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Patent Searching and Data


Title:
PUMP DEVICE
Document Type and Number:
WIPO Patent Application WO/2017/104844
Kind Code:
A1
Abstract:
One embodiment of this pump device comprises: a shaft that rotates around a central axis extending in the axial direction; a motor unit that rotates the shaft in both directions; and a pump unit that is positioned on one side of the motor unit in the axial direction and is driven by the motor unit, via the shaft. The pump unit has: a pump gear attached to the shaft; a pump body having a pump chamber and a through-hole, said pump chamber being recessed from a surface on one side in the axial direction towards the other side in the axial direction and housing the pump gear, and said through-hole opening at both ends in the axial direction, having the shaft penetrating therethrough, and having an opening on one side in the axial direction that opens into the pump chamber; an annular seal member positioned in the through-hole and sealing between the pump chamber and the motor unit; a first port and a second port that are connected to the pump chamber and are capable of sucking oil into the pump chamber and discharging oil from the pump chamber; and an oil passage having a first opening that opens into a section in the through-hole that is between the seal member and the pump chamber and a second opening that opens to the outside surface of the pump unit, in the radial direction, and connects to the first opening.

Inventors:
KOBAYASHI YOSHIYUKI (JP)
HIGUCHI KOJI (JP)
Application Number:
PCT/JP2016/087681
Publication Date:
June 22, 2017
Filing Date:
December 16, 2016
Export Citation:
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Assignee:
NIDEC TOSOK CORP (JP)
International Classes:
F04C2/10; F04C14/04; F04C15/00
Foreign References:
JP2007292005A2007-11-08
JPS4920703A1974-02-23
JP2014163277A2014-09-08
JPH0193388U1989-06-20
DE102008053318A12010-04-29
JP2014233182A2014-12-11
US20110206549A12011-08-25
Attorney, Agent or Firm:
KITAMURA, Hideaki (JP)
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