Patent · US Expired

Protecting device for partial-cut cutting machines

US4591209A · kind A · utility

11Cited by

1References

9Claims

0Family size

Assignee

Voest-Alpine · AT

Inventors

Bernhard Droscher · Zeltweg, AT
Otto Schetina · Zeltweg, AT
Herwig Wrulich · Zeltweg, AT
Alfred Zitz · Zeltweg, AT

Key dates

Filing date	Dec 28, 1983
Grant date	May 27, 1986
Priority date	—
Expiry date	Dec 28, 2003

Classification

Technology area (CPC E)Fixed Constructions
CPC primaryE21C35/043
WIPO fieldCivil engineering
WIPO sectorOther fields

Abstract

For protecting partial-cut cutting machines from overload, a vibration sensor 7 is provided on the swivellable cutting arm 2 carrying rotatably supported cutting heads 6. The signals of the vibration sensor 7 are utilized in an electronic control 8 and used for controlling the pivotal drive of the cutting arm 2. The electronic control 8 has a threshold switch which is connected with an adjusting drive for varying the supply capacity of the hydraulic pump of the pivotal drive.

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