FOUR-WAY NUT WRENCH Russian patent published in 2009 - IPC B25B13/06 B60B29/00 

FIELD: engineering industry.

SUBSTANCE: four-way nut wrench includes prismatic bar with cross-section in a form of a polygon with wrench socket at one end and working tip at the other one. Also three circular grooves and enlarged element with wrench sockets at the ends. Enlarged element is performed with three identical pairs of partially inter-crossing holes with inter-perpendicular axes that cross lateral axis of enlarged element at right angle. First holes of each pair of partially inter-crossing holes are through with the same polygon form of cross-section as prismatic bar and with dimensions providing its sequential location in these holes with the possibility of longitudinal movement. One first hole is located in the middle of enlarged element, and the other two first holes are equally spaced in relating to the first one. The edge of the first hole side surface, crossed by the corresponding second hole in each pair of partially inter-crossing holes is located in longitudinal center plane of enlarged element that is perpendicular to axes of the above mentioned second holes. In each second hole there is self-reset button clamp.

EFFECT: use of invention provides the increase of performance reliability and maintainability of four-way nut wrench.

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