Invention Application

  • Patent Title: VANE PUMP
  • Application No.: US17600566
    Application Date: 2020-03-16
  • Publication No.: US20220170459A1
    Publication Date: 2022-06-02
  • Inventor: Masamichi SUGIHARA
  • Applicant: KYB Corporation
  • Applicant Address: JP Tokyo
  • Assignee: KYB Corporation
  • Current Assignee: KYB Corporation
  • Current Assignee Address: JP Tokyo
  • Priority: JP2019-078491 20190417
  • International Application: PCT/JP2020/011467 WO 20200316
  • Main IPC: F04C2/344
  • IPC: F04C2/344
VANE PUMP
Abstract:
A vane pump includes: pump chambers formed by a rotor, a cam ring, and vanes; a first suction port that guides working fluid guided by a suction passage to the pump chambers; a second suction port that guides the working fluid guided from the suction passage through a communication passage to the pump chambers; and a return passage to which excessive fluid of the working fluid discharged from the pump chambers is guided. The return passage has: a body-internal passage through which the excessive fluid flows along an axis direction at an outer side of the cam ring in a radial direction; and a turning passage that reverses the excessive fluid guided through the body-internal passage towards the second suction port.
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