Static structures (e.g. – buildings) – Means compensating earth-transmitted force – Dynamic force generator
Reexamination Certificate
2005-02-22
2005-02-22
Graham, Matthew C. (Department: 3683)
Static structures (e.g., buildings)
Means compensating earth-transmitted force
Dynamic force generator
C052S167100, C188S378000
Reexamination Certificate
active
06857231
ABSTRACT:
A propeller controlled active tuned-liquid-column damper (TLCD), which can control and suppress the vibration thereof, such as building, tower, bridge, vehicle, ship, offshore platform, facilities, and instrument, etc. This invention is composed of a passive TLCD, one or more propellers, a gear-shaft unit, a servo-motor, and a computer-control system. One or more propellers are installed in a line along the gear-shaft unit inside the horizontal section of the U-shape vessel, the propellers are driven by a servo-motor controlled by the computer-control system which start the servo-motor to drive the propellers immediately. Both fluid (or water) acceleration and the propellers' thrust can yield the resistance force to increase the vibration-control ability significantly. The natural period of an open TLCD can be adjusted by only changing the wetted length, whereas a closed TLCD can be adjusted by changing the wetted length, air pressure and air volume in the air chamber.
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Graham Matthew C.
Sy Mariano
Troxell Law Office PLLC
LandOfFree
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