My mower is an IH mower. it has two 'legs' that run to the back and attach where the drawbar bolts are, on either side of the final drives., then it is supported in the middle by two chains that converge into one, and then attach to a hanger ont he rock shaft. The mower thus pivots on the rear legs.
The blade pivots on a rod thru bushings in a square tubing under the front pedistal, and has a top attach point where a lever is attached with a free rotating pin. The end of that curved lever attaches to a top connection on the hyd rocker, also on a free rotating pin. The bracket the blade mounts on is thus fixed, and can not interfeer with the front of the mower going up. If the mower went up that higk, the drive pulley would surly be touching the oil pan, etc.
Mid you this is a home brew setup. that top curved lever is a piece of flat, bent, then with a stiffener welded along the flat. The stiffener is cut into about 4 sections, each bent, and welded on, to make it around the outer circumference of that bent lever.. etc.
I wouldn't push hard material with it.. but should be fine in snow.. etc.
Also serves as a great 'stump' guard when mowing.
Soundguy