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 Post subject: Analysis of V-7 mech.
PostPosted: Mon Dec 02, 2013 3:41 pm 
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Joined: Tue Nov 26, 2013 4:57 pm
Location: Green Bay, WI
I recently purchased a V-7 and decided to show my evaluation of differences between the mechanism V-Cubes used compared to the one shown in the patent. Personally, I think the implemented mech. is better.


Attachments:
File comment: The patent
v-cube 7 patent.png
v-cube 7 patent.png [ 28.54 KiB | Viewed 513 times ]
File comment: The product
v-cube 7.png
v-cube 7.png [ 60.94 KiB | Viewed 513 times ]

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 Post subject: Re: Analysis of V-7 mech.
PostPosted: Mon Dec 02, 2013 4:52 pm 
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Congrats on your first post! Over 1100 of our members haven't gotten that far yet. Anyways, I had never thought about the difference between the patent and the product. I think that design might not have been stable enough, so the company had to delay the release date to redesign the puzzle. That might answer some questions. Anyways, the implemented mechanism is definitely better than the patented mechanism. I guess V-Cubes company was legitimately interested in the highest quality product even before the release date, so they changed the pieces.

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 Post subject: Re: Analysis of V-7 mech.
PostPosted: Mon Dec 02, 2013 5:06 pm 
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They should have done that with the V-6 :x

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 Post subject: Re: Analysis of V-7 mech.
PostPosted: Mon Dec 02, 2013 5:20 pm 
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What about the product (vs patent) makes it better? I can't tell from just looking at the designs which will perform better.

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 Post subject: Re: Analysis of V-7 mech.
PostPosted: Mon Dec 02, 2013 6:00 pm 
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Some KO companies have produced them according to the patents, (Ex. 4x4) and these are inferior to V-Cubes products.

The use of less spherical shells helps the mechanism to be shallower, and the large spherical segments at the base of the corners and edges can stabilize the puzzle, much like a ball core does.
Attachment:
File comment: the virtual ball core
7x7x7open.jpg
7x7x7open.jpg [ 727.83 KiB | Viewed 432 times ]

7x7 pieces forming ball-like core
Attachment:
File comment: the ball core
ball core cube.jpg
ball core cube.jpg [ 43.9 KiB | Viewed 432 times ]

3x3 with a stabilizing ball core

One more V-Cube patent improvement
Attachment:
File comment: This shows a cylindrical inner surface, but the V-2 has a spherical inner surface, and an excellent bandaging method.
vcube2.gif
vcube2.gif [ 42.38 KiB | Viewed 432 times ]

These changes to the 2x2 prevent it from popping as much, since my V-2 still works with 2 opposite screws removed. (try it for yourself) This is because the other 4 surrounding centers have to move outward as well to pull off one layer of the cube.

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 Post subject: Re: Analysis of V-7 mech.
PostPosted: Tue Dec 03, 2013 12:36 am 
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Those who have been around a bit or read back in the forum history (always recommended, if you can find the time) will remember it was many years after the first news and prototypes before these came to market. There was great distress over this (by some) at the time but I think we can look back and agree getting to the right result was worth the time.

It should also be noted that there may have been some manufacturing considerations that drove changes to the abstract patent description. Taking a design to production can often lead to changes due to the nature of the injection molding process, the easiest example being that many pieces are formed of two injected parts (corners, many edge pieces).

Dave

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