Apparatus for a fish deterrent and guide
Patent 5730086 Issued on March 24, 1998. Estimated Expiration Date: 
April 2, 2017. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.
April 2, 2017. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.Patent References 4030063 Piston vibrator Acoustic fish behavioral control device Method and apparatus for controlling aquatic population in defined areas Fish behavior control system Underwater acoustic animal guidance system Infraacoustic/electric fish fence Underwater deterrent system Patent #: 5602799 InventorApplicationNo. 831221 filed on 04/02/1997US Classes:119/219, Fish diverter or barrier367/139Animal controlExaminersPrimary: Mancene, GeneAssistant: Abbott, Yvonne R. International ClassesA01K 061/00A01M 029/02 AbstractAn improved fish deterrent and guide utilizing generally a pneumatic oscillator (1) and oscillated plate (9), to generate water particle motion (low frequency sound or infrasound) and specifically water particle accelerations to which fish exhibit an avoidance response. The invention is reliable, reasonably portable and deployable, low-maintenance, and tunable to produce the desired water particle motion. Reliability is due to the piston (4) being cushioned by air at the end of each stroke and redirected without impacting the casing. The operation of the apparatus is easily verified from the water surface by inspection of the backpressure regulator (13). The apparatus is tunable through adjustment of the inlet pressure, backpressure, and size, shape, and mass of the oscillated plate. Adjustment of these items through a lab and field testing procedure produce water particle motion with the correct frequency, amplitude, and energy to guide fish to a desired location or prevent their entrance into potentially dangerous areas.Other References
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