Patents by Inventor L. Nelson Burnett, Jr.

L. Nelson Burnett, Jr. 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).

  • Door closer with assist or door operating features
    Patent number: 4339843
    Abstract: Hydraulic door closer apparatus has associated with it means for counter-balancing the bias of a return spring, to assist in opening the door by reducing the force needed to open it, or to open the door by over-balancing the bias of the return spring. Remotely manually operable means may initiate opening of the door.
    Type: Grant
    Filed: May 27, 1980
    Date of Patent: July 20, 1982
    Assignee: Reading-Dorma Closer Corporation
    Inventor: L. Nelson Burnett, Jr.
  • Door closer with assist or door operating features
    Patent number: 4222147
    Abstract: Hydraulic door closer apparatus includes means for counter-balancing the bias of a return spring, to either assist in opening the door by reducing the force needed to open, or, in an alternative embodiment and mode of operation, to open the door by over-balancing the bias of the return spring. In the latter mode, a remotely manually operable switch, such as, for example, a so-called palm button, may initiate opening the door.
    Type: Grant
    Filed: March 20, 1978
    Date of Patent: September 16, 1980
    Assignee: Reading Door Closer Corp.
    Inventor: L. Nelson Burnett, Jr.