Patent ID: 8403177

Claim:
Pressurized can comprising a body ( 2 ), a dome ( 3 ) accommodating a valve ( 4 ), a concavely shaped bottom ( 5 ), an inner casing ( 7 ) attached to a cup ( 6 ), a push rod ( 9 ) arranged in the inner casing ( 7 ), said push rod ( 9 ) being actuated through the cup ( 6 ) and intended to force open the inner casing ( 7 ), with said inner casing ( 7 ) being joined to the cup ( 6 ) via a spring cage ( 11 ), said spring cage ( 11 ) containing a spring-loaded trigger ( 12 ) which acts on the push rod ( 9 ) which, in turn, acts on a cover ( 8 ) arranged at the can-side end of the inner casing ( 7 ), characterized in that a portion of the inner casing ( 7 ) defines the cover ( 8 ), wherein the cover ( 8 ) is a membrane integral with and forming one piece with the inner casing ( 7 ) which seals the inner casing ( 7 ) at its can-side end hermetically against the contents of the pressurized can ( 1 ) and which is torn open by the push rod ( 9 ) when the trigger ( 12 ) is actuated, wherein the pressure inside the inner casing ( 7 ) is lower than the pressure outside the inner casing ( 7 ) and said membrane is comprised of a material sufficiently flexible so that in response to the higher pressure outside the inner casing ( 7 ), said membrane bulges into said inner casing ( 7 ).