Granted Patent B1

US 7,815,061 · App. 11/278,190 · Granted Oct 19, 2010

Abstract

Claims (13)

1. A push and turn child resistant two-piece closure comprising:

an under cap rotationally retained within an over cap, said over cap having a plurality of push and turn over cap features in engagement with a plurality of push and turn under cap features on said under cap;

a central stem extending upward from a top surface of said under cap and is received within a receptacle on a bottom surface of a top wall of said over cap;

said under cap having said top surface engaging said bottom surface of said over cap only when downward pressure is applied to said over cap;

said engaging interface between said bottom surface of said over cap and said top surface of said under cap having a friction ring interposed therebetween, wherein said friction ring having an inner diameter and an outer diameter;

said friction ring made of a highly frictional material to aid in the counter clockwise rotation of said push and turn child resistant two piece closure when only downward pressure and rotation is applied to said over cap to remove said closure from a container neck; and

wherein said under cap top surface has a mating contacting ring in alignment with said friction ring.

2. A push and turn child resistant two-piece closure of claim 1 , wherein said friction ring is affixed against said bottom surface of said over cap.

3. A push and turn child resistant two-piece closure of claim 1 , wherein said friction ring made of thermo-plastic elastomer.

4. A push and turn child resistant two-piece closure of claim 3 , further including a grip ring affixed against an outer surface of said over cap.

5. A push and turn child resistant two-piece closure of claim 4 , wherein said friction ring and said grip ring are in channel flow communication when said friction ring is molded.

6. A push and turn child resistant two piece closure of claim 1 , wherein said friction ring is made of thermo-plastic elastomer and said over cap and said under cap are made of polypropylene.

7. A push and turn child resistant two piece closure of claim 1 , wherein said over cap and said under cap are made of a first material, said friction ring is made of a second material, said first material having a much lower coefficient of friction than said second material.

Assignments (38)