Universal door safety system
First Claim
1. A safety system for universal attachment to existing garage door openers having a door operator with a main control circuit, an electric motor and a reversible drive train connected from the motor to the door, the main control circuit providing any one of four modes of operation of door opening, door stopped open, door closing, and door stopped closed, comprising, in combination:
- a safety control circuit;
monitor means responsive to an obstruction to door closing movement and connected to said safety control circuit;
an output from said safety control circuit for connection to the main control circuit of the existing garage door opener;
door movement responsive means including a flexible member connectable for movement with actual movement of the door and connected to said safety control circuit; and
determining means in said safety control circuit connected to be responsive to actual movement of said flexible member to determine if the door is closing and connected to said monitor means to be responsive to an obstruction to door closing movement to apply a signal to the main control circuit to at least stop the door in its closing movement.
6 Assignments
0 Petitions
Accused Products
Abstract
A safety system is disclosed for universal attachment to existing garage door openers. A transmitter of infrared energy transmits a beam laterally of the door opening to detect any obstruction to door closing movement. A safety control circuit is adapted for connection to the main control circuit of the existing garage door opener, the existing push button switch is disconnected from the main control circuit and connected to the new safety control circuit, a flexible cable or cord is connected for actual movement in accordance with movement of the door and is connected to the safety control circuit at a reel on which the cord is wound, and the safety control circuit determines if there is actual door movement and actual door closing movement, as well as being responsive to an obstruction to door closing movement to apply a signal to stop the door and then apply another signal to start the door in its opening movement.
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Citations
27 Claims
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1. A safety system for universal attachment to existing garage door openers having a door operator with a main control circuit, an electric motor and a reversible drive train connected from the motor to the door, the main control circuit providing any one of four modes of operation of door opening, door stopped open, door closing, and door stopped closed, comprising, in combination:
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a safety control circuit; monitor means responsive to an obstruction to door closing movement and connected to said safety control circuit; an output from said safety control circuit for connection to the main control circuit of the existing garage door opener; door movement responsive means including a flexible member connectable for movement with actual movement of the door and connected to said safety control circuit; and determining means in said safety control circuit connected to be responsive to actual movement of said flexible member to determine if the door is closing and connected to said monitor means to be responsive to an obstruction to door closing movement to apply a signal to the main control circuit to at least stop the door in its closing movement. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14)
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15. A safety system for universal attachment to existing garage door openers having a door operator with a main control circuit, an electric motor and a reversible drive train connected to provide opening and closing movement to the door relative to a door frame opening, comprising, in combination;
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a transmitter and a receiver of a beam of energy; means mounting said transmitter and receiver to project an energy beam transversely of the door movement to be responsive to an interruption of the beam by an obstruction to door closing movement; a safety control circuit; an output from said safety control circuit for connection to the main control circuit of the existing garage door opener; controllable switch means connected to said safety control circuit to initiate at least two of four modes of operation of door opening, door stopped open, door closing, and door stopped closed; door movement responsive means responsive to actual movement of the door and connected to said safety control circuit; and determining means in said safety control circuit connected to said responsive means and to said energy beam receiver to determine if the door is closing and to determine the presence of an obstruction to door closing movement to apply a signal to the main control circuit to stop the door in its closing movement. - View Dependent Claims (16, 17, 18, 19, 20, 21, 22, 23, 24, 25)
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26. A safety system for universal attachment to existing garage door openers having a door operator with a main control circuit, an electric motor and a reversible drive train connected to provide opening and closing movement to the door relative to a door frame opening, comprising, in combination:
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monitor means responsive to an obstruction to door closing movement; a safety control circuit responsive to said monitor means to be responsive to an obstruction to door closing movement; controllable switch means normally connected to the main control circuit to initiate at least two of four modes of operation of door opening, door stopped open, door closing, and door stopped closed; means to disconnect said controllable switch means from said main control circuit; and means connecting said safety control circuit between said controllable switch means and the main control circuit, whereby said safety control circuit is adapted to stop the door in its closing movement upon said monitor means determining the presence of an obstruction to door closing movement. - View Dependent Claims (27)
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Specification