Three police officers were spat at, abused and threatened as they struggled to arrest a suspect at Colwick Country Park.
Threats were made after they tried to bring a suspect under control shortly after 3.35pm on Saturday afternoon.
Police had been called by concerned members of the public who reported seeing someone in possession of a knife.
During a search of the park the officers located a van they wanted to search and were immediately confronted by a man who made numerous threats to them and their families.
James Robinson, 34, has been charged with three counts of assaulting an emergency worker and using threatening, abusive or insulting words or behaviour towards another person with the intention to cause them harassment, alarm or distress.
Robinson, of Withern Road, Broxtowe, has been remanded into custody and will appear at Nottingham Magistrates’ Court this morning (July 19).
No knife was recovered at the scene.
Sergeant Janine Barnes, of Nottinghamshire Police, said: “Police officers and other emergency workers do a difficult and at times dangerous job and should simply not have to deal with this kind of behaviour.
“There is never a justification for abusing and assaulting our officers and we will always take very swift action against people who do.”