Child resistant closure for a container
View Patent ↗The present invention relates to a child resistant closure for a bottle or container. More specifically, the present invention relates to improved two-cap structure assemblies.
1. A closure comprising:
an inner shell comprising:
a. a first upper portion having an outer surface; and
b. a first lower portion comprising an annular side wall depending downwardly from an outer periphery formed by the first upper portion, the annular side wall of the first lower portion having an outer surface and a first inner surface, the outer surface of the first lower portion comprising one or more inner shell cams projecting outwardly from the outer surface;
an outer shell rotatably housing the inner shell, the outer shell comprising:
c. a second upper portion having an inner surface;
d. a second lower portion comprising an annular side wall depending downwardly from an outer periphery formed by the second upper portion, the annular side wall having a second inner surface comprising:
i. outer shell side wings projecting inwardly from the second inner surface and disposed substantially within a plane for engaging one or more inner shell cams, the plane defining an acute angle with the second inner surface, the side wings bendable outwardly toward the second inner surface; and
ii. wing recess areas having a depth t′ disposed within the second inner surface and adjacent to the outer shell side wings to receive the outer shell side wings once the outer shell side wings are bent outwardly toward the second inner surface.
2. The closure according to claim 1 wherein the first inner surface comprises threads.
3. The closure according to claim 1 wherein the outer surface of the first lower portion comprises an inner shell retainer segment.
4. The closure according to claim 3 wherein the inner surface of second lower portion comprises an outer shell retainer segment structured to rotatably retain the inner shell retainer segment within the outer shell.
5. A method of reducing friction between outer shell side wings and inner shell cams of a closure comprising the steps of:
providing an inner shell comprising:
a. a first upper portion having an outer surface; and
b. a first lower portion comprising an annular side wall depending downwardly from an outer periphery formed by the first upper portion, the annular side wall of the first lower portion having an outer surface and a first inner surface, the outer surface of the first lower portion comprising one or more inner shell cams projecting outwardly from the outer surface;
providing an outer shell comprising:
a. a second upper portion having an inner surface;
b. a second lower portion comprising an annular side wall depending downwardly from an outer periphery formed by the second upper portion, the annular side wall having a second inner surface comprising:
i. outer shell side wings projecting inwardly from the second inner surface and disposed substantially within a plane for engaging one or more inner shell cams, the plane defining an acute angle with the second inner surface, the side wings bendable outwardly toward the second inner surface;
providing wing recess areas having a depth t′ disposed within the second inner surface and adjacent to the outer shell side wings to receive the outer shell side wings once the outer shell side wings are bent outwardly toward the second inner surface; and
rotatably housing the inner shell within the outer shell.
6. The method of according to claim 5 , wherein the closure is a two cap closure.