US Patent No: 6,042,499
Number of patents in Portfolio can not be more than 2000
Power transmission device for helicopter
Stats
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Mar 28, 2000
Issued date -
Dec 9, 1996
filing date -
08/702,456
serial no -
In Force
status
Importance
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Abstract
The engines which have output shafts connected to traction speed change mechanisms via freewheel clutches are decelerated or accelerated at a desired speed change ratio and then rotate and drive a collector gear and a main rotor shaft. A part of output torque of the engines is diverted into gears to drive and rotate accessories and a tail rotor. Such an arrangement is useful for a power transmission for a helicopter in that it enables the speed of rotation of the main rotor to be varied while the speed of rotation of the engines is kept constant.
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First Claim
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International Classification(s)
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Cited Art
| Patent Info | (Count) | # Cites | Year |
|---|---|---|---|
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| 4,922,788 Continuously variable transmission | 17 | 1988 | |
| 5,090,951 Hydraulic control circuits for continuously-variable-ratio transmissions | 21 | 1991 | |
| 5,232,414 Transmissions of the toroidal-race rolling-traction type | 8 | 1992 | |
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| 5,782,433 Engine deceleration device and power transmission device for helicopters | 15 | 1996 | |
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| 5,271,295 Mechanism for transmitting power between a driving shaft and two assemblies to be driven | 22 | 1993 | |
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| 5,149,351 Method for making a curved solar panel for an automobile | 12 | 1991 | |
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| 4,296,241 Preparation of 3-(2,2-dichlorovinyl)-2,2-dimethyl-cyclopropane-1-carboxylic acid derivatives | 4 | 1980 | |
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| 4,306,196 Operational amplifier with offset compensation | 17 | 1980 | |
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| 5,139,386 Apparatus for the stacking of printing products arriving in an imbricated formation | 4 | 1990 | |
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| 4,768,398 Continuously-variable transmission | 20 | 1987 | |
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| 4,382,188 Dual-range drive configurations for synchronous and induction generators | 69 | 1981 | |
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| 4,287,799 Roller apparatus for cutting glass fibers | 24 | 1977 | |
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| 4,856,374 Adjustable transmission | 135 | 1988 | |
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| 4,856,371 Traction drive transmission system | 7 | 1987 | |