Cast Padlock from Hanayama - Solution

A Cast Padlock like no other! This solution to a puzzle from Hanayama will have you falling apart.
Cast Padlock: www.puzzlemaster.ca/browse/me...
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The design is evocative of a sturdy padlock. Just pick it up and you’ll quickly gain an appreciation for the challenge that lies ahead - this puzzle will not open easily! The interior is comprised of two elliptical pieces, locked together tightly around the circular pieces and obstinately refusing to be released. But don’t give up! Repeatedly separate and then put them back together and prove you have what it takes to unlock this riddle.
Puzzle Master is a Canadian distributor of a large assortment of disentanglement puzzles, wood puzzles, cast puzzles, metal puzzles, wire puzzles, brain teasers, jigsaw puzzles, puzzle boxes, puzzle rings, trick puzzle locks, maze puzzles, puzzle games, boomerangs, chess sets, and other great toys, puzzles and games. The company started because of an interest the owner, Allan Stein, had in collecting wire puzzles. Allan collected these puzzles for a few years before he thought of making them himself. Once he found out that he was able to make the puzzles successfully he thought "Why don’t I try to sell some of the puzzles at craft shows and see if there are people who like them as much as I do". At the craft shows he found that not only did the people like the puzzles, they loved them. These craft shows were the first way that Puzzle Master marketed these puzzles.
After selling at the craft shows for a few years, Allan decided to try and sell at some of the malls in Saskatoon. He rented a temporary location two weeks prior to Christmas and was totally amazed how quickly the puzzles sold. He subsequently ran out of the puzzles in 7 days. It was at that point that he realized that he had a business that was going to be viable. To this day we still have many businesses who sell at temporary locations a few weeks prior to Christmas.
In the beginning Allan made traditional puzzles that had been invented hundreds and even thousands of years ago. Now Allan is taking those traditional designs and adding his own unique touch.
Now Puzzle Master is the number one seller of puzzles online in the world.
• Cast Padlock from Hana...

[@DomAZ]

Great puzzle and nice explanation.