Patent · US Expired

Hydraulically controllable globe valve

US6491007B1 · kind B1 · utility

8Cited by

4References

7Claims

0Family size

Assignee

Daimlerchrysler AG · US

Inventors

Michael Kübel · Karlsruhe, DE
Knud Lembke · Karlsruhe, DE
Ulrich Letsche · Stuttgart, DE
Rudolf Thom · Stuttgart, DE

Key dates

Filing date	Nov 19, 1999
Grant date	Dec 10, 2002
Priority date	—
Expiry date	Nov 19, 2019

Classification

Technology area (CPC Y)Emerging Cross-Sectional Technologies
CPC primaryY10S137/906
WIPO fieldEngines, pumps, turbines
WIPO sectorMechanical engineering

Abstract

A hydraulically controllable globe valve having a stem piston to which pressure can be applied by a spring connected to a pressure source, with the stem piston being able to move from a first end position in the direction of a second end position. Pressure control means are provided which maintain a constant pressure of the hydraulic spring means on the stem piston while the latter moves from the first end position in the direction of the second end position by connecting the hydraulic spring means to a pressure source during a variable portion of the valve lift. The valve can be used, for example, as a gas exchange valve in a reciprocating engine.

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