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Brake system metering valve with a pressure actuated brake switch

  • US 5,390,987 A
  • Filed: 03/08/1993
  • Issued: 02/21/1995
  • Est. Priority Date: 03/08/1993
  • Status: Expired due to Fees
First Claim
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1. A valve for a vehicle hydraulic brake system having a master cylinder and at least one wheel brake, the valve comprising:

  • a valve housing having a bore formed therein, said housing including an inlet port formed therein and communicating with said bore, said inlet port adapted to be connected to the master cylinder, said housing further including an outlet port formed therein and communicating with said bore, said outlet port adapted to be connected to the wheel brake;

    a brake switch attached to said housing; and

    a metering valve disposed within said valve housing bore between said inlet and outlet ports, said metering valve operable to prevent communication between said inlet and outlet ports when hydraulic pressure is initially applied to said inlet port, said metering valve connected to a shiftable metering valve element disposed within said valve housing bore to actuate said brake switch, said shiftable metering valve element being shifted when hydraulic pressure is initially applied to said inlet port to actuate said brake switch.

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