END KEY FOR PLUMBING WORKS Russian patent published in 2019 - IPC B25B13/06 B25B13/48 

FIELD: hand tools.

SUBSTANCE: invention relates to hand tools, for screwing and unscrewing nuts in hard-to-reach places, for example nuts for attachment of mixer with flexible hose to sink. End key for screwing and unscrewing attachment nuts for supplying flexible hoses to the mixer comprises a housing in the form of a hollow tube, on the upper end of which there is a head with an internal hexagon, having on the side surface a cutout to the entire height, at that said case has notch on side surface aligned with cutout on head side surface. Cutouts on head and body are wider than total diameter of two flexible hoses, and are made symmetrically relative to longitudinal plane of key case, wherein the head slot width is greater than the flexible hose diameter and less than the body cutout width, and the head cutout height is greater than the attachment nut height, wherein the head cutout lower part is made in the form of a semi-circle, the diameter of which is equal to the width of the cutout on the body, wherein below lower point of cutout on housing there is through hole, axis of which is located perpendicular to axis of symmetry of housing cutout and in plane parallel to plane of upper end face of head, at that head upper and lower ends are parallel and located perpendicular to key housing axis.

EFFECT: reduced time required for screwing and unscrewing the hexagonal nut for attachment of the mixer to the sink, higher convenience and safety of the twisting and unscrewing operations.

1 cl, 5 dwg