| Patents for E21D 15 - Props; Chocks (3,432) |
|---|
| 02/26/2014 | CN103603681A Support separation wall and construction method thereof |
| 02/20/2014 | US20140050538 Prop |
| 02/19/2014 | EP2698500A2 Prop |
| 02/19/2014 | CN203441511U Frame type hydraulic bracket loading platform |
| 02/19/2014 | CN203441510U Novel double-control spray water valve for hydraulic support of fully mechanized mining of coal mine |
| 02/19/2014 | CN203441509U Novel large-flow hydraulic control one-way valve |
| 02/19/2014 | CN103590841A Supporting method for primary support of underground excavated chamber |
| 02/12/2014 | CN203430539U Combined guiding type hydraulic support entrucking sliding plate |
| 02/12/2014 | CN203430538U Self-moving platform for dismantling support from undercarriage |
| 02/12/2014 | CN203430537U High-strength single hydraulic prop head |
| 02/12/2014 | CN203430536U Filling support punning mechanism with outer limiting device |
| 02/12/2014 | CN203430535U Single-body hydraulic pillar three-way valve fly-out proofing device |
| 02/12/2014 | CN203428858U Hydraulic jacking device for locating hydraulic support top beam cover plate |
| 02/05/2014 | CN203420720U Revolving platform hydraulic cylinder integrated lifting mechanism |
| 02/05/2014 | CN203420719U Magnetic sealing single hydraulic prop |
| 02/05/2014 | CN203420718U Hydraulic support emulsion extra-high pressure conveying connector special for mine |
| 02/05/2014 | CN203420717U Single hydraulic prop for thin coal seam |
| 02/05/2014 | CN203420716U High-load single hydraulic column |
| 02/05/2014 | CN103562497A Preloadable support |
| 02/05/2014 | CN103557017A Impact-resistance and energy-absorption lengthening bar for single prop |
| 02/05/2014 | CN103557016A Multi-stage anti-impact supporting column |
| 02/05/2014 | CN103557015A Multi-expansion hydraulic support column |
| 02/05/2014 | CN102410032B PVC (Polyvinyl Chloride) prop shoe and manufacturing technology |
| 01/30/2014 | WO2014018992A2 Blast shield for mine roof supports |
| 01/29/2014 | CN203412601U Large stand column disassembling machine |
| 01/29/2014 | CN203412600U Hydraulic bracket of automatic loading and guniting platform |
| 01/29/2014 | CN203412599U Stretchable constant-resistance bracket for similarity simulation test |
| 01/29/2014 | CN103541748A Flushing preventing valve with single hydraulic prop |
| 01/29/2014 | CN103541747A Flower-shape thin-wall energy-absorption erosion-prevention shoring device |
| 01/29/2014 | CN103541746A Energy absorbing and impact resisting back plate of support |
| 01/22/2014 | CN203403897U Reversible lock |
| 01/22/2014 | CN203403896U Permanent supporting type single prop |
| 01/22/2014 | CN203403895U U-type steel support ceiling storage rack |
| 01/22/2014 | CN203403894U Adjustable rectangular support structure |
| 01/22/2014 | CN103527227A Method for withdrawing fully-mechanized coal mining hydraulic support |
| 01/22/2014 | CN103527226A Steeply inclined seam working face shielding and retracing method |
| 01/22/2014 | CN103527225A Mining fully-mechanized coal mining face hydraulic support installation method |
| 01/22/2014 | CN103527224A Hydraulic support and control valve thereof |
| 01/22/2014 | CN103527223A Mine single hydraulic prop capable of extending and retracting oppositely |
| 01/16/2014 | WO2014008715A1 Hinged-connection type suspended hydraulic stand column |
| 01/15/2014 | CN203399215U Mining communication device, hydraulic support and mining wireless communication system |
| 01/15/2014 | CN203395392U Integral steel-die moving support for ditch cable troughs |
| 01/15/2014 | CN203394550U Clamp type hydraulic support pillar base |
| 01/15/2014 | CN203394549U Special handcart for transporting hydraulic props |
| 01/15/2014 | CN203394548U Tilting preventing device of single hydraulic prop |
| 01/15/2014 | CN203394547U Hydraulic prop for improving sealing reliability of piston |
| 01/15/2014 | CN203394546U Limiting mobile column for steel cable baffle ring |
| 01/15/2014 | CN103510972A Pillar connecting device |
| 01/15/2014 | CN103510970A Valve element assembly of reversing valve for fully-mechanized coal mining hydraulic support |
| 01/15/2014 | CN103510969A Concrete-filled steel tube support continuously progressive pressure yielding contractible device and application method thereof |
| 01/15/2014 | CN102425431B Ultra-close coal layer mining roadway distributing method |
