Cutlery – Cutting tools – With guard and/or guide
Patent
1985-10-21
1987-03-17
Silverberg, Fred
Cutlery
Cutting tools
With guard and/or guide
30294, B26B 2900
Patent
active
046496475
ABSTRACT:
A hand-operated cutting tool for cutting walling materials such as paneling and drywall. The tool has a base with a smooth, flat bottom, similar to a planing tool. Its handle is curved, attaching at at least one end of the base, and extends over the base. A cutting blade is centrally located on the base, and held in place by a blade clamp. The blade clamp is pivotably attached to the base such that the tip of the blade extends through an opening formed for that purpose in the bottom of the base, and the tip is extended and retracted by the pivoting motion of the clamp. The clamp also has attached thereto a lever arm to facilitate the pivoting. The lever arm is biased against an upstanding member which is manufactured such that the lever arm, and thus the blade tip, can assume different positions. The upstanding member has a continuous groove formed therein which winds about the member from top to bottom such that it appears as several grooves which they may correspond to several positions of the lever arm. Additionally, the upstanding member is rotatable so that it can be turned less than a full turn if desired, causing the lever arm to move less than a full step. The lever arm is extended in such a manner that moving the lever arm a full step between appearances of the groove of the upstanding member is possible, effecting a full step change in the cutting depth of the blade.
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patent: 4443942 (1984-04-01), Demeter
Folkerts Michael D.
Kees Nicholas A.
Silverberg Fred
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