Lightweight luggage shell

Abstract

A luggage shell is formed of a top plate, a bottom plate, and two side plates, which are all provided with a number of pits for reducing the weight of the luggage shell. The pits are arranged at interval in rows. The top plate, the bottom plate and the side plates are further provided with a plurality of ribs which are located between two adjacent rows of the pits for reinforcing the structural strength of the luggage shell.

I claim:  
     
         1 . A luggage comprising a shell, a sleeve fitted over said shell, an expandable pull rod fastened with the shell, and a plurality of casters pivoted to the shell; wherein said shell is formed of: 
 a top plate provided with a number of pits, said pits being arranged equidistantly in rows for reducing the weight of said top plate, said top plate further provided with a plurality of ribs which are located between two adjacent rows of said pits and are intended to reinforce the structural strength of said top plate whereby said pits and said ribs are integrally made with said top plate;    a bottom plate provided with a number of pits, said pits being arranged equidistantly in rows for reducing the weight of said bottom plate, said bottom plate further provided with a plurality of ribs which are located between two adjacent rows of said pits for reinforcing the structural strength of said bottom plate, said pits and said ribs being made integrally with said bottom plate; and    two side plates fastened between said top plate and said bottom plate and provided with a number of pits which are arranged equidistantly in rows for reducing the weight of said side plates, said two side plates being further provided with a plurality of ribs whereby said ribs are located between two adjacent rows of said pits for reinforcing the structural strength of said side plates, said pits and said ribs being made integrally with said side plates.