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Actuation means for the racking platform of a mast

Static structures (e.g. – buildings) – Mechanism operated relatively movable shaft assembly – Longitudinally extensible by flexible drive or hoist
Patent

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Angle drilling apparatus

Static structures (e.g. – buildings) – Mechanism operated relatively movable shaft assembly – Tilts relative to base
Patent

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Angle drilling apparatus

Static structures (e.g. – buildings) – Mechanism operated relatively movable shaft assembly – Tilts relative to base
Patent

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Angular adjustment for drill rig mast

Static structures (e.g. – buildings) – Mechanism operated relatively movable shaft assembly – Tilts relative to base
Patent

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Apparatus for erecting a mast

Static structures (e.g. – buildings) – Mechanism operated relatively movable shaft assembly – Fluid pressure actuated
Patent

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Arrangement at self expanding booms

Static structures (e.g. – buildings) – Mechanism operated relatively movable shaft assembly – Fluid pressure actuated
Patent

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Arrangement for erecting and dismounting an elongate object havi

Static structures (e.g. – buildings) – Mechanism operated relatively movable shaft assembly – Tilts relative to base
Patent

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Articulated aerial boom and an elbow linkage assembly therefore

Static structures (e.g. – buildings) – Mechanism operated relatively movable shaft assembly – Moves about vertical axis
Patent

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Assembly positioning a crane on a platform installed in the sea

Static structures (e.g. – buildings) – Mechanism operated relatively movable shaft assembly
Patent

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Automatic color guard flagpole

Static structures (e.g. – buildings) – Mechanism operated relatively movable shaft assembly
Patent

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Automatic swinging and locking apparatus and method

Static structures (e.g. – buildings) – Mechanism operated relatively movable shaft assembly – Moves about vertical axis
Patent

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Boom articulating mechanism for aerial devices

Static structures (e.g. – buildings) – Mechanism operated relatively movable shaft assembly – Tilts relative to base
Patent

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Boom swing control device and assembly

Static structures (e.g. – buildings) – Mechanism operated relatively movable shaft assembly – Moves about vertical axis
Patent

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Boom with mast assembly

Static structures (e.g. – buildings) – Mechanism operated relatively movable shaft assembly – Moves about vertical axis
Reexamination Certificate

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Bottom brace for crane

Static structures (e.g. – buildings) – Mechanism operated relatively movable shaft assembly – Tilts relative to base
Patent

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Box truss hoop

Static structures (e.g. – buildings) – Mechanism operated relatively movable shaft assembly
Patent

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Cable sling arrangement for pivoting a drilling mast and drawwor

Static structures (e.g. – buildings) – Mechanism operated relatively movable shaft assembly – Tilts relative to base
Patent

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Cantilevered mast drilling rig with single step erection

Static structures (e.g. – buildings) – Mechanism operated relatively movable shaft assembly – Tilts relative to base
Patent

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Carrier track assembly for extensible and retractable boom machi

Static structures (e.g. – buildings) – Mechanism operated relatively movable shaft assembly – Tilts relative to base
Patent

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Center guided crane boom

Static structures (e.g. – buildings) – Mechanism operated relatively movable shaft assembly – Tilts relative to base
Patent

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