Anti-skid plate for a stair

Abstract

An anti-skid plate is to be fixed on a corner of a step of a stair. The corner is formed with a generally L-shaped notch which has a generally horizontal notch portion and a generally vertical notch portion that form an angle of about 90° therebetween. The anti-skid plate includes a rectangular, generally horizontal plate portion for engaging fittingly the horizontal notch portion of the notch in the corner of the step of the stair, and has a plurality of upwardly extending integral upper ribs that are generally parallel to the vertical notch portion and that have round top ends, and a rectangular, generally vertical plate portion that has a top side formed integrally on an outer side of the horizontal plate portion and that is mounted to engage fittingly the vertical notch portion. A lower rib projects integrally and downwardly from the horizontal plate portion in a direction that is generally parallel to the vertical plate portion. The lower rib is to be embedded within the step, and has an enlarged lower end for preventing removal of the anti-skid plate from the step.

I claim:  
     
         1 . An anti-skid plate adapted to be fixed on a corner of a step of a stair, the corner being formed with a generally L-shaped notch which has a generally horizontal notch portion and a generally vertical notch portion that form an angle of about 90° therebetween, said anti-skid plate comprising: 
 a rectangular, generally horizontal plate portion adapted to engage fittingly the horizontal notch portion of the notch in the corner of the step of the stair, and having a plurality of upwardly extending integral upper ribs that are adapted to be disposed generally parallel to the vertical notch portion and that have round top ends;  
 a rectangular, generally vertical plate portion having a top side that is formed integrally on an outer side of said horizontal plate portion, said vertical plate portion being adapted to engage fittingly the vertical notch portion; and  
 a lower rib projecting integrally and downwardly from said horizontal plate portion in a direction that is generally parallel to said vertical plate portion, said lower rib being adapted to be embedded within the step, and having an enlarged lower end for preventing removal of said anti-skid plate from the step.  
 
     
     
         2 . The anti-skid plate as defined in  claim 1 , wherein said horizontal plate portion further has an elevating rib element which projects integrally and upwardly from the side thereof and which is parallel to said upper ribs, said elevating rib element having a width and a height which are respectively and slightly larger than those of said upper ribs.  
     
     
         3 . The anti-skid plate as defined in  claim 2 , wherein said elevating rib element has a round top end.