Kozponti Banyaszati Fejlesztesi Intezet

Banyaszati Kutato Intezet

Taurus Gumiipari Vallalat

Magyar Aluminiumipari Troszt

Skotchinksy Institut Gornogo Dela

Skotchinsky Institut Gornogo Dela

Jozsef Korbuly

Ferenc Simon

Zoltan Ilyes

Janos Nemeth

Laszlo Mahig

Sandor Mikes

Karoly Bole

Jozsef Bohnert

Sandor Nagy

Karoly Balazs

Vladislav D Firstov

Karoly Gombocz

Nikolai Tikhonovich Bogatirev

Bela Frituz

Zsolt Pap

Istvan Aufsatz

Alexandr Dmitrievich Ignatyev

Laszlo Branyi

Jevgeny Grigorievich Filianovich

Miklos Frcska

Alexandr Nikolaevich Merkulov

Laszlo Gal

Sandor Hlavay

Juri F Ponomarenko

Jury Filippovich Ponomarenko

Lajos Huber

Juri G Shein

Jozsef Baso

Karoly Szoke

Kalman Nagy

Jozsef Szatmari

Jury Gheorghievich Shein

Geza Krampe

The invention relates to a pressure limiting valve, mainly for hydraulic mine props, which has a working space with an inlet opening connected to a high-pressure space and an outlet opening connected to low-pressure space in the operative position of the valve, a displaceable first valve member engageable with a valve seat within this working space in the shut-off position of the valve, a spring pressing the first valve member to the valve seat and in a given case, a spring sustaining the valve seat, suitably a gas spring and in which according to the invention the first valve member has transfer passages ensuring communication between the inlet opening and the outlet opening in the open position of the valve, as well as second valve member provided with a frustoconical head facing the cover plate and having a stem loosely fitted in a guide bore formed in the first valve member which is formed with an annular axial flange surrounding the head of the second valve member which is concentrically arranged within this flange.

Pressure limiting valve, particularly for hydraulic mine props

A process for measuring the tightness of endless driving members, particularly straps, belts, chains, ropes etc. during operation, in the course of which a signal is displayed. First and second spaced markings are applied onto the driving member. Along the path of the driving member at least one sensing element is arranged and at a constant speed of the driving device the time elapsing between the passing of the first and the second markings before the sensing element is measured.

Process for measuring the tightness of endless driving means during

End fitting or armature for multi-channel hoses having a positioning plate and a guiding plate extending perpendicularly to the longitudinal axis of the hose and apertured to receive hose coupling elements. Means are provided for varying the axial spacing of the plates. A resilient element is disposed between the plates, a part of which seats in a groove formed in the internal surface of the end fitting when the plates are pulled towards each other under load.

End fitting for multi-channel hose

The invention concerns an advanceable shield support assembly for longwall mining. The assembly has a pivotable main roof cap housing a retractable and extensible auxiliary roof cap. Normally the main roof cap supports the roof and the auxiliary one is retracted. However, before the assembly is advanced, the auxiliary roof cap is extended to support the roof section between the working face and the front edge of the main roof cap. The movement of the auxiliary roof cap, and the force with which it engages the roof section, are controlled by cooperating guide tracks and track-engaging elements capable of exerting a wedging action.

Mining shield support apparatus

Growing community of inventors

Budapest, Hungary

Jozsef Korbuly