[TheForge] Power hammer questions/Frosty

[Jerry Frost]

This is the URL for esp@cenet, the patent server I've figured out how to
search.

http://ep.espacenet.com/

Enter 707246 in the patent number search box and the Massey patent will come
up. It will also come up at the US patent server but you need the viewer,
it's a free download though. esp@cenet is easy to search but doesn't go back
very far and unfortunately I haven't figured out how to search the US patent
server, it goes back to the 1770's or so. Typical of a gvt "service, it
wants an exact name, patent number, etc. If I knew those things I wouldn't
need to search. <sigh>

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

Meadow Lakes, AK.


----- Original Message -----
From: "Bob Smolen" <boka@mwt.net>
To: <theforge@mailman.qth.net>
Sent: Thursday, April 10, 2003 10:52 PM
Subject: Re: [TheForge] Power hammer questions/Frosty


> Frosty,
> Thanks for the comments.I now understand your comment re knocking out the
> end of the cylinder. You were talking about the up stroke.
> I like the idea of shortening the stroke to equalize the displacement
ratio.
> This will cause less side pressure on the power cylinder piston rod, less
> vibration,less work for the crank and motor.
> I should correct my description of the "balance valve"I am using. These
are
> flats, not grooves. They are ,as you said, like flats on a wrench.
> I will try a check valve next. The valve at the hydraulic shop is pretty
> large and there is a threshold pressure to overcome before it opens. I
dont
> know if the pressure generated in my set up will overcome that pressure.
Any
> homemade check valve or alternative suggestions?
> Any way you can e-mail  me a copy of the Massey drawings or can you
explain
> how to get to the patent?
> I have gone to the uspto site and can never figure out how to access older
> patent drawings.
> Thanks again,
> Bob S
>
>