You don't really need a mechanism to follow the entire range of motion, you
just need a snubber that effects/engages (maybe) the last 4-10" of closing.

A hydraulic cylinder with a built-in snubber would probably be more
difficult to locate and/or more expensive.

A snubber could be a common cylinder with a light duty spring to extend the
ram, and a needle/restrictor valve to adjust how fast the ram can be pushed
into the cylinder.
The check valve in parallel with the restrictor would be optional. The
spring will slowly extend the ram.

But it's still a scissors gate.

--
WB
..........
metalworking projects
www.kwagmire.com/metal_proj.html


"Tim Wescott" wrote in message
...
On Fri, 05 Feb 2010 12:30:47 -0500, Wild_Bill wrote:

It seems a bit confusing, when you stated in an earlier post that the
gate is a scissors-type gate, and they're normally opened and closed
horizontally (not vertically).

I wouldn't consider lifting something of that length and weight to be a
safe (or practical) method of entry/exit.

And you call yourself "Wild" Bill...

First, it came that way, and second, it's counterbalanced with springs.
There's not much load out on the end of it, but if it's going fast when
it hits the stop it sure makes a bang.

--
www.wescottdesign.com