Patents by Inventor Chris Dunn

Chris Dunn 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: 12068010
    Abstract: A PZT microactuator such as for a hard disk drive has a restraining layer bonded on its side that is opposite the side on which the PZT is mounted. The restraining layer comprises a stiff and resilient material such as stainless steel. The restraining layer can cover most or all of the top of the PZT, with an electrical connection being made to the PZT where it is not covered by the restraining layer. The restraining layer reduces bending of the PZT as mounted and hence increases effective stroke length, or reverses the sign of the bending which increases the effective stroke length of the PZT even further. The restraining layer can be one or more active layers of PZT material that act in the opposite direction as the main PZT layer. The restraining layer(s) may be thinner than the main PZT layer.
    Type: Grant
    Filed: June 20, 2023
    Date of Patent: August 20, 2024
    Assignee: Magnecomp Corporation
    Inventors: David Glaess, Kuen Chee Ee, Long Zhang, Chris Dunn
  • Publication number: 20230335155
    Abstract: A PZT microactuator such as for a hard disk drive has a restraining layer bonded on its side that is opposite the side on which the PZT is mounted. The restraining layer comprises a stiff and resilient material such as stainless steel. The restraining layer can cover most or all of the top of the PZT, with an electrical connection being made to the PZT where it is not covered by the restraining layer. The restraining layer reduces bending of the PZT as mounted and hence increases effective stroke length, or reverses the sign of the bending which increases the effective stroke length of the PZT even further. The restraining layer can be one or more active layers of PZT material that act in the opposite direction as the main PZT layer. The restraining layer(s) may be thinner than the main PZT layer.
    Type: Application
    Filed: June 20, 2023
    Publication date: October 19, 2023
    Inventors: David Glaess, Kuen Chee Ee, Long Zhang, Chris Dunn
  • Patent number: 11694716
    Abstract: A PZT microactuator such as for a hard disk drive has a restraining layer bonded on its side that is opposite the side on which the PZT is mounted. The restraining layer comprises a stiff and resilient material such as stainless steel. The restraining layer can cover most or all of the top of the PZT, with an electrical connection being made to the PZT where it is not covered by the restraining layer. The restraining layer reduces bending of the PZT as mounted and hence increases effective stroke length, or reverses the sign of the bending which increases the effective stroke length of the PZT even further. The restraining layer can be one or more active layers of PZT material that act in the opposite direction as the main PZT layer. The restraining layer(s) may be thinner than the main PZT layer.
    Type: Grant
    Filed: December 20, 2021
    Date of Patent: July 4, 2023
    Assignee: Magnecomp Corporation
    Inventors: David Glaess, Kuen Chee Ee, Long Zhang, Chris Dunn
  • Publication number: 20220115036
    Abstract: A PZT microactuator such as for a hard disk drive has a restraining layer bonded on its side that is opposite the side on which the PZT is mounted. The restraining layer comprises a stiff and resilient material such as stainless steel. The restraining layer can cover most or all of the top of the PZT, with an electrical connection being made to the PZT where it is not covered by the restraining layer. The restraining layer reduces bending of the PZT as mounted and hence increases effective stroke length, or reverses the sign of the bending which increases the effective stroke length of the PZT even further. The restraining layer can be one or more active layers of PZT material that act in the opposite direction as the main PZT layer. The restraining layer(s) may be thinner than the main PZT layer.
    Type: Application
    Filed: December 20, 2021
    Publication date: April 14, 2022
    Inventors: David Glaess, Kuen Chee Ee, Long Zhang, Chris Dunn
  • Patent number: 11205449
    Abstract: A PZT microactuator such as for a hard disk drive has a restraining layer bonded on its side that is opposite the side on which the PZT is mounted. The restraining layer comprises a stiff and resilient material such as stainless steel. The restraining layer can cover most or all of the top of the PZT, with an electrical connection being made to the PZT where it is not covered by the restraining layer. The restraining layer reduces bending of the PZT as mounted and hence increases effective stroke length, or reverses the sign of the bending which increases the effective stroke length of the PZT even further. The restraining layer can be one or more active layers of PZT material that act in the opposite direction as the main PZT layer. The restraining layer(s) may be thinner than the main PZT layer.
    Type: Grant
    Filed: April 23, 2020
    Date of Patent: December 21, 2021
    Assignee: Magnecomp Corporation
    Inventors: David Glaess, Kuen Chee Ee, Long Zhang, Chris Dunn
  • Publication number: 20200327904
    Abstract: A PZT microactuator such as for a hard disk drive has a restraining layer bonded on its side that is opposite the side on which the PZT is mounted. The restraining layer comprises a stiff and resilient material such as stainless steel. The restraining layer can cover most or all of the top of the PZT, with an electrical connection being made to the PZT where it is not covered by the restraining layer. The restraining layer reduces bending of the PZT as mounted and hence increases effective stroke length, or reverses the sign of the bending which increases the effective stroke length of the PZT even further. The restraining layer can be one or more active layers of PZT material that act in the opposite direction as the main PZT layer. The restraining layer(s) may be thinner than the main PZT layer.
