Patents by Inventor Joel N. Erdman

Joel N. Erdman 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).

  • Publication number: 20190302145
    Abstract: Terminals (2, 502) of a device under test (DUT) are connected to corresponding contact pads or leads by a series of electrically conductive contacts. Each terminal testing connects with both a “force” contact and a “sense” contact. In one embodiment, the sense contact (770) partially or completely laterally surrounds the force contact (700). In order to increase the contact surface, the force contact, in a spring pin (700) configuration contacts the device under test terminal at that portion of the lead which is curved or angled, rather than orthogonal to the pin.
    Type: Application
    Filed: March 28, 2019
    Publication date: October 3, 2019
    Inventors: Joel N. Erdman, Jeffrey C. Sherry, Gary W. Michalko
  • Patent number: 10247755
    Abstract: Terminals (2, 502) of a device under test (DUT) are connected to corresponding contact pads or leads by a series of electrically conductive contacts. Each terminal testing connects with both a “force” contact and a “sense” contact. In one embodiment, the sense contact (770) partially or completely laterally surrounds the force contact (700). In order to increase the contact surface, the force contact, in a spring pin (700) configuration contacts the device under test terminal at that portion of the lead which is curved or angled, rather than orthogonal to the pin.
    Type: Grant
    Filed: May 2, 2016
    Date of Patent: April 2, 2019
    Assignee: Johnstech International Corporation
    Inventors: Joel N. Erdman, Jeffrey C. Sherry, Gary W. Michalko
  • Publication number: 20160320429
    Abstract: Terminals (2, 502) of a device under test (DUT) are connected to corresponding contact pads or leads by a series of electrically conductive contacts. Each terminal testing connects with both a “force” contact and a “sense” contact. In one embodiment, the sense contact (770) partially or completely laterally surrounds the force contact (700). In order to increase the contact surface, the force contact, in a spring pin (700) configuration contacts the device under test terminal at that portion of the lead which is curved or angled, rather than orthogonal to the pin.
    Type: Application
    Filed: May 2, 2016
    Publication date: November 3, 2016
    Inventors: Joel N. Erdman, Jeffrey C. Sherry, Gary W. Michalko
  • Patent number: 9329204
    Abstract: Terminals (2, 502) of a device under test (DUT) are connected to corresponding contact pads or leads by a series of electrically conductive contacts. Each terminal testing connects with both a “force” contact and a “sense” contact. In one embodiment, the sense contact (770) partially or completely laterally surrounds the force contact (700). In order to increase the contact surface, the force contact, in a spring pin (700) configuration contacts the device under test terminal at that portion of the lead which is curved or angled, rather than orthogonal to the pin.
    Type: Grant
    Filed: October 12, 2012
    Date of Patent: May 3, 2016
    Assignee: Johnstech International Corporation
    Inventors: Joel N. Erdman, Jeffrey C. Sherry, Gary W. Michalko
  • Patent number: 8988090
    Abstract: Terminals (2, 502) of a device under test (DUT) are connected to corresponding contact pads or leads by a series of electrically conductive contacts. Each terminal testing connects with both a “force” contact and a “sense” contact. In one embodiment, the sense contact (770) partially or completely laterally surrounds the force contact (700). In order to increase the contact surface, the force contact, in a spring pin (700) configuration contacts the device under test terminal at that portion of the lead which is curved or angled, rather than orthogonal to the pin.
    Type: Grant
    Filed: October 19, 2011
    Date of Patent: March 24, 2015
    Assignee: Johnstech International Corporation
    Inventors: Joel N. Erdman, Jeffrey C. Sherry, Gary W. Michalko
  • Publication number: 20140103949
    Abstract: Terminals of a device under test are connected to corresponding contact pads or leads by a series of electrically conductive contacts. Each terminal testing connects with both a “force” contact and a “sense” contact. In one embodiment, the sense contact partially or completely laterally surrounds the force contact, so that it need not have its own resiliency. The sense contact has a forked end with prongs that extend to opposite sides of the force contact. Alternatively, the sense contact surrounds the force contact and slides laterally to match a lateral translation component of a lateral cross-section of the force contact during longitudinal compression of the force contact. Alternatively, the sense contact includes rods that have ends on opposite sides of the force contact, and extend parallel.
