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    • 1. 发明专利
    • HYDRAULICALLY DRIVEN PUMP
    • JP2001263251A
    • 2001-09-26
    • JP2000077842
    • 2000-03-15
    • ITO KAZUICHI
    • ITO KAZUICHI
    • F04B1/16F04B9/111F04B15/06F04B43/02F04B43/06F04B43/067
    • PROBLEM TO BE SOLVED: To increase a degree of freedom of setting a position for arranging pump body part and pump driving part when arranging the pump driving part outside a hydraulic fluid by immersing the pump body part in the hydraulic fluid. SOLUTION: This hydraulically driven pump has the pump body part 3 arranged inside the hydraulic fluid stored in a vessel C and the pump driving part 2 arranged outside the hydraulic fluid, and the pump driving part 2 forcibly sends the hydraulic fluid by driving the pump body part 3 via hydraulic pressure transmitted via a hydraulic pressure transmitting pipe 4. The pump body part 3 has a pair of pump elements 31, and the respective pump elements 31 have a pump chamber 38 partitioned by a cylindrical flexible film 37, a suction valve 34 and a delivery valve 36 continuing with the pump chamber 38 and a hydraulic pressure chamber 39 arranged outside the pump chamber 38 so as to face to the flexible film 37. The pump driving part 2 has a pair of plungers 13 actuated by a swash plate 16 rotatably driven by a driving source 14, and the hydraulic pressure generated by the respective plungers 13 is transmitted to the hydraulic pressure chamber 39 of the corresponding pump elements 31.
    • 3. 发明专利
    • SPEED CHANGE GEAR
    • JPH02212651A
    • 1990-08-23
    • JP3204289
    • 1989-02-10
    • ITO KAZUICHI
    • ITO KAZUICHI
    • F16H15/50F16H15/52
    • PURPOSE:To enable the reduction of local friction of a rolling body and the like through enlargement of a speed change range by a method wherein rotation of an input shaft is transmitted to the rolling body, and the rolling body is revolved as it is rotated in a state to make contact with first and second guide surfaces and a guide groove. CONSTITUTION:When, by a transmission gear, a cylinder member 5 is moved laterally, a round part 6a of a rolling body 6 engaged with a guide groove 26 is moved laterally in a state to be engaged with the groove 26, and inclination of the rolling body 6 is changed. However, since a size relation is established among first and second guide surfaces 14 and 17, the groove 26, the round part 6a of the rolling body 6, and a spherical part 6b, even when inclination is changed, a contact state therebetween can be held. Since through rotation of an input shaft 2, a force, by which an input member 10 is forced to approach the rolling body 6, is exerted on the input member, contact of the rolling body 6 with the guide surfaces 14 and 17 and the groove 26 is further ensured. Rotation of the input member 10 occasioned by rotation of the input shaft 2 is transmitted to the rolling body 6, the rolling body 6 is revolved as it is rotated in a state that the rolling body is brought into contact with the guide surfaces 14 and 17 and the groove 26. A current differential action causes the change of the speed of rotation of the input shaft 2 to transmit it to an output shaft 3.
    • 5. 发明专利
    • JPH0138198B2
    • 1989-08-11
    • JP3616583
    • 1983-03-05
    • ITO KAZUICHI
    • ITO KAZUICHI
    • F04B43/02F04B43/067
    • PURPOSE:To make a discharge fluid rate alterable at will, by securing a spherical body tight to an input shaft being connected to a motor output shaft, while setting up a driving swash plate rockably on the circumference of this spherical body. CONSTITUTION:An input shaft 4 is shiftably connected to a motor output shaft 3 axially, while a spherical body 6 is secured tight to a tip end of the input shaft 4, and a fulcrum shaft 7 is solidly connected to the input shaft 4 of the spherical body 6 and a part at the opposite side as one body, while a driving swash plate 9 is supported on the circumference of the spherical body 6 so as to cause it to be solidly rotated by a Woodruff key 10 and to make it rockable axially. With this constitution, following rotation of these output and input shafts 3 and 4, a tilt angle in the driving swash plate 9 can be altered without altering the bottom dead point position of a piston 26 to be driven for reciprocation by the driving swash plate 9 so that the quantity of the fluid discharged out of a pump chamber 34 can be optionally altered.
    • 6. 发明专利
    • ROTARY PUMP
    • JPS57108486A
    • 1982-07-06
    • JP18352080
    • 1980-12-24
    • ITO KAZUICHI
    • ITOU KAZUICHI
    • F04C5/00
    • PURPOSE:To reduce pulsation in a captioned pump by giving pumping work to a pair of pump chambers provided in a pump casing on the basis of eccentric wheels different in their phases by 180 deg. for joining fluids discharged from these pump chambers with pulsations different in their phases by 180 deg.. CONSTITUTION:A pair of eccentric wheels 14 and 14 are fitted on a pump shaft 7 via bearings 8 and 9 to be axially separated as keeping the phase difference of 180 deg. circumferentially. A pair of diaphragms 24 are equipped on outer circumferences of these eccentric wheels 14 and 14. A pair of pump chambers P are provided between the peripheries of diaphramgs 24 and the inside of a pump casing 1. Each pump chamber P is hermetically partitioned by a partition 36 into a suction chamber Pi connected to a suction port 42 and a discharge chamber Pe connected to a discharge port 43. This construction permits to join fluids of different pulsation phases by 180 deg. discharged from a pair of pump chambers Pi and Pe by the eccentric motion of the eccentric wheel 14 for reducing pulsations greatly.
    • 7. 发明专利
    • ROTARY PUMP
    • JPS56143385A
    • 1981-11-09
    • JP4668980
    • 1980-04-09
    • ITO KAZUICHI
    • ITOU KAZUICHI
    • F04C5/00F04C11/00F04C14/00
    • PURPOSE:To prevent the leakage of a fluid supplied under pressure, by using an annular diaphragm to keep the fluid from coming into contact with a rotating section. CONSTITUTION:The turning force of a pump shaft 4 is transmitted to a wedge 10 through the medium of the flat bottom 7 of a recess. The turning force is transmitted further to a bearing 9 through the action of the wedge 10 and to an annular diaphragm 12 to elastically deform it. Since the annular diaphragm 12 adjacent to a partation member 16 is always put in pressure contact with the recess 3 of the inside surface of a pump casing C by the radial pushing force of the partition member 16, a crescent pump chamber 9 is divided into a suction chamber connected to a suction fluid 17 and a discharge chamber connected to a discharge passage 18 no matter where the pump chamber 9 is located. As a result, a fluid supplied under pressure is kept from coming into contact with a rotating section. The fluid is thus prevented from leaking.