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    • 2. 发明专利
    • MULTIFUNCTIONAL VANE PUMP
    • JPH0361690A
    • 1991-03-18
    • JP19529889
    • 1989-07-27
    • TOYODA MACHINE WORKS LTDTOYOOKI KOGYO KK
    • HONAGA SUSUMUYAMAMORI MOTOYASUHANDA TAKESHIMIZUNO SATOSHI
    • F04C25/02F04C18/344
    • PURPOSE:To individually and freely determine both vacuum capacity and compressive capacity by forming an inner circumferential surface on a vacuum side having a shape corresponding to the vacuum capacity and an inner circumferential surface on a compressive side having a shape corresponding to the compressive capacity in the inner circumferential surface where the tip end of each vane is brought into contact. CONSTITUTION:The tip end of each vane 4 is moved according to the rotation of a rotor 1 in contact with an inner circumferential surface 14 on a vacuum side. Pressure chambers 12 divided by the vanes 4 are expanded or contracted corresponding to the shape of the inner circumferential surface on the vacuum side so that gas is sucked from a first suction port 18 at the vacuum capacity corresponding to the shape. The tip end of each vane 4 is moved in contact with an inner circumferential surface 16 on a compressive side. The pressure chambers 12 are expanded or contracted corresponding to the shape of the inner circumferential surface on the compressive side so that gas is sucked and compressed from a second suction port 22 at the compressive capacity corresponding the shape. The compressed gas is discharged from an outlet 24. Therefore, the shape of the inner circumferential surface 12 on the vacuum side can be determined according to the vacuum capacity, and moreover, the shape of the inner circumferential surface 16 on the compressive side can be determined according to the compressive capacity.
    • 3. 发明专利
    • VANE TYPE GAS PUMP
    • JPH0337392A
    • 1991-02-18
    • JP17096889
    • 1989-06-30
    • TOYODA MACHINE WORKS LTDTOYOOKI KOGYO KK
    • NARUMI TADATAKAHONAGA SUSUMUYAMAMORI MOTOYASUSEKINE SADAOHANDA TAKESHI
    • F04C18/344
    • PURPOSE:To improve sealing performance by forming a cut-in part having a specific curvature having a rotor as center between a suction port and a discharge port on the inner peripheral surface in the peripheral direction of a hollow hole on a pump housing and sealing the leak of gas fro the outer peripheral surface of the rotor by the cut-in part. CONSTITUTION:A rotor 17 having a plurality of vanes 18 which are slidable in the radial direction on the circumference is accommodated in rotatable manners into a hollow hole 11 on a pump housing 10, and the rotor 17 is installed concentrically onto a rotary shaft 15. The inner edge part of each vane 18 is attached onto the supporting rings 21 and 22 which can be floating-revolved. In the hollow hole 11 of such a vane type gas pump, on the inner peripheral surface between discharge port 33 and a suction port 31 at the position in the circumferential direction where the distance in the radial direction from the outer peripheral surface of the rotor 17 becomes shortest, a cut-in part L which is worked with a radius (d1) which is obtained by adding the necessary min. clearance for preventing the contact of the outer peripheral surface of the rotor 17 with the inner peripheral surface of the hollow hole 11 during the revolution of the rotor 17 is formed on the radius (d) of the rotor 17 from the center D of the rotor 17.
    • 4. 发明专利
    • MULTIFUNCTIONAL VANE PUMP
    • JPH0361691A
    • 1991-03-18
    • JP19529989
    • 1989-07-27
    • TOYODA MACHINE WORKS LTDTOYOOKI KOGYO KK
    • HONAGA SUSUMUYAMAMORI MOTOYASUHANDA TAKESHIMIZUNO SATOSHI
    • F04C25/02F04C18/344
    • PURPOSE:To obtain adequate vacuum and discharge pressures despite of a compact size by setting distances where first and second suction ports are intercommunicated to pressure chambers at 2 pitches or more, intercommunicating the first suction port to the pressure chambers over 1 pitch or more in an expansion process, and setting a distance between an outlet and the second suction port at 2 pitches or more. CONSTITUTION:Pressure chambers 10 are contracted according to the rotation of a rotor 1, and a first suction port 12 is intercommunicated over 2 pitches or more of the pressure chambers 10 and vanes 4. In an expansion process, the suction port 12 is intercommunicated to the pressure chambers 10 over 1 pitch or more so that sufficient gas is sucked into the pressure chambers 10. Gas to be compressed can be increased in compressive pressure to be discharged from an outlet 14. In addition, since a distance between the outlet 14 and a second suction port 16 is twice as long as the pitch of the vanes 4, any leak of gas from the outlet 14 to the second suction port 16 can be restricted despite of a large difference in pressure, thereby preventing deterioration in the vacuum pressure of the second suction port 16. Moreover, the second suction port 16 is intercommunicated over 2 or more pitches of the pressure chambers 10 and the vanes 4 so that the gas can be sufficiently sucked from the second suction port 16 to the pressure chambers 10, thus enhancing the vacuum pressure of the second suction port 16.
    • 5. 发明专利
    • OIL FEEDING DEVICE FOR GAS PUMP
    • JPH04209989A
    • 1992-07-31
    • JP33923190
    • 1990-11-30
    • TOYODA MACHINE WORKS LTDTOYOOKI KOGYO KK
    • HONAGA SUSUMUIWAMOTO KOICHIYAMAMORI MOTOYASUIWASE TADAOSEKINE SADAO
    • F04C29/02
    • PURPOSE:To prevent lubricating oil from overflowing or becoming short in a pump by providing a pair of oil separators in mid course of a compressed air feeding line in series and sucking and returning oil separated in downstream oil separator by an oil pump rotated integrally with a gas pump. CONSTITUTION:In a vane pump 1 as a gas pump, when a rotor 7 is rotated, air is sucked from a vacuum tank 8 to a pump chamber P through a suction port 11, and then compressed by contraction of the pump chamber P and fed to a compressed air feeding line 2 through a discharge port 12. In this case, two oil separators 31 and 33 are provided in mid course of the compressed air feeding line 2 in series, and an oil conducting line 33 for the oil separator 31 on the upstream side is connected to a top wall of a closed oil tank 5. On the other hand, an oil conducting line 34 for a downstream oil separator 32 is connected to a suction port 41 of an oil pump 4. Then a discharge port 42 of the oil pump 4 is connected to a side wall of the tank 5 through an oil discharge line 54. Thus oil separated in the downstream oil separator 32 is sucked forcibly to the oil pump 4 and collected to the tank 5.