Importance

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Abstract

A hand tool comprises a body (2), a handle member (3) pivotally mounted thereon and an operating member (4) which is displaceable relative to the body between a starting position and a turning position against the action of a force. The handle member (3) comprises an elbow lever element (10) which has a pivot pin (14) resting against a support (15) arranged in the body (2) and which is displaceable along the support perpendicular to the pivot pin (14). The elbow lever element (10) has a first arm (10') which is pivotable about the pivot pin (14) towards and away from the body (2), and a second arm (10') which is adapted to engage the operating member (4) when the first arm (10') pivots in the direction of the body (2) and to move the operating member from the starting position to the turning position against the action of said force. The handle member (3) is arranged such that the elbow lever element (10), when the first arm (10') pivots in the direction of the body (2), on the one hand is pivoted about the pivot pin (14) and, on the other hand, is moved in the direction of the operating member (4) while the pivot pin rests against the support (15), whereby the moment arm (L1, L2) of the first and second arm (10', 10') perpendicular to the direction of displacement of the operating member (4) gets longer and shorter, respectively.

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First Claim