Patent ID: 7377718

Claim:
A retractable delineator, comprising: a housing having a first end, a second end, and sidewalls defining a cavity and at least one rail attached to at least one sidewall; a top plate disposed adjacent to the first end of the housing, the top plate having an opening defined therein; a post mounted inside the housing, the post sized to fit through the opening in the top plate; a drive system coupled to the post and engaged with the at least one rail and capable of moving the post through the opening in the top plate in a first direction and capable of moving the post in a second direction opposite the first direction; a conduit in fluid communication with the housing; and, a source of pressurized gas in fluid communication with the housing via the conduit such that the housing is continuously pressurized and a gasket positioned between the top plate and the post and the gasket for preventing water or debris from entering the cavity.