최소 단어 이상 선택하여야 합니다.
최대 10 단어까지만 선택 가능합니다.
다음과 같은 기능을 한번의 로그인으로 사용 할 수 있습니다.
NTIS 바로가기다음과 같은 기능을 한번의 로그인으로 사용 할 수 있습니다.
DataON 바로가기다음과 같은 기능을 한번의 로그인으로 사용 할 수 있습니다.
Edison 바로가기다음과 같은 기능을 한번의 로그인으로 사용 할 수 있습니다.
Kafe 바로가기국가/구분 | United States(US) Patent 등록 |
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국제특허분류(IPC7판) |
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출원번호 | US-0288537 (2002-11-06) |
우선권정보 | JP-0352424 (2001-11-16); JP-0352423 (2001-11-16) |
발명자 / 주소 |
|
출원인 / 주소 |
|
인용정보 | 피인용 횟수 : 1 인용 특허 : 1 |
A fluid coupling comprising:a pump having a pump shell and a plurality of impellers arranged in the pump shell; anda turbine disposed opposite said pump and having a turbine shell and a plurality of runners arranged in said turbine shell; whereinprovision is made of a baffle mechanism which retracta
A fluid coupling comprising:a pump having a pump shell and a plurality of impellers arranged in the pump shell; anda turbine disposed opposite said pump and having a turbine shell and a plurality of runners arranged in said turbine shell; whereinprovision is made of a baffle mechanism which retractably protrudes into a fluid circulatory passage formed by the pump shell and the turbine shell, the baffle mechanism greatly protruding into the fluid circulatory passage in a state where the rotational speed is low and protruding little into the fluid circulatory passage in a state where the rotational speed is high.
1. A fluid coupling, comprising:a pump, comprising a pump shell, an annular core ring, and a plurality of impellers, said pump core ring and said impellers being arranged in said pump shell; a turbine disposed opposite said pump and comprising a turbine shell, an annular core ring, and a plurality o
1. A fluid coupling, comprising:a pump, comprising a pump shell, an annular core ring, and a plurality of impellers, said pump core ring and said impellers being arranged in said pump shell; a turbine disposed opposite said pump and comprising a turbine shell, an annular core ring, and a plurality of runners, said turbine core ring and said runners being arranged in said turbine shell, said pump shell and said turbine shell forming a fluid circulatory passage; and a baffle mechanism retractably protruding into the fluid circulatory passage, said baffle mechanism protruding into the fluid circulatory passage by a first amount when the rotational speed is low, and protruding into the fluid circulatory passage by a second amount, less than the first amount, when the rotational speed is high. wherein said baffle mechanism comprises a plurality of baffle plates arranged between the core ring of said pump shell and the core ring of said turbine shell so as to move in the radial direction, a guide device mounted on the core ring of said turbine shell so as to guide the movement of said plurality of baffle plates, and a limiting device for limiting the movement of said plurality of baffle plates until the rotational speed of said turbine reaches a predetermined value. 2. A fluid coupling according to claim 1, wherein said baffle plates are arranged along said core ring of said turbine shell.3. A fluid coupling according to claim 2, wherein said limiting device comprises spring members arranged among said baffle plates.4. A fluid coupling according to claim 1, wherein said baffle plates are fitted with weight members.5. A fluid coupling according to claim 1, wherein said limiting device comprises spring members arranged between said baffle plates and the core ring of said turbine shell.6. A fluid coupling, comprising:a pump, comprising a pump shell, an annular core ring, and a plurality of impellers, said pump core ring and said impellers being arranged in said pump shell; a turbine disposed opposite said pump and comprising a turbine shell, an annular core ring, and a plurality of runners, said turbine core ring and said runners being arranged in said turbine shell, said pump shell and said turbine shell forming a fluid circulatory passage; and a baffle mechanism retractably protruding into the fluid circulatory passage, said baffle mechanism protruding into said fluid circulatory passage by a first amount when the rotational speed is low, and protruding into the fluid circulatory passage by a second amount, less than the first amount, when the rotational speed is high, wherein: said baffle mechanism comprises a plurality of baffle plates arranged between the core ring of said pump shell and the core ring of said turbine shell so as to move in a radial direction, a guide device mounted on the core ring of said pump shell so as to guide the movement of said baffle plates, and a limiting device for limiting the movement of said baffle plates until the rotational speed of said pump reaches a predetermined value, and said plurality of baffle plates are fitted with weight members. 