POWERED SUPPORT SECTION Russian patent published in 2007 - IPC E21D23/00 

FIELD: mining, particularly mine roof supports for step-by-step movement, for instance in combination with provisions for shifting of conveyers, mining machines, or guides therefore.

SUBSTANCE: powered support section comprises support, thrust hydraulic jack, the first and the second rocking arms, connecting rod and railing member hinged to support correspondingly. One end of connecting rod is pivotally attached to supporting member. Railing member is hinged to the first and the second rocking arms correspondingly. Piston shaft of thrust hydraulic jack is directly pivotally connected to supporting member. Another end of connecting rod is hinged to the first rocking arm of railing member.

EFFECT: increased working place volume and prevention of hydraulic jack shaft deflection.

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