Resources Contact Us Home
Browse by: INVENTOR PATENT HOLDER PATENT NUMBER DATE
 
 
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
Minimizing mismatch during compensation
Method and apparatus for providing auto-completion of information
UV liquid treatment system
Methods and apparatus for ultrasonic cleaning
Method and device for reducing image color noise
Method for identifying bacteria in a sample
Biomedical electro-stimulator
  Randomly Featured Patents
Use of server instances and processing elements to define a server
Surgical suture having an ultrasonically formed tip, and apparatus and method for making same
Color conversion device for applying clipping to color values outside a color reproduction range and which satisfy a predetermined condition
Ink cartridge identifying apparatus
Composite article made from used or surplus corrugated boxes or sheets
Aircraft/pylon multi-contact electrical connector
Energy-absorbing deformation system
Method for improving the efficiency of weighted random pattern tests through reverse weight simulation using effective pattern masks
Magnetorheological fluids with an additive package
Nucleic acid detection device