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1. 发明专利

JPS5614727A PHASE COMPARATOR OF DIGITAL PLL CIRCUIT 失效
公开(公告)号：JPS5614727A
公开(公告)日：1981-02-13
申请号：JP9045579
申请日：1979-07-18
申请人： HITACHI LTD
发明人： TAKAHASHI YASUFUMI , KITA YASUO
IPC分类号： H03L7/06 , H03D13/00 , H03K5/26 , H03L7/089
摘要： PURPOSE:To obtain a stable clock by obtaining a clock signal that apparently synchronizes with input data when no input signal arrives. CONSTITUTION:To set input signal 1A applied to terminal D at the point in time when 90 deg. out-of-phase signal 4B to be input to terminal T rises, ''0'' is set to FF10 at the point in time t1. This setting ''0'' continues up to the point in time t2 and at t2, signal 10A, appearing at output Q of FF10, changes from ''0'' to ''1''. To FF11, on the other hand, the state of signal 1A applied to terminal D at the point in time when an inverted 90 deg. out-of-phase signal obtained via inverter 12 rises is set. Therefore, ''1'' is set to FF11 at time t3 and this state continues up to time t4. At time t4, ''0'' is set to FF11 since input signal 1A is in the ''0'' state. Then, this state continues.

2. 发明专利

JP2000161245A GEAR PUMP, FUEL FEEDING DEVICE USING GEAR PUMP, AND GEAR MOTOR 失效
公开(公告)号：JP2000161245A
公开(公告)日：2000-06-13
申请号：JP33880798
申请日：1998-11-30
申请人： HITACHI LTD
发明人： HEIKO KENJI , AKASAKA YOSHIMICHI , NOGAMI TADAHIKO , KADOMUKAI YUZO , TAKAHASHI YUKIO , SAITO JUNJI , KITA YASUO
IPC分类号： F02M37/04 , F02M59/12 , F02M59/44 , F04C2/08 , F04C2/18 , F04C15/00
摘要： PROBLEM TO BE SOLVED: To obtain a gear pump and a fuel feeding device which can realize a small size and a light weight, as well as can reduce the inner leakagein a simple structure, and can obtain a high efficiency and a high discharge pressure in a wide scope from a low rotation area to a high rotation area. SOLUTION: A sealed casing 37; a driving gear 31 and a driven gear 32 which suck and discharge a fluid by engaging each other in the casing 37, and have a shaft respectively; a side plate 34 to hold the gears rotatable and slidable; and a sealing member 38 to partition and seal the pressure side connecting to a suction port at the antigear side of the side plate, and the pressure side connecting to a discharge port 35; are provided. And a sealing member 38 is provided in order to make the suction port 35 part, and the periphery of a driving gear shaft 31a, into a suction port pressure area, and the periphery of a driven gear shaft 32a into a discharge port pressure area.

3. 发明专利

JPS6333738B2 失效
公开(公告)号：JPS6333738B2
公开(公告)日：1988-07-06
申请号：JP9045579
申请日：1979-07-18
申请人： HITACHI LTD
发明人： TAKAHASHI YASUFUMI , KITA YASUO
IPC分类号： H03L7/06 , H03D13/00 , H03K5/26 , H03L7/089

4. 发明专利

JP2007032580A Gear pump 审中-公开
标题翻译：齿轮泵
公开(公告)号：JP2007032580A
公开(公告)日：2007-02-08
申请号：JP2006306117
申请日：2006-11-13
申请人： Hitachi Ltd , 株式会社日立製作所
发明人： HEIKO KENJI , KADOMUKAI YUZO , TAKAHASHI YUKIO , OKUNA KENJI , KITA YASUO
IPC分类号： F04C2/18
摘要： PROBLEM TO BE SOLVED: To use a seal block-shaped gear pump in a fuel system of an engine for a vehicle.
SOLUTION: In this gear pump provided with a drive gear and a driven gear meshing mutually in a sealed gear case, side plates for sealing side faces of both gears, and a sealing member for sealing a tooth tip, the sealing member is provided among a plurality of tooth tips in the vicinity of a meshing part on a low pressure side separately from the gear case, a suction port is formed by the sealing member and the side plates, the inside of the gear case except the meshing part of both gears and the sealed parts is formed as a high pressure zone where pressure is increased for the suction port, and a pressure dividing seal is provided on the side plate and has cross section like stairs or a shaft of the driven gear is not restrained to the case to support rotation reaction force of an inside part composed of both gears and the sealing member in a central part of a rear surface of the sealing member.
COPYRIGHT: (C)2007,JPO&INPIT
摘要翻译：要解决的问题：在车辆用发动机的燃料系统中使用密封块状齿轮泵。解决方案：在该齿轮泵中，设置有驱动齿轮和从动齿轮相互啮合在密封齿轮箱中，用于密封两个齿轮的侧面的侧板和用于密封齿尖的密封构件，密封构件设置在与齿轮箱分开的低压侧的啮合部附近的多个齿尖之间，由密封部件和侧板形成吸入口，除了齿轮箱的啮合部分的啮合部分外两个齿轮和密封部分形成为用于吸入口的压力增加的高压区域，并且在侧板上设置有分压密封件，并且具有如楼梯的横截面或从动齿轮的轴不被限制在密封构件的后表面的中心部分支撑由两个齿轮和密封构件构成的内部的旋转反作用力的情况。版权所有（C）2007，JPO＆INPIT

5. 发明专利

JPH10252589A FUEL SYSTEM AND GEAR PUMP OF ENGINE FOR VEHICLE 失效
公开(公告)号：JPH10252589A
公开(公告)日：1998-09-22
申请号：JP5736297
申请日：1997-03-12
申请人： HITACHI LTD
发明人： HEIKO KENJI , KADOMUKAI YUUZOU , TAKAHASHI YUKIO , OKUNA KENJI , KITA YASUO
IPC分类号： F02M37/00 , F02M37/04 , F02M37/06
摘要： PROBLEM TO BE SOLVED: To prevent occurrence of cavitation in a fuel pump by forming a low pressure fuel circulating hole in a seal member for sealing the tips of a pair of gears, taking a meshing part of both bears and the case interior except a seal part as a high pressure fuel circulating part, and providing a gear pump, a tip seal angle of which is specified. SOLUTION: In a fuel system of an engine for a vehicle to which a seal block type gear pump 3 is applied, fuel is injected from a fuel injection valve, a suction port 35 serving as a suction circulating hole is formed on both side plates of the gear pump 3, and a seal member (hereinafter referred to as a seal block) 33 is for sealing the tips of a pair of gears near the suction port 35 is provided. The seal block 33 is provided separately from a gear case, and provided between one to two tips near the low pressure side meshing part. A low pressure fuel circulating hole is formed on the seal block. The meshing part of both gears 31, 32 and the case interior except a seal part are taken as a high pressure fuel circulating part, and the tip seal angle is set about 35 deg.±5 deg. (number of teeth = 14-18).

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