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The working principle of a hydraulic jack. In 1838 William Joseph Curtis filed a British patent for a hydraulic jack. [4] In 1851, inventor Richard Dudgeon was granted a patent for a "portable hydraulic press" – the hydraulic jack, a jack which proved to be vastly superior to the screw jacks in use at the time. [5]
When fully contracted for travel, the truck measures 11.2 metres (37 ft) in length, 2.55 metres (8.4 ft) in width, and 4 metres (13 ft) in height. There are four leveling jacks, and the second floor expands upwards, both via hydraulic mechanisms, bringing the expanded height to 6.5 metres (21 ft).
Both the 28 foot model (2810/2830) as well as the 26 foot model offered the Electro-Majic bed as an option as both already had rear sleeping quarters. It was during this model year that Safari also introduced the "Pathmaker Edition" trim line. The Pathmaker Edition came with a patio awning, hydraulic levelers, solar inverter, and air horn.
Dock plates and dock boards are generally portable; dock levelers and lifts are generally permanent fixtures. [2] Dock plates and dock boards are simply metal ramps which bridge the gaps between dock and truck. [4] Dock plates are generally made out of aluminium whilst dock boards are generally made out of steel for greater strength.
Land Rover developed a self-levelling rear suspension using the "Boge Hydromat" self-energising hydraulic strut. [13] Of similar construction to a hydraulic shock absorber the strut used the motion of the suspension travelling over bumps to pump itself back up to a pre-set height. It was sufficiently powerful to regain up to 85% of normal ride ...
Animation of a strand jack. Strand jacks can be used horizontally for pulling objects and structures, and are widely used in the oil and gas industry for skidded loadouts. Oil rigs of 38,000 t have been moved in this way from the place of construction on to a barge. Since multiple jacks can be operated simultaneously by hydraulic controllers ...
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