Piezoelectric dispenser with a longitudinal transducer and replaceable capillary tube
US11148164B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jul 24, 2015 |
| Grant date | Oct 19, 2021 |
| Priority date | — |
| Expiry date | Jul 24, 2035 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB01L2400/0481
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
A dispenser and methods for transferring liquids are disclosed. The dispenser may include a capillary tube with tip having an aperture, a piezoelectric actuator coupled to the capillary tube at a location. Actuation of the piezoelectric actuator causes a pressure wave to propagate along the capillary tube toward the tip such that radial motion at the location is transmitted as distally extending axial motion of the tip, thereby causing a droplet of a predetermined volume to be ejected from the aperture. In some embodiments, the capillary tube has a modulus of elasticity in a range which dampens acoustical noise from the actuation and provides single drop stability over a range of drop sizes.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.