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Device for indicating low tire pressure

  • US 4,646,673 A
  • Filed: 09/09/1983
  • Issued: 03/03/1987
  • Est. Priority Date: 09/09/1983
  • Status: Expired due to Fees
First Claim
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1. A device for indicating low compressed air pressure inflation in a vehicle tire having a rim and a valve stem with said rim as well as a rear-view mirror for the driver on at least one side of the vehicle, said device comprising:

  • means for attaching the device to the tire rim;

    a hose connectable to said valve stem of said tire and containing means for communicating with the compressed air therein;

    a body connected to and in communication with the interior of said hose for receiving compressed air from said hose;

    an indicator which serves for visual indication of low pressure in tire inflation and which is pivotably attached to said body in a location remote from said hose, the indicator having a means connected therewith;

    actuating means disposed in said body and responsive to the pressure of said compressed air for selectively holding said indicator in a first operating position during operation of the tire in a properly inflated state, and releasing said indicator, upon a drop in the pressure of said compressed air below a predeterminded level, to allow said indicator to pivot and assume a second, low-pressure position of visual indication of low pressure in tire inflation;

    said actuating means including a member adapted to mate with said means connected therewith such that said indicator is constrained from pivotal movement; and

    resilient means external to and connected to the body said resilient means being means for effecting said pivotal movement of said indicator to said second, low-pressure position upon release of said indicator by operation of said actuating means to release said indicator from being constrained from pivotal movement;

    said device being structured such that said release of said indicator is followed by pivotal movement of said indicator into said second low-pressure position such that said indicator is visible to a driver or occupant inside a vehicle when the device is mounted on a tire rim of that vehicle.

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