Patents by Inventor Alexander F. Pless

Alexander F. Pless 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).

  • Elastomeric sliding seal for vacuum bellows
    Patent number: 6231054
    Abstract: An improved bellows assembly (18) is provided for use in, for example, an ion implanter (10). The bellows assembly comprises a first mounting portion (56) located at one end of the bellows assembly for fixedly mounting the bellows assembly to a first vacuum chamber (16); a second mounting portion (54) located at an opposite end of the bellows assembly for slidably mounting the bellows assembly to a second vacuum chamber (15); and a steel bellows (60) located between the first and second mounting portions. The bellows extends generally along a longitudinal axis (64) and is expansible and contractible along this axis. The second mounting portion permits radial slidable movement of the bellows assembly with respect to the second chamber in a first plane substantially perpendicular to this axis.
    Type: Grant
    Filed: December 21, 1998
    Date of Patent: May 15, 2001
    Assignee: Axcelis Technologies, Inc.
    Inventors: Ernest E. Allen, Jr., Robert J. Mitchell, Perry J. I. Justesen, Alexander F. Pless
  • Lateral stress relief mechanism for vacuum bellows
    Patent number: 6065499
    Abstract: An improved bellows assembly (18) is provided for use in, for example, an ion implanter (10). The bellows assembly comprises a first mounting portion (56) located at one end of the bellows assembly for fixedly mounting the bellows assembly to a first vacuum chamber (16); a second mounting portion (52) located at an opposite end of the bellows assembly for slidably mounting the bellows assembly to a second vacuum chamber (15); and a steel bellows (54) located between the first and second mounting portions. The bellows extends generally along a longitudinal axis (64) and is expansible and contractible along this axis. The second mounting portion permits radial slidable movement of the bellows assembly with respect to the second chamber in a first plane substantially perpendicular to this axis. The second mounting portion comprises at least one sliding seal subassembly (80) for maintaining the vacuum, and a support ring (78) and a slide plate (82) located on opposite ends of the sliding seal subassembly.
    Type: Grant
    Filed: December 21, 1998
    Date of Patent: May 23, 2000
    Assignee: Eaton Corporation
    Inventors: Alexander F. Pless, Gary J. Rosen, Allan D. Weed, Ernest E. Allen, Victor M. Benveniste, Perry J. I. Justesen