[TheForge] Power hammer questions/Frosty

Sat Apr 12 02:27:01 2003

No luck with the patent number. Is there a prefix to 707246?
Thanks,
Bob
----- Original Message -----
From: "Jerry Frost" <[email protected]>
To: <[email protected]>
Sent: Friday, April 11, 2003 12:33 PM
Subject: Re: [TheForge] Power hammer questions/Frosty


> 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" <[email protected]>
> To: <[email protected]>
> 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
> >
> >
>
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