Patent ID: 7828349

Claim:
A resilient device for a door knob or a door handle, comprising: a first outer circular plate having a first center opening, a plurality of locking holes, and pairs of diametrically opposing notches along an outer edge of said first outer circular plate, and two opposite flanges extended perpendicularly and inwardly along a circumference of said first center opening; a second outer circular plate having a second center opening, a plurality of locking holes, and pairs of diametrically opposing notches along an outer edge of said second outer circular plate, and two opposite flanges extended perpendicularly and inwardly along a circumference of said second center opening; two circular intermediate plates mounted between said first and second outer circular plates, each of said intermediate plates having a center opening which is larger than said first and second center openings in diameter thereby forming a space between said intermediate plates and said first and second outer circular plates, a plurality of locking holes aligned with said locking holes of said first and second outer circular plates, pairs of diametrically opposing notches along a circumference of said intermediate plates and aligned with said notches of said first and second outer circular plates, and a first radial slot at a circumference of said center opening of said intermediate plates; said first and second outer circular plates and said intermediate plate being fastened together by engaging pins with said locking holes; a rotational seat rotatably housed in said space, said rotational seat having a flat piece surrounded by a wall and two diametrically opposing blocks positioned along an outer surface of said wall, said flat piece having a center opening having a saw-toothed circumference and being smaller than said first and second center openings of said first and second outer circular plates in diameter, said blocks having a distance from a top rim and a bottom rim of said wall, one of said blocks having a second radial slot on a top surface thereof; and a spiral spring positioned in a gap between said rotation seat and said intermediate plates, said spiral spring having an inwardly bended inner end and an outwardly bended outer end which are embedded in said first slot of said intermediate plates and said second slot of said rotational seat; wherein an axle of said door knob or said door handle is extended inside and locked to said center opening of said rotational seat; when said door knob or said door handle is turned, said rotational seat is turned as well to tighten said spiral spring; and, when said door knob or said door handle is released, said spiral spring expands to restore said door knob or said door handle back to an original, un-turned state.