Foldable push dagger

A knife comprising

• an elongated, generally planar, knife blade having first and second, oppositely disposed longitudinal ends and at least one sharpened knife edge of a continuous curvature extending along a substantial portion of the length of said blade and forming a sharpened knife point at said first longitudinal end of said blade,
• an elongated knife handle having first and second oppositely disposed longitudinal ends and
• means for interconnecting said blade and said handle along the length of said handle,
• said blade having a fully opened position and a fully closed position and being movable relative to said handle,
• said blade and said handle being physically disposed in the form of a "T" configuration when said blade is in its fully open position and being physically disposed in the form of an "I" configuration when said blade is in its fully closed position, said blade in its fully opened position comprising the vertically extending stem portion of said "T" configuration and said handle comprising the horizontally extending top or cross portion of said "T" configuration,
• said interconnecting means comprises manually engageable means for moving said blade and for releasably securing said blade in its fully opened position, said manually engaging means being fixedly secured to said blade at said second longitudinal end of said blade and extending movably outwardly from the plane of said blade to facilitate the manual engagement thereof.

A knife comprising

• an elongated, movable, sharpened knife blade,
• elongated means for receipt therein of said blade when said blade is in its fully closed position, said elongated means comprising an elongated knife handle, and
• interconnecting means for physically interconnecting said blade and said handle and for permitting relative movement between said blade and said handle,
• said blade having a longitudinal axis disposed parallel to the longitudinal axis of said handle when said blade is in its fully closed position and disposed perpendicularly to said longitudinal axis of said handle when said blade is in its fully opened position,
• said interconnecting means comprising manually engageable means for moving said blade and for releasably securing said blade in its fully opened position,
• said manually engageable means including a movable locking member having an outer peripheral configuration and a spring for spring biasing said movable locking member,
• said handle including interlocking means for releasably receiving and securely retaining said locking member in engagement therewith when said blade is in its fully opened position, said interlocking means having an inner peripheral configuration complementarily shaped to said outer peripheral configuration of said locking member to prevent substantial relative movement between said blade and said handle when said blade is in its fully opened position,
• said outer peripheral configuration and said inner peripheral configuration being both rectangular configurations,
• said interlocking means comprising a recess formed in said handle,
• said movable locking member comprising a movable, cantilever spring locking member,
• said manually engageable means further including means for fixedly securing one longitudinal end of said movable, cantilever spring locking member to an end portion of said blade and wherein the other, opposite, longitudinal end of said movable, cantilever spring locking member is both movable relative to said end portion of said blade and movable into and outside of said recess formed in said handle.

A knife comprising

• an elongated knife blade,
• an elongate knife handle and
• means for interconnecting said blade and said handle,
• said blade having a fully opened position and a fully closed position and being movable relative to said handle,
• said blade and said handle being physically disposed in the form of a "T" configuration when said blade is in its fully open position and being physically disposed in the form of an "I" configuration when said blade is in its fully closed position,
• said interconnecting means comprising manually engageable means for moving said blade and for releasably securing said blade in its fully opened position,
• said manually engageable means including a movable locking member having an outer peripheral configuration and a spring for spring biasing said movable locking member,
• said handle including interlocking means for releasably receiving and securely retaining said locking member in engagement therewith when said blade is in its fully opened position, said interlocking means having an inner peripheral configuration complementarily shaped to said outer peripheral configuration of said locking member to thereby prevent substantial relative movement between said blade and said handle when said blade is in its fully opened position,
• said interlocking means comprising a recess formed in said handle,
• said movable locking member comprising a movable, cantilever spring locking member,
• said manually engageable means further including means for fixedly securing one longitudinal end of said movable, cantilever spring locking member to an end portion of said blade and wherein the other, opposite, longitudinal end of said movable, cantilever spring locking member is both movable relative to said end portion of said blade and movable within and outside of said recess formed in said handle.