Patent · US Active

Screed for road finishing machine

US8353642B2 · kind B2 · utility

5Cited by

12References

10Claims

0Family size

Assignee

Joseph Voegele AG · DE

Inventors

Roman Munz · Mannheim, DE
Martin Buschmann · Neustadt, DE
Achim Eul · Mannheim, DE

Key dates

Filing date	Oct 19, 2010
Grant date	Jan 15, 2013
Priority date	—
Expiry date	Jan 8, 2031

Classification

Technology area (CPC E)Fixed Constructions
CPC primaryE01C2301/20
WIPO fieldCivil engineering
WIPO sectorOther fields

Abstract

In a screed with a basic screed and at least one extendable screed movable relative to the basic screed with a hydraulic cylinder and an electro-hydraulic control comprising a magnet-actuated directional control valve for at least controlling the direction of the hydraulic cylinder, the directional control valve for changing the rate of motion of the hydraulic cylinder is guided by an operator or automatically and is a proportional directional control valve (W) with proportional-electric direct actuation or proportional-electric-hydraulic pilot control. The proportional directional control valve for the hydraulic cylinder is connected on the actuation side with an electro-hydraulic control of a hydraulic system of the road finishing machine.

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