Wild Birds Unlimited APS (Advanced Pole System)
http://shop.wbu.com/c/bird-feeder-parts-accessories
I've had one in my backyard for years, and if it's put up right (like vertical,
and NOT leaning over), and about 10 feet away from anything that could be
used as a jumping point for a squirrel, the squirrels can't make it up to the
feeder. You can buy an entire "system", or just the pieces that you need. The
poles are locked together by spring backed "pins" that go into holes on the
other piece. Don't have any raccoons around, so I don't know if it's raccoon proof,
but I do believe that they make different diameter "bells" that go on the pole to
stop different animals.
Andy