Removable floor sink drain lock
Improved floor sink drain screen locks having expandable means for sealingly engaging the walls of a floor sink drain, yet being readily collapsible for quick and easy removal when desired.
1. A floor sink drain screen lock comprising: an upper disc formed with a central opening surrounded by a plurality of additional openings, an expandable split ring, a resilient ring encircling said split ring, a lower disc formed with a central internally threaded opening surrounded by a plurality of additional openings, and a bolt extending through the central opening of said upper disc and threadedly engaging the central opening of said lower disc.
2. The drain screen lock of claim 1 wherein said upper disc is formed with a tapered lower side.
3. The drain screen look of claim 1 wherein said lower disc is formed with a tapered upper surface.
4. The drain screen lock of claim 1 wherein said resilient ring is square in cross section.
5. The drain screen lock of claim 1 wherein said discs are formed of metal.
6. The drain screen lock of claim 1 wherein said split ring is formed of flexible material.
7. The drain screen lock of claim 1 wherein said bolt is tamperproof.