초록 ▼

A handy safety knife comprises a generally flat holder having a chamber and an opening both defined therein, an elongated blade member, a manipulatable member carried by the holder for movement between projected and retracted position and operatively coupled to the blade member, a spring element for

A handy safety knife comprises a generally flat holder having a chamber and an opening both defined therein, an elongated blade member, a manipulatable member carried by the holder for movement between projected and retracted position and operatively coupled to the blade member, a spring element for biasing the manipulatable member to the retracted position to hold the blade member in position to be concealed within the chamber, and, if desired, a wedge member for retaining the manipulatable member in the projected position once it has been moved thereto.

대표청구항 ▼

A compact safety knife which comprises: a generally flat holder having a chamber therein and an opening therein opening out of said chamber; an elongated blade member in said chamber; said holder having a guide slot defined therein; a manipulatable member mounted on said holder and having a slider p

A compact safety knife which comprises: a generally flat holder having a chamber therein and an opening therein opening out of said chamber; an elongated blade member in said chamber; said holder having a guide slot defined therein; a manipulatable member mounted on said holder and having a slider positioned externally of the holder and a stem having one end integrally formed with said slider and extending through said guide slot, and said stem having a slot therein, said manipulatable member being movable between projected and retracted positions for, when said manipulatable member is moved to the projected position, moving said blade member through said opening a distance such that only one end portion of the blade member projects out of the chamber through the opening, and when said manipulatable member is moved to the retracted position, said blade member is moved so that it is completely within said chamber; said guide slot extending in a direction parallel to the direction of movement of the blade member; means in said holder for guiding the blade member for straight movement in the longitudinal direction thereof during the movement of the manipulatable member between the projected and retracted positions; and a wire spring in said chamber having one end engaged with said holder, the other end of said wire spring loosely extending through said slot in said stem and biasing said manipulatable member to the retracted position and when the manipulatable member is in the projected position tending to move the blade member in a direction so that the cutting edge thereof is spaced from the edge of said opening in said holder.