Lock Device and Method of Use

摘要

The present invention, and inventive system, describes a lock system that is designed to be attached to an existing cast iron loose grate and or manhole covers that sits in a cast iron or other material frame allowing the loose grate to be locked into the frame so it cannot be removed from the frame accidently or on purpose without the proper tool to unlock the security locking bolt. In some embodiments of the present invention, the present invention does not need a frame and interacts with the wall holding the cover directly. In at least one embodiment the present invention operates by an upper and lower section. The lower section may have multiple bars that operate independently of each other. These lower sections can rotate about a screw which is located in a hole drilled through a grate or manhole, such that the lower sections can rotate across the manhole cover and extrude past the radius of the manhole cover.

主权项

1. An improved locking system comprising:
A hollowed three dimensional top base with a hole in a top region, multiple holes in the side region adjacent to the top region, and a threaded lower region; A lower three dimensional base with a large orifice; An upper nut; A lower nut; Several small spheres of larger diameter than the multiple holes in the side region; At least one large sphere of larger diameter that the small spheres; A locking screw which can be inserted into the hole in the top region of said upper base; said locking screw mechanically engage with said large sphere such that when rotated said locking screw causes the large sphere to move relative to the locking screw and to force said small spheres to extrude from said base via said multiple holes; said threaded lower region is threaded with said upper nut; said threaded lower region is inserted in mechanical communication with said large orifice of said lower base with a region of said threaded lower region extruding through said lower base; said lower nut is threaded with said threaded lower region extruding through said lower base.