Wrenches having two driving stems pivotally connected with each other

  • US 6,688,196 B2
  • Filed: 04/06/2002
  • Issued: 02/10/2004
  • Est. Priority Date: 08/28/2000
  • Status: Expired due to Term
First Claim
Patent Images

1. A pivotal wrench comprising:

  • a first driving stem, comprising further;

    a main hexagonal stem;

    an enlarged female joint section at the proximal end of the first driving stem comprising;

    a conical transition section; and

    a cylindrical or square base section further comprising two fillets protruding from two opposite sides of the base section with a space in between wherein each fillet comprises a hole;

    a second driving stem, comprising further;

    a main hexagonal stem;

    an enlarged male joint section at the proximal end of the second driving stem comprising;

    a conical transition section; and

    a cylindrical or square base section further comprising a fillet extending out at the center of the base section wherein the fillet comprises a hole;

    an engaging means being threaded through the holes of the female joint section fillets of the first driving stem and the hole of the male joint section fillet of the second driving stem wherein the male joint fillet is engaged within the space between the two female joint fillets.

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