Fluid delivery device having an insertable prefilled cartridge
Inventors
Gregory, Christopher C. • Johnson, Matthew P. • Standley, Robert L.
Assignees
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Publication Number
US-12168114-B2
Publication Date
2024-12-17
Expiration Date
Abstract
A fluid delivery device includes a housing having a bottom surface configured to be coupled to the skin surface. The fluid delivery device includes a cartridge prefilled with a fluid and configured to be inserted into the housing. The cartridge has a septum configured to be generally perpendicular to the bottom surface when the cartridge is inserted in the housing. The fluid delivery device includes a needle assembly that has a needle that includes a fluid coupling end and a delivery end. The fluid coupling end of the needle is fluidly disengaged from the cartridge in an initial position. The delivery end of the needle extends past the plane of the bottom surface and the fluid coupling end of the needle extends through the septum in a deployed position.
Core Innovation
A fluid delivery device includes a housing having a bottom surface configured to be coupled to a skin surface. The housing contains a hydraulic fluid drive with a hydraulic fluid, including a first hydraulic chamber and a second hydraulic chamber fluidly coupled by a flow restrictor, and a cartridge prefilled with a fluid and configured to be inserted into the housing, the cartridge having a septum.
A needle assembly includes a needle with a fluid coupling end and a delivery end. In an initial position, the fluid coupling end is fluidly disengaged from the cartridge, and in a deployed position the delivery end extends past a plane co-planar with the bottom surface while the fluid coupling end extends through the septum in the deployed position. The cartridge includes a piston that is moveable by the hydraulic fluid when the needle is in the deployed position.
The hydraulic fluid drive includes a port configured to couple with the cartridge, where the port has a seal that is closed prior to inserting the cartridge into the housing and released when the cartridge is coupled with the port. The device further includes a seal that includes a slideable valve with one or more fluid passages configured to fluidly couple the hydraulic fluid drive and the piston. In related embodiments, the hydraulic fluid drive is fluidly coupled to an accumulator to allow thermal expansion and contraction of the hydraulic fluid.
Claims Coverage
The provided material includes four independent claims (clm-00001, clm-00004, clm-00006, clm-00007). Across these claims, the inventive features cover a skin-coupled housing with a two-chamber hydraulic fluid drive, a prefilled cartridge with a septum, and a needle assembly that moves from an initial fluidly disengaged state to a deployed state that extends through the septum, with variations focused on port/seal behavior and cartridge/piston/septum interface structures.
Skin-coupled housing with hydraulic fluid drive
A housing having a bottom surface configured to be coupled to a skin surface, including a hydraulic fluid drive containing a hydraulic fluid with a first hydraulic chamber and a second hydraulic chamber fluidly coupled by a flow restrictor.
Prefilled cartridge with septum and piston moved by hydraulic fluid
A cartridge prefilled with a fluid and configured to be inserted into the housing, the cartridge having a septum; the cartridge including a piston moveable by the hydraulic fluid when the needle is in the deployed position.
Needle assembly with deployed position extending through septum
A needle assembly having a needle including a fluid coupling end and a delivery end, the fluid coupling end of the needle fluidly disengaged from the cartridge in an initial position, the delivery end extending past a plane co-planar with the bottom surface in a deployed position, and the fluid coupling end extending through the septum in the deployed position.
Port seal closed prior to cartridge insertion and released upon coupling
A port configured to couple with the cartridge, the port having a seal that is closed prior to inserting the cartridge into the housing and released when the cartridge is coupled with the port.
Slideable valve with fluid passages coupling hydraulic drive and piston
A seal that includes a slideable valve having one or more fluid passages configured to fluidly couple the hydraulic fluid drive and the piston.
Accumulator allowing thermal expansion and contraction of hydraulic fluid
The hydraulic fluid drive is fluidly coupled to an accumulator configured to allow thermal expansion and contraction of the hydraulic fluid.
Ball joint receiver at an acute angle relative to bottom surface
The port includes a ball joint receiver that is at an acute angle relative to the bottom surface of the housing until the cartridge is retained in place relative to the housing.
Piston spike configured to pierce the seal when coupled
The piston includes a spike configured to pierce the seal when the cartridge is coupled with the port.
Across the independent claims, the core claim coverage centers on a skin-coupled housing with a hydraulic fluid drive, a prefilled cartridge having a septum and a hydraulically moveable piston, and a needle assembly that transitions from an initial fluidly disengaged state to a deployed state in which the needle delivery end extends past the bottom-surface plane and the fluid coupling end extends through the septum. Claim variations further specify port seal operation, slideable valve fluid passages, an accumulator for thermal expansion and contraction, a ball joint receiver at an acute angle, and a piston spike configured to pierce the seal when coupled.
Stated Advantages
Documented Applications
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