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
Direct converting apparatus, method for controlling the same, and control signal generation device
Two dimensional magnetic sensor immune to skew angle misalignment
Microbial fuel cell and method of use
Method for automatically estimating inertia in a mechanical system
Method and system for controlled media sharing in a network
Tomlinson Harashima precoding with additional receiver processing in a multi-user multiple-input multiple-output wireless transmission system
Output device, source apparatus, television set, system, output method, program, and recording medium
  Randomly Featured Patents
Coating system with blade adjustment
Method of inducing vasorelaxation to treat pulmonary hypertension
Converting CO.sub.2 to an alcohol
Dichroic liquid crystal compositions made with asymmetric tris-azo dyes
Device for continuous thermal treatment of multidimensional sheet structures consisting of fibers made of polyacrylonitrile
Vending machine bill validator cover
Digital electrical computer system for determining a premium structure for insurance coverage including for counterclaim coverage
Polarization scrambler and integrated optical circuit making use thereof
Switched capacitor analog circuits using polysilicon thin film technology