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NL8302006A
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Lifting equipment with compensated hoist.
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NL8105927A
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Pumped oil production well has pump body near well bottom - reciprocated by hydraulic cylinder with controlled frequency and stroke
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NL8105929A
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Hydraulic piston-cylinder unit - has main cylinder contg. hollow main piston acting as cylinder for fixed second piston
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NL8105928A
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Pumped oil prodn. well has pump body near well bottom - reciprocated via fibre-reinforced plastic cable which may act as signal line
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NL7705103A
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Device for hanging a load from a vessel under the waterline.
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NL7705104A
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Hydraulic installation for arming and moving a torque and cutter piston with such a hydraulic installation.
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NL7700188A
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Device for hydraulic or pneumatic driving and braking of a tool.
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GB1479559A
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Hydraulic traction cylinder
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