I was talking with a few designers last week about how most urinals are designed terribly. Key features of a bad urinal design as we came up with them:
1) Back of interior is perpendicular or fairly perpendicular to user, causing high amount of splashing.
2) Height restrictive for either taller or shorter users.
3) Inaccessible for cleaning (we came up with some designs not meeting this feature but otherwise great).
4) Looks similar to a sink or toilet (non-intuitive design).
Obviously, decreasing water usage is a big topic in bathroom fixture design (whether through gravity assistance, hydrophobic coatings, etc.). This is not a requirement, but thing I've been keeping in mind. All of the low-water usage urinals I've examined don't meet features 1 or 2 as mentioned above.
We came up with 2 decent designs, but both of them came away to a certain amount of inaccessibility for cleaning without including clamshell-like hinges. Both also incorporated conch shell style curls so as to redirect streams downward without splashing. Can anyone think of a way to meet the low splash feature and the cleaning accessible feature simultaneously without using a high amount of water?