초록 ▼

A closure vessel assembly for use in laboratory work within a range of temperature from -196.degree. C. to 100.degree. C. above zero includes a vessel made of a plastic material and having a wall defining the vessel mouth, and a closure for closing the vessel. The closure has an annular sealing lip

A closure vessel assembly for use in laboratory work within a range of temperature from -196.degree. C. to 100.degree. C. above zero includes a vessel made of a plastic material and having a wall defining the vessel mouth, and a closure for closing the vessel. The closure has an annular sealing lip which depends from the top wall of the closure and extends into the vessel mouth when the closure is locked on the vessel. The sealing surface of the sealing lip engages the sealing surface of the vessel wall, in the locked position of the closure with the vessel, to provide a seal therebetween. The respective radii of the sealing surfaces of the sealing lip and the wall are selected so as to provide for minimum surface pressure yet sufficient sealing between the sealing surfaces, despite any deformation of the materials of the sealing surfaces during the required closing time of the vessel.

대표청구항 ▼

[ We claim:] [1.] A closure vessel assembly for use in laboratory work within a range of temperature between -196.degree. C. and +100.degree. C., and capable of maintaining required sealing characteristic within said temperature range for at least 20 min, the vessel assembly comprising;a vessel made

[ We claim:] [1.] A closure vessel assembly for use in laboratory work within a range of temperature between -196.degree. C. and +100.degree. C., and capable of maintaining required sealing characteristic within said temperature range for at least 20 min, the vessel assembly comprising;a vessel made of a plastic material and having a wall which defines an upper mouth, and a fluid volume of up to several milliliters;a closure made of a plastic material for closing said vessel and having a top wall and a side wall;means for locking said closure with said vessel, andsealing means located between said vessel and said closure,wherein said sealing means comprises an annular sealing lip dependent from said top wall of said closure and having a lip sealing surface, and a convex sealing surface formed on said wall of said vessel and engageable by said lip sealing surface;wherein said lip sealing surface extends from said top wall at an acute angle toward a central axis of said vessel and has an infinite radius of curvature, and said convex sealing surface has a radius of 1 mm;wherein said locking means comprises cooperating helical threads formed on an internal surface of said side wall of said closure and on an external surface of said wall of said vessel;wherein said convex sealing surface is formed on an internal rim of said wall of said vessel; wherein said closure has a modules of elasticity andwherein said sealing lip has a truncated shape.