Patents by Inventor Lawrence Harrell, IV

Lawrence Harrell, IV has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Patent number: 11299914
    Abstract: A latch dogging assembly comprises an electromagnet and an actuator mounted on a bracket. A guide slide is pivotally mounted on the bracket with a lead block coupled to the guide slide. A guide pin rides along an inner surface of the bracket causing the guide slide to pivot. A pawl is slidably engaged with the guide slide. A guide link includes a post. An armature is mounted to the panic bar and the post engages the pawl. When the actuator is energized to move the lead block, the pawl engages the post to pivot the armature and thereby cause the panic bar to move from the extended position to the depressed position. When the electromagnet is energized the armature is magnetically held preventing reverse pivoting of the guide link. A method for fully retracting a door latch is also provided.
    Type: Grant
    Filed: August 23, 2019
    Date of Patent: April 12, 2022
    Assignee: Hanchett Entry Systems, Inc.
    Inventors: John Brennan, Larry Gene Corwin, Jr., Lawrence Harrell, IV, Robert W. Lewis
  • Patent number: 11035150
    Abstract: A latch dogging assembly comprises an electromagnet and an actuator mounted on a bracket. A guide slide is pivotally mounted on the bracket with a lead block coupled to the guide slide. A guide pin rides along an inner surface of the bracket causing the guide slide to pivot. A pawl is slidably engaged with the guide slide. A guide link includes a post. An armature is mounted to the panic bar and the post engages the pawl. When the actuator is energized to move the lead block, the pawl engages the post to pivot the armature and thereby cause the panic bar to move from the extended position to the depressed position. When the electromagnet is energized the armature is magnetically held preventing reverse pivoting of the guide link. A method for fully retracting a door latch is also provided.
    Type: Grant
    Filed: April 6, 2017
    Date of Patent: June 15, 2021
    Assignee: Hanchett Entry Systems, Inc.
    Inventors: John Brennan, Larry Gene Corwin, Jr., Lawrence Harrell, IV, Robert W. Lewis
  • Publication number: 20190383063
    Abstract: A latch dogging assembly comprises an electromagnet and an actuator mounted on a bracket. A guide slide is pivotally mounted on the bracket with a lead block coupled to the guide slide. A guide pin rides along an inner surface of the bracket causing the guide slide to pivot. A pawl is slidably engaged with the guide slide. A guide link includes a post. An armature is mounted to the panic bar and the post engages the pawl. When the actuator is energized to move the lead block, the pawl engages the post to pivot the armature and thereby cause the panic bar to move from the extended position to the depressed position. When the electromagnet is energized the armature is magnetically held preventing reverse pivoting of the guide link. A method for fully retracting a door latch is also provided.
    Type: Application
    Filed: August 23, 2019
    Publication date: December 19, 2019
    Applicant: Hanchett Entry Systems, Inc.
    Inventors: John Brennan, Larry Gene Corwin, JR., Lawrence Harrell, IV, Robert W. Lewis
  • Publication number: 20170292294
    Abstract: A latch dogging assembly comprises an electromagnet and an actuator mounted on a bracket. A guide slide is pivotally mounted on the bracket with a lead block coupled to the guide slide. A guide pin rides along an inner surface of the bracket causing the guide slide to pivot. A pawl is slidably engaged with the guide slide. A guide link includes a post. An armature is mounted to the panic bar and the post engages the pawl. When the actuator is energized to move the lead block, the pawl engages the post to pivot the armature and thereby cause the panic bar to move from the extended position to the depressed position. When the electromagnet is energized the armature is magnetically held preventing reverse pivoting of the guide link. A method for fully retracting a door latch is also provided.
    Type: Application
    Filed: April 6, 2017
    Publication date: October 12, 2017
    Applicant: Hanchett Entry Systems, Inc.
    Inventors: John BRENNAN, Larry Gene Corwin, JR., Lawrence Harrell, IV, Robert W. Lewis