Patents by Inventor Alan A. Sadler

Alan A. Sadler 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: 5214733
    Abstract: A duct is provided for receiving an optical fibre member by blowing. The duct is formed at least in part of a plastics material which is electrically conductive or has electrically conductive material such as carbon black held therein or has an electrically conductive material applied thereto preferably the duct has a radially inner layer defining an inside wall of the duct and at least one further layer positioned outwardly of the inner layer, the inner layer being formed of the plastics material which is electrically conductive or has electrically conductive material held therein or had an electrically conductive material applied thereto.
    Type: Grant
    Filed: April 23, 1991
    Date of Patent: May 25, 1993
    Assignees: BICC PLC, Corning Limited
    Inventor: Alan A. Sadler
  • Patent number: 5042907
    Abstract: A coated optical fibre assembly suitable for blowing through a microduct, said assembly comprising at least one optical fibre and having an external coating comprising a radiation-cured polymer containing particulate matter.
    Type: Grant
    Filed: May 30, 1989
    Date of Patent: August 27, 1991
    Assignees: Imperial Chemical Industries, PLC and Fibres Optical
    Inventors: Michael N. Bell, Robert A. Head, Mark R. Paterson, Aidan P. J. Cadden, Graham R. Handley, Alan A. Sadler
  • Patent number: 4976519
    Abstract: An optical fibre cable comprises an inner sheath containing at least one optical fibre member, and an outer sheath containing the inner sheath. The inner sheath is of a material which is soft and has a low modulus of elasticity. The outer sheath of a material having bulk properties, such as density and stiffness, and surface properties, such as surface texture and friction such that the cable can be propelled along a duct by a flow of air travelling along the duct. An intermediate sheath may be provided between the inner and outer sheaths.
    Type: Grant
    Filed: June 22, 1988
    Date of Patent: December 11, 1990
    Assignees: BICC plc, Corning Limited
    Inventors: Rodney J. Davey, Alan A. Sadler
  • Patent number: 4930860
    Abstract: An optical fibre cable comprises a plurality of optical fibre structures each of which comprises an optical fibre surrounded by at least one sheath layer. The optical fibre structures are separably held together side-by-side. The optical fibre cable is propellable along a tubular pathway by fluid drag of a gaseous medium passing over the cable, and each of the individual optical fibre structures is preferably also so propellable when the said structures are separated from one another.
    Type: Grant
    Filed: June 16, 1988
    Date of Patent: June 5, 1990
    Assignees: BICC plc, Corning Limited
    Inventors: John A. Tansey, Rodney J. Davey, Alan A. Sadler