Patent: 95935 from 09.06.2009 It is valid to 2019 Cellular phone with USB port

The Utility model belongs to the family of the fastening mechanisms, to the carving joints, to be precise, and it's purpose is fastening anything to thin, hollow walls without having an access to the back side of the wall.

There is plenty of anchoring linking constructions made for fastening some objects to thick firm walls. Its disadvantage is in inability of fastening anything to a thin hollow wall, to a metal plate, for instance.

The technical purpose of the prospective Utility model is to exclude mentioned above drawbacks by splitting the fastening bolt into several parts - a tack, left and right splints, to make it possible to place them separately on the back side of the wall through an opening in it.

The aim can be achieved by doing the following: there are two openings in the construction of the tack: the first one goes lenghtwise the center of the tack, the second one is across the end of the tack for locating the splints in it. This opening consists of two diametrically opposite to each other openings for the splints. The splints have threads and capronic lines attached to them on the bottom which make the splints get fastened to the grooves/openings on the end of the bolt. They serve as the basis turning it into a threading connection - the bolt. The threads go through the side crosscut openings on the end of the bolt, where the splints are installed, and come out through the exterior front of the lenghtwise opening in the center of the bolt.

The Utility model works the way described below:
To locate the UM into the opening in the wall, the splints are taken out of their grooves and are pushed by the tack to the other side of the hollow wall. Along with that the ends of the threads remain outside the tack.
After the interior end of the tack turns out on the other side of the hollow wall together with the left and right splints, it's necessary to draw the threads, coming out of the exterior front of the tack till the splints fully penetrate into their own grooves/openings.
For better understanding, it's necessary to mark, with another colour, the lenght of that part of the thread which upon full penetration into the splints' grooves will be reaching the boarder of the exterior front of the tack. When the thread of another colour is seen, it will be obvious that the splints are completely inserted into their grooves.

During placing the splints on the back side of the wall in order to make the threads stay inside the openings, it's important to fix the rings on the ends. The rings should be good enough to put fingers in them to manipulate, while fastening the splints into the grooves and holding, at the same time, the tack with the fingers of another hand.
After the splints are installed into their openings, the ends of the threads go through a screw-nut which tightens up and attaches any object to the wall.
To avoid falling of the splints out of the openings in case the screw-nut gets loose, for instance, after any vibrations, the end of the tack is winded with the thread and gets plugged by the decorative stopper (cap). For more confidence, in addition to that, the winded thread can be covered with the glue but in this case the Utility model will be disposable and can not be fully extracted with all its splints.

To help keep the UM from turning over upon tightening it up with the screw-nut, the exterior bearing ends of the splints should be made four-sided with prominent spots on the surface of each side to allow them go deep into the back surface of the hollow wall.

The usage of the prospective Utility model will allow to attach any object to a hollow thin wall, the back side of which cannot be reached with the screw-nut tightening instruments (the spanner). The diameter of the opening should be slightly bigger than the exterior diameter of the tack of the UM.

The Formula of the Utility model

The bolt with a spiral carving differing from others in not having the head for support, its function is performed by two bearing (supportive) splints which are tightened up into a cross opening/groove on the end of the tack with the help of a thin and flexible thread, capronic lines or a metal string stretched into a lengthwise opening connected to the crosscut openings of the bearing splints.

Summary

The Utility model belongs to the family of the carving fastening mechanisms, to the bolts with a spiral carving, to be precise, and it's purpose is fastening anything to thin, hollow walls without an access of the screw-nut tightening instruments (a spanner) to the back side of the wall.

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