Patents by Inventor Edward Charles Ruffell

Edward Charles Ruffell 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).

  • Bellows for optical equipment
    Patent number: 5825461
    Abstract: Bellows (14) for optical equipment comprising a tubular concertina structure of adjustable axial length, the folds of the concertina structure acting as hinges, the structure having portions of laminated construction, a first layer of the construction being of flexible light-inhibiting material (66) and a further layer (70) being of load-bearing material which stiffens the folds whereby upon axial adjustment the bellows retains its configuration without external support or restraint.
    Type: Grant
    Filed: May 11, 1995
    Date of Patent: October 20, 1998
    Assignee: Panavision Europe Limited
    Inventor: Edward Charles Ruffell