Patent · US Active

Pressure limiting valve

US7559336B2 · kind B2 · utility

3Cited by

6References

9Claims

0Family size

Assignee

LuK Lamellen und Kupplungsbau Beteiligungs KG · DE

Inventors

Eric Muller · Contz-les-Bains, FR
Manfred Homm · Bühl, DE
Reinhard Stehr · Bogen, DE

Key dates

Filing date	May 9, 2007
Grant date	Jul 14, 2009
Priority date	—
Expiry date	May 9, 2027

Classification

Technology area (CPC Y)Emerging Cross-Sectional Technologies
CPC primaryY10T137/2562
WIPO fieldMechanical elements
WIPO sectorMechanical engineering

Abstract

A pressure limiting valve having a spool with raised spool lands. The spool is slidably received in a spool bore having inflow and outflow grooves that form control edges. The valve has two control edges, and a hydraulic resistance is connected in series with one of the control edges. Increasing static pressure losses at the control edges during flow, so-called flow forces, can be offset by an increasing back pressure on the valve spool, which is produced by the hydraulic resistance.

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