7. A fluid coupling according to claim 6, wherein said baffle plates are arranged along the core ring of said pump shell.8. A fluid coupling, comprising:a pump, comprising a pump shell, an annular core ring, and a plurality of impellers, said pump core ring and said impellers being arranged in said pump shell; a turbine disposed opposite said pump and comprising a turbine shell, an annular core ring, and a plurality of runners, said turbine core ring and said runners being arranged in said turbine shell, said pump shell and said turbine shell forming a fluid circulatory passage; and a baffle mechanism retractably protruding into the fluid circulatory passage, said baffle mechanism protruding into the fluid circulatory passage by a first amount when the rotational speed is low, and protruding into the fluid circulatory passage by a second amount less than the first amount, when the rotational speed is high, wherein: said baffle mechanism comprises baffle plates arranged between the core ring of said pump shell and the core ring of said turbine shell so as to move in the radial direction, a guide device mounted on the core ring of said pump shell so as to guide the movement of said baffle plates, and a limiting device for limiting the movement of said baffle plates until the rotational speed of said pump reaches a predetermined value, and said limiting device comprises spring members arranged among said baffle plates. 9. A fluid coupling, comprising:a pump, comprising a pump shell, an annular core ring, and a plurality of impellers, said pump core ring and said impellers being arranged in said pump shell; a turbine disposed opposite said pump and comprising a turbine shell, an annular core ring, and a plurality of runners, said turbine core ring and said runners being arranged in said turbine shell, said pump shell and said turbine shell forming a fluid circulatory passage; and a baffle mechanism retractably protruding into the fluid circulatory passage, said baffle mechanism protruding into the fluid circulatory passage by a first amount when the rotational speed is low, and protruding into the fluid circulatory passage by a second amount, less than the first amount, when the rotational speed is high, wherein said baffle mechanism comprises a plurality of baffle plates arranged between the core ring of said pump shell and the core ring of said turbine shell, a support shaft mounted on the core ring of said turbine shell to rotatably support said baffle plates at the ends on one side thereof, and a limiting device for limiting the movement of said baffle plates until the rotational speed of said turbine reaches a predetermined value. 10. A fluid coupling according to claim 9, wherein said baffle plates are arranged along the core ring of said turbine shell.11. A fluid coupling according to claim 10, wherein said limiting device comprises spring members arranged among said baffle plates.12. A fluid coupling according to claim 9, wherein said baffle plates are fitted with weight members.13. A fluid coupling, comprising:a pump, comprising a pump shell, an annular core ring, and a plurality of impellers, said pump core ring and said impellers being arranged in said pump shell; a turbine disposed opposite said pump and comprising a turbine shell, an annular core ring, and a plurality of runners, said turbine core ring and said runners being arranged in said turbine shell, said pump shell and said turbine shell forming a fluid circulatory passage; and a baffle mechanism retractably protruding into the fluid circulatory passage, said baffle mechanism protruding into the fluid circulatory passage by a first amount when the rotational speed is low, and protruding into the fluid circulatory passage by a second amount, less than the first amount, when the rotational speed is high, wherein: said baffle mechanism comprises a plurality of baffle plates arranged between the core ring of said pump shell and the core ring of said turbine shell, a support shaft mounted on the core ring of said pump shell to rotatably support said baffle plates at the ends on one side thereof, and a limiting device for limiting the movement of said baffle plates until the rotational speed of said pump reaches a predetermined value, each of said baffle plates comprises a baffle portion, a support portion, and a coupling portion coupling said baffle portion and said support portion together, said support portion being rotatably supported by said support shaft, and said baffle portions of said baffle plates are fitted with weight members. 14. A fluid coupling according to claim 13, wherein said baffle plates are arranged along the core ring of said pump shell.15. A fluid coupling, comprising:a pump, comprising a pump shell, an annular core ring, and a plurality of impellers, said pump core ring and said impellers being arranged in said pump shell; a turbine disposed opposite said pump and comprising a turbine shell, an annular core ring, and a plurality of runners, said turbine core ring and said runners being arranged in said turbine shell, said pump shell and said turbine shell forming a fluid circulatory passage; and a baffle mechanism retractably protruding into the fluid circulatory passage, said baffle mechanism protruding into the fluid circulatory passage by a first amount when the rotational speed is low, and protruding into the fluid circulatory passage by a second amount, less than the first amount, when the rotational speed is high, wherein: said baffle mechanism comprises a plurality of baffle plates arranged between the core ring of said pump shell and the core ring of said turbine shell, a support shaft mounted on the core ring of said pump shell to rotatably support said baffle plates at the ends on one side thereof, and a limiting device for limiting the movement of said baffle plates until the rotational speed of said pump reaches a predetermined value, and said limiting device comprises spring members arranged among said baffle plates. 