Resources Contact Us Home
Self-propelled shark-proof cage

Image Number 3 for United States Patent #4166462.

The invention relates to a self-propelled shark-proof cage which is provided with at least one access opening and a propeller mounting frame having pivot means coupling it to the cage so that the propeller mounting frame is pivotal about two axes at right angles to each other, and the propeller mounting frame carries on it an air motor and a propeller. The frame is provided with buoyancy means so that it can be made to be of approximately the same gravity as sea-water, and the air motor is driven by compressed air so that the cage can be propelled through the water, thereby enabling abalone divers to collect abalone without fear of predators and, beacause of less exertion, for longer periods of time.

  Recently Added Patents
Method for producing SOI substrate and SOI substrate
Character input device and program for displaying next word candidates based on the candidates' usage history
Smooth silicon-containing films
Memory device and semiconductor device
Digital media content distribution
Mobile communication device and method for providing positioning information
High voltage circuit for electrical stimulation
  Randomly Featured Patents
Height adjustment for a front mount mower
Width adjustable substrate support for plasma processing
Method for inhibiting the deposition of organic contaminants in polp and papermaking processes
Jacket construction and method of making a jacket
Hardware multiprocess scheduler in a graphics rendering processor
Alkylation aide for sulfuric acid catalyzed alkylation units
Semiconductor laser device
Apparatus and method for applying labels onto small cylindrical articles using improved film feed and cutting system
Imidazopyridine derivatives and their use
Screen printing apparatus with stroke control