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| Number | Title | Issue Date |
| 7273207 | Bi-directional winch A winch includes a first cable reel and a second cable reel. A driveshaft rotates the first cable reel and the second cable reel. The driveshaft is moveable along an axis of rotation between a first position and a second position. The driveshaft operationally engage... | 09/25/2007 |
| 7270312 | Multifunctional winch drum drive system A winch drum drive system for controlling a kite. The winch drum drive system includes spools for winding an unwinding kite control lines and a set of planetary gears rotatably attached to one end of each of the spools. A ring gear wraps around each set of planetary... | 09/18/2007 |
| 5607142 | Lifting apparatus A lifting apparatus (1) comprises a frame (30) and a carrier device (12) for carrying a load (2). The lifting apparatus includes two separate suspension devices (11a, b) which, by respective lines (13a, b) are connected to respective rotary drums (14a, b)... | 03/04/1997 |
| 5507471 | Wire tensioning device A wire tensioning device for use in repairing breaks in wires strung between supports comprising a pair of drums that revolve about parallel axes, belts of insulating material respectively wrapped about each drum, a motor coupled to drive said drums in ei... | 04/16/1996 |
| 5143479 | Carrier vessel especially suitable for oil spill containment A boom includes a plurality of boom sections joined end to end. Each boom section includes two or more parallel inflatable chambers which are joined with a weighted curtain which is reinforced for strength. Boom sections are stored compactly on respective... | 09/01/1992 |
| 4257578 | Oil well service rig An oil well service rig having three reels, two of the reels actuated by a hydraulic pump through a gear box which provides for selective engagement or disengagement and a two speed gear ratio change for either reel, the hydraulic pump being driven by a g... | 03/24/1981 |
| 3984084 | Assembly apparatus for nuclear reactors Moisting apparatus for assembling and operating a nuclear reactor comprises two rope drums, two gear mechanisms, and two hoisting mechanisms each with one rope for a predetermined load, a change-speed gear mechanism or shiftable gear mechanism for the sel... | 10/05/1976 |
