EP 0340464 A3 19900829 - MATERIAL BED ROLLER MILL
Title (en)
MATERIAL BED ROLLER MILL
Publication
Application
Priority
DE 3815002 A 19880503
Abstract (en)
[origin: US4973001A] The invention relates to a material bed roller mill with a fixed roller and a floating roller which between them form a grinding gap and a hydraulic-pneumatic spring system which presses the floating roller in the direction of the fixed roller and contains at least one hydraulic working cylinder and a working pneumatic spring which cooperates therewith for each side of the floating roller. The spring container of each working pneumatic spring is divided by two movable pistons into a central gas filling chamber and two opposing hydraulic fluid chambers, and a stroke measuring device is associated with one piston for the preliminary filling pressure of the hydraulic fluid. In this way it is possible to reset the grinding force during operation by means of the hydraulic pressure with the same pneumatic spring characteristic on both sides of the floating roller.
IPC 1-7
IPC 8 full level
B02C 4/32 (2006.01)
CPC (source: EP US)
B02C 4/32 (2013.01 - EP US)
Citation (search report)
- [A] US 3938732 A 19760217 - SCHRIMPER VERNON L, et al
- [A] US 2765731 A 19561009 - EDWARDS JOSEPH N
Designated contracting state (EPC)
DE ES FR GB IT
DOCDB simple family (publication)
EP 0340464 A2 19891108; EP 0340464 A3 19900829; EP 0340464 B1 19920930; DE 3815002 A1 19891116; DE 58902351 D1 19921105; ES 2035405 T3 19930416; US 4973001 A 19901127; ZA 892690 B 19891227
DOCDB simple family (application)
EP 89105932 A 19890405; DE 3815002 A 19880503; DE 58902351 T 19890405; ES 89105932 T 19890405; US 33738789 A 19890413; ZA 892690 A 19890413