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Locking blade pocket-knife

  • US 4,837,932 A
  • Filed: 07/28/1986
  • Issued: 06/13/1989
  • Est. Priority Date: 08/06/1985
  • Status: Expired due to Term
First Claim
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1. A locking blade pocket-knife, comprisinga handle;

  • a knife blade received within said handle, said knife blade being pivotally mounted at an end of said handle for movement between an extended and a retracted position, said knife blade including a tang portion and cam means,a beam spring pivotally mounted within said handle for limited rocking movement, said beam spring including an aperture, a projection partially enclosing said aperture, and a cam guide adjacent said projection, said cam means and cam guide cooperating to control pivotal movement of said knife blade, said cam means traveling along cam guide and causing said beam spring to rock when said knife blade is pivoted,a pawl key movable between a locking position in said aperture and an unlocked position outside of said aperture,biasing means urging said pawl key into locking position when said knife is in its extended position, said projection engaging said pawl key to prevent rocking movement of said beam spring and travel of said cam means along said cam guide and thereby to prevent retraction of said knife blade when said pawl key is in its locking position, anda pawl mounted in said handle for manual sliding movement, said pawl being connected to said pawl key whereby movement of said pawl disengages said pawl key from said projection.

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