Fish elevator and method of elevating fish

Patent · Sun Jan 01 00:00:00 EST 1984

OSTI ID:864874

Truebe, Jonathan ^[1]; Drooker, Michael S ^[2]

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1. Mirror Lake, NH
2. Sanbornville, NH

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.

• DOE Contract Number: AC07-80ID12207
• Assignee: Lakeside Engineering (Mirror Lake, NH)
• Patent Number(s): US 4431340
• OSTI ID: 864874
• Country of Publication: United States
• Language: English

Related Subjects

fish
elevator
method
elevating
means
transporting
water
comprises
tubular
lock
gated
entrance
below
level
enter
discharge
passage
upper
raising
crowder
pulled
upward
surface
float
gravitationally
flows
closed
filling
pumped
raise
caused
remaining
distance
introduction
air
pocket
underside
automatically
discharged
position
movement
aided
continuous
overflow
pipe
connected
deliver
selected
location
selected location
means comprises
means comprise
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