MULTI-FUNCTION WRENCH Russian patent published in 2015 - IPC B25B13/46 

FIELD: construction.

SUBSTANCE: multi-function single-head wrench comprises handle, gear, two dog teeth and switch. Handle has head and two grooves. Gear has teeth and is installed in the head with possibility of rotation. The first dog tooth is movably mounted in the first groove for engaging with the gear. The second dog tooth is movably mounted in the second groove for engagement with the gear after the disengagement of the first dog tooth with the gear. The switch provides displacement of the second dog tooth between the first mode, at which the second dog tooth is engaged with the gear, and the second mode, at which the engagement of the second dog tooth with the gear is prevented. The first groove is displaced in relation to the second groove to an angle calculated by formula: 360°×(M+1/2)÷N, where N - integral value, representing the number of teeth, and M - any integral value.

EFFECT: absence of wrench defect during its service.

10 cl, 8 dwg