It didn't seem like I did a good job of explaining my little dog gate, so I took a couple of photos this morning.
This is a picture of the front side of the gate. It's pretty low, so less of a trip hazard. Still keeps the dog out though!
Here is a picture from above. See how it clamps to the center piece of the door frame? If you look carefully, you can see the felt dots I installed to keep the wood from scuffing the door frame.
Lastly, here is a picture from behind. Here the felt buttons are easy to see. I slotted the back rails so that they could slide over to remove the gate. It's not a pretty piece of work, but it's practical and I thought it was cool enough to share.
Come and meet my little friend... The Ridgid TS2424