PIEZOELECTRIC ACTUATION OF PISTON WITHIN DISPENSING CHAMBER
First Claim
1. A fluid dispenser comprising:
- a housing for defining an essentially cylindrical fluid chamber, the housing comprising an orifice;
a piston positioned in the housing for linear motion in the chamber for expelling fluid from the chamber and through the orifice;
a piezoelectric actuator assembly at least partially positioned in the housing for imparting the linear motion to the piston.
2 Assignments
0 Petitions
Accused Products
Abstract
A fluid dispenser (20) comprises a housing (22) for defining a fluid chamber (24). The housing (22) has an orifice (26) through which fluid is discharged. A piston (28) is positioned in the housing (22) for linear motion in the chamber for expelling fluid from the chamber and through the orifice (26). A piezoelectric actuator assembly (30) is positioned in the housing for imparting the linear motion to the piston. In one example implementation, the fluid dispenser housing takes the form of a syringe. In the syringe implementation, a syringe housing defines an essentially cylindrical fluid chamber. In an example embodiment, the piezoelectric actuator assembly (30(4)) comprises a first piezoelectric actuator (501); a second piezoelectric actuator (502); and, a circuit (34(4)) for actuating the first piezoelectric actuator (501) and the second piezoelectric actuator (502).
90 Citations
20 Claims
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1. A fluid dispenser comprising:
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a housing for defining an essentially cylindrical fluid chamber, the housing comprising an orifice;
a piston positioned in the housing for linear motion in the chamber for expelling fluid from the chamber and through the orifice;
a piezoelectric actuator assembly at least partially positioned in the housing for imparting the linear motion to the piston. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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11. A syringe for dispensing a fluid comprising:
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a syringe housing for defining an essentially cylindrical fluid chamber, the housing having an orifice;
a piston positioned in the housing for linear motion in the chamber for expelling fluid from the chamber and through the orifice;
a piezoelectric actuator assembly positioned in the housing for imparting the linear motion to the piston. - View Dependent Claims (12, 13, 14, 15, 16, 17, 18, 19, 20)
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Specification