PUMP MECHANISM WITH DOUBLE RESERVOIR AND STATIONARY FLUID PORTS

    公开(公告)号:US20240042126A1

    公开(公告)日:2024-02-08

    申请号:US18160429

    申请日:2023-01-27

    CPC classification number: A61M5/142 A61M2005/14252

    Abstract: Disclosed herein is a double reservoir configuration for a pumping mechanism for a drug delivery device wherein one reservoir is rigidly fixed to a housing of the device and the other reservoir moves linearly translates with respect to the fixed reservoir. To avoid having either the input fluid port or the output fluid port moves as the second reservoir linearly translates, one port is in fluid communication with the fixed reservoir and a second fluid port is in communication with the moving reservoir via a hollow tube supporting a static plunger disposed within the moving reservoir. This arrangement provides for the added benefit of allowing air trapped within either of the reservoirs to be almost completely removed as the pump mechanism is filled with the fluid.

    DRIVE MECHANISM FOR POSITIVE DISPLACEMENT PUMPS

    公开(公告)号:US20230117504A1

    公开(公告)日:2023-04-20

    申请号:US18047068

    申请日:2022-10-17

    Abstract: A novel embodiment of a drive mechanism for use in a pump, for example, of the type that would be used in a wearable drug delivery system, comprises, a cylindrically-shaped slider element configured with a channel on a circumferential surface thereof defining one or more zig-zag-shaped tracks therethrough. One or more pegs are engaged within the tracks, such that a back and forth longitudinal motion of the slider element along a radial axis of the cylinder causes movement of the pegs along one of the tracks through the channel, thus providing a movement of the pegs around the circumference of the cylinder which imparts a rotational motion to a header element disposed co-axially with the slider. The header element is in turn connected to a gear train, for example, a planetary gear box, which is coupled to the pump via a linkage or other type of mechanism.

    THERMAL WELD STRUCTURES FOR REDUCING TEARING OF AN ADHESIVE LAYER FOR AN ON-BODY MEDICAL DEVICE

    公开(公告)号:US20240033421A1

    公开(公告)日:2024-02-01

    申请号:US18362887

    申请日:2023-07-31

    Inventor: Jeffrey BARNES

    CPC classification number: A61M5/14248

    Abstract: The exemplary embodiments provide thermal weld structures that help prevent tearing of the adhesive layer of an on-body medical device when subject to lateral forces. These thermal weld structures help reduce the tearing by providing sacrificial thermal weld structures that will absorb forces and then potentially fail to thereby diffuse some of the lateral forces. The sacrificial thermal weld structures may take different forms. For instance, the sacrificial thermal weld structures may be gradient thermal weld structures where the amount of material melted in the gradient thermal weld structures decreases as a gradient along a dimension of the structures, such as their length. In some alternative embodiments, the width of the gradient thermal weld structure may vary instead of the height, or in conjunction with the height. In other exemplary embodiments, the sacrificial thermal weld structures may be dot thermal weld structures.

    CLUTCH DEVICE FOR COMPACT POSITIVE DISPLACEMENT PUMP OF A WEARABLE DRUG DELIVERY DEVICE

    公开(公告)号:US20230077167A1

    公开(公告)日:2023-03-09

    申请号:US17930347

    申请日:2022-09-07

    Abstract: Embodiments of the present disclosure relate to techniques, processes, devices or systems for pump devices. In one approach, a wearable drug delivery device, may include a reservoir configured to store a fluid, the reservoir comprising a housing including an outer wall defining an interior chamber, and a drive mechanism for driving the fluid from the reservoir. The drive mechanism may include a plunger received in the interior chamber of the reservoir, a leadscrew extending from the plunger, and a clutch mechanism threadably engaged with the leadscrew, wherein the clutch mechanism is configured to allow the leadscrew to pass through the clutch mechanism when disengaged and is configured to grip the leadscrew when engaged such that the clutch mechanism rotates to advance the leadscrew and the plunger into the reservoir.

Patent Agency Ranking