Liquid dosage piston pump
US4336000A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Dec 31, 1979 |
| Grant date | Jun 22, 1982 |
| Priority date | — |
| Expiry date | Dec 31, 1999 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF04B53/06
- WIPO fieldEngines, pumps, turbines
- WIPO sectorMechanical engineering
Abstract
The invention relates to a method of removing air or gas bubbles tending to collect in the "dead space" of a piston burette or another liquid dosage piston pump during operation thereof. The venting is performed by sucking a substantial volume of air into the pump cylinder in addition to a certain amount of liquid, and the air and part of the liquid within the pump cylinder is thereafter discharged therefrom. A piston dosage pump for carrying out this method comprises a valve mechanism by means of which the pump cylinder may be selectively communicated not only with a liquid inlet conduit and a liquid outlet conduit, but also with an air inlet passage.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.