Needle valve nozzle with a needle guide
US5811140A · kind A · utility
Inventor
Key dates
| Filing date | Jan 27, 1997 |
| Grant date | Sep 22, 1998 |
| Priority date | — |
| Expiry date | Jan 27, 2017 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB29C2045/2889
- WIPO fieldOther special machines
- WIPO sectorMechanical engineering
Abstract
A needle valve nozzle (1) with a nozzle housing (3), a needle valve (10) arranged axially displaceably in it in the center, and a needle guide (4) constructed as a bushing, has its material feed channel (5) completely in the interior of this needle guide (4). The needle guide (4) has a corresponding radial dimension on the face (11) of the needle valve nozzle (1) and of the nozzle housing (3), and jointly forms the face (11). It is furthermore provided that this bushing-like needle guide (4) has an insulating spacing from nozzle housing (3), in particular on its exterior, preferably with the aid of an air gap, so that a heat outflow though the nozzle housing (3) and its abutment (16) is largely ruled out.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.