US3684115A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Safety closure
Assignee: Individual
•
Filing: 1971-02-01
•
Granted: 1972-08-15
•
Expires: 1991-02-01
Abstract
Abstract A childproof safety closure of two parts, one part having a skirt with internal screw threads to form a conventional screw cap closure, the second part being an overcap completely covering the threaded closure member and being freely rotatable in relationship thereto, said overcap having on its top a projecting stud and a similar shaped opening which serves as a key for unscrewing the inner closure member of another closure of similar construction.
Inventors
- 👤 Richard W Birch
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 07:17
CPC Classifications
B; B65; B65D; B65D50/00; B65D50/02; B65D50/06; B65D50/067; B65D50/068
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
186 words
A safety closure having in combination an inner cap closure member and an overcap member, said inner cap having a skirt with internal threads and a flat top having a recess therein, the inner walls of the recess varying in distance from the vertical axis of said cap, the overcap completely covering the outer surface of the inner cap and being freely rotatable with respect thereto, means for preventing the overcap from being removed from the inner cap, said overcap having on its top an upwardly extending stud and an opening of substantially the same configuration, both stud and opening being symmetrically located on opposite sides of the axis of said overcap, the height of said stud being greater than the thickness of the top of said overcap, the inner wall of the recess of the threaded closure member being at one point a distance from the axis of the closure greater than that of the outermost wall of the stud from the axis of the closure and at one point being less than the outermost wall of said stud from the axis of said closure.
Claim 2
Dependent Claim
186 words
A safety closure having in combination an inner cap closure member and an overcap member, said inner cap having a skirt with internal threads and a flat top having a recess therein, the inner walls of the recess varying in distance from the vertical axis of said cap, the overcap completely covering the outer surface of the inner cap and being freely rotatable with respect thereto, means for preventing the overcap from being removed from the inner cap, said overcap having on its top an upwardly extending stud and an opening of substantially the same configuration, both stud and opening being symmetrically located on opposite sides of the axis of said overcap, the height of said stud being greater than the thickness of the top of said overcap, the inner wall of the recess of the threaded closure member being at one point a distance from the axis of the closure greater than that of the outermost wall of the stud from the axis of the closure and at one point being less than the outermost wall of said stud from the axis of said closure.
Claim 3
Dependent Claim
63 words
A safety closure in accordance with claim 1 in which the recess in the top of the inner cap is ellipsoidal in configuration and the cross-sectional area of the upwardly extending stud on the overcap and the area of the opening in the top of the overcap when taken together have an ellipsoidal area slightly smaller than the ellipsoidal areA of the recess.
Claim 4
Dependent Claim
52 words
A safety closure in accordance with claim 1 in which the means for preventing the overcap from being removed from the inner cap is an inwardly extending lip on the lower section of the skirt of the overcap having an internal diameter less than the external diameter of the threaded closure member.
References Cited (Backward Citations)
US3138277A
Cited
US3412886A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-08-15 | 1976-02-14 | 1976-08-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-08-15 | 1980-02-14 | 1980-08-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-08-15 | 1984-02-14 | 1984-08-15 | $7700.00 | Window Closed / Lapsed |