Radiator assembly (bayonet lock)

A tank assembly of the type utilized in a heat exchanger such as a radiator, said assembly comprising;

• a tank wall having an opening, a cylindrical spout extending from said opening in said tank wall, said spout having a lower portion extending into said opening, said lower portion having at least two radially extending tabs, said opening having a skirt extending inwardly from said tank wall, said skirt having at least two cam/lock sections with each cam/lock section including a cam surface leading from a receiving end to a locking recess, said cam surface increasing in distance from said tank wall in the direction from said receiving end thereof to said locking recess, said spout and said tank wall having radially extending overlying portions, and sealing means disposed between said overlying portions, said tabs being disposed in said locking recesses to compress said sealing means between said overlying portions and retaining said spout in said opening, said overlying portion of said tank wall defining an annular seal recess to define an annular shoulder for radially retaining said sealing means in said recess, said spout including an upper cylindrical portion of a greater diameter than said lower portion thereof, said overlying portion of said spout comprising a radially extending shoulder integrally interconnecting said upper and lower portions, the outer diameter of said upper portion of said spout being no greater than the diameter of said annular shoulder of said seal recess.