Patents by Inventor David Langman Cook

David Langman Cook 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).

  • In Line rewirable switch device
    Patent number: 6007377
    Abstract: An in line switch device (1) includes a switch housing (3, 4) providing a switch component chamber. A switch actuator (8, 9) is operable from the exterior of the switch housing (3, 4). At least two sets of switch terminals (17, 18, 19, 20, 21, 22) are accessible from the exterior of the switch component chamber and are covered by a removable closure or respective removable closures (26, 27). The removable closure(s) has two cable apertures (28) for passage of respective power cables to be connected to respective sets of switch terminals (17, 18, 19, 20, 21, 22). A first sealing device (29, 30) is associated with each cable aperture (28) for sealing around the associated power cable. The removable closure(s) (26, 27) are engaged with the switch housing (3, 4) with one or more second sealing devices (14, 15) provided at the interface between the or each removable closure (26, 27) and the housing (3, 4).
    Type: Grant
    Filed: February 20, 1998
    Date of Patent: December 28, 1999
    Assignee: PDL Holdings Limited
    Inventor: David Langman Cook
  • In-line rewirable switch device
    Patent number: D401908
    Type: Grant
    Filed: August 18, 1997
    Date of Patent: December 1, 1998
    Assignee: PDL Holdings Limited
    Inventor: David Langman Cook