We have some crushed limestone gravel walkways and a patio around our home. They are just a base of #57 which ranges in size from 1/2" - 1". Over that base is a couple of inches of #8 limestone which ranges from 1/8" to 3/8". Over time the larger can work it way up, or the smaller works its way down, either way some of the larger ends up on top. My wife does not like that look. Since she puts up with me. I needed a way to clean the big gravel off the walkways. The tines on a standard garden or road rake are spaced too wide to be of any help. I made a new rake to separate the large from the small gravel.
The handle is from a concrete grooving tool. For the rake I just used materials from my collection of left overs. I do not have any SCRAP material, all the stuff I have is left overs or collected from the junk piles of other people or businesses for the specific purpose of "making something someday". Just FYI, that is how I explain the collection of stuff I keep that others think is junk!!! So in addition to getting the gravel cleaned up, I managed to score points because I was using stuff from that "ugly pile" for her!!!!
Click to enlarge images
Mixed gravel sizes vs Separated Gravel
Rake tines and Gravel and Handle Attachment