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Powered sliding door safety system

  • US 4,621,452 A
  • Filed: 01/18/1985
  • Issued: 11/11/1986
  • Est. Priority Date: 01/18/1985
  • Status: Expired due to Fees
First Claim
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1. A safety system for powered sliding doors which close a door opening by using door moving means for slideably moving a leading edge of a door across the door opening to a closed position comprising:

  • transmitter means mounted adjacent the door opening in a stationary manner for projecting a beam of energy in a predetermined illuminating pattern from a side of said door opening adjacent said closed position across the door opening toward the leading edge in a direction approximately parallel to the direction of movement of said door;

    reflecting means mounted on the door adjacent said leading edge for reflecting the energy beam projected by the transmitter means toward an edge of the door opening, along a direction transverse to the direction of movement for said door; and

    energy detecting means secured in a stationary manner adjacent said door opening so as to receive said redirected beam of energy, while the door is closing.

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