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Tipper with grab loader

A grab is a mechanical device with two or more jaws (also called clamshells), used to pick things up or to capture things. Some types include:

  • Roundnose grab
  • Clamshell grab
  • Orange-peel grab
    • in Dutch they are called poliep grijpers = "polyp grabs".

There are different ways of open/close the grabs:

  • electro-hydraulic / diesel-hydraulic
  • mechanical by rope(s) (1-rope, 2-ropes, 3-ropes, 4-ropes)

Usage

Grabs can be used for:

  • dredging & gravel pits
  • bulk handling (e.g. loading/unloading ships)
  • salvage (e.g. ship-wrecks, oil)
  • excavation (e.g deep shafts)
  • street works (e.g Lorry loader grabs)

Manufacturers

The British firm of Priestman stated building grabs for dredging in the late 19th century and then developed a range of Draglines and Front Shovel Excavator and Cranes to operate them.

See also

External images



Smallwikipedialogo.png This page uses some content from Wikipedia. The original article was at Grab. The list of authors can be seen in the page history. As with Tractor & Construction Plant Wiki, the text of Wikipedia is available under the Creative Commons by Attribution License and/or GNU Free Documentation License. Please check page history for when the original article was copied to Wikia



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