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US 5,147,093 AGranted
Puzzle bolt
OwnerRoger B. Tisdaleinventor
Life of this patent
Estimating the term…
Abstract
A puzzle is disclosed which includes an elongated left-hand threaded bolt carrying a split lock washer and having a nut at one end. The other end of the bolt is partially threaded into a second nut which has a short length of another bolt threaded at its end. The object of the puzzle is to figure out how to remove the lock washer from the bolt.
Claims2
An improved puzzle, comprising:
- a) an elongated left-hand threaded bolt having a first end and second end;
- b) a first nut fixedly mounted on said first end;
- c) a second left-hand threaded nut having a left-hand threaded passageway therethrough, said passageway having a first region and a second region;
- d) said first region being filled with a short left-hand threaded rod fixedly mounted therein and extending slightly outwardly from said first region whereby left-hand threaded side walls thereof are visible;
- e) said second region being threaded over said second end of said bolt with said second end tightened against said short rod;
- f) a split ring captured between said first nut and said second left-hand threaded nut, said split ring having a split defined by two opposed faces which are misaligned with respect to one another;
- and
- g) said first nut and said second left-hand threaded nut each having outer peripheral surfaces with grooves therein to give a mistaken impression that said split ring may be removed from said bolt by allowing at least one of said faces of said split ring to enter one of said grooves.
5 more elements
Dependencies are inferred from the claim text.