16. A fluid coupling, comprisinga pump, comprising a pump shell, an annular core ring, and a plurality of impellers, said pump core ring and said impellers being arranged in said pump shell; a turbine disposed opposite said pump and comprising a turbine shell, an annular core ring, and a plurality of runners, said turbine core ring and said runners being arranged in said turbine shell, said pump shell and said turbine shell forming a fluid circulatory passage; and a baffle mechanism retractably protruding into the fluid circulatory passage, said baffle mechanism protruding into the fluid circulatory passage by a first amount when the rotational speed is low, and protruding into the fluid circulatory passage by a second amount, less than the first amount, when the rotational speed is high, wherein said baffle mechanism comprises a plurality of baffle plates which are arranged between the core ring of said pump shell and the core ring of said turbine shell, and a support shaft mounted on the inner periphery of the turbine shell to rotatably support said baffle plates at the ends on one side thereof, and a limiting device for limiting the movement of said baffle plates until the rotational speed of said turbine reaches a predetermined value. 17. A fluid coupling according to claim 16, wherein said baffle plates are arranged along the core ring of said turbine shell.18. A fluid coupling according to claim 17, wherein said limiting device comprises spring members arranged between said baffle plates and said core ring of said turbine shell.19. A fluid coupling according to claim 16, wherein said baffle plates are fitted with weight members.20. A fluid coupling, comprising:a pump, comprising a pump shell, an annular core ring, and a plurality of impellers, said pump core ring and said impellers being arranged in said pump shell; a turbine disposed opposite said pump and comprising a turbine shell, an annular core ring, and a plurality of runners, said turbine core ring and said runners being arranged in said turbine shell, said pump shell and said turbine shell forming a fluid circulatory passage; and a baffle mechanism retractably protruding into the fluid circulatory passage, said baffle mechanism protruding into the fluid circulatory passage by a first amount when the rotational speed is low, and protruding into the fluid circulatory passage by a second amount, less than the first amount, when the rotational speed is high, wherein: said baffle mechanism comprises a plurality of baffle plates arranged between the core ring of said pump shell and the core ring of said turbine shell, and a support shaft mounted on the inner periphery of said pump shell to rotatably support said baffle plates at the ends on one side thereof, and a limiting device for limiting the movement of said baffle plates until the rotational speed of said pump reaches a predetermined value, and said baffle plates are fitted with weight members. 21. A fluid coupling according to claim 20, wherein said baffle plates are arranged along the core ring of said pump shell.22. A fluid coupling, comprising:a pump, comprising a pump shell, an annular core ring, and a plurality of impellers, said pump core ring and said impellers being arranged in said pump shell; a turbine disposed opposite said pump and comprising a turbine shell, an annular core ring, and a plurality of runners, said turbine core ring and said runners being arranged in said turbine shell, said pump shell and said turbine shell forming a fluid circulatory passage; and a baffle mechanism retractably protruding into the fluid circulatory passage, said baffle mechanism protruding into the fluid circulatory passage by a first amount when the rotational speed is low, and protruding into the fluid circulatory passage by a second amount, less than the first amount, when the rotational speed is high, wherein: said baffle mechanism comprises a plurality of baffle plates arranged between the core ring of said pump shell and the core ring of said turbine shell, and a support shaft mounted on the inner periphery of said pump shell to rotatably support said baffle plates at the ends on one side thereof, and a limiting device for limiting the movement of said baffle plates until the rotational speed of said pump reaches a predetermined value, and said limiting device comprises spring members arranged among said baffle plates. 