Patent ID: 7171876

Claim:
A wrench combination comprising: a handle comprising an ear formed at an end, with the ear of the handle comprising an aperture defined therein and an annular groove defined therein around the aperture; a wrench comprising an annular head, an ear extending from the annular head and an annular gear put rotationally in the annular head, with the ear of the wrench comprising an aperture defined therein and an annular groove defined therein around the aperture; a first washer put in the annular groove defined in the ear of the handle, the first washer comprising an aperture, first and second pairs of contact locations at opposite positions of the aperture on a first side and a central contact location intermediate each pair of contact locations and two lateral contact locations on an opposite second side, with the central contact locations located intermediate the two lateral contact locations; a second washer put in the annular groove defined in the ear of the wrench, the second washer comprising an aperture, first and second pairs of contact locations at opposite positions of the aperture on a first side and a central contact location intermediate each pair of contact locations and two lateral contact locations on an opposite second side, with the central contact locations located intermediate the two lateral contact locations; a joint comprising a first pair of ears for sandwiching the ear of the handle and a second pair of ears for sandwiching the ear of the wrench; a first bolt driven in the first pair of ears of the joint, the aperture of the first washer and the ear of the handle; and a second bolt driven in the second pair of ears of the joint, the aperture of the second washer and the ear of the wrench.