    Type: Application
    Filed: April 23, 2020
    Publication date: October 15, 2020
    Inventors: David Glaess, Kuen Chee Ee, Long Zhang, Chris Dunn
  • Publication number: 20160085975
    Abstract: A secure processing facility has a plurality of workstations, with associated computers to provide data to, and/or receive data from, the workstations. The computers are provided with a visual display unit, and display machine-readable data codes on the display. The computers are provided with a scanner to read the machine-readable data codes on the display of another of the computers. The computers have no other connection to receive or transmit machine readable data. A method of operating the facility includes processing a workpiece at a first workstation. A display of the computer of the first workstation displays a data code containing data related to the processing of the workpiece. The scanner of the computer associated with a second workstation scans the data code. The workpiece is transferred from the first workstation to the second workstation. The workpiece is processed at the second workstation.
    Type: Application
    Filed: September 18, 2014
    Publication date: March 24, 2016
    Applicant: SAFENET, INC.
    Inventors: Iqbal Dar, Chao Jiang, Chris Dunn, Shailesh Gajera
  • Publication number: 20120216052
    Abstract: A computer system comprises a first region including a base image in the form of machine readable code stored on a non-volatile storage medium, a second region including a machine image in the form of machine readable code stored on a non-volatile storage medium, and a deduplicator. The second region machine image comprises a base part sufficiently similar to the base image for deduplication, and a part special to the second region machine image. The first region base image and the second region machine image are deduplicated by the deduplicator. The second region special part is encrypted by full disk encryption using a key not available to the first region. Methods of, and computer programs for, implementing such a system are described.
    Type: Application
    Filed: October 12, 2011
    Publication date: August 23, 2012
    Applicant: SAFENET, INC.
    Inventor: Chris Dunn
  • Publication number: 20120179904
    Abstract: A host computer cloud has a processor and supports a virtual machine. An agent under control of a user is in communication with the cloud over a network. A key management server is in communication with the cloud over a network. The cloud stores the virtual machine in the form of a virtual encrypted disk on a non-volatile storage medium. When commanded by the agent, the cloud requests a disk-wrapping key from the key management server and decrypts the encrypted disk using the disk-wrapping key.
    Type: Application
    Filed: November 14, 2011
    Publication date: July 12, 2012
    Applicant: SafeNet, Inc.
    Inventors: Chris Dunn, Russell Dietz, Philip Snyder, Alan H. Frindell
  • Patent number: 7523549
    Abstract: A method of fabricating a flexible circuit interconnect comprising a conductive pattern on a flexible substrate comprising layers of different components having different coefficients of thermal expansion, including exposing the flexible substrate sequentially to different temperature regimes tending to differentially expand the flexible circuit components, dimensionally stabilizing the flexible substrate with an added stainless steel layer only during said exposing to different temperature regimes, and removing stainless steel of the added layer from the flexible circuit after exposing the flexible circuit.
    Type: Grant
    Filed: May 9, 2005
    Date of Patent: April 28, 2009
    Assignee: Magnecomp Corporation
    Inventors: Christopher Schreiber, Chris Dunn
  • Publication number: 20060026876
    Abstract: A display includes a support on which a sign is hung depending downwardly. The support has a vertically elongated rod on which it is supported that is guided vertically through two guides that are vertically spaced from one another to permit the rod to slide up and down on the guides. Adjacent the lower guide, a locking mechanism is provided including a slot. At the lower end of the rod, a handle is provided that also includes structure allowing it to be interlocked with the slot of the locking mechanism to hold the vertically elongated rod and display in its uppermost position. The handle may be unhooked from the locking mechanism with the vertically elongated rod being pivoted about its axis of elongation, whereupon the rod with the display attached are lowered together. In the lowermost position of the display, the display may be changed or even cleaned.
    Type: Application
    Filed: August 4, 2004
    Publication date: February 9, 2006
    Inventors: Walter Murphy, Dena Johnston, Chris Dunn, Tom Jordan
  • Publication number: 20050231396
    Abstract: A method of scalable audio compression includes bitplane coding of frequency-domain transform coefficients, where newly-significant coefficient locations within the current bitplane are identified using runlength codes. Reordering coefficients prior to bitplane coding such that same-frequency coefficients are clustered together has the effect of increasing coding efficiency. The invention is applicable to both full-bandwidth and layered bitplane coding.
    Type: Application
    Filed: May 12, 2003
    Publication date: October 20, 2005
    Applicant: Scala Technology Limited
    Inventor: Chris Dunn
  • Patent number: D584528
    Type: Grant
    Filed: December 3, 2007
    Date of Patent: January 13, 2009
    Assignee: Masco Retail Cabinet Group, LLC
    Inventors: Terence Neff, Chris Dunne
  • Patent number: D584529
    Type: Grant
    Filed: December 3, 2007
    Date of Patent: January 13, 2009
    Assignee: Masco Retail Cabinet Group, LLC
    Inventors: Terence Neff, Chris Dunne
  • Patent number: D584902
    Type: Grant
    Filed: December 3, 2007
    Date of Patent: January 20, 2009
    Assignee: Masco Retail Cabinet Group, LLC
    Inventors: Terence Neff, Chris Dunne