Fabricate spade anchor

[Mr B]

I’m sure in practice there would be few legal actions brought against someone making an item purely for personal use. But the law (and all the legal beagles I could find online) makes it clear that it is not legal.[/QUOTE]

If the dimensions are different, There is no copy right or Patent infringement even if it does looks the same,

Been there, Done that, I was very dissapointed to find that out,
But it did save me a lot of money knowing it,

[boatpoker]

Originally Posted by Mr B

The shank is Bissaloy 350, Old left over excavator jaw bits,
It wont bend no matter how much stress is put on it,
I made it out of scrap bits of steel I had laying about my yard,
The point is Stainless Steel, Ground to a point,
Its about 75 LB, with the point weighing at 35 Lb,
The hoop is .26 carbon steel,
The base plates are 350 Carbon steel,
Welded with S6 Mig wire,

That looks like a recipe for galvanic corrosion.

[Mr B]

Originally Posted by boatpoker

That looks like a recipe for galvanic corrosion.

Its been hot dipped Galvanised,

[boatpoker]

Originally Posted by Mr B

Its been hot dipped Galvanised,

Less and less effective with every scratch.

[Mike OReilly]

Originally Posted by Mr B

...If the dimensions are different, There is no copy right or Patent infringement even if it does looks the same, ...

Yes, as long as it is sufficiently different (this is how lawyers make lots of money … by fighting over how different something must be). This is why I suggested to the OP to make an anchor inspired by Spade, or even better, one inspired by all new-gen anchors.

Like I said, I’m all for DIY solutions. But as someone who has made his living off his own IP (copyright), and as someone who has become fairly well versed in IP law in general, I am perhaps overly-sensitive to people suggesting they can just copy someone else’s work.

So, Goodonya

[billknny]

Originally Posted by onthewateralot

Ok....heard lots of good reviews about new spade anchors, problem is they are not cheap. I own a fabrication shop and really don't think it would take too long for one of my welders to fabricate one for my boat. I am an engineer also so know where max stresses are etc. Anybody do this? Any plans available?

The only anchor it makes sense to knockoff "at home" is the Bugel. Fabrication is simple and easy.

With other anchors the design is much more complex than it looks with lots of trial and error going into success. Factors like tip pressure and weight are not trivial.

[thinwater]

Originally Posted by Mike OReilly

Yes, as long as it is sufficiently different (this is how lawyers make lots of money … by fighting over how different something must be). This is why I suggested to the OP to make an anchor inspired by Spade, or even better, one inspired by all new-gen anchors.

Like I said, I’m all for DIY solutions. But as someone who has made his living off his own IP (copyright), and as someone who has become fairly well versed in IP law in general, I am perhaps overly-sensitive to people suggesting they can just copy someone else’s work.

So, Goodonya

Two patents and countless copyrights later, I'm with Mike. If you feel like you need to copy either the idea or the details, then the idea must have intrinsic value. Coming up with ideas is hard work, just like any other work.

[foggysail]

Originally Posted by Mike OReilly

Sounds like a copyright/patent violation to me.

Only if he makes and sells them. No sell, no violation

[foggysail]

Originally Posted by Mr B

Same here, Engineer, Blacksmith, Boilermaker DLI welder,
Own my own company,
I just made a copy of the three new generation anchors,
Took the best ideas of all three that I liked and made one up,
The shank is Bissaloy 350, Old left over excavator jaw bits,
It wont bend no matter how much stress is put on it,
I made it out of scrap bits of steel I had laying about my yard,
The point is Stainless Steel, Ground to a point,
Its about 75 LB, with the point weighing at 35 Lb,
The hoop is .26 carbon steel,
The base plates are 350 Carbon steel,
Welded with S6 Mig wire,
The chain cant get entangled no matter which way its rolled over,

One problem I did have was getting the point to weigh more,
I widened the hoop up about an inch, So the point went from 10 lb to 35 Lb,
The more you can get on the point, the better it bites in,
I had to make up a new bow roller to fit it on, The original was too small for it,
Have a look at Panope's Video's on anchors, They are very informative,

Cheers, Brian,

EXCELLENT!!!

[Paul L]

Originally Posted by Mr B

.......
If the dimensions are different, There is no copy right or Patent infringement even if it does looks

This is just not true. First thing most patents don't include dimensions. If there was a patent for a steam engine do you think building it at 3/4 scale gets you around the patent? It doesnt.

[Mike OReilly]

Originally Posted by foggysail

Only if he makes and sells them. No sell, no violation

Read the law (and past posts). Simply not true.

In practice I bet few cases are brought against purely personal uses. But that doesn't make it legal, or even right.

[Paul L]

Originally Posted by Mike OReilly

Read the law (and past posts). Simply not true.

In practice I bet few cases are brought against purely personal uses. But that doesn't make it legal, or even right.

Copyright has fair use exceptions. Patents don't.
They are very different animals and offer very different types of protection.

[foggysail]

Originally Posted by Mike OReilly

Read the law (and past posts). Simply not true.

In practice I bet few cases are brought against purely personal uses. But that doesn't make it legal, or even right.

From Forbes:

https://www.forbes.com/sites/toddhix.../#750688f33ef3

A patent is a sword, not a shield. It gives you the right to attack a competitor who makes commercial use of ("infringes") your patented technology. Contrary to common belief, it does not give you the right to practice your technology free of interference.

[Mike OReilly]

Originally Posted by Paul L

Copyright has fair use exceptions. Patents don't.

They are very different animals and offer very different types of protection.

Correct. I didn't suggest they were...?

There are some exceptions, or exemptions in US patent law as well. Whether the op's plans would fall under one is unclear to me. The point I'm making (or countering) is this common belief that it's ok to take someone's IP as long as you't don't sell it. It's ok under specific cases, as spelled out in the laws exceptions or exemptions.

Originally Posted by foggysail

From Forbes:



https://www.forbes.com/sites/toddhix.../#750688f33ef3



A patent is a sword, not a shield. It gives you the right to attack a competitor who makes commercial use of ("infringes") your patented technology. Contrary to common belief, it does not give you the right to practice your technology free of interference.

Read the law...

[Paul L]

Originally Posted by Mike OReilly

Correct. I didn't suggest they were...?

...

Yep, I was agreeing with you.

Anyway the IP discussion is probably getting a ways OT.