×

Reversing apparatus for powered vehicle door systems

  • US 5,069,000 A
  • Filed: 03/22/1990
  • Issued: 12/03/1991
  • Est. Priority Date: 03/22/1990
  • Status: Expired due to Fees
First Claim
Patent Images

1. In a device having at least one movable member driven by an electric motor along a predetermined path, an apparatus for detecting an obstruction in the travel path traversed by the member, said apparatus comprising:

  • first means for monitoring an instantaneous electric current provided to the electric motor to produce a first analog signal representative of the instantaneous amplitude of the motor current;

    second means for monitoring an average electric current provided to the electric motor over a predetermined time interval to produce a second analog signal representative of the average amplitude of the motor current; and

    control means for producing a first control signal when the amplitude of said first signal exceeds the amplitude of said second signal by a predetermined amount whereby said first control signal indicates that the movable member has encountered an obstruction in its path.

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