A two-stage pump system is provided using electrostatic actuators. The system includes a pair of hydraulically-amplified, self-healing, electrostatic (HASEL) actuators in fluid communication with one another. Each actuator includes a deformable shell defining a working fluid compartment storing a dielectric fluid. Two electrodes are disposed on opposite sides of the deformable shell. A pair of fluid transfer bladders are disposed adjacent the respective pair of HASEL actuators, each including a fluid-impermeable membrane defining a transfer fluid chamber, and a biasing member disposed in the transfer fluid chamber. When individually actuated in an alternating two-stage pattern, the two electrodes of each respective HASEL actuator move from a neutral position to an attracted position, displacing dielectric fluid through the first transfer conduit and between working fluid compartments, thereby pumping the transfer fluid from an inlet to an outlet.

A two-stage pump system is provided using electrostatic actuators. The system includes a pair of hydraulically-amplified, self-healing, electrostatic (HASEL) actuators in fluid communication with one another. Each actuator includes a deformable shell defining a working fluid compartment storing a dielectric fluid. Two electrodes are disposed on opposite sides of the deformable shell. A pair of fluid transfer bladders are disposed adjacent the respective pair of HASEL actuators, each including a fluid-impermeable membrane defining a transfer fluid chamber, and a biasing member disposed in the transfer fluid chamber. When individually actuated in an alternating two-stage pattern, the two electrodes of each respective HASEL actuator move from a neutral position to an attracted position, displacing dielectric fluid through the first transfer conduit and between working fluid compartments, thereby pumping the transfer fluid from an inlet to an outlet.

A patch-sized fluid delivery device may include a reusable portion and a disposable portion. The disposable portion may include components that come into contact with the fluid, while the reusable portion may include only components that do not come into contact with the fluid. Redundant systems, such as redundant controllers, power sources, motor actuators, and alarms, may be provided. Alternatively or additionally, certain components can be multi-functional, such a microphones and loudspeakers that may be used for both acoustic volume sensing and for other functions and a coil that may be used as both an inductive coupler for a battery recharger and an antenna for a wireless transceiver. Various types of network interfaces may be provided in order to allow for remote control and monitoring of the device.

A patch-sized fluid delivery device may include a reusable portion and a disposable portion. The disposable portion may include components that come into contact with the fluid, while the reusable portion may include only components that do not come into contact with the fluid. Redundant systems, such as redundant controllers, power sources, motor actuators, and alarms, may be provided. Alternatively or additionally, certain components can be multi-functional, such a microphones and loudspeakers that may be used for both acoustic volume sensing and for other functions and a coil that may be used as both an inductive coupler for a battery recharger and an antenna for a wireless transceiver. Various types of network interfaces may be provided in order to allow for remote control and monitoring of the device.

The present invention is inherent to a shape memory alloy actuated fluidic subassembly (10) and to an equipment incorporating it as dispensing device, wherein actuation of the shape memory alloy wires (16, 16′) causes a fluid-tight reservoir (17″) to be compressed by a lid (18) so as to reduce its volume from a maximum volume Vo to a minimum volume V1, this reduction resulting in a pressure increase that causes the opening of an outlet flap (13″) and the dispensing of a fluid through an outlet channel (13).

Peristaltic pump comprising a housing (100), containing an electric motor (130) and a reduction gear (120, 122, 124, 126) configured to be driven by the electric motor (130), and a head (200) configured to be removably coupled to the housing (100), the head (200) housing a tube comprising two accessible ends and a rotor provided with two or more squeezing elements configured to squeeze the tube, the rotor being provided with a hub configured to be mechanically connected to the reduction gear when the head (200) is coupled to the housing (100), wherein the housing (100) further houses one or more alignment plates (140, 150) for aligning the reduction gear (120, 122, 124, 126), said one or more alignment plates (140, 150) being coupled to the housing (100) through snap-fit connection means.

An ocular drainage system is provided for treating diseases that produce elevated intraocular pressures, such as glaucoma, wherein the system includes an implantable device and an external control unit, the implantable device includes a non-invasively adjustable valve featuring at least one deformable tube and a disk rotatably mounted within a housing, such that rotation of the disk using the external control unit causes the disk to apply a selected amount of compression to the deformable tube, thereby adjusting the fluidic resistance of the deformable tube and regulating the intraocular pressure.

A peristaltic pump, and related method, are disclosed that includes a cam shaft, a plunger-cam follower, a tube receiver, a spring, a plunger, a door, and a plunger lift lever. The cam shaft includes a plunger cam. The plunger-cam follower engages with the plunger cam of the cam shaft. The spring provides a bias and the plunger is biased toward the tube receiver by the spring. The plunger is coupled to the plunger-cam follower where expansion of the plunger cam along a radial angle intersecting the plunger-cam follower as the cam shaft rotates actuates the plunger away from the tube receiver. The door lever can be actuated between a first position and a second position. The plunger lift lever is coupled to the door lever to actuate the plunger away from the tube receiver when the door lever is actuated to the second position.

Pump heads for peristaltic pump assemblies are provided. For example, a pump head for a peristaltic pump comprises an occlusion bed, a rotor guide, a rotor assembly positioned between the occlusion bed and the rotor guide, and a pathway for tubing. The pathway comprises an inlet portion, an outlet portion, and a connecting portion that connects the inlet and outlet portions. The inlet portion is defined between the occlusion bed and the rotor guide, the outlet portion is defined between the occlusion bed and the rotor guide, and the connecting portion is defined between the occlusion bed and the rotor assembly. Further, the occlusion bed is movable with respect to the rotor guide and the rotor assembly. In exemplary embodiments, the pump head urges fluid flow through the tubing to supply a cooling fluid to a medical probe assembly for delivering energy to a patient's body.

Fill stations and base stations are provided for personal pump systems. The fill stations may be opened and closed to accept a reservoir and to allow fluid to be introduced into the reservoir for use with personal pump systems. The fill stations may hold the reservoir at a tilt relative to an underlying surface and may discourage overfilling of the reservoir. The filling stations may also include viewing windows having fluid lines marked thereon for indicating volume of fluid within the reservoir.