23. A fluid coupling, comprising:a pump comprising an annular pump shell, and a plurality of impellers arranged in said pump shell; a turbine disposed opposite said pump and comprising an annular turbine shell, and a plurality of runners arranged in said turbine shell, said pump shell and said turbine shell forming a fluid circulatory passage; and a baffle mechanism movable in the radial direction between the inner peripheral side and the central portion of the fluid circulatory passage, said baffle mechanism being positioned on the inner peripheral side of the fluid circulatory passage when the rotational speed is low and moving toward the central portion of the fluid circulatory passage when the rotational speed is high, wherein said baffle mechanism comprises a plurality of baffle plates arranged between said pump and said turbine, a guide device mounted on said turbine so as to guide the movement of said baffle plates, and a limiting device for limiting the movement of said baffle plates until the rotational speed of said turbine reaches a predetermined value. 24. A fluid coupling according to claim 23, wherein said baffle plates are arranged along said turbine shell.25. A fluid coupling according to claim 24, wherein said limiting device comprises spring members arranged among said baffle plates.26. A fluid coupling according to claim 23, wherein said baffle plates are fitted with weight members.27. A fluid coupling, comprising:a pump comprising an annular pump shell, and a plurality of impellers arranged in said pump shell; a turbine disposed opposite said pump and comprising an annular turbine shell, and a plurality of runners arranged in said turbine shell, said pump shell and said turbine shell forming a fluid circulatory passage; and a baffle mechanism movable in the radial direction between the inner peripheral side and the central portion of the fluid circulatory passage, said baffle mechanism being positioned on the inner peripheral side of the fluid circulatory passage when the rotational speed is low and moving toward the central portion of the fluid circulatory passage when the rotational speed is high, wherein: said baffle mechanism comprises a plurality of baffle plates arranged between said pump and said turbine, a guide device mounted on said pump so as to guide the movement of said baffle plates, and a limiting device for limiting the movement of said baffle plates until the rotational speed of said pump reaches a predetermined value, and said baffle plates are fitted with weight members. 28. A fluid coupling according to claim 27, wherein said baffle plates are arranged along said pump shell.29. A fluid coupling, comprising:a pump comprising an annular pump shell, and a plurality of impellers arranged in said pump shell; a turbine disposed opposite said pump and comprising an annular turbine shell, and a plurality of runners arranged in said turbine shell, said pump shell and said turbine shell forming a fluid circulatory passage; and a baffle mechanism movable in the radial direction between the inner peripheral side and the central portion of the fluid circulatory passage, said baffle mechanism being positioned on the inner peripheral side of the fluid circulatory passage when the rotational speed is low and moving toward the central portion of the fluid circulatory passage when the rotational speed is high, wherein: said baffle mechanism comprises a plurality of baffle plates arranged between said pump and said turbine, a guide device mounted on said pump so as to guide the movement of said baffle plates, and a limiting device for limiting the movement of said baffle plates until the rotational speed of said pump reaches a predetermined value, and said limiting device comprises spring members arranged among said baffle plates. 30. A fluid coupling, comprising:a pump comprising an annular pump shell, and a plurality of impellers arranged in said pump shell; a turbine disposed opposite said pump and comprising an annular turbine shell, and a plurality of runners arranged in said turbine shell, said pump shell and said turbine shell forming a fluid circulatory passage; and a baffle mechanism movable in the radial direction between the inner peripheral side and the central portion of the fluid circulatory passage, said baffle mechanism being positioned on the inner peripheral side of the fluid circulatory passage when the rotational speed is low and moving toward the central portion of the fluid circulatory passage when the rotational speed is high, wherein said baffle mechanism comprises a plurality of baffle plates arranged between the core ring of said pump shell and the core ring of said turbine shell and a support shaft mounted on said turbine shell to rotatably support said baffle plates at the ends on one side thereof, and a limiting device for limiting the movement of said baffle plates until the rotational speed of said turbine reaches a predetermined value. 