Patents by Inventor Abdolreza Cheshmehdoost

Abdolreza Cheshmehdoost 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).

  • Torque sensing apparatus and method
    Patent number: 6912922
    Abstract: A torque sensor comprising a shaft of magnetostrictive material; a pair of magnets having oppositely sensed poles positioned circumferentially around the shaft so as to induce a localized magnetic field in the shaft between the poles. A torque applied to the shaft is sensed by a flux detector positioned circumferentially between the magnet poles so as to detect a component of the localized magnetic field which escapes from the shaft as a result of the torque. With this design, there is no need to permanently magnetize the shaft or a collar attached to the shaft, as in the prior art. The prior art manufacturing step of permanently magnetizing the collar or its shaft is also thus eliminated, greatly simplifying the manufacturing.
    Type: Grant
    Filed: November 2, 2001
    Date of Patent: July 5, 2005
    Assignee: First Inertia Switch Limited
    Inventors: Abdolreza Cheshmehdoost, Brian Johnson
  • Torque sensing apparatus and method
    Publication number: 20020112549
    Abstract: A torque sensor comprising a shaft of magnetostrictive material; a pair of magnets having oppositely sensed poles positioned circumferentially around the shaft so as to induce a localized magnetic field in the shaft between the poles. A torque applied to the shaft is sensed by a flux detector positioned circumferentially between the magnet poles so as to detect a component of the localized magnetic field which escapes from the shaft as a result of the torque. With this design, there is no need to permanently magnetize the shaft or a collar attached to the shaft, as in the prior art. The prior art manufacturing step of permanently magnetizing the collar or its shaft is also thus eliminated, greatly simplifying the manufacturing.
    Type: Application
    Filed: November 2, 2001
    Publication date: August 22, 2002
    Inventors: Abdolreza Cheshmehdoost, Brian Johnson
  • Torque sensing apparatus and method
    Publication number: 20020059839
    Abstract: A torque sensor comprising a shaft of magnetostrictive material; a pair of magnets having oppositely sensed poles positioned circumferentially around the shaft so as to induce a localized magnetic field in the shaft between the poles. A torque applied to the shaft is sensed by a flux detector positioned circumferentially between the magnet poles so as to detect a component of the localized magnetic field which escapes from the shaft as a result of the torque. With this design, there is no need to permanently magnetize the shaft or a collar attached to the shaft, as in the prior art. The prior art manufacturing step of permanently magnetizing the collar or its shaft is also thus eliminated, greatly simplifying the manufacturing.
    Type: Application
    Filed: November 30, 2000
    Publication date: May 23, 2002
    Inventors: Abdolreza Cheshmehdoost, Brian Johnson