Flow control device for a fluid dispensing apparatus
US4801051A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Mar 26, 1984 |
| Grant date | Jan 31, 1989 |
| Priority date | — |
| Expiry date | Mar 26, 2004 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T74/18752
- WIPO fieldSurface technology, coating
- WIPO sectorChemistry
Abstract
An improved liquid dispensing apparatus having a micro-adjustment of the opening travel of a needle valve of the apparatus. This micro-adjustment comprises a sleeve-stop member which is axially movable but non-rotatable in the body of the apparatus. One end of the sleeve-stop member forms an end-stop to limit opening movement of the needle valve away from the valve seat. Screw threads of a first pitch are formed on an external portion of the sleeve-stop member and internal screw threads of a second pitch different from the first pitch are formed on a portion of the apparatus body. A generally tubular adjustment screw element is engaged with both the internal scew threads of the body bore and the external screw threads of the sleeve-stop member so that rotation of the adjustment screw element causes differential axial movement of the sleeve-stop member for fine adjustment of the maximum opening needle valve travel.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.