Patent · US Active

Dynamic lip seal and moveable seal recess for pressure balance control of electrically operated valve

US10119626B2 · kind B2 · utility

1Cited by

8References

6Claims

0Family size

Assignee

Rausch & Pausch GmbH · DE

Inventors

Herwig Greiner · Neuenmarkt, DE
Werner Schieweck · Thierstein, DE

Key dates

Filing date	Jul 27, 2016
Grant date	Nov 6, 2018
Priority date	—
Expiry date	Aug 3, 2036

Classification

Technology area (CPC H)Electricity
CPC primaryH01F7/1607
WIPO fieldMechanical elements
WIPO sectorMechanical engineering

Abstract

An electromagnetically or electrically operated valve possesses a closing element that is axially displaceable between a closed position and an open position. The closing element is pressure-compensated, by the pressure present on the front side of the closing element being passed to the back side thereof. Between the front and back sides the closing element is sealed radially against a surrounding structural element by means of a dynamic seal. The circumferential sealing gap varies in width in dependence on the axial position of the closing element, so that the dynamic seal seals reliably only in the closed position, while in other positions the static friction of the dynamic seal is reduced.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.