The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Dec. 06, 1983
Filed:
Aug. 12, 1981
Karoly Balazs, Budapest, HU;
Vladislav D Firstov, Moscow, SU;
Miklos Frcska, Budapest, HU;
Laszlo Gal, Balassagyarmat, HU;
Sandor Hlavay, Balassagyarmat, HU;
Lajos Huber, Budapest, HU;
Jozsef Korbuly, Budapest, HU;
Laszlo Mahig, Budapest, HU;
Juri F Ponomarenko, Moscow, SU;
Juri G Shein, Moscow, SU;
Ferenc Simon, Budapest, HU;
Kozponti Banyaszati Fejlesztesi Intezet, Budapest, HU;
Magyar Aluminiumipari Troszt, Budapest, HU;
Skotchinsky Institut Gornogo Dela, Moscow, SU;
Abstract
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.