Patent · US Expired

Flow regulating apparatus for a fluid, in particular a pneumatic choke valve

US6802487B2 · kind B2 · utility

8Cited by

3References

4Claims

0Family size

Assignee

Demag Cranes & Components GmbH · DE

Inventors

Jurgen Heun · Dortmund, DE
Markus Lobel · Witten, DE
Jorg Fuhrmann · Weisendorf, DE

Key dates

Filing date	Jul 24, 2002
Grant date	Oct 12, 2004
Priority date	—
Expiry date	Dec 8, 2022

Classification

Technology area (CPC F)Mechanical Engineering; Lighting; Heating
CPC primaryF16K3/24
WIPO fieldMechanical elements
WIPO sectorMechanical engineering

Abstract

A flow regulating apparatus for a fluid, in particular a pneumatic choke valve, includes a housing having an inlet port and an outlet port fluidly connected by a choke channel. A throttling piston is disposed in the choke channel for movement in longitudinal direction between an initial position and an end position. The throttling piston includes a tapered section to define with the choke channel an overflow passage whose cross section is dependent on a position of the throttling piston, wherein the tapered section is configured such that a movement of the throttling piston from the initial position to the end position results in a progressive increase of the cross section of the overflow passage.

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