Patent ID: 6253942
Filing Date: 2001-07-03
Classification: B65D

Abstract:
An improved, easy opening, screw-cap for threaded opening type containers comprising:a cap, of generally cylindrical configuration, with a top, bottom and outer circumferential surface, said outer circumferential surface of said cap being divided into two sections;an upper section of said cap, said upper section having a radial center, an outer circumferential surface and an inner circumferential surface, said upper surface being of generally cylindrical configuration;a lower section of said cap, said lower section having a radical center, an outer circumferential surface and an inner circumferential surface, said lower section being positioned below said upper section, said lower section utilizing the same radial center as said upper section, with an outer circumferential surface of said lower section being cylindrical in configuration, with a cross sectional diameter less than that of said upper section but greater than that of a container on which said cap is screwed;an internal cavity, of cylindrical configuration, said internal cavity being formed by said inner circumferential surface of both said upper section and lower section and said top of said cap, with vertical walls also forming said inner circumferential surfaces of said upper section and said lower section, said internal cavity extending from the bottom of said cap, vertically upward, terminating prior to reaching the top of said cap, with a cross sectional diameter of a consistent radial diameter and of a diameter such that a neck of said container can be inserted into said internal cavity;internal screw threads, located along the vertical walls of said internal cavity, and formed from said upper section and lower section of said cap, said internal screw thread designed to mate with said external threads located on the exterior surface of said neck of said container;grasping protrusions, located along said outer circumferential surface of said upper section, said grasping protrusion designed to assist in removal of said cap from said container, wherein each of three grasping protrusion projects horizontally outward from the radial center of said upper section of said cap, so as to form a cap of a generally rounded, triangular configuration in the horizontal plane;gripping ribs, located along said outer circumferential surface of said upper section and said lower section, said gripping ribs designed to create rotational friction for an operator's hands being used to remove said cap from said container.