31. A fluid coupling according to claim 30, wherein said baffle plates are arranged along said turbine shell.32. A fluid coupling according to claim 31, wherein said limiting device comprises spring members arranged among the said baffle plates.33. A fluid coupling according to claim 30, wherein said baffle plates are fitted with weight members.34. A fluid coupling, comprising:a pump comprising an annular pump shell, and a plurality of impellers arranged in said pump shell; a turbine disposed opposite said pump and comprising an annular turbine shell, and a plurality of runners arranged in said turbine shell, said pump shell and said turbine shell forming a fluid circulatory passage; and a baffle mechanism movable in the radial direction between the inner peripheral side and the central portion of the fluid circulatory passage, said baffle mechanism being positioned on the inner peripheral side of the fluid circulatory passage when the rotational speed is low and moving toward the central portion of the fluid circulatory passage when the rotational speed is high, wherein: said baffle mechanism comprises a plurality of baffle plates arranged between the core ring of said pump shell and the core ring of said turbine shell, a support shaft mounted on the pump shell to rotatably support said baffle plates at the ends on one side thereof, and a limiting device for limiting the movement of said baffle plates until the rotational speed of said pump reaches a predetermined value, and said baffle plates are fitted with weight members. 35. A fluid coupling according to claim 34, wherein said baffle plates are arranged along said pump shell.36. A fluid coupling, comprising:a pump comprising an annular pump shell, and a plurality of impellers arranged in said pump shell; a turbine disposed opposite said pump and comprising an annular turbine shell, and a plurality of runners arranged in said turbine shell, said pump shell and said turbine shell forming a fluid circulatory passage; and a baffle mechanism movable in the radial direction between the inner peripheral side and the central portion of the fluid circulatory passage, said baffle mechanism being positioned on the inner peripheral side of the fluid circulatory passage when the rotational speed is low and moving toward the central portion of the fluid circulatory passage when the rotational speed is high, wherein: said baffle mechanism comprises a plurality of baffle plates which are arranged between the core ring of said pump shell and the core ring of said turbine shell and are rotatably supported, at the ends on one side thereof, by a support shaft mounted on the pump shell, and a limiting means for limiting the movement of the baffle plates until the rotational speed of said pump reaches a predetermined value, said baffle plates are arranged along said pump shell, and said limiting device comprises spring members arranged among said baffle plates. 37. A fluid coupling, comprising:a pump comprising an annular pump shell, and a plurality of impellers arranged in said pump shell; a turbine disposed opposite said pump and comprising an annular turbine shell and a plurality of runners arranged in said turbine shell, said pump shell and said turbine shell forming a fluid circulatory passage; and a baffle mechanism retractably protruding toward the outer peripheral portion in the radial direction of the fluid circulatory passage, said baffle mechanism being positioned on the outer peripheral portion of the fluid circulatory passage when the rotational speed is low and retracting from the outer peripheral portion of the fluid circulatory passage when the rotational speed is high, wherein said baffle mechanism comprises a plurality of baffle plates arranged between said pump and said turbine, a guide device mounted on said turbine so as to guide the movement of said baffle plates, and a limiting device for limiting the movement of said plurality of baffle plates until the rotational speed of said turbine reaches a predetermined value. 38. A fluid coupling according to claim 37, wherein said baffle plates are arranged along said turbine shell.39. A fluid coupling according to claim 38, wherein said limiting device comprises spring members arranged among the said baffle plates.40. A fluid coupling according to claim 37, wherein said baffle plates are fitted with weight members.41. A fluid coupling, comprising:a pump comprising an annular pump shell, and a plurality of impellers arranged in said pump shell; a turbine disposed opposite said pump and comprising an annular turbine shell and a plurality of runners arranged in said turbine shell, said pump shell and said turbine shell forming a fluid circulatory passage; and a baffle mechanism retractably protruding toward the outer peripheral portion in the radial direction of the fluid circulatory passage, said baffle mechanism being positioned on the outer peripheral portion of the fluid circulatory passage when the rotational speed is low and retracting from the outer peripheral portion of the fluid circulatory passage when the rotational speed is high, wherein said baffle mechanism comprises a plurality of baffle plates between said pump and said turbine, a guide device mounted on said pump so as to guide the movement of said baffle plates, and a limiting device for limiting the movement of said baffle plates until the rotational speed of said pump reaches a predetermined value, and said baffle plates are fitted with weight members. 