| 01/09/2014 | WO2014005656A1 An arrangement for protection of hydraulic actuators of underground shield from dynamic overload with a mechanical rotary absorber |
| 01/08/2014 | CN203383838U Pressure ratio and deformation tracking exposition-proof column |
| 01/08/2014 | CN203383837U Core shaft type flexible guide single hydraulic prop |
| 01/08/2014 | CN203383836U Anti-leakage column |
| 01/08/2014 | CN102140923B Guide ring overwelding seam large-cylinder bottom double-telescopic upright column |
| 01/01/2014 | CN203374290U Device for draining liquid out of mine hydraulic support |
| 01/01/2014 | CN203374289U Supporting and protecting pull rod connecting structure |
| 01/01/2014 | CN203374288U Single hydraulic prop capable of preventing liquid leakage |
| 01/01/2014 | CN203374287U Low-self-weight single hydraulic prop |
| 01/01/2014 | CN203374286U Individual hydraulic prop external liquid injection system |
| 01/01/2014 | CN203373752U Large diameter steel support adjustable head |
| 01/01/2014 | CN103485806A Hydraulic support and side pushing mechanism thereof |
| 01/01/2014 | CN103485805A Structure of steel-bar concrete rack section, grouting port and air exhausting hole |
| 01/01/2014 | CN103485804A Concrete-filled steel tube support pressure-transfer component and installation method thereof |
| 01/01/2014 | CN103485803A Stop pin base, stop pin locking mechanism and hydraulic support |
| 01/01/2014 | CN103485802A Hydraulic support |
| 01/01/2014 | CN103485801A Roadway support device for dynamic pressure roadway and retaining roadway along goaf |
| 01/01/2014 | CN102644464B Constructing method for mining embedded artificial boundary ore pillar from open-pit to underground mine |
| 01/01/2014 | CN102072219B Quickly loading booster cylinder and high-flow safety valve test device using same |
| 12/25/2013 | CN203362188U Drum-shaped supercharging multi-ring compound sealing handle |
| 12/25/2013 | CN203362187U Handle cover of integrated plug-in hand-directional valve |
| 12/25/2013 | CN203362186U Main valve body of overall plug-in hand-directional valve |
| 12/25/2013 | CN203362185U Hydraulic prop capable of monitoring pressure changes |
| 12/25/2013 | CN103470283A Novel upright assembling and disassembling device for upright columns of hydraulic support |
| 12/25/2013 | CN103470282A Integrally-inserted conical sealing reversal valve |
| 12/25/2013 | CN103470281A U-shaped pull rod of coal road shed support |
| 12/25/2013 | CN103470280A Dismountable top beam hydraulic support frame for coal mine |
| 12/25/2013 | CN103470279A U-shaped steel bracket capable of actively controlling deformation of surrounding rocks |
| 12/25/2013 | CN103470278A Rectangular-section steel-encased concrete support |
| 12/25/2013 | CN103470277A Hollow steel tube concrete support |
| 12/25/2013 | CN103470276A Hollow-pipe concrete support |
| 12/25/2013 | CN102518457B Emulsified liquid box for hydraulic support general assembly workshop |
| 12/25/2013 | CN101832137B Pre-embedding method for coal seam roof strut |
| 12/19/2013 | WO2013188321A1 Yieldable mine roof support |
| 12/19/2013 | US20130336728 Preloadable support |
| 12/19/2013 | US20130336727 Yieldable mine roof support |
| 12/18/2013 | CN203347811U Inserted mass flow balance reversible lock |
| 12/18/2013 | CN203347810U High-corrosion resistant single hydraulic supporting column |
| 12/18/2013 | CN203347809U Mining supporting device capable of preventing impact through constant-resistance yielding energy absorption |
| 12/18/2013 | CN103452571A Mining spherical-camera instrument set video surveillance system provided with holder and used for coal face |
| 12/18/2013 | CN103452570A Mining cage type anti-shocking ground pressure component |
| 12/18/2013 | CN102330560B Mine hydraulic support stand column with tight-pressing resistance device |
| 12/11/2013 | CN203335099U Combined seal safety valve with rated flow of 125 L/min |
| 12/11/2013 | CN203335098U Tilting-prevention belt for preventing individual hydraulic prop from tilting |
| 12/11/2013 | CN203335097U Pneumatic beam lifting device for mining |
| 12/11/2013 | CN103437794A Hydraulic steering platform |
| 12/11/2013 | CN103437793A Integral spring return plug-in type hand-operated reversing valve |
| 12/11/2013 | CN102011595B Coal rock tunnel impact retraction energy-absorbing support device |
| 12/04/2013 | CN203321551U Bracket for supporting and protection |