Transmission for driving, counter-rotating propellers, lubrication system, and associated methods
원문보기
IPC분류정보
국가/구분
United States(US) Patent
등록
국제특허분류(IPC7판)
B63H-020/14
출원번호
US-0290074
(2002-11-07)
발명자
/ 주소
Jordan, W. Bishop
대리인 / 주소
Allen, Dyer, Doppelt, Milbrath & Gilchrist, P.A.
인용정보
피인용 횟수 :
3인용 특허 :
18
초록▼
A hybrid gear/sprocket-based transmission is provided for driving a pair of coaxial, counter-rotating propellers in aircraft and airboats. A drive shaft couplable to an engine crank shaft extends rearward into the transmission case, and a pair of coaxial hollow driven shafts extend rearward out of t
A hybrid gear/sprocket-based transmission is provided for driving a pair of coaxial, counter-rotating propellers in aircraft and airboats. A drive shaft couplable to an engine crank shaft extends rearward into the transmission case, and a pair of coaxial hollow driven shafts extend rearward out of the transmission case, to which are attachable a pair of propellers. A gear train, containing an even number of gears, reverses the rotational direction of the engine; a sprocket train, containing two sprockets and a chain connecting them, retains the rotational direction of the engine. Improved stability characteristics are imparted by supporting the drive shaft at two points within the case and also by positioning the drive and the driven shafts in vertical alignment. The adaptability of the transmission to being coupled with an automobile engine confers improved noise, reliability, and fuel efficiency characteristics.
대표청구항▼
A hybrid gear/sprocket-based transmission is provided for driving a pair of coaxial, counter-rotating propellers in aircraft and airboats. A drive shaft couplable to an engine crank shaft extends rearward into the transmission case, and a pair of coaxial hollow driven shafts extend rearward out of t
A hybrid gear/sprocket-based transmission is provided for driving a pair of coaxial, counter-rotating propellers in aircraft and airboats. A drive shaft couplable to an engine crank shaft extends rearward into the transmission case, and a pair of coaxial hollow driven shafts extend rearward out of the transmission case, to which are attachable a pair of propellers. A gear train, containing an even number of gears, reverses the rotational direction of the engine; a sprocket train, containing two sprockets and a chain connecting them, retains the rotational direction of the engine. Improved stability characteristics are imparted by supporting the drive shaft at two points within the case and also by positioning the drive and the driven shafts in vertical alignment. The adaptability of the transmission to being coupled with an automobile engine confers improved noise, reliability, and fuel efficiency characteristics. o 1800° C. to allow the carbon to react with silicon in the rigid structure to form silicon carbide. 2. The process of claim 1, wherein a mean particle size of the silicon precursor powder ranges from about 1 to 100 μm. 3. The process of claim 1, wherein a mean particle size of the silicon precursor powder ranges from about 5 to 50 μm. 4. The process of claim 1, wherein the mixture comprises about 10 to 60% by weight of the silicon precursor powder. 5. The process of claim 1, wherein the mixture comprises about 10 to 60% by weight of the cross-linking thermoset resin. 6. The process of claim 1, wherein the mixture exhibits a carbon to silicon atomic ratio of about 1:1. 7. The process of claim 1, wherein the cross-linking thermoset resin has a carbon yield of at least 20% by weight. 8. The process of claim 7, wherein the cross-linking thermoset resin is a phenolic resin. 9. The process of claim 1, wherein the silicon-containing filler is silicon carbide. 10. The process of claim 1, wherein the mixture comprises 10 to 75% by weight of the silicon-containing filler. 11. The process of claim 1, wherein a mean particle size of the silicon-containing filler is in a range from 1 to 100 μm. 12. The process of claim 1, further comprising adding a pore-forming filler to the mixture prior to molding the mixture. 13. The process of claim 12, wherein the pore-forming filler is added in an amount ranging from about 1 to 15% by weight. 14. The process of claim 1, further comprising adding an organic fibrous filler to the mixture prior to molding the mixture. 15. The process of claim 14, wherein the organic fibrous filler is added in an amount ranging from about, 1 to 15%.
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이 특허에 인용된 특허 (18)
Kaye Bruce, Airboat systems and methods for increasing engine efficiency while reducing torque and noise.
Newman Neil A. (Omro WI) Bankstahl Herbert A. (Fond du Lac WI) Beck Wayne T. (Fond du Lac WI), Chain driven marine propulsion system with steerable gearcase and dual counterrotating propellers.
von Bergen Ernst-Peter (Ahlefeld DEX) Pietsch Gnter (Hamburg DEX), Ship, in particular deep draft vessel having concentric, contra-rotating propellers.
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