Patents by Inventor David Fordham

David Fordham 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: 20230421967
    Abstract: An electrostatic transducer, a diaphragm (2) therefor, and corresponding methods of manufacture are disclosed. The electrostatic transducer is preferably for use in a motor vehicle. A composite laminated diaphragm (2) is manufactured by providing a first insulating layer (4), providing a conductive layer (6) on a surface of the first insulating layer (4), and bonding a second insulating layer (10) to the conductive layer (6) such that the second insulating layer (10) extends over the conductive layer (6). The first and second insulating layers (4, 10) each comprise a sheet of uncharged insulating material. The thickness of the composite laminated diaphragm (2) is less than 20 ?m.
    Type: Application
    Filed: September 14, 2023
    Publication date: December 28, 2023
    Inventors: Benjamin Martin LISLE, Julian David FORDHAM, James HEDGES, David Rhys LEWIS
  • Patent number: 11825265
    Abstract: An electrostatic transducer, a diaphragm (2) therefor, and corresponding methods of manufacture are disclosed. The electrostatic FIG. 1 transducer is preferably for use in a motor vehicle. A composite laminated diaphragm (2) is manufactured by providing a first insulating layer (4), providing a conductive layer (6) on a surface of the first insulating layer (4), and bonding a second insulating layer (10) to the conductive layer (6) such that the second insulating layer (10) extends over the conductive layer (6). The first and second insulating layers (4, 10) each comprise a sheet of uncharged insulating material. The thickness of the composite laminated diaphragm (2) is less than 20 ?m.
    Type: Grant
    Filed: May 7, 2020
    Date of Patent: November 21, 2023
    Assignee: WARWICK ACOUSTICS LIMITED
    Inventors: Benjamin Martin Lisle, Julian David Fordham, James Hedges, David Rhys Lewis
  • Publication number: 20220210579
    Abstract: An electrostatic transducer, a diaphragm (2) therefor, and corresponding methods of manufacture are disclosed. The electrostatic FIG. 1 transducer is preferably for use in a motor vehicle. A composite laminated diaphragm (2) is manufactured by providing a first insulating layer (4), providing a conductive layer (6) on a surface of the first insulating layer (4), and bonding a second insulating layer (10) to the conductive layer (6) such that the second insulating layer (10) extends over the conductive layer (6). The first and second insulating layers (4, 10) each comprise a sheet of uncharged insulating material. The thickness of the composite laminated diaphragm (2) is less than 20 ?m.
    Type: Application
    Filed: May 7, 2020
    Publication date: June 30, 2022
    Inventors: Benjamin Martin LISLE, Julian David FORDHAM, James HEDGES, David Rhys LEWIS
  • Patent number: 8820353
    Abstract: Disclosed is a multipart valve assembly. The assembly can be used in selectively coupling two vehicles. The assembly includes inter-fitting male and female components and associated control valves. Coupling the male and female components establishes media (fluid or gas), communications, and electrical paths between space vehicles. This permits the passage of media from one vehicle to the other and likewise enables one vehicle to operate the control valve of the other vehicle.
    Type: Grant
    Filed: June 29, 2011
    Date of Patent: September 2, 2014
    Assignee: Carleton Technologies, Inc.
    Inventors: Tom Yandle, David Fordham
  • Patent number: 8636021
    Abstract: A non-magnetic latching servo actuated valve under the control of a controller comprising a motor in rotational communication with a lead screw. The lead screw advances or retracts a valve stem connected to a valve stem cap. The valve stem cap has a valve stem cap passage. A valve end cap having a valve seat is provided and receives the valve stem cap such that the valve stem cap can contact the valve seat. A pressure relief device or shuttle assembly is positioned internal to the valve stem cap. The shuttle assembly is used for venting build-up downstream pressure through the non-magnetic latching servo actuated valve outlet, through the valve stem cap passage, around the shuttle assembly, through passages, into a pressure chamber, and to the nonmagnetic latching servo actuated valve exit where the fluid vents until the system is in balance.
    Type: Grant
    Filed: April 12, 2010
    Date of Patent: January 28, 2014
    Assignee: Carleton Technologies, Inc.
    Inventors: Mark G. Hansson, Byron K. Steiff, David Fordham, Donald Blackman, Paul Schamell, Tom Yandle
  • Publication number: 20120000575
    Abstract: Disclosed is a multipart valve assembly. The assembly can be used in selectively coupling two vehicles. The assembly includes inter-fitting male and female components and associated control valves. Coupling the male and female components establishes media (fluid or gas), communications, and electrical paths between space vehicles. This permits the passage of media from one vehicle to the other and likewise enables one vehicle to operate the control valve of the other vehicle.
    Type: Application
    Filed: June 29, 2011
    Publication date: January 5, 2012
    Applicant: CONAX FLORIDA CORPORATION
    Inventors: Tom Yandle, David Fordham
  • Publication number: 20110180165
    Abstract: A non-magnetic latching servo actuated valve under the control of a controller comprising a motor in rotational communication with a lead screw. The lead screw advances or retracts a valve stem connected to a valve stem cap. The valve stem cap has a valve stem cap passage. A valve end cap having a valve seat is provided and receives the valve stem cap such that the valve stem cap can contact the valve seat. A pressure relief device or shuttle assembly is positioned internal to the valve stem cap. The shuttle assembly is used for venting build-up downstream pressure through the non-magnetic latching servo actuated valve outlet, through the valve stem cap passage, around the shuttle assembly, through passages, into a pressure chamber, and to the nonmagnetic latching servo actuated valve exit where the fluid vents until the system is in balance.
    Type: Application
    Filed: April 12, 2010
    Publication date: July 28, 2011
    Applicant: Conax Florida Corporation
    Inventors: Mark Hansson, Byron K. Steiff, David Fordham, Don Blackman, Paul Schamell