Perfected passing key (Machine-translation by Google Translate, not legally binding)

摘要

Improved pass-through, characterized essentially because it is constituted by a straight one-piece tubular conduit, provided with external threads at its ends and composed of two sectors, one longer and one shorter, both in axial extension, being the longest of greater diameter that the short, counting the tubular conduit itself with a solidary neck in a situation perpendicular to the tubular body, arranged precisely at the point of confluence of the longest and shortest sectors, whose neck determines a vertical chamber communicated by its bottom with the minor sector, being lodged in said chamber, by introduction from top to bottom, the rod with O-rings and diametrically perforated ball-shaped end, which constitutes the device for opening or closing the circulating liquid vein inside the duct, presenting internally the major sector a perforated walled that limits the chamber of the stem and reduces the passage of this sector to the next, on whose flange rests an elastic sealing washer, adapted by its conical face on the spherical head, receiving the latter by its opposite zone the thrust of a second elastic washer, of the same configuration, which remains in position work through its retention by means of a perforated nut that threads on the step established inside the sector of smaller diameter, arranging the mouth of the vertical neck of a radial indentation determining a stop for the position of opening or closing of the upper handle which actuates the stem, provided for the purpose of a radial projection in its closed base, and of the corresponding polygonal fit and hole for mounting the fixing screw of the handle on the stem. (Machine-translation by Google Translate, not legally binding)