Dirk,
Your actions would be why you were being questioned to begin with, of course.
If your actions are suspicious and you are questioned, the cop make take the knife from you or he may not depending on the circumstances.
Admitting a knife is a weapon won't get you arrested unles there are other extenuating circumsances which brought the stop to begin with.
I can readily admit it is a weapon, and then show him the dangerous "weapons" statute that covers knives. If the knife isn't illegal by law and I'm not breaking the law they have no reasonable suspicion to arrest. I was LE for 9 years and had to deal with these issues as well over that short timeframe.
The law states that I can carry a knife not restricted. It's a weapon but an accepted weapon under my states laws.
Pretty hard to explain away as a tool something like the "sifu" or "hobitt" even if they are not restricted in that particular jurisdiction.
I carry nothing "illegal" by law in my state. I have no fear of an LE arresting me for abiding by the law. Cops need probable cause to arrest. That probable cause could mean being in the wrong area of town at the wrong time of day/night [ depending on your answers ], violating a dangerous weapons statute by object description, your actions reported by others witnessing your breaking a law he can charge you with [ in my state it has to be a felony though if relied upon from witnesses statements and not actually observed by the cop ].
I have given no substance to any pending charges unless my actions were such that he could reasonably believe I was about to use the knife in the furtherance in commision of a crime.
Have had them taken away and returned later after the chief was educated the particular knife was not "contraband/illegal" by law as the officer presumed at the time of the confiscation.
Keep in mind that if a cop takes your weapon which is not restricted by law he has stolen your personal property. He has no rights to take property not legally contraband or being used in the furtherance of a crime and his ignorance of the law is no more an excuse for his actions than others ignorance they were in violation of a restricted dangerous weapon.
I instruct LE's from across the country and most have no idea what the restrictions on knives are, and as well, they usually are wrong when asked to cite the law in their states [ usually I just use the blade length as the question and no other criteria ].
I'll hold a Bowie knife with a 12" blade up and ask them if this is illegal to posses in public. All but a few answer yes. Then I pass out the "dangerous weapons" statutes, give them time to read the few paragraphs and reask the question. They are in shock that they have confiscated [ for mere possesion with no other extenuating circumstances ] hundreds of knives illegally.
In my state, there is no blade length restriction, and in fact 1994 case law expressly exempts " kitchen knives, swiss army knives, and folding type knives" with exceptions for autos being illegal.
If you are not breaking the law, know the laws as to what is restricted and not restricted in your area, can cite the code or better yet show them the law in writing at the time of questioning they have no grounds to confiscate.
Educating LE's relative the dangerous weapons laws and bringing them up to speed on relavant issues is always rewarding. I hope in some way that I further the cause of knife owners everywhere by doing so.
We, as a collective body with similair interests, have a responsibility to make sure we are on "terra firma" when we carry objects on our person which may be questioned as the their legality.
Sure some officers are easy going and will react as you have described. I'm more apt to point out I have numerous weapons on me and look forward to educating an officer on the street who happens to get aggressive at my response.
Having the experience of working in the profession and working within the court systems in my jurisdictions over the years I enjoy educating the officers less knowledgable than I on these issues. I'm not a kid at 52, do not look like a troubled wanderer, am capable of articulating my reasoning and actions and he should be prepared to do the same.
I think many here are afraid to "deal" with LE's on the street. These types give off indications they are unsure of their actions and the officers certainly pick up on these types and if they want to can then choose to further theor views and confiscate without much fear of hearing anything further about it.
Brownie