公开(公告)号：US20230091943A1

公开(公告)日：2023-03-23

申请号：US17909181

申请日：2021-03-26

Applicant: ADVICS CO., LTD.

Inventor： Tomoo HARADA

IPC: F04B1/0408

Abstract: A pump includes: fluid delivery portions each including a volume variable mechanism, a first port and a second port, and a valve mechanism; and a pump flow path formed by the three or more fluid delivery portions being connected in series, in which a movement range of each of pistons includes a maximum volume position, a minimum volume position, and a switching position, and the pump flow path is configured such that a closing movement process (movement between switching position and minimum volume position) in which the piston moves between the switching position and the minimum volume position by driving of a drive device is sequentially shifted from a first inlet/outlet port toward a second inlet/outlet port or from the second inlet/outlet port toward the first inlet/outlet port among the fluid delivery portions

公开(公告)号：US20210180589A1

公开(公告)日：2021-06-17

申请号：US17054583

申请日：2019-05-24

Applicant: ADVICS CO., LTD.

Inventor： Tomokazu AONO ,  Tomoo HARADA

IPC: F04B53/12 ,  F04B53/14

Abstract: In a piston pump, for example, a piston sub assembly includes a columnar plunger that lies along an axial direction, a cap that is fixed with the plunger to cover an adjacent region between a first end surface at one end in the axial direction of the plunger and the first end surface at a first outer circumferential surface of the plunger, and provided with an intake passage extending from an inlet on an outer side of the first outer circumferential surface to an outlet on an outer side of the first end surface outside the plunger, and a first valve seat of a first intake check valve located at the outlet, and a seal member that is a member different from the cap and that prevents leakage of hydraulic fluid from the first chamber through a gap between the first cylinder and the piston sub assembly.

公开(公告)号：US20220003232A1

公开(公告)日：2022-01-06

申请号：US17291422

申请日：2019-12-02

Applicant: ADVICS CO., LTD.

Inventor： Tomoo HARADA

IPC: F04B53/10 ,  F04B19/22

Abstract: A pump includes a fluid outflow mechanism that causes the brake fluid in the discharge chamber to flow out into the suction chamber in accordance with decrease in the volume of the discharge chamber when the feed ring of the valve portion decreases the volume of the discharge chamber in cooperation with the increasing movement of the volume of the first pump chamber in a state where the first pump chamber and the discharge chamber are filled with brake fluid in the suction step.

公开(公告)号：US20180170335A1

公开(公告)日：2018-06-21

申请号：US15737931

申请日：2016-07-15

Applicant: ADVICS CO., LTD.

Inventor： Tomoo HARADA

IPC: B60T8/48 ,  B60T13/14 ,  B60T17/06

CPC classification number: B60T8/4872 ,  B60T8/00 ,  B60T8/17 ,  B60T8/48 ,  B60T13/142 ,  B60T13/148 ,  B60T13/662 ,  B60T15/36 ,  B60T17/06 ,  B60T17/221 ,  B60T2270/203

Abstract: In the present invention, when a first protrusion of a shaft abuts on a guide face thereby pressing a first valve element toward the top as seen in the drawing, the guide face is separated from a cylinder seat face, and a large-diameter oil passage is opened. At this time, when the first protrusion abuts on the guide face thereby driving the first valve element to the position where the valve opens, the first valve element is also pressed in a direction perpendicular to the reciprocating direction of the first valve element because the guide face has a spherical surface or a tapered surface. Thus, the first valve element is supported at two points, point E and point F or G, thereby dampening vibrations.