Patent ID: 8876125

Claim:
A frame apparatus for a lightweight rollator having: a front frame having: a base having: two free rear ends; a middle; two connecting tabs formed on and protruding upwardly from the middle of the base at an interval and being parallel to each other; two locking elements retractably and respectively mounted on the connecting tabs; a mounting frame mounted on the free rear ends of the front frame and having two mounting holes formed through the mounting frame between the free rear ends of the base; and a handle frame rotatably connected to the base and having: a lower end; a front wheel rotatably connected to the lower end of the handle frame; and two connecting arms being curved, formed on and protruding backwardly from the handle frame near the lower end of the handle frame and pivotally connected to the middle of the base between the connecting tabs, and each connecting arm having a locking board formed on and protruding forwardly from the connecting arm to lock with one of the locking elements; and a rear frame detachably connected to the front frame and having: a bottom mount detachably connected to the mounting frame of the front frame and having a front side; two sidewalls; a guiding rod formed on and protruding from the front side of the bottom mount and extending through one of the mounting holes of the mounting frame when the bottom mount is connected to the mounting frame; and an engaging shaft formed on and protruding from the front side of the bottom mount and extending through the other mounting hole of the mounting frame; two rear wheels rotatably and respectively connected to the sidewalls of the bottom mount; and at least one driving motor securely mounted on the bottom mount and connected to the rear wheels to drive the rear wheels to rotate relative to the bottom mount.