Patent ID: 8696014
Filing Date: 2014-04-15
Classification: B62B

Abstract:
1. A push cart comprising: a movable cart frame; a load-carrying plate installed on said cart frame; an expansion unit including two expansion plates that are detachably coupled to two opposite sides of said load-carrying plate respectively; and a coupling mechanism including a plurality of coupling units for detachably coupling said expansion plates to said opposite sides of said load-carrying plate, each of said coupling units including a female component disposed in one of said load-carrying plate and said expansion plate and a male component disposed on the other one of said load-carrying plate and said expansion plate for mating engagement with said female component; wherein said female component is an engaging groove cooperatively defined by a surrounding wall and a bottom wall said engaging groove having an opening, a first recess region extending from said opening, and two second recess regions extending from opposite lateral sides of said first recess region; and wherein said mail component is an engaging block having a first protrusion portion detachably received in said first recess region and said opening and a second protrusion portion intersecting said first protrusion portion and detachably received in said second recess regions.