Fluid delivery device needle retraction mechanisms, cartridges and expandable hydraulic fluid seals
First Claim
Patent Images
1. A fluid delivery device comprising:
- a housing configured to be coupled to a skin surface in an engaged position;
a fluid reservoir coupled to the housing;
an actuator coupled to the housing and configured to deliver a force to the fluid reservoir, the actuator having a first position and a second position; and
a needle assembly having a needle, the needle having a delivery end configured to extend from the housing and into the skin surface in a delivery configuration, the needle assembly being configured to automatically withdraw the delivery end of the needle into the housing upon the actuator moving from the first position to the second position;
a locking member configured to keep the delivery end of the needle within the housing in a locked position; and
an actuation button coupled to the needle and having a sleeve surrounding at least a portion of the needle, wherein the locking member is spring biased toward the sleeve, the sleeve having at least one abutment surface configured to engage with the locking member to prevent at least one of engaging and disengaging the needle.
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Abstract
A fluid delivery device includes an automatic needle retraction mechanism configured to automatically retract a delivery end of a needle into a housing. In one embodiment, the needle assembly is configured to automatically withdraw the delivery end of the needle into the housing upon an actuator moving from the first position to the second position. In one embodiment, the needle assembly is configured to automatically withdraw the delivery end of the needle into the housing upon decoupling a bottom surface of the housing from a skin surface.
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Citations
28 Claims
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1. A fluid delivery device comprising:
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a housing configured to be coupled to a skin surface in an engaged position; a fluid reservoir coupled to the housing; an actuator coupled to the housing and configured to deliver a force to the fluid reservoir, the actuator having a first position and a second position; and a needle assembly having a needle, the needle having a delivery end configured to extend from the housing and into the skin surface in a delivery configuration, the needle assembly being configured to automatically withdraw the delivery end of the needle into the housing upon the actuator moving from the first position to the second position; a locking member configured to keep the delivery end of the needle within the housing in a locked position; and an actuation button coupled to the needle and having a sleeve surrounding at least a portion of the needle, wherein the locking member is spring biased toward the sleeve, the sleeve having at least one abutment surface configured to engage with the locking member to prevent at least one of engaging and disengaging the needle. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13)
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14. A fluid delivery device comprising:
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a housing configured to be coupled to a skin surface in an engaged position; a fluid reservoir coupled to the housing; an actuator coupled to the housing and configured to deliver a force to the fluid reservoir, the actuator having a first position and a second position; and a needle assembly having a needle, the needle having a delivery end configured to extend from the housing and into the skin surface in a delivery configuration, the needle assembly being configured to automatically withdraw the delivery end of the needle into the housing upon the actuator moving from the first position to the second position; a locking member configured to keep the delivery end of the needle within the housing in a locked position; and a needle release configured to position the locking member into the locked position upon the actuator moving from the first position into the second position, wherein the needle release is spring biased, the needle release being retained in the first position by a lock release coupled to the actuator, the lock release configured to release the needle release and allow the needle release to move in a direction of the spring bias in the second position. - View Dependent Claims (15)
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16. A fluid delivery device comprising:
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a housing having a bottom surface, the bottom surface including an adhesive configured to releaseably couple the housing to a skin surface in an engaged position; a needle assembly having a needle, the needle having a delivery end configured to extend from the housing and into the skin surface in a delivery configuration, the needle assembly being configured to automatically withdraw the delivery end of the needle into the housing upon decoupling the bottom surface of the housing from the skin surface; a locking member configured to keep the delivery end of the needle within the housing in a locked position; a needle release configured to position the locking member into the locked position upon decoupling the housing from the skin surface; and a lock release configured to compress a spring biasing the needle release in the engaged position, the spring configured to move the needle release upon decoupling the housing from the skin surface. - View Dependent Claims (17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28)
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Specification