[TheForge] Krause/Nazel type air hammer

[Jerry Frost]

A number of years ago I did the same thing but didn't have anybody to bounce
it off. And I couldn't find anybody willing to let me take their's apart.
<sigh>

In principle it's dirt simple; a pair of synchronized high volume valves.
What I couldn't resolve to my satisfaction was the travel distance of the
ram cylinder. All I came up with was a pressure bypass to the return side.
Like I say, unsatisfactory. (I think)

Mike's pics of his Onions and Alldays valves didn't tell me how it works but
did verify my thoughts on valve type. Almost any type of high volume valve
should work fine, the simpler the better.

If I can figure out the porting, etc. I'd be tempted to use the simplest
valves possible, either flap, reed or piston port. My question at this point
is: Why spool valves? Or are they only on the control/primary circuit with
another set of valves handling the direct air from/to the rams?

Frosty
------------------------
If it ain't forged
it ain't real.
Wrought iron is.
The FrostWorks

Meadow Lakes, AK.


----- Original Message -----
From: "Shannell Sugrue" <sjs@ihug.com.au>
To: <theforge@mailman.qth.net>
Sent: Thursday, December 12, 2002 10:47 PM
Subject: Re: [TheForge] Krause/Nazel type air hammer


> Yeah me too, I drew up an idea I had on how it worked, ran it by an
engineer
> friend of mine and he had some suggestions but said it looked good, seemed
> too simple though, but Ive never seen how this "krause" type valve works
and
> it seems pointless reinventing the wheel.
>