    Type: Application
    Filed: October 15, 2013
    Publication date: April 17, 2014
    Inventors: Joel N. Erdman, Jeffrey C. Sherry, Gary W. Michalko
  • Patent number: 8690597
    Abstract: A floating or compliant plate test socket device and method is disclosed. Three primary components, a fixed frame (20) receives a floating or compliant plate (22), sit together atop a housing (24) which contains contact pins used for the electrical test of the DUT (device under test). In fixed plate (20) are bearings for reducing friction when the floating plate is driven downward by the DUT inserter. Embedded in sidewalls (40) are a plurality of vertical raceways (46) which receive bearings (48). The raceways are borings, which have gap in the boring, in the fixed plate sidewalls (40) with the boring center spaced from the sidewall sufficiently that part of the bore removes part of the sidewall but allows the ball bearings to partially protrude from the gap formed in the incomplete semicircular boarding without the bearings being able to freely escape.
    Type: Grant
    Filed: April 26, 2012
    Date of Patent: April 8, 2014
    Assignee: Johnstech International Corporation
    Inventor: Joel N. Erdman
  • Patent number: 8558554
    Abstract: Terminals of a device under test are connected to corresponding contact pads or leads by a series of electrically conductive contacts. Each terminal testing connects with both a “force” contact and a “sense” contact. In one embodiment, the sense contact partially or completely laterally surrounds the force contact, so that it need not have its own resiliency. The sense contact has a forked end with prongs that extend to opposite sides of the force contact. Alternatively, the sense contact surrounds the force contact and slides laterally to match a lateral translation component of a lateral cross-section of the force contact during longitudinal compression of the force contact. Alternatively, the sense contact includes rods that have ends on opposite sides of the force contact, and extend parallel.
    Type: Grant
    Filed: April 21, 2010
    Date of Patent: October 15, 2013
    Assignee: Johnstech International Corporation
    Inventors: Joel N. Erdman, Jeffrey C. Sherry, Gary W. Michalko
  • Publication number: 20120282799
    Abstract: A floating or compliant plate test socket device and method is disclosed. Three primary components, a fixed frame 20 receives a floating or compliant plate 22, sit together atop a housing 24 which contains contact pins used for the electrical test of the DUT (device under test). In fixed plate 20 are bearings for reducing friction when the floating plate is driven downward by the DUT inserter. Embedded in sidewalls 40 are a plurality of vertical raceways 46 which receive bearings 48. The raceways are borings, which have gap in the boring, in the fixed plate sidewalls 40 with the boring center spaced from the sidewall sufficiently that part of the bore removes part of the sidewall but allows the ball bearings to partially protrude from the gap formed in the incomplete semicircular boarding without the bearings being able to freely escape.
    Type: Application
    Filed: April 26, 2012
    Publication date: November 8, 2012
    Applicant: Johnstech International Corporation
    Inventor: Joel N. Erdman
  • Publication number: 20120092034
    Abstract: Terminals (2, 502) of a device under test (DUT) are connected to corresponding contact pads or leads by a series of electrically conductive contacts. Each terminal testing connects with both a “force” contact and a “sense” contact. In one embodiment, the sense contact (770) partially or completely laterally surrounds the force contact (700). In order to increase the contact surface, the force contact, in a spring pin (700) configuration contacts the device under test terminal at that portion of the lead which is curved or angled, rather than orthogonal to the pin.
    Type: Application
    Filed: October 19, 2011
    Publication date: April 19, 2012
    Applicant: Johnstech International Corporation
    Inventors: Joel N. Erdman, Jeffrey C. Sherry, Gary W. Michalko
  • Publication number: 20100264935
    Abstract: Terminals of a device under test are connected to corresponding contact pads or leads by a series of electrically conductive contacts. Each terminal testing connects with both a “force” contact and a “sense” contact. In one embodiment, the sense contact partially or completely laterally surrounds the force contact, so that it need not have its own resiliency. The sense contact has a forked end with prongs that extend to opposite sides of the force contact. Alternatively, the sense contact surrounds the force contact and slides laterally to match a lateral translation component of a lateral cross-section of the force contact during longitudinal compression of the force contact. Alternatively, the sense contact includes rods that have ends on opposite sides of the force contact, and extend parallel.
    Type: Application
    Filed: April 21, 2010
    Publication date: October 21, 2010
    Inventors: Joel N. Erdman, Jeffrey C. Sherry, Gary W. Michalko