Patents by Inventor Derek Gardner

Derek Gardner 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).

  • Publication number: 20070024458
    Abstract: A leak detector apparatus and system for use with a drop ceiling having a grid-work of ceiling tiles. The leak detector apparatus includes an electrically non-conducting tile body that is shaped and dimensioned to rest on top of a ceiling tile. The tile body comprises multiple layers of non-conducting closed cell-foam and has a plurality of water collector cups formed or positioned therein. Spaced-apart sensor wires are provided and form an electrical grid that extends between the multiple layers of the tile body and the sensor wires generally extend through the water collector cups. The sensor wires are operative to sense the presence of water in the cups. An electronics module is provided at each tile body and is associated with the sensor wires and electrically coupled to the sensor wires for triggering an alert in response to the presence of water in one or more of the cups. A master controller is in communication with the local processors for monitoring the function and operation of each local processor.
    Type: Application
    Filed: July 20, 2006
    Publication date: February 1, 2007
    Inventors: Joseph McGinty, Derek Gardner
  • Patent number: 4342238
    Abstract: An automotive drive system is disclosed including a continuously variable drive system including input and output pulleys and a belt intercoupling the pulleys, a hydrodynamic device, a forward-reverse gear set, a reduction gear set and a differential assembly where the elements are mounted along two axes. The hydrodynamic device, forward-reverse gear set and the input pulley of the continuously variable drive system are mounted along the first axis. The output pulley, the reduction gear set and the differential assembly are mounted along the second axis which is coaxial with the longitudinal axis of the axle shafts. The reduction gear set includes both a high-speed and a high-torque gear train, and the high-torque gear train is an integral element of the final drive differential. The hydrodynamic device includes a lock-up clutch for direct drive through the hydrodynamic device at operating road speeds.
    Type: Grant
    Filed: January 28, 1980
    Date of Patent: August 3, 1982
    Assignee: Borg-Warner Limited
    Inventor: Derek Gardner
  • Patent number: 4235126
    Abstract: A compact automatic transmission of the planetary type adapted for front wheel drive installations including a Ravigneaux gear set and four friction elements whereby 3-forward drive ratios and one reverse ratio may be established, and a first shaft is provided connected directly to the engine and a second shaft being connected to be driven through a hydraulic torque converter. Each of the shafts is connected to drive an element of the gear set whereby a partly hydraulic and partly mechanical drive is provided. In addition, only one friction element need be engaged for each of the ratios established by the transmission.
    Type: Grant
    Filed: June 28, 1978
    Date of Patent: November 25, 1980
    Assignee: Borg-Warner Limited
    Inventor: Derek Gardner
  • Patent number: D247192
    Type: Grant
    Filed: September 7, 1976
    Date of Patent: February 7, 1978
    Assignee: Tyrrell Racing Organisation Limited
    Inventor: Derek Gardner