Resources Contact Us Home
Prefabricated portable tornado shelter

Image Number 3 for United States Patent #6151841.

An inexpensive, prefabricated portable tornado shelter is disclosed. The shelter is assembled from four equilateral triangular sides, a base frame, and a floor, to form a square pyramid-shaped enclosure with latched doors and PLEXIGLAS windows. The shelter allows constant air pressure equalization between its interior and exterior. The shelter is held firmly to the ground with four auger bolts.

  Recently Added Patents
Aircraft drive
Containers having radio frequency identification tags and method of applying radio frequency identification tags to containers
Polymer composites having highly dispersed carbon nanotubes
Gateway channel utilization
Prevention and reduction of blood loss
Optical modulator module
Bioelectric battery for implantable device applications
  Randomly Featured Patents
Method and apparatus for document management utilizing a messaging system
Channel assignment based on spatial strategies in a wireless network using adaptive antenna arrays
Retinoid-like compounds
System and methods for actuating reversibly expandable structures
Bearingless generator and rotary machine combination
Apparatus and method for separating and concentrating fluids containing multiple components
Throttleable rocket injector assembly
Communication method, related buffering element and line termination element
Water closet tank
Light-emitting diode array