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Auxiliary brake system for four-wheel-drive vehicle

  • US 5,531,515 A
  • Filed: 05/08/1995
  • Issued: 07/02/1996
  • Est. Priority Date: 05/08/1995
  • Status: Expired due to Fees
First Claim
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1. An auxiliary brake system for a four-wheel-drive vehicle which operates in conjunction with the vehicle'"'"'s hydraulic brake system, comprising:

  • an electrically actuated, normally open, spring return solenoid valve in fluid communication with the left front brake line of said vehicle'"'"'s braking system;

    an electrically actuated, normally open, spring return solenoid valve in fluid communication with the right front brake line of said vehicle'"'"'s braking system;

    an electrically actuated, normally open, spring return solenoid valve in fluid communication with the left rear brake line of said vehicle'"'"'s braking system;

    an electrically actuated, normally open, spring return solenoid valve in fluid communication with the right rear brake line of said vehicle'"'"'s braking system; and

    engaging means for selectively controlling a plurality of combinations of said solenoids, wherein said engaging means comprises;

    a contact closure push-button in electrical communication and control with the electrically actuated, normally open, spring return solenoid in fluid communication with the left front brake line of said vehicle'"'"'s braking system;

    a contact closure push-button in electrical communication and control with the electrically actuated, normally open, spring return solenoid valve in fluid communication with the right front brake line of said vehicle'"'"'s braking system;

    a contact closure push-button in electrical communication and control with the electrically actuated, normally open, spring return solenoid valve in fluid communication with the left rear brake line of said vehicle'"'"'s braking system; and

    a contact closure push-button in electrical communication and control with the electrically actuated, normally open, spring return solenoid valve in fluid communication with the right rear brake line of said vehicle'"'"'s braking system.

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