Patent ID: 8128311

Claim:
A grass protection mat system comprising: at least one mat, each mat comprising: a body made of polygonal portions connected to each other, forming spaces for growing grass; pillars integrally protruded upward from the body; an outer frame connecting with the periphery of the body to maintain the shape of the mat; lug members integrally protruded from lower parts of the body and the outer frame; hooking means laterally protruded at the outer frame, for enabling connection of the mat, and an opening formed at the inner surface of the outer frame, for receiving hooking means of an another adjacent mat, wherein the opening of the mat includes a fastening hole formed through an extension plate integrally and laterally formed on a point of the outer frame and disposed inside of the outer frame, in a corresponding position of the hooking means of the another adjacent mat, wherein an opening of an adjacent mat includes a fastening hole formed through an extension plate integrally and laterally formed on a point of an outer frame of the adjacent mat, in a corresponding position of the hooking means of the mat, wherein the hooking means of the mat is of a slide-type mechanism including: bodies laterally protruded from a plurality of regions of the outer frame of the mat and extended downward, each having a cutout perpendicularly formed through a corresponding one of the bodies for resilient operation, and hooks integrally protruded outwardly from both sides of lower parts of the bodies, wherein some of the hooks of the mat are fixedly inserted through, and extend below, the fastening hole of the adjacent mat, and wherein upper surfaces of the some of the hooks are supported by, and in contact with, an underside of the extension plate of the adjacent mat, and wherein the opening of the mat further includes a guiding groove that is formed on the fastening hole of the opening of the mat and enables slide insertion of the hooking means of the another adjacent mat securely into the fastening hole of the opening of the mat, the guiding groove further enables the hook of the hooking means to be moved along to be fastened into the opening.