Safety assembly for a medical delivery device

A safety assembly for a medicament delivery device comprising:

• a housing having a terminal face at a proximal end;
• and
• a tubular cover partially contained inside of the housing and axially slidable relative to the housing from a first position to a second position and then to a third position, the tubular cover having a housing nib and a cap nib, where each of the cap nib and housing nib protrudes radially outward from an outer surface of the tubular cover and are located at a proximal end of the tubular cover,
• where in the first position the housing nib and cap nib are located outside of the housing with the housing nib abutting the terminal proximal face of the housing, where in the second position both the cap nib and housing nib are positioned inside of the housing, and where in the third position both the cap nib and the housing nib are located outside of the housing and the housing nib is not in abutment with the housing and the tubular cover is axially locked to prevent movement relative to the housing.