Patents Assigned to Trams Enterprises, Inc.
  • Patent number: 4970491
    Abstract: A convenient, reliable, and economical low tire pressure alert system (10) for a vehicle provides a graphic display (14) of low tire conditions to a vehicle occupant. The preferred alert system includes a transmitter (12) coupled with a valve stem of each vehicle tire for sensing a respective low pressure condition of the tire and for producing and transmitting digitally encoded amplitude modulated wireless signals in response. The preferred alert system (10) also includes a plurality of indicators (16) as part of a graphic display (14) representative of the vehicle tires, and a receiver (18) coupled with the indicators (16) for selective actuation thereof in response to reception of the low tire pressure signals.
    Type: Grant
    Filed: April 3, 1989
    Date of Patent: November 13, 1990
    Assignee: Trams Enterprises, Inc.
    Inventors: August Saint, Robert L. Berger