastic characteristics of the bladder being selected in accordance with the desired minimum pressure at which fluid is to be supplied from the container, said apparatus including a plurality of air vents extending through said casing for permitting evacuation of air from said casing and means for preventing access to said air vents from without the casing.

Claim 8

A pressure apparatus for dispensing a fluid comprising: a resilient bladder having wall means defining a fluid chamber interior of the bladder and a fluid outlet in communication with the interior of the bladder; an outer casing disposed around the bladder and affixed thereto; additional surface means exterior of the bladder against which a substantial portion of the bladder wall means is stretched for maintaining tension in the bladder wall means in the contracted position so that said bladder is substantially empty of fluid in the contracted position; means for fixing said bladder to said casing comprising a gland member having a plurality of circumferentially spaced, radially extending pressure tabs thEreon; said bladder including an enlarged diameter portion circumferentially extending around the bladder adjacent the outlet end of said bladder and said bladder being folded back on itself at said enlarged diameter portion with the fold fitted within said gland adjacent said radial pressure tabs; and means on said apparatus for forcing said pressure tabs into sealing engagement with the fold of said bladder.

Claim 9

A pressure apparatus for dispensing a fluid comprising: a resilient bladder having wall means defining a fluid chamber interior of the bladder and a fluid outlet in communication with the interior of the bladder; an outer casing disposed around the bladder and affixed thereto; additional surface means exterior of the bladder against which a substantial portion of the bladder wall means is stretched for maintaining tension in the bladder wall means in the contracted position so that said bladder is substantially empty of fluid in the contracted position; means for fixing said bladder to said casing comprising a gland member having a plurality of circumferentially spaced, radially extending pressure tabs thEreon; said bladder including an enlarged diameter portion circumferentially extending around the bladder adjacent the outlet end of said bladder and said bladder being folded back on itself at said enlarged diameter portion with the fold fitted within said gland adjacent said radial pressure tabs; and means on said apparatus for forcing said pressure tabs into sealing engagement with the fold of said bladder.

Claim 10

A pressurized apparatus as defined in claim 5, wherein said bladder is folded back on itself so that the portion of said bladder intermediate said enlarged diameter portion and the outlet end of said bladder extends internally into the bladder.

Claim 11

An apparatus as defined in claim 5, wherein said pressure tabs are mounted on the outer periphery of said gland member and have a thin, radially tapered, flexible portion thereon for permitting bending of said tabs and a thick outer portion for applying pressure to said bladder.

Claim 12

A dispenser device for supplying fluid material under pressure comprising: a cylindrical bladder having resilient side wall means which are flexible from an expanded position in which a relatively large fluid chamber is defined interior of the bladder to a contracted position in which the fluid chamber is relatively small, the resilience of the wall means urging the bladder to the contracted position; an outlet formed in the bladder for the passage of fluid from the chamber; substantially flat bottom wall means on the bladder which move resiliently between a concave and a convex position; an outer casing disposed around the bladder; gland means connected in sealing relationship to the bladder outlet, said gland means having a passage therethrough for flow of fluid from the fluid chamber, said gland means having a cylindrical body and a plurality of pressure members extending radially from its periphery; surface means exterior of the bladder against which a substantial portion of the bladder side and bottom wall means are stretched for prestressing substantially the entire bladder wall means and causing a substantial portion of the interior surface of the bladder wall to be in surface-to-surface engagement with another portion of the interior surface of the bladder wall in the contracted position, whereby when in the contracted position, the bladder is substantially empty of fluid; said surface means comprising an axially tapered elongate mandril exterior of the bladder fixed to the outer casing opposite the gland and extending interior of the casing toward the gland, said mandril being approximately centered with respect to the bladder and terminating in a free end near the gland, said free end having a diameter slightly less than the diameter of said bladder; at least a portion of said bladder wall means being stretched around the mandril in the contracted position; said gland means extending through the outlet of the bladder and terminating in an end closely conforming to the free end of the mandril; the lower surface of the gland means being substantially the same shape as the mandril free end surface so that the free end surface of the mandril supports the gland means in an aligned position; said bladder having an enlarged diameter portion adjacent its outlet with the portion of said bladder above said enlarged diameter section being folded down into contact with the bladder side wall, the fold being inserted between the gland body and the pressure members which extend radially therefrom; and means for forcing said pressure members into engagement with said bladder for forming a fluid tight seal intermediate said bladder.

Claim 13

A dispenser device for supplying fluid material under pressure comprising: a cylindrical bladder having resilient side wall means which are flexible from an expanded position in which a relatively large fluid chamber is defined interior of the bladder to a contracted position in which the fluid chamber is relatively small, the resilience of the wall means urging the bladder to the contracted position; an outlet formed in the bladder for the passage of fluid from the chamber; substantially flat bottom wall means on the bladder which move resiliently between a concave and a convex position; an outer casing disposed around the bladder; gland means connected in sealing relationship to the bladder outlet, said gland means having a passage therethrough for flow of fluid from the fluid chamber, said gland means having a cylindrical body and a plurality of pressure members extending radially from its periphery; surface means exterior of the bladder against which a substantial portion of the bladder side and bottom wall means are stretched for prestressing substantially the entire bladder wall means and causing a substantial portion of the interior surface of the bladder wall to be in surface-to-surface engagement with another portion of the interior surface of the bladder wall in the contracted position, whereby when in the contracted position, the bladder is substantially empty of fluid; said surface means comprising an axially tapered elongate mandril exterior of the bladder fixed to the outer casing opposite the gland and extending interior of the casing toward the gland, said mandril being approximately centered with respect to the bladder and terminating in a free end near the gland, said free end having a diameter slightly less than the diameter of said bladder; at least a portion of said bladder wall means being stretched around the mandril in the contracted position; said gland means extending through the outlet of the bladder and terminating in an end closely conforming to the free end of the mandril; the lower surface of the gland means being substantially the same shape as the mandril free end surface so that the free end surface of the mandril supports the gland means in an aligned position; said bladder having an enlarged diameter portion adjacent its outlet with the portion of said bladder above said enlarged diameter section being folded down into contact with the bladder side wall, the fold being inserted between the gland body and the pressure members which extend radially therefrom; and means for forcing said pressure members into engagement with said bladder for forming a fluid tight seal intermediate said bladder.