Source: http://www.google.com/patents/US5186609?dq=5083039
Timestamp: 2015-07-08 05:48:48
Document Index: 735539183

Matched Legal Cases: ['art 109', 'art 109', 'art 109', 'art 109', 'art 109', 'art 109', 'art 109', 'art 109']

Patent US5186609 - Contrarotating propeller type propulsion system - Google PatentsSearch Images Maps Play YouTube News Gmail Drive More »Sign inAdvanced Patent SearchPatentsA contrarotating propeller type propulsion system having first and second output rotary cylinders which are carried individually on an outside support cylinder fixedly secured to a first support structure, the first output rotary cylinder being borne on the outer peripheral surface of the first support...http://www.google.com/patents/US5186609?utm_source=gb-gplus-sharePatent US5186609 - Contrarotating propeller type propulsion systemAdvanced Patent SearchPublication numberUS5186609 APublication typeGrantApplication numberUS 07/631,669Publication dateFeb 16, 1993Filing dateDec 20, 1990Priority dateDec 20, 1990Fee statusLapsedPublication number07631669, 631669, US 5186609 A, US 5186609A, US-A-5186609, US5186609 A, US5186609AInventorsKazuo Inoue, Osamu Kubota, Takashi Komura, Etsuo NodaOriginal AssigneeHonda Giken Kogyo Kabushiki KaishaExport CitationBiBTeX, EndNote, RefManPatent Citations (13), Referenced by (18), Classifications (7), Legal Events (6) External Links: USPTO, USPTO Assignment, EspacenetContrarotating propeller type propulsion system
US 5186609 AAbstract
6. A system as defined in claim 1 further comprising means for preventing overheating of the propulsion system including(a) an inner cylinder disposed inside an outer cylinder forming an annular exhaust passage therebetween; (b) a reduction case disposed inside the inner cylinder forming an annular cooling passage therebetween. 7. A system as defined in claim 4 wherein the means for preventing overheating of the propulsion system further includes (c) means for directing air through air inlets into the annular cooling air passage and (d) means for directing working gas driving the rotor through the annular exhaust passage.
12. A contrarotating propeller type propulsion system for driving first and second propellers, comprisinga driving shaft connectable to a rotor; a sun gear fixed to the driving shaft; a ring gear concentrically surrounding the sun gear; a plurality of planetary gears interposed between the sun gear and the ring gear concentrically surrounding the sun gear; a plurality of support shafts, each support shaft supporting a respective planetary gear, each planetary gear rotating on its respective support shaft and revolving around the sun gear; a first output rotary cylinder for driving a first propeller coupled to the ring gear; and a second output rotary cylinder for driving a second propeller coupled to a support shaft for the planetary gear, wherein the first and second output rotary cylinders are carried individually on a first support cylinder fixedly secured to a support structure, the first output rotary cylinder being borne on the outer peripheral surface of the first support cylinder through bearing means and the second output rotary cylinder is borne on the inner peripheral surface of the first support cylinder through bearing means. 13. A system as defined in claim 12, wherein said first and second output rotary cylinders are arranged concentrically with said first support cylinder.
17. A system as defined in claim 12 further comprising means for preventing overheating of the propulsion system including(a) an inner cylinder disposed inside an outer cylinder forming an annular exhaust passage therebetween; (b) a reduction case disposed inside the inner cylinder forming an annular cooling passage therebetween. 18. A system as defined in claim 17 wherein the means for preventing overheating of the propulsion system further includes (c) means for directing air through air inlets into the annular cooling air passage and (d) means for directing working gas driving the rotor through the annular exhaust passage.
20. A contrarotating propeller type propulsion system for driving first and second propellers, comprisinga gear drive system including a drive shaft operably connected to the rotor for driving first and second propellers, the gear drive system disposed within a reduction case; means for preventing overheating of the propulsion system including (a) an inner cylinder disposed inside an outer cylinder forming an annular exhaust passage therebetween, (b) a reduction case disposed inside the inner cylinder forming an annular cooling passage therebetween, and (c) inlet passage means extending radially inward through the outer cylinder, through the annular exhaust passage, and through the inner cylinder for providing passage of outside air through the annular exhaust passage into the annular cooling passage. 21. A system as defined in claim 20 wherein the means for preventing overheating of the propulsion system further includes (d) means for directing working gas driving the rotor through the annular exhaust passage.
23. A contrarotating propeller type propulsion system for driving first and second propellers, comprisinga gear drive system including a drive shaft operably connected to the rotor for driving first and second propellers, the gear drive system disposed within a reduction case; and means for preventing overheating of the propulsion system including(a) an inner cylinder disposed inside an outer cylinder forming an annular exhaust passage therebetween, (b) a reduction case disposed inside the inner cylinder forming an annular cooling passage therebetween, (c) inlet passage means extending radially inward through the annular exhaust passage for providing passage of outside air through the annular exhaust passage into the annular cooling passage, and (d) a lubricating oil system which circulates oil through the reduction case, wherein the lubricating oil system includes an oil discharge outlet positioned toward one end of the reduction case, said reduction case increasing in diameter towards the oil discharge outlet. 24. A system as defined in claim 20 further comprising means for reducing influence of heat from the exhaust passage on the blades comprising a separate air intake cylinder positioned outside of the outer cylinder, the separate air intake cylinder directing an air current along an outside surface of the outer cylinder.
25. A contrarotating propeller type propulsion system for driving first and second propellers, comprisinga gear drive system including a drive shaft operably connected to the rotor for driving first and second propellers, the gear drive system disposed within a reduction case; and means for preventing overheating of the propulsion system including(a) an inner cylinder disposed inside an outer cylinder forming an annular exhaust passage therebetween, (b) a reduction case disposed inside the inner cylinder forming an annular cooling passage therebetween, and (c) a lubricating oil system which circulates oil through the reduction case by the rotating action of the reduction case, wherein the lubricating oil system includes an oil discharge outlet positioned toward one end of the reduction case, said reduction case increasing in diameter towards the oil discharge outlet. Description
As best shown in FIGS. 4, 5 and 8, lubricating oil passing through the reduction case 109 is returned to an oil tank (not shown) by way of an oil discharge pipe 136 connected to the outside support cylinder 121 in front of front case part 109f and into an oil passage 136a which extends rearwardly in the outside support cylinder 121. An oil pick-up tube 136 is mounted on the outside support cylinder 121 in communication with the oil passage 136a and extends downwardly to near the bottom of the inside of front case part 109f. The lower end of oil pick-up tube 136b has a 90� bend to cause the open end 136c to face in the circumferential direction confronting the direction of rotation of middle case part 109m. Oil is discharged from middle case part 109m through holes 136d and naturally imparts a circumferential motion to the oil which assists the pick-up of the oil through the open end 136c of pick-up tube 136b. The open end 136c of the oil pick-up tube 136b is disposed near the front end of the front case part 109f, and the front case part 109f, the middle case part 109m and the rear case part 109r are formed to be gradually reduced in diameter in the rearward direction to cause all of the oil to migrate toward the pick-up tube 136b.
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