Resources Contact Us Home
Spillway for discharging extraordinary floods at dams having at least two flood discharge structures

Image Number 8 for United States Patent #5195846.

For the purpose of providing a more economical alternative to conventional control gates for the quasi-permanent closure of all or part of the length of the overflow spillway of a dam except when discharging extraordinary floods, the invention consists of installing on the sill of the spillway a water level raising means comprising at least one heavy element, held by gravity on the sill, the water level raising means or its element being designed to overturn at a predetermined head corresponding to a headwater level not higher than the predetermined maximum water level in order to discharge extraordinary floods, smaller floods being discharged by a separate flood discharge structure.

  Recently Added Patents
Method for testing multi-chip stacked packages
Lightning-protective explosion-preventive fastener
Lettuce sister lines PX06514083, PX06514153, PX06514201 and PX06514204
Non-volatile memory array and device using erase markers
Demand based power allocation
Methods and apparatus for providing video on demand and network PVR functions using IP streaming
Shape memory polymers formed by self-crosslinking of copolymers
  Randomly Featured Patents
Sheet feeding apparatus with a constant friction torque generating mechanism
Novel flocked fabric
Memory access control apparatus
Nucleic acid fragments, chimeric genes and methods for increasing the methionine content of the seeds of plants
Bioprosthetic heart valve with polyphosphazene
Pin for connecting machine elements with each other
Oxide layer of variable thickness between word lines and bit lines of a memory device
Uses of monoclonal antibody 8H9
Pneumatic actuator