42. A fluid coupling according to claim 41, wherein said baffle plates are arranged along said pump shell.43. A fluid coupling, comprising:a pump comprising an annular pump shell, and a plurality of impellers arranged in said pump shell; a turbine disposed opposite said pump and comprising an annular turbine shell and a plurality of runners arranged in said turbine shell, said pump shell and said turbine shell forming a fluid circulatory passage; and a baffle mechanism retractably protruding toward the outer peripheral portion in the radial direction of the fluid circulatory passage, said baffle mechanism being positioned on the outer peripheral portion of the fluid circulatory passage when the rotational speed is low and retracting from the outer peripheral portion of the fluid circulatory passage when the rotational speed is high, wherein said baffle mechanism comprises a plurality of baffle plates between said pump and said turbine, a guide device mounted on said pump so as to guide the movement of said baffle plates, and a limiting device for limiting the movement of said baffle plates until the rotational speed of said pump reaches a predetermined value, and said limiting device comprises spring members arranged among said baffle plates. 44. A fluid coupling, comprising:a pump comprising an annular pump shell, and a plurality of impellers arranged in said pump shell; a turbine disposed opposite said pump and comprising an annular turbine shell and a plurality of runners arranged in said turbine shell, said pump shell and said turbine shell forming a fluid circulatory passage; and a baffle mechanism retractably protruding toward the outer peripheral portion in the radial direction of the fluid circulatory passage, said baffle mechanism being positioned on the outer peripheral portion of the fluid circulatory passage when the rotational speed is low and retracting from the outer peripheral portion of the fluid circulatory passage when the rotational speed is high, wherein: said baffle mechanism comprises a plurality of baffle plates arranged between the core ring of said pump shell and the core ring of said turbine shell, a support shaft mounted on the outer periphery of the pump shell to rotatably support said baffle plates at the ends on one side thereof, and a limiting device for limiting the movement of said baffle plates until the rotational speed of said pump reaches a predetermined value, and said baffle plates are fitted with weight members. 45. A fluid coupling according to claim 44, wherein said baffle plates are arranged along said pump shell.46. A fluid coupling, comprising:a pump comprising an annular pump shell, and a plurality of impellers arranged in said pump shell; a turbine disposed opposite said pump and comprising an annular turbine shell and a plurality of runners arranged in said turbine shell, said pump shell and said turbine shell forming a fluid circulatory passage; and a baffle mechanism retractably protruding toward the outer peripheral portion in the radial direction of the fluid circulatory passage, said baffle mechanism being positioned on the outer peripheral portion of the fluid circulatory passage when the rotational speed is low and retracting from the outer peripheral portion of the fluid circulatory passage when the rotational speed is high, wherein: said baffle mechanism comprises a plurality of baffle plates which are arranged between the core ring of said pump shell and the core ring of said turbine shell, and a support shaft mounted on the outer periphery of the pump shell to rotatably support said baffle plates at the ends on one side thereof, and a limiting device for limiting the movement of said baffle plates until the rotational speed of said pump reaches a predetermined value, said baffle plates are arranged in a plural number alone said pump shell, and said limiting device comprises spring members arranged among said baffle plates. 47. A fluid coupling comprising:a pump comprising an annular pump shell, an annular core ring, and a plurality of impellers, said pump core ring and said impellers being within said pump shell; and a turbine disposed opposite said pump and comprising an annular turbine shell, an annular core ring, and a plurality of runners, said turbine core ring and said runners being within said turbine shell, said pump shell and said turbine shell forming a fluid circulatory passage; and a baffle mechanism, comprising: a plurality of flap-like baffle plates arranged in the fluid circulatory passage and rotatably supported, at the edges on one side thereof, by an inner peripheral side of the core ring of said pump shell; and a limiting device, responsive to centrifugal force acting on said baffle plates, to bring the edges on the other side of said baffle plates to the central portion of the fluid circulatory passage when the rotational speed of said pump is low, and to bring the edges on said other side of said baffle plates to the inner peripheral side of said core ring of said turbine shell when the rotational speed of said pump is high, wherein said baffle plates are fitted at the other edge portions thereof with weight members. 