×

Vehicle impact sensor

  • US 5,408,214 A
  • Filed: 04/30/1992
  • Issued: 04/18/1995
  • Est. Priority Date: 04/30/1992
  • Status: Expired due to Fees
First Claim
Patent Images

1. An impact sensor for a motor vehicle, comprising:

  • at least two sensing members disposable in spaced apart relation on a motor vehicle and effective for sensing an impact with an obstacle and generating a signal in response thereto, each sensing member comprising a telescoping support member normally biased in an extended alarm-ready position, the telescoping support member having a first telescope member and a second telescope member defining an interior space having a volume, the first telescope member being dimensioned and configured to slideably move relative to the second telescope member in a telescoping manner so that the telescoping support member contracts from the extended alarm-ready position to a contracted alarm-generate position in response to a force of impact, each sensing member also comprising relative position sensing means for sensing when the first telescope member moves relative to the second telescope member in a telescoping manner and generating the signal when the telescoping support member contracts to the alarm-generate position each said sensing member further comprising a gas disposed in the interior space so that when the first telescope member moves relative to the second telescope member in response to an impact, the volume becomes smaller and a pressure of the gas becomes greater;

    force transferring means comprising a rigid member supportable by the spaced apart sensing members so that a deflection of the rigid member caused by the force of impact between the rigid member and the obstacle is transferred to at least one sensing member so that upon contact with the obstacle the rigid member deflects and causes at least one of the telescoping support members to contract to the alarm-generate position;

    urging means associated with each sensing member for constantly urging the first telescope member in an outwardly telescoping manner relative to the second telescope member so that the rigid member is always disposed at a position relative to the motor vehicle effective to cause at least one of the telescoping support members to contract to the alarm-generate position upon contact between the obstacle and the rigid member, the urging means also for returning the telescoping support member to the extended alarm-ready position when there is no contact with the obstacle;

    a spring disposed in the interior space effective for urging the first telescope member in an outwardly telescoping manner relative to the second telescope;

    a one-way valve in communication with the interior space and effective for maintaining the gas at an ambient pressure during a period of no-impact; and

    alarm generating means receptive of the signal for generating an alarm in response thereto to warn a driver of the motor vehicle of the contact with the obstacle, the alarm generating means including a pressure detector for detecting a change in the pressure of the gas and being effective for generating an alarm when a predetermined change in the pressure of the gas is detected.

View all claims
  • 0 Assignments
Timeline View
Assignment View
    ×
    ×