Method of manufacturing piston of pump for brake system and pump for brake system including the piston

Patent metadata

Field	Value
Publication number	US-10507501-B2
Application number	US-201715600936-A
Country	US
Kind code	B2
Filing date	May 22, 2017
Priority date	May 20, 2016
Publication date	Dec 17, 2019
Grant date	Dec 17, 2019

Abstract

According to the embodiment of the present disclosure, it provides a method of manufacturing a piston of a pump for brake system, the piston fabricated using a piercing process by press forming to have an inlet path communicating with a suction port through which oil is introduced.

First claim

What is claimed is:

1. A pump for brake system comprising:
a piston disposed in a bore formed in a modulator block comprising a suction port and a discharge port, and having a hollow shape in which an inlet path communicating with the suction port is formed, wherein the piston is slidably disposed to be moved in a reciprocating manner within the bore;
an inlet valve provided in the piston;
a seat member provided in the piston, attached to the inlet valve, and having a communication hole opened or closed by the inlet valve;
a valve seat provided in the bore, partially surrounded the piston at a predetermined distance from the piston to form the inlet path as a pressure chamber to press oil, and provided with an orifice;
a piston spring disposed in the pressure chamber to press the piston;
an outlet valve provided on the valve seat to open or close the orifice; and
a cap coupled to the valve seat to support the outlet valve, fixed to the modulator block to open or close an open end of the bore, and forming, by coupling with the valve seat, a discharge chamber connected to the discharge port.

2. The pump for brake system according to claim 1 , wherein the piston is fabricated in a cylindrical shape with one open side by press forming.

3. The pump for brake system according to claim 1 , wherein the piston has a stepped portion to support the seat member.

4. The pump for brake system according to claim 1 , further comprising a filter member disposed at an outer surface of the piston in the bore and configured to filter oil introduced into the bore through the suction port.

5. The pump for brake system according to claim 1 , wherein the inlet path of the piston is divided into the pressure chamber and a reservoir to store oil by the seat member.

Assignees

• Mando Corp

Inventors

• Cho Joo-Un

Classifications

• F04B53/126

  Ball valves · CPC title

• F04B1/0426

  Arrangements for pressing the pistons against the actuated cam; Arrangements for connecting the pistons to the actuated cam · CPC title

• B21D28/28

  in tubes or other hollow bodies · CPC title

• F04B1/0408

  Pistons · CPC title

• F16J10/00

  Engine or like cylinders (pressure vessels in general F16J12/00; cylinders for engines or other apparatus of particular kinds, see the appropriate subclasses, e.g. for combustion engines F02F); Features of hollow, e.g. cylindrical, bodies in general · CPC title