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Movable defensive apparatus

  • US 20020083651A1
  • Filed: 12/26/2001
  • Published: 07/04/2002
  • Est. Priority Date: 12/27/2000
  • Status: Active Grant
First Claim
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1. A movable defensive apparatus comprising a defensive wall disposed in the vicinity of a doorway of a site such as a house and an installation or in the vicinity of a doorway, a window or the like of a building for preventing rainwater and illegal object such as a mob and a runaway vehicle from entering the site or the building;

  • and a drive device for driving the defensive wall from a storage position to a predetermined position along a guide device, wherein said drive device comprises a piston cylinder unit which is operated by water pressure such as running water and reserved water.

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