Hydraulic and earth engineering – Fluid control – treatment – or containment – Floatable matter containment
Patent
1987-09-16
1989-05-02
Taylor, Dennis L.
Hydraulic and earth engineering
Fluid control, treatment, or containment
Floatable matter containment
114 42, 188 83, 188335, 405211, 405217, E02B 1502
Patent
active
048263532
ABSTRACT:
A drag unit to absorb the kinetic energy from large floating bodies of ice is constructed around a buoyancy chamber (14). The buoyancy chamber is attached to a torque arm (16) and this is secured at its remote end to an anchor line (6). The buoyancy chamber supports a rotatable drag wheel (20) at either end. The drag wheels each have a plurality of sharp impeller blades on their outer surfaces. The drag wheels are impeded from rotation by brakes (40) attached to the buoyancy chamber (14), the brakes being energized hydraulically from a high pressure gas chamber (71). When a large mass of ice contacts the drag wheels, a braking force determined by the pressure in the gas chamber (71) is applied to the ice, thereby reducing its speed.
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patent: 4350114 (1982-09-01), Schirtzinger
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