Multiple compartment ampule for automatic hypodermic syringes
First Claim
1. An ampule for an automatic hypodermic syringe comprising at least two axially aligned and hermetically separated compartments adapted to contain respective medicated substances, a nipple member disposed at one end of the ampule, a needle holder mounted in said nipple member and supporting a hollow needle, said needle holder being displaceable between a standby position and an operative or injecting position, an intermediate partition normally hermetically separating said two compartments, said intermediate partition having a valve member, actuating means cooperable with said valve member after a first of said compartments is substantially emptied of its medicated substance to open a path of flow through said intermediate partition to bring the second of said compartments into communication with said hollow needle.
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Abstract
An ampule for an automatic hypodermic syringe comprises at least two axially aligned and hermetically separated compartments containing respective medicated substances. A nipple member is disposed at one end of the ampule. A needle holder is slidably mounted in said nipple member and supports a hollow needle. An intermediate partition normally hermetically separates the two compartments. The intermediate partition has a valve member adapted to open a path of flow through the intermediate partition to bring the second of the compartments into communication with the needle hollow after a first of the compartments is substantially emptied. Preferably, there are two intermediate partitions and three compartments.
183 Citations
12 Claims
- 1. An ampule for an automatic hypodermic syringe comprising at least two axially aligned and hermetically separated compartments adapted to contain respective medicated substances, a nipple member disposed at one end of the ampule, a needle holder mounted in said nipple member and supporting a hollow needle, said needle holder being displaceable between a standby position and an operative or injecting position, an intermediate partition normally hermetically separating said two compartments, said intermediate partition having a valve member, actuating means cooperable with said valve member after a first of said compartments is substantially emptied of its medicated substance to open a path of flow through said intermediate partition to bring the second of said compartments into communication with said hollow needle.
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10. An automatic hypodermic syringe comprising a drive mechanism and an ampule, said ampule comprising a least two axially aligned and hermetically separated compartments adapted to contain respectively medicated substances, a nipple member disposed at one end of said ampule, a needle holder slidably mounted in said nipple member and supporting a hollow needle, said needle holder being slidable between a standby position and an operative injecting position, an intermediate partition normally sealingly separating said two compartments, said intermediate partition having a valve member, actuating means cooperable with said valve member after a first of said compartments is substantially emptied of its medicated substance to open a path of flow through said intermediate partition to bring the second of said compartments into communication with said hollow needle.
Specification