Servo-controlled magnetic valve
US6293513A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Jun 14, 2000 |
| Grant date | Sep 25, 2001 |
| Priority date | — |
| Expiry date | Jun 14, 2020 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF16K31/408
- WIPO fieldMechanical elements
- WIPO sectorMechanical engineering
Abstract
A servo-controlled magnetic valve has a main valve (13) and a servo valve (14). The servo valve opens when, after an empty stroke, a solenoid plunger (7) entrains a slide member (23) that carries the servo closure member (20) and, as a result, pressure is released to the low pressure side (17) from a pressure chamber (25) on the side of the servo piston (24) that is remote from the main valve seat (15). The servo piston (24) is an annular piston that surrounds an insert (19) that carries the main valve closure member (18) and the servo valve seat (20) and which, during the operating stroke, entrains the slide member (23) by means of first stops (26) and the insert (19) by means of second stops (28). In that manner, it is possible to obtain sufficient opening of the main valve (13) and a small overall height of the magnetic valve while retaining an initial empty stroke of the solenoid plunger (7).
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.