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61. 发明专利

JPS62361B2 失效
公开(公告)号：JPS62361B2
公开(公告)日：1987-01-07
申请号：JP246778
申请日：1978-01-12
申请人： SANYO KIKI KK
发明人： YANO MASAHIRO
IPC分类号： F15B11/02 , F15B11/08 , F15B13/04 , F15B13/10

62. 实用新型

JPS6023523Y2 失效
公开(公告)号：JPS6023523Y2
公开(公告)日：1985-07-13
申请号：JP442480
申请日：1980-01-18
IPC分类号： F15B13/10 , B66F3/26 , B66F3/43 , F15B15/08 , F15B15/14

63. 实用新型

JPS5930244Y2 JPS5930244Y2 - 失效
公开(公告)号：JPS5930244Y2
公开(公告)日：1984-08-29
申请号：JP13874674
申请日：1974-11-16
IPC分类号： F15B11/16 , F15B13/10

64. 发明专利

JPS5844883B2 失效
公开(公告)号：JPS5844883B2
公开(公告)日：1983-10-06
申请号：JP3101575
申请日：1975-03-14
申请人： DEERE & CO
发明人： HOORU EDOMUNDO HANSAA , UIRIAMU RII SUNAIDAA
IPC分类号： F16K11/16 , F15B13/04 , F15B13/10

65. 发明专利

JPS58163875A HYDRAULIC CHANGE OVER VALVE FOR RECIPROCATING HYDRAULIC CYLINDER 失效
公开(公告)号：JPS58163875A
公开(公告)日：1983-09-28
申请号：JP4473182
申请日：1982-03-23
申请人： MITSUBISHI HEAVY IND LTD
发明人： MATSUZAWA KUNIHIKO , FURUKAWA YOSHITERU , AKIYAMA TAKAYUKI
IPC分类号： F16K11/07 , A01B63/10 , F15B13/10
摘要： PURPOSE:To enable a hydraulic change-over valve to be used for agricultural tractors or the like in a wide range such that working machines can be operated in holding, lifting, free floating conditions and forcible descending. CONSTITUTION:A reciprocating hydraulic cylinder D for operatively moving up and down a working machine C is driven by a hydraulic change-over valve E. When said valve E is in the position shown in the drawing a cylinder connecting port is shut off to hold the hydraulic cylinder D. When said valve E is in the left adjacent position, a pressure port, a tank port and connection ports of both cylinders are interconnected to float the hydraulic cylinder D. When said valve E is in the extremity of the left end position, the hydraulic cylinder D is withdrawn to forcibly lower the working machine C. Also, when said valve E is in the extreme right end position, the hydraulic cylinder D is projected to lift the working machine C.

66. 发明专利

JPS57500842A JPS57500842A - 失效
公开(公告)号：JPS57500842A
公开(公告)日：1982-05-13
申请号：JP50096981
申请日：1980-06-16
IPC分类号： F15B13/042 , F15B13/10
CPC分类号： F15B13/0422

67. 发明专利

JPS55123001A HYDRAULIC CONTROL CIRCUIT 失效
公开(公告)号：JPS55123001A
公开(公告)日：1980-09-22
申请号：JP3022879
申请日：1979-03-14
申请人： KAWASAKI HEAVY IND LTD
发明人： MATSUBARA MASAMI , TANAKA YOUHEI
IPC分类号： F15B13/10 , F15B9/08
摘要： PURPOSE:To prevent the fluctuation in the position of a controlled object due to changeover in a hydraulic controller for regulating the position by an electro- hydraulic servo valve, by eliminating pressure fluctuation in oil chambers on both the sides of a piston at the time of the changeover from the holding state of a hydraulic circuit to its control state. CONSTITUTION:When the position of a stopper 6 for regulating the opening of a container 7 of continuous casting equipemnt is controlled, an unload changeover valve 2 is in a position (b) and a changeover valve 11 is in a position (a). The position control is effected by adjusting the degree of opening of a servo valve 3 depending on the difference between a command and the present position detected by a position detector 9. When the changeover valve 2 is shifted to a position (a) in that state, a pump 1 is unloaded and a holding circuit is formed. If a pressure fall takes place in the feed and drain ducts 12, 13 of a cylinder 5, a liquid is supplemented from an accumulator 15 through the changeover valve 11. As a result, no pressure fluctuation takes place in oil chambers 5b, 5c and the position of the stopper 6 is prevented from fluctuating.

68. 发明专利

JPS5535563B2 失效
公开(公告)号：JPS5535563B2
公开(公告)日：1980-09-16
申请号：JP2728974
申请日：1974-03-11
IPC分类号： F15B13/10 , F15B13/01

69. 发明专利

JPS5531254B2 失效
公开(公告)号：JPS5531254B2
公开(公告)日：1980-08-16
申请号：JP6804371
申请日：1971-09-06
IPC分类号： E02F9/22 , E02F3/85 , F15B9/08 , F15B13/10

70. 发明专利

JPS5517245B2 失效
公开(公告)号：JPS5517245B2
公开(公告)日：1980-05-10
申请号：JP2510772
申请日：1972-03-10
IPC分类号： F15B11/08 , F15B13/10

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