Patent ID: 7882768

Claim:
A set of manual wrenches for actuating cylindrical elements, the set comprising: a plurality of wrenches, each of the wrenches having, an actuating handle; a fixed jaw arranged on one end of the actuating handle; a moving jaw articulated and rotatably mounted about an axis on the one end of the handle; a spring fixed to the handle and actuating said moving jaw towards a closed position on the fixed jaw; a toothed section on the fixed jaw; the toothed section having teeth, each tooth thereof having a crest and the crests of the teeth determine an arc having a radius; a center of the arc of the toothed section is located at a distance from a center of the axis of rotation of the moving jaw, wherein each of the wrenches, of the set of wrenches, has a different radius for the arc and each of the wrenches of the set of wrenches has a different distance; and the radius of each of the wrenches is between 35 millimeters and 15 millimeters, and the distance is between 20 millimeters and 57 millimeters, wherein for the plurality of wrenches in the set of wrenches, the radius of one wrench in the set is larger than the radius of a next wrench in the set and the distance of the one wrench in the set is smaller than the distance of the next wrench in the set.