Piezoelectric micropump with diaphragm and valves
AssigneeVentaira Pharmaceuticals, Inc.
InventorsRichard D. Peters, David Rust Busick, Theodore Robert Adams
Life of this patent
Estimating the term…
Abstract
A micropump comprising a pump body including a fluid inlet channel, a fluid outlet channel and pumping reservoir, the fluid inlet channel and the fluid outlet channel communicating with the pumping reservoir, a diaphragm covering the pumping reservoir, a piezoelectric strip actuator attached to the diaphragm such that by applying a voltage to the actuator, the diaphragm can be raised or lowered relative to the pumping chamber, a valve on the inlet channel and the outlet channel, the valve opening and closing the inlet and the outlet channel in response to the raising and lowering of the diaphragm.
Claims27
A micropump comprising:
- a pump body including a fluid inlet channel, a fluid outlet channel and pumping reservoir, the fluid inlet channel and the fluid outlet channel communicating with the pumping reservoir,
- a diaphragm covering the pumping reservoir,
- a piezoelectric strip actuator attached to the diaphragm such that by applying a voltage to the actuator, the diaphragm can be raised or lowered relative to the pumping chamber,
- a valve on the inlet channel and the outlet channel, the valve opening and closing the inlet and the outlet channel in response to the raising and lowering of the diaphragm.
A micropump comprising:
- a pump body having a fluid outlet channel, a fluid inlet channel, a first pumping reservoir and a second pumping reservoir,
- first and second diaphragms covering respectively the first and second pumping reservoirs,
- a piezoelectric strip actuator attached to both the first and second diaphragms such that by applying a first voltage to the actuator, the first diaphragm can be raised and the second diaphragm lowered relative to the pumping chambers and upon applying a second voltage to the actuator, the first diaphragm can be lowered and the second diaphragm can be raised relative to the pumping chambers, and valves on the inlet channel and the outlet channel.
A micropump comprising a pump body having a fluid inlet channel, a fluid outlet channel, a first pumping chamber and a second pumping chamber,
- a first diaphragm covering the first pumping chamber and second diaphragm covering the second pumping chamber,
- a first piezoelectric strip actuator attached to the first diaphragm such that by applying a voltage to the actuator, the diaphragm can be raised or lowered relative to the reservoir,
- a second piezoelectric strip actuator attached to the second diaphragm such that by applying a voltage to the second actuator, the second diaphragm can be raised or lowered relative to the pumping chamber.
- an inlet valve in the inlet channel and an outlet valve in the outlet channel, the inlet and outlet valves opening and closing the inlet and outlet channels in response to raising and lowering the diaphragms.
A dosing device comprising a micropump and a supply of a medicament, the micropump pumping the medicament from the supply;
- wherein the micropump includes a pump body including a fluid inlet channel, a fluid outlet channel and pumping reservoir, the fluid inlet channel and the fluid outlet channel communicating with the pumping reservoir,
- a diaphragm covering the pumping reservoir,
- a piezoelectric strip actuator attached to the diaphragm such that by applying a voltage to the actuator, the diaphragm can be raised or lowered relative to the pumping chamber,
- an inlet valve on the inlet channel and an outlet channel on the outlet channel, the valves opening and closing the inlet and the outlet channels in response to the raising and lowering of the diaphragm.
Dependencies are inferred from the claim text.