Fluid handling – Systems – With flow control means for branched passages
Reexamination Certificate
2000-09-21
2001-06-26
Fox, John (Department: 3753)
Fluid handling
Systems
With flow control means for branched passages
C303S119300
Reexamination Certificate
active
06250335
ABSTRACT:
BACKGROUND OF THE INVENTION
The present invention relates to an automotive hydraulic modulator used, for example, in the antilock-braking system (ABS) or traction control system.
Japanese Patent Laid-open Publication JP-A-8-80827 discloses an automotive hydraulic modulator used in ABS, which is formed with a pair of first accumulator chambers and a pair of second accumulator chambers.
Japanese Patent Laid-open Publication JP-A-8-285117 discloses a three-dimensionally configured electric wiring structure of a solenoid valve block.
SUMMARY OF THE INVENTION
It is an object of the present invention to provide a hydraulic modulator which is simple in construction and can simply be produced by using a small number of structural members.
It is another object of the present invention to provide a hydraulic modulator which can simply be produced by using a small number of structural members and has terminals each having a secure electrical connection with another member.
According to a first aspect of the present invention, there is provided a hydraulic modulator comprising: (a) a hydraulic modulator block comprising (1) a housing block having therein a hydraulic circuit, (2) a solenoid valve formed on a surface of the housing block, (3) a reservoir, and (4) a damper; and (b) an electronic control block detachably attached to the surface of the hydraulic modulator block such that the hydraulic modulator block and the electronic control block are arranged in a direction. The electronic control block comprises (1) a solenoid valve cover for covering the solenoid valve, (2) an electric wiring pattern attached to the solenoid valve cover and electrically connected with the solenoid valve, and (3) a first circuit board having thereon a first electronic control circuit and electrically connected with the electric wiring pattern. The reservoir and the damper are arranged relative to each other and disposed below the solenoid valve such that the surface of the hydraulic modulator block becomes entirely substantially flat and thus that there is provided in the electronic control block a space directly below the solenoid valve. This space receives therein the first circuit board.
According to a second aspect of the present invention, there is provided a hydraulic modulator comprising (a) a solenoid valve; (b) an electronic control circuit board; and (c) an electric wiring pattern prepared by pressing a metal plate having a first major surface formed with a first tin layer and a nickel layer and a second major surface formed with a second tin layer, into a three-dimensional shape, such that said electric wiring pattern is formed with (1) a first terminal having a surface formed with said first or second tin layer electrically connected with said solenoid valve, (2) a connector terminal having first and second opposed surfaces respectively formed with said first and second tin layers, and (3) a second terminal having a surface formed with said nickel layer electrically connected with said electronic control circuit board.
REFERENCES:
patent: 5022717 (1991-06-01), Heibel et al.
patent: 5395164 (1995-03-01), Sulzyc
patent: 5658056 (1997-08-01), Rischen et al.
patent: 5836355 (1998-11-01), Markulec et al.
patent: 5853231 (1998-12-01), Iwamura et al.
patent: 5937898 (1999-08-01), Gluf, Jr. et al.
patent: 6102494 (2000-08-01), Volz et al.
patent: 195 19 414 (1996-11-01), None
patent: 8-80827 (1996-03-01), None
patent: 8-285117 (1996-11-01), None
Ohishi Yuuji
Otsuka Yukinori
Takahashi Hideaki
Foley & Lardner
Fox John
Unisia Jecs Corporation
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