Fish elevator and method of elevating fish

Details Fish elevator and method of elevating fish Fish elevator and method of elevating fish

1981-08-12

1984-02-14

Corbin, David H.

Hydraulic and earth engineering

Fluid control, treatment, or containment

Flow control

405 96, E02B 808

Patent

active

044313403

ABSTRACT:
A means and method for transporting fish from a lower body of water to a higher body of water. The means comprises a tubular lock with a gated entrance below the level of the lower body of water through which fish may enter the lock and a discharge passage above the level of the upper body of water. The fish raising means in the lock is a crowder pulled upward by a surface float as water from the upper body of water gravitationally flows into the closed lock filling it to the level of the upper body. Water is then pumped into the lock to raise the level to the discharge passage. The crowder is then caused to float upward the remaining distance through the water to the level of the discharge passage by the introduction of air into a pocket on the underside of the crowder. The fish are then automatically discharged from the lock into the discharge passage by the out of water position of the crowder. The movement of the fish into the discharge passage is aided by the continuous overflow of water still being pumped into the lock. A pipe may be connected to the discharge passage to deliver the fish to a selected location in the upper body of water.

REFERENCES:
patent: 1591450 (1926-07-01), Wheeler
patent: 1680722 (1928-08-01), Bennett et al.
patent: 2102629 (1937-12-01), Knerr
patent: 3377805 (1968-04-01), Warner

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