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40 Inventive Principles
Pneumatic and Hydraulic Constructions

a) Replace solid parts of an object by gas or liquid. These parts can use air or water for inflation, or use air or hydrostatic cushions.

b) Use negative pressure, partial vacuum and vacuum.
 

EXAMPLE:
  1. A system of high-power fans can create an airflow that acts as an invisible roof, which can cover an area the size of a football-field shielding it from rain and snow.
  2. Air-filled ‘bubble-wrap’ or other expanded-foam material stabilize and protect goods of any shape in a transport container during shipping.
  3. Individuals suspected of having suffered spinal damage are transported to hospital on evacuated mattresses filled with small balls. Details