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Patent Searching and Data


Title:
PUMP DEVICE AND BRAKE CONTROL APPARATUS
Document Type and Number:
WIPO Patent Application WO/2019/138858
Kind Code:
A1
Abstract:
Provided is a pump device capable of effectively reducing a pulse pressure. The pump device is provided with: a motor; a rotary shaft which is rotated by the motor; a drive unit including a cam which is disposed on the outer circumference of the rotary shaft and which is eccentric to the rotation axis of the rotary shaft; and a plurality of plunger pumps which are disposed on the outer circumference of the drive unit and which are operated in directions orthogonal to the rotation axis. When N is an integer equal to or greater than 2, the plurality of plunger pumps are disposed to form N lines that are shifted from one another in the direction in which the rotation axis extends. The total number of the plunger pumps is an odd number.

Inventors:
YAMASAKI, Hiromasa (2520, Takaba, Hitachinaka-sh, Ibaraki 03, 〒3128503, JP)
MISUNO, Masaki (2520, Takaba, Hitachinaka-sh, Ibaraki 03, 〒3128503, JP)
NAKAZAWA, Chiharu (2520, Takaba, Hitachinaka-sh, Ibaraki 03, 〒3128503, JP)
Application Number:
JP2018/047471
Publication Date:
July 18, 2019
Filing Date:
December 25, 2018
Export Citation:
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Assignee:
HITACHI AUTOMOTIVE SYSTEMS, LTD. (2520, Takaba Hitachinaka-sh, Ibaraki 03, 〒3128503, JP)
International Classes:
F04B1/053
Foreign References:
JPH03281986A1991-12-12
JPS5698581A1981-08-08
JPS488643B1
Attorney, Agent or Firm:
ONO, Shinjiro et al. (YUASA AND HARA, Section 206 Shin-Otemachi Bldg., 2-1, Otemachi 2-chome, Chiyoda-k, Tokyo 04, 〒1000004, JP)
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