US Patent 10407931 Modular swimming pool cleaner

A modular pool cleaning robot is disclosed. The pool cleaning robot includes easily replaceable and/or interchangeable parts and allows for various end-user selectable configurations without the use of tools and without complex and time-consuming large-scale disassembly. Among these parts are a chassis and drive assembly. The drive assembly is removable securable to the chassis via a snap engagement effectuated by pressing the drive assembly against the chassis, without the use of any external fasteners or any tools. The drive assembly detaches from the chassis when a lateral force is exerted on the drive assembly.