Patents by Inventor David W. Dranchak

David W. Dranchak 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: 4907975
    Abstract: An assembly for interconnecting two relatively rigid circuit cards using a flexible circuit for forming this connection is provided. The assembly includes a housing which has a first pressure exerting member which has the flexible circuit reeved therearound. Second and third pressure exerting members are provided in spaced juxtaposed relationship against which the opposite legs of the flexible circuit are maintained to define therebetween a slot for the reception of a circuit card. The assembly is inserted into a card substrate with the first pressure exerting means causing the flexible circuit to be biased into contact with the contacts on a substrate. A second circuit card is inserted into the slot between the legs of the flexible circuit, and the second and third pressure exerting members urge each of the legs as the flexible circuit into contact with the second circuit board.
    Type: Grant
    Filed: December 19, 1988
    Date of Patent: March 13, 1990
    Assignee: International Business Machine Corporation
    Inventors: David W. Dranchak, David E. Engle, David E. Hessian, Alan D. Knight, Wai M. Ma, Thomas G. Macek, John J. Squires
  • Patent number: 4892487
    Abstract: An electrical connector assembly including a housing, a flexible circuit located within the housing and including first and second terminals thereon, a carriage movably positioned within the housing and designed for having a circuit board inserted therein, actuation means connected to the carriage to cause it to move and occupy first and second positions within the housing, and biasing means in the form of a pair of leaf springs which continuously exert biasing force against the carriage during its positioning within the invention's housing. As defined herein, contact is possible between a plurality of individual contact elements which form part of the circuit board and respective terminals located at one end portion of the flexible circuit. Second terminals located at the other end of the flexible circuit are designed for mating with and contacting respective conductors located on the second circuit device.
    Type: Grant
    Filed: June 15, 1989
    Date of Patent: January 9, 1990
    Assignee: IBM Corporation
    Inventors: David W. Dranchak, David E. Engle, Alan D. Knight