Patent · US Expired

Control system for hydraulic presses comprising a plurality of press rams

US3945206A · kind A · utility

7Cited by

3References

5Claims

0Family size

Assignee

Ruthner Industrieanlagen-Aktiengesellschaft · AT

Inventor

Alfred Krause · Speyer, DE

Key dates

Filing date	Mar 24, 1975
Grant date	Mar 23, 1976
Priority date	—
Expiry date	Mar 24, 1995

Classification

Technology area (CPC F)Mechanical Engineering; Lighting; Heating
CPC primaryF15B3/00
WIPO fieldMachine tools
WIPO sectorMechanical engineering

Abstract

A control system for hydraulic presses comprising a plurality of press rams, an intensifier having a primary chamber which is connected by a supply conduit to a pump, and a valve which is associated with the primary chamber and when open permits the liquid under pressure to return through a return conduit into a reservoir, the primary chamber being constantly supplied by the pump with high-pressure liquid at a constant rate, and the valve associated with the primary chamber being controlled to move in synchronism with the reciprocating motion of the press rams so that it is closed during the forward stroke and open during the return stroke of the press rams.

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