Push and lock child-resistant closure

A rotationally free child-resistant closure for containers convertible to a screw-type closure by a push button selector, comprising;

• an inner cap member including a circular top portion and an annular skirt depending from the periphery thereof, the inner cap skirt having rotational engagement means formed thereon for engagement with container rotational engagement means, the inner cap top portion including a bottom surface adapted to close the open mouth portion of a container and a top surface having rotational driving means formed thereon;
• an outer cap member including a circular top portion and an annular skirt depending from the periphery thereof, the outer cap member encompassing said inner cap member, the outer cap member top portion having an opening formed therethrough and an axial locking lug depending from the lower surface of said outer cap member top portion, the outer cap member skirt having swivel connection with said inner cap member skirt that permits free rotational and limited axial movement therebetween sad inner and outer cap members;
• a selector member including an upstanding top portion and a perpendicular bottom portion, the selector top portion being axially insertable in said outer cap opening, the selector bottom portion including at least one opening formed therethrough where said outer cap member axial locking lug is axially insertable for transmission of rotational torque therebetween said outer cap and selector members while permitting limited axial movement therebetween said outer cap and selector members;
• said selector member top portion having a radial flexible axial locking arm within the included angle of said selector member bottom portion opening, the selector member axial locking arm including a perpendicular lip portion;
• spring elements formed on one of said inner or outer cap members engaging a portion of other said cap member, the spring elements adapted to hold said outer cap member in an axial relative outward first position, said spring elements adapted to yieldingly bend radially inwardly thereupon axial inward force applied thereto the outer cap member to allow said outer cap member to move axially inward to an axial relative inward second position, said spring elements adapted to yieldingly urge said outer cap member toward said axial relative outward first position thereupon being bent radially inwardly, said spring elements adapted to stand rigidly vertical therewith said outer cap member axial relative outward first position;
• said outer cap member axial locking lug including a flat bottom face and an interal cam detent extending axially upward therefrom, the integral cam detent adapted to receive said selector member axial locking arm lip portion when said selector member is in an axial relative outward first position thereby retaining said selector member in said axial relative outward first position, said integral cam detent adapted to cammingly move said selector member axial locking arm lip portion radially inwardly to cause said selector member axial locking arm to bend radially inward therewith axial inward movement of said selector member, said outer cap member axial locking lug bottom face adapted to receive said selector member axial locking arm lip portion thereupon said selector member in an axial relative inward second position;
• said selector member bottom portion including rotational driving means formed thereon, the selector member bottom portion rotational driving means adapted to drivingly engage said inner cap member top portion rotational driving means in the opening rotational direction only when said selector member is in said axial relative inward second position;
• said outer cap member axial locking lug bottom face adapted to receive said selector member axial locking arm lip portion only when said outer cap member is in said axial relative outward first position.