Patent · US Expired

Auxiliary walking mine support

US4175891A · kind A · utility

0Cited by

1References

15Claims

0Family size

Assignee

Bochumer Eisenhütte Heintzmann GmbH & Co. KG · DE

Inventors

Gerhard von Klinggraff · Neukirchen-Vluyn, DE
Peter Marr · Bochum, DE
Karlheinz Bohnes · Bochum, DE

Key dates

Filing date	Oct 10, 1978
Grant date	Nov 27, 1979
Priority date	—
Expiry date	Oct 10, 1998

Classification

Technology area (CPC E)Fixed Constructions
CPC primaryE21D23/0091
WIPO fieldCivil engineering
WIPO sectorOther fields

Abstract

A walking mine support unit has a pair of adjacent supporting frames each having a multi-partite sole plate and a multi-partite roof shield. The sole plate and roof shield of each frame are connected only at their respective leading and trailing ends, by hydraulic rams which permit the roof shields to be raised and lowered relative to the sole plates, and by four-bar linkages which permit length-wise displacement of the roof shields parallel and relative to the sole plates. A multi-section overshield is located above each of the roof shields and connected thereto by adjustable supports. An arrangement is provided for advancing the unit in stepwise manner.

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