48. A fluid coupling according to claim 47, wherein said baffle plates are arranged along the core ring of said pump shell.49. A fluid coupling according to claim 47, wherein said limiting device comprises spring members arranged between said plurality of baffle plates and said pump shell.50. A fluid coupling comprising: a pump comprising an annular pump shell, an annular core ring, and a plurality of impellers, said pump core ring and said impellers being arranged in said pump shell;a turbine disposed facing said pump and comprising an annular turbine shell, an annular core ring, and a plurality of runners, said turbine core ring and said runners being arranged in said turbine shell, said pump shell and said turbine shell forming a fluid circulatory passage; a baffle mechanism comprising: a plurality of flap-like baffle plates arranged in the fluid circulatory passage rotatably supported, at the edges on one side thereof, by the inner peripheral portion of the core ring of said turbine shell; and a limiting device responsive to centrifugal force acting on said baffle plates, to bring the edges on the other side of said baffle plates to the central portion of the fluid circulatory passage when the rotational speed of said turbine is low, and to bring the edges on said other side of said baffle plates to the inner peripheral side of the core ring of said pump shell when the rotational speed of said turbine is high. 51. A fluid coupling according to claim 50, wherein said baffle plates are arranged along the core ring of said turbine shell.52. A fluid coupling according to claim 51, wherein said limiting device comprises spring members arranged between the plurality of baffle plates and the turbine shell.53. A fluid coupling according to claim 50, wherein said plurality of baffle plates are fitted at the other edge portions thereof with weight members.54. A fluid coupling comprising:a pump comprising an annular pump shell, and a plurality of impellers arranged in said pump shell; a turbine disposed facing said pump and comprising an annular turbine shell, and a plurality of runners arranged in said turbine shell, said pump shell and said turbine shell forming a fluid circulatory passage; and a baffle mechanism, comprising: a plurality of flap-like baffle plates in the fluid circulatory passage rotatably supported, at the edges on one side thereof, by the inner peripheral portion of said pump shell; weight members mounted on said baffle plates to bring the edges on the other side of said plurality of baffle plates to the inner peripheral side of said turbine shell by centrifugal force; and a limiting device, responsive to the centrifugal force acting on said weight members, to bring the edges on the other side of said baffle plates to the central portion of the fluid circulatory passage when the rotational speed of said pump is low, and to bring the edges on said other side of said baffle plates to the inner peripheral portion of said turbine shell when the rotational speed of said pump is high. 55. A fluid coupling according to claim 54, wherein said baffle plates are arranged along said pump shell.56. A fluid coupling according to claim 54, wherein said limiting device comprises spring members arranged between said baffle plates and said pump shell.57. A fluid coupling comprising:a pump comprising an annular pump shell, and a plurality of impellers arranged in said pump shell; a turbine disposed facing said pump and comprising an annular turbine shell, and a plurality of runners within said turbine shell, said pump shell and said turbine shell forming a fluid circulatory passage; and baffle mechanism, comprising: a plurality of flap-like baffle plates in the fluid circulatory passage and rotatably supported, at the edges on one side thereof, by the inner peripheral portion of said turbine shell; weight members mounted on said baffle plates to bring the edges on the other side of said plurality of baffle plates to the inner peripheral side of said pump by centrifugal force; and a limiting device responsive to the centrifugal force acting on said weight members, to bring the edges on the other side of said baffle plates to the central portion of the fluid circulatory passage when the rotational speed of said turbine is low, and to bring the edges on said other side of said baffle plates to the inner peripheral portion of said pump shell when the rotational speed of said turbine is high. 58. A fluid coupling according to claim 57, wherein said baffle plates are arranged along said turbine shell.59. A fluid coupling according to claim 57, wherein said limiting device comprises spring members arranged between said plurality of baffle plates and said turbine shell.
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