Device for dispensing product with directional guidance member

Claim 2

A drug type product delivery device for the continuous administration of a product, said device comprising, a. a wall surrounding an internal space, the space housing, b. a product compartment which serves as a reservoir for containing a beneficial product with the product compartment adjacent to, c. a propellant compartment which serves as a means for containing an agent for producing a gas having a vapor pressure above one atmosphere at the temperature of product administration, d. a valve between the compartments for directing the flow of a gas from the propellant compartment to the product compartment, e. a discharge metering means communicating with the product chamber and the exterior of the device for metering a product at a controlled and continuous rate from the product chamber, f. a hollow deformable member comprised of a flexible distendable material joined to the propellant compartment, g. the hollow deformable member freely movable from a collapsed position to an expanded position and movable from an expanded position to a collapsed position after a period of time, h. and wherein the device when positioned in the environment of use, the deformable member is moved from a collapsed to an expanded position by gas produced in the propellant compartment that moves into the deformable member and on release of the gas therefrom it subsequently returns to a collapsed position and while in the environment of use and when charged with product, said product is metered through the discharge means on movement of gas through the valve into the product compartment to continuously move a therapeutically effective amount of product from the product delivery device.

Claim 3

A product delivery device for the continuous administration of a product according to claim 1 wherein the hollow deformable member is provided with a bioerodible plug that on bioerosion vents the interior of the member to its exterior.

Claim 4

A product delivery device for the continuous administration of a product according to claim 1 wherein the hollow deformable member is formed of an elastic material perMeable to an inflating gas that slowly let the gas diffuse through the material to move the member from an expanded to collapsed position.

Claim 5

A product delivery device for the continuous administration of a product according to claim 1 wherein drug is metered through the discharge means in response to gas filling the product compartment to increase its volume while reducing the volume of drug in the product compartment.

Claim 6

A product delivery device for the continuous and controlled administration of a product according to Claim 1 wherein the device is contained in a bioerodible container.

Claim 7

A product delivery device for the continuous and controlled administration of a product according to claim 1 wherein a valve is positioned between the propellant compartment and the hollow deformable member.

Claim 8

A drug type delivery device for the continuous and controlled administration of a product for producing a beneficial effect, wherein the device comprises: a. a wall surrounding an internal space and formed of a material substantially impermeable to product, the space containing b. a reservoir compartment for containing a beneficial product, and c. a propellant compartment as a means for containing a chemical agent for producing a gas having a vapor pressure in excess of one atmosphere, at the temperature of product administration from the device, d. a piston slidably positioned between the reservoir compartment and the propellant compartment, the piston movable in response to gas produced in the propellant compartment, e. a metering means communicating with the reservoir and the exterior of the device for metering an effective amount of product at a controlled rate from the reservoir, f. a hollow deformable member comprised of a distendable material joined to the propellant compartment, g. the hollow deformable member movable from a collapsed to an expanded position and returnable to a collapsed position after a period of time, h. a passageway communicating with the propellant compartment and the deformable member, i. and wherein the device when positioned in the environment of use and when charged with product, the deformable member is inflated by gas flowing from the propellant compartment into the member, and product is urged through the metering means by the movement of the piston into the product compartment in response to gas produced in the propellant compartment to progressively decrease the volume of the reservoir as product is administered from the device.

Claim 9

A drug type delivery device for the continuous and controlled administration of a product for producing a beneficial effect, wherein the device comprises: a. a wall surrounding an internal space and formed of a material substantially impermeable to product, the space containing b. a reservoir compartment for containing a beneficial product, and c. a propellant compartment as a means for containing a chemical agent for producing a gas having a vapor pressure in excess of one atmosphere, at the temperature of product administration from the device, d. a piston slidably positioned between the reservoir compartment and the propellant compartment, the piston movable in response to gas produced in the propellant compartment, e. a metering means communicating with the reservoir and the exterior of the device for metering an effective amount of product at a controlled rate from the reservoir, f. a hollow deformable member comprised of a distendable material joined to the propellant compartment, g. the hollow deformable member movable from a collapsed to an expanded position and returnable to a collapsed position after a period of time, h. a passageway communicating with the propellant compartment and the deformable member, i. and wherein the device when positioned in the environment of use and when charged with product, the deformable member is inflated by gas flowing from the propellant compartment into the member, and product is urged through the metering means by the movement of the piston into the product compartment in response to gas produced in the propellant compartment to progressively decrease the volume of the reservoir as product is administered from the device.

Claim 10

A product delivery device for the continuous administration of a product according to claim 7 wherein the hollow deformable member is provided with a bioerodible plug that is capable of bioerosion in the environment of use to vent the interior of the member to its exterior.

Claim 11

A product delivery device for the continuous administration of a product according to claim 7 wherein the hollow deformable member is formed of an elastic material permeable to an inflating gas and slowly lets the gas diffuse through the material to move an expanded member to a collapsed member.

Claim 12

A product delivery device for the continuous administration of a product according to claim 7 wherein the product is a beneficial drug that can produce a local or systemic effect.

Claim 13

A product delivery device for the continuous administration of a product according to claim 7 wherein the device is contained in a bioerodible container formed of a material that can bioerode at a physiological temperature in a physiological environment.

Claim 14

A product delivery device for the continuous and controlled administration of a product according to claim 7 wherein a unidirectional valve is positioned between the propellant compartment and the deformable member.

Claim 15

A product delivery device for the continuous and controlled administration of a product according to claim 1 wherein the product delivery device is made of a material that can bioerode at biological temperatures over a perIod of time.