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US 4,877,351 AGranted
Apparatus for adjusting a water level of a lock
AssigneeBridgestone Corporation
InventorYasushi Enami
Life of this patent
Estimating the term…
Abstract
An apparatus for the adjustment of the water level in a lock comprises at least one fluid chamber arranged on a bottom or a bottom and a sidewall of a lock room between lock gates. The adjustment of the water level is performed by the supply and discharge of air in the fluid chamber through an air supply and discharge pipe.
Claims7
An apparatus for adjusting a water level of a lock, comprising:
- at least one collapsible fluid chamber arranged on a bottom of a lock room between lock gates in the lock, said fluid chamber comprising a parachute-like body made of a flexible sheet material fixed to the bottom of said lock room at peripheral edges thereof, means for supplying air into the fluid chamber to raise the water level in the lock room and wherein said fluid chamber is deflated by discharging air therein to lower the water level in the lock room.
Dependencies are inferred from the claim text.