Patent ID: 9562365
Date: 2017-02-07
CPC Classifications: E04F

Claim:
1. A device used for installing tiles, comprising: a knob-cam which is a rotatable top portion, said knob-cam being adapted for leveling tile surfaces: said knob-cam having a body which has a central opening therethrough, said central opening being in a key shape formed by a central circular portion with a first slot and a second slot, wherein said first slot and said second slot extend in opposite directions from said central circular portion, and said knob-cam having a first cam helically ascending about said central circular portion, said first cam having an upper surface radially extending from said central circular portion, said first cam having a lowermost edge adjacent said first slot: said knob-cam having a second cam helically ascending about said central circular portion, said second cam having an upper surface radially extending from said central circular portion, said second cam having a lowermost edge adjacent said second slot; said knob-cam including a portion adapted for manual gripping, and said knob-cam having a bottom seating guiding surface; said upper surface of said first cam having a succession of radially extending ascending portions which are scallop shaped, each of said ascending portions of said upper surface of said first cam having a leading edge, a valley portion, and a hill portion; said upper surface of said second cam having a succession of radially extending ascending portions which are scallop shaped, each of said ascending portions of said upper surface of said second cam having a leading edge, a valley portion, and a hill portion; a hook-base having a base and a hook, said hook having a tongue portion and a neck connecting said tongue portion to said base; said tongue portion having two engaging blades extending in opposite directions from said neck; said two engaging blades being adapted to engage each of said first and second cams said hook being adapted to pass through said opening in said knob-cam, said hook-base being adapted to space tiles; wherein said scallop shaped ascending portions of said upper surface of said first cam and said upper surface of said second cam are adapted to seat at a lowermost edge of said two engaging blades in said valley portions; whereby when said hook is inserted through said central opening, rotation of said knob-cam causes engagement of said first and second cams with said blades of said hook-base, to provide a clamping force between said knob-cam and said hook-base such that adjacent tiles disposed between said knob-cam and said hook-base are urged to be level and spaced.