Including Latch To Connect Pivoted Jaws Patents (Class 81/90.6)
At least three jaws enclose work (Class 81/90.7)
  • Wrench
    Patent number: 8925425
    Abstract: A wrench fitted with a handle and a ring that can be swiveled open to grip a screw head or a nut with a positive fit, whereby the ring has a first segment that is arranged on the handle, and a free second segment as well as a connecting member that joins the second segment to the first segment in an articulated manner. A lever is provided on the connecting member so that the ring that can be swiveled open.
    Type: Grant
    Filed: January 17, 2013
    Date of Patent: January 6, 2015
    Assignee: Hilti Aktiengesellschaft
    Inventor: Thomas Merhar
  • Wrench
    Patent number: 6978701
    Abstract: A wrench has a head portion (10) adapted to engage and apply torque to a workpiece, including a ring member (14) which surrounds the workpiece and has a fixed end (16) and a free end (18) such that, when the ring engages a workpiece and a torque is applied in a predetermined direction (48), the ring closes around the workpiece, increasing the grip between the wrench and the workpiece even if the workpiece is substantially worn, damaged or undersized.
    Type: Grant
    Filed: March 29, 2000
    Date of Patent: December 27, 2005
    Assignee: Smart Tools Limited
    Inventor: Nigel Buchanan