Dispenser and method for dispensing viscous fluids
US5699934A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jan 29, 1996 |
| Grant date | Dec 23, 1997 |
| Priority date | — |
| Expiry date | Jan 29, 2016 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF04B2201/0201
- WIPO fieldEngines, pumps, turbines
- WIPO sectorMechanical engineering
Abstract
A dispenser includes a viscous fluid feed cavity and dispense cavity with an intermediate passageway therebetween and a diaphragm mounted for reciprocatory movement so positioned that during the dispensing process, the movable diaphragm is moved between a first position wherein the passageway is opened, a second position to close the passageway, and a third position to affect viscous fluid dispensing through an outlet coupled to the dispensing cavity. A diaphragm position sensor is provided for determining the relative position of the movable portion of the diaphragm, the sensor being functionally coupled to the diaphragm actuator, such that the diaphragm actuator is controllable in accordance with the relative position of the diaphragm to insure accurate control of micro quantities of viscous fluid dispensed from the dispenser.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.