Liquid-proof safety closure

Claim 2

A closure cap which comprises an end wall and a side wall depending therefrom, said side wall having a generally cylindrical inner surface, tightening means on said inner surface of said side wall for engagement with co-operating means on an outside peripheral surface of a neck wall of a container for causing relative axial closing movement of said cap on such a container into a closed position thereon on relative rotation of the cap and the container in one direction and relative axial separation of the cap and such a container into a released position of said cap on relative rotation of said cap and the container in an opposite direction, manually releasable detent means associated with said tightening means for retaining said cap in its closed position on the container, a cap liner disposed within said cap for disposition between said end wall of said cap and an end surface of the neck wall of the container on which said cap is disposed, and a resiliently deformable biasing means within said cap and comprising a plurality of fingers integrally formed with said end wall of said cap and extending obliquely and axially away from said end wall within said cap for axially biasing said cap liner into sealing engagement with the end surface of the neck wall of the container when said cap is rotated on the neck of the container into its closed position, each said finger being aligned with a corresponding opening in said end wall whereby, on rotation of said cap into said closed position thereof on the container, said fingers are resiliently flexed toward said end wall of said container.

Claim 3

A closure cap as claimed in claim 1 in which each said finger is resiliently flexed into said corresponding opening in said end wall of said cap on rotation of said cap into its closed position on the container.

Claim 4

A closure cap as claimed in claim 1 in which each said finger extends axially away from said end wall within said cap and generally radially outwardly therefrom toward said side wall.

Claim 5

A closure cap as claimed in claim 1 in which said fingers are disposed generally circularly on said end wall of said cap about an axis thereof so as to project axially therefrom within said cap.

Claim 6

A closure cap as claimed in claim 1 in which said cap liner is secured to said end wall of said cap through a central boss integrally formed with said end wall whereby said cap liner is deformed into an outwardly convex configuration on rotation of said cap on the container into its closed position and then resiliently restored into an essentially non-deformed generally planar configuration as said detent means permits limited axial separation of said cap and said container.

Claim 7

A closure cap as claimed in claim 1 in which said tightening means comprises a plurality of cam surfaces formed in said inner surface of said side wall of said cap and in which said detent means comprises a corresponding plurality of notches formed in said cam surfaces whereby, on engagement of said cam surfaces by outwardly projecting lugs formed on the neck wall of the container and on relative rotation of said cap and such a container, said cap is caused to move axially toward the neck wall of the container into said closed position of said cap and whereby, on movement of such lugs into said notches, said cap is retained on the container being releasable therefrom only by the application of axial pressure to the cap to cause the lugs to be moved out of said notches.

Claim 8

A closure cap as claimed in claim 6 in which said side wall of said cap is integrally formed with generally radially inwardly extending and angularly spaced apart lugs for retaining said cap liner within said cap.

Claim 9

A closure cap as claimed in claim 1, in which said tightening means comprises a plurality of cam surfaces formed in said inner wall surface of said side wall of said cap and in which said detent means comprises a corresponding plurality of notches formed in said cam surfaces whereby, on engagement of said cam surfaces by outwardly projecting lugs formed on the neck wall of the container and on relative rotation of said cap and such a container, said cap is caused to move axially toward the neCk wall of the container into said closed position of said cap and whereby, on movement of such lugs into said notches, said cap is retained on the container being releasable therefrom only by the application of axial pressure to the cap to cause the lugs to be moved out of said notches.

Claim 10

In combination, a container and a closure cap releasably securable on said container, in which said container including a neck wall, said closure cap comprising an end wall and a side wall depending therefrom, said side wall having generally cylindrical inner surface, and there also being provided tightening means on said inner surface of said side wall for engagement with co-operating means provided on an outside peripheral surface of said neck wall of said container for causing relative axial closing movement of said cap on said container into a closed position thereon on relative rotation of said cap and said container in one direction and relative axial separation of said cap and said container into a released position of said cap on relative rotation of said cap and said container in an opposite direction, manually releasable detent means associated with said tightening means for retaining said cap in said closed position thereof on said container, a cap liner disposed within said cap between said neck wall of said container and said end wall of said cap, and a resiliently deformable biasing means within said cap and comprising in turn a plurality of fingers integrally formed with said end wall of said cap and extending axially and obliquely away from said end wall of said cap within said cap for axially biasing said cap liner into sealing engagement with said end surface of said neck wall of said container when said cap is disposed on said container in said closed position thereof, each said finger being associated with a corresponding aligned opening in said end wall thereby, on rotation of said cap into said closed position on said container, said fingers are axially flexed toward said end wall.

Claim 11

In combination, a container and a closure cap releasably securable on said container, in which said container including a neck wall, said closure cap comprising an end wall and a side wall depending therefrom, said side wall having generally cylindrical inner surface, and there also being provided tightening means on said inner surface of said side wall for engagement with co-operating means provided on an outside peripheral surface of said neck wall of said container for causing relative axial closing movement of said cap on said container into a closed position thereon on relative rotation of said cap and said container in one direction and relative axial separation of said cap and said container into a released position of said cap on relative rotation of said cap and said container in an opposite direction, manually releasable detent means associated with said tightening means for retaining said cap in said closed position thereof on said container, a cap liner disposed within said cap between said neck wall of said container and said end wall of said cap, and a resiliently deformable biasing means within said cap and comprising in turn a plurality of fingers integrally formed with said end wall of said cap and extending axially and obliquely away from said end wall of said cap within said cap for axially biasing said cap liner into sealing engagement with said end surface of said neck wall of said container when said cap is disposed on said container in said closed position thereof, each said finger being associated with a corresponding aligned opening in said end wall thereby, on rotation of said cap into said closed position on said container, said fingers are axially flexed toward said end wall.

Claim 12

A combination as claimed in claim 9, in which said tightening means comprises a plurality of cam surfaces formed on said side wall of said cap and corresponding lugs formed on said neck wall and in which said detent means comprises a corresponding plurality of notches formed in said cam surfaces for receiving respective ones of said lugs when said cap is disposed in said closed position thereof whereby, on movement of said lugs into said notches, relative rotation of said cap and said container is prevented until said lugs are displaced from within said notches by the application of axial pressure to said closure cap.

Claim 13

A combination as claimed in claim 9 in which said side wall of said cap is integrally formed with inwardly extending and angularly spaced apart lugs for retaining said cap liner within said cap.

Claim 14

A combination as claimed in claim 9 and in which said side wall of said cap is integrally formed with inwardly extending and angularly spaced apart lugs for retaining said cap liner within said cap.