On 5/27/2017 12:44 PM, dpb wrote:
On 05/27/2017 12:40 PM, Leon wrote:
...

I think the big advantage Gass has is that he has a redundant system, it
works in two different ways.

How dat? I've never heard that before...

The Bosch triggers, and then the arbor/blade carriage assembly
immediately drops below the table surface, AND I believe the blade then
coasts down to a stop. completely below the table surface. No damage to
the blade.

The SS triggers the brake and it jams into the blade. That energy is
transferred to a trip lever and causes the arbor/blade carriage assembly
to drop below the surface immediately after. Blade damaged.

If for some reason there was interference, a small piece of cut off
material dropped into the saw and later restricts the path of the
arbor/blade such that it restricts the arbor/blade carriage assembly
from dropping I believe the Bosch will still cut you.

If there is interference similar to what I mentioned above but on the
SS, the arbor/blade also may not drop, but the SS still engages the
brake into the blade and stops the blade.

Could debris restrict the brake on the SS from engaging?
I don't see how. The brakes moving parts are self contained and no
debris can enter into the brake mechanism. The brake "shoe" has an air
gap of about 1/8" between itself and the teeth of the blade. The
spinning blade would keep this gap clear.


The SS arbor/blade carriage has to be reset on the SS, and probably the
Bosch, along with replacing the brake. After removing the blade and
brake you simply grab the arbor and lift the arbor/carriage until you
hear a click and it stays in the normal raised position.


Some saws with riving knives have a larger opening behind the knife that
can allow small pieces of wood to enter.





...

I think also it is going to be difficult to get past the wording on his
patent concerning how the devise is triggered, being touched.
...

Not all patent claims are defensible...

--