Patent US3770153A successfully refreshed from Google Patents.
US3770153A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Safety closure
Assignee: Silgan Plastic Food Containers Corp
•
Filing: 1972-08-04
•
Granted: 1973-11-06
•
Expires: 1992-08-04
Abstract
Abstract A safety closure for a container is disclosed. The container has a threaded neck, a shoulder, and one or more lug recesses and preceding camming surfaces on the periphery of the shoulder. The cap has an internally threaded inner wall and an outer, flexible, spaced concentric skirt. The skirt has one or more downwardly protruding lugs on its lower edge. Rotation of the cap relative to the bottle causes the lug to engage a camming surface. Continued rotation of the cap leads the lug into the lug recess, releasably locking the cap upon the container neck. The cap is removed by first applying an inward squeezing force to the cap skirt thereby flexing the lug outwardly to disengage the lug from the lug recess after which the cap can be rotated freely in a direction to unscrew the cap. In another embodiment, the container neck and cap have one or more partial threads so that the cap is thrust onto the neck which also cams the lug or lugs outwardly and then the cap is turned through only a partial revolution to engage the threads and move the lug into the recess.
Inventors
- 👤 P Gach
- 👤 H Leonard
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 23:35
CPC Classifications
B; B65; B65D; B65D50/00; B65D50/02; B65D50/04; B65D50/045; B65D50/046
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
121 words
A safety closure comprising a container and a cap, said container having a bottom, a sidewall, a neck and an annular shoulder extending between said neck and said sidewall, and at least one lug recess in said container adjacent the periphery of said shoulder, said cap having a top, an inner wall depending from said top, cooperating means on said closure neck and said inner wall for retaining said cap in closed position on said container, an outer skirt depending from said top in concentric relationship to said inner wall, said skirt including at least one depending lug having a lower portion extending below the bottom of said inner wall, and camming means for guiding said lug toward such lug recess.
Claim 2
Dependent Claim
121 words
A safety closure comprising a container and a cap, said container having a bottom, a sidewall, a neck and an annular shoulder extending between said neck and said sidewall, and at least one lug recess in said container adjacent the periphery of said shoulder, said cap having a top, an inner wall depending from said top, cooperating means on said closure neck and said inner wall for retaining said cap in closed position on said container, an outer skirt depending from said top in concentric relationship to said inner wall, said skirt including at least one depending lug having a lower portion extending below the bottom of said inner wall, and camming means for guiding said lug toward such lug recess.
Claim 3
Dependent Claim
37 words
A safety closure according to claim 1 wherein said camming means comprises a bevelