[TheForge] Power hammer questions/Frosty

[Steve Smith]

What I'm thinking of doing for balance valves is to install a spring 
loaded valve on each end of my power cylinder. The valve would be opened 
by the piston pushing on a rod which actuates the valve. The valve at 
each end has it's own rod, the piston reaches near the end of it's 
travel, encounters the rod, and opens the valve. If one were clever, one 
could make these emergency overpressure relief valves by sizing the 
spring correctly.

Steve Smith

Bob Smolen wrote:
> 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
> 
>