It depends a lot on the airport and who you are flying with this sort of thing so I can't give you a definative answer. However they have started to be very picky about ANY kind of sharp object whatsoever. If this is the knife in question:

http://www.midwestgunexchange.com/itemdetails.cfm?id=5963

I would say little to no chance as it looks like a knife (which it is) regardless of the rounded nose they probably are not going to let you take it on your person. They have stopped me for having a pair of nail clippers before, so I would be very surprised if they let you carry anything like that.

Nowadays I would say to always put anything remotely sharp into your hold baggage (anything from scissors to nail clippers to knives of all desciptions) as chances are they will take it off you at security and the number one method for never seeing something again when you get to the other end is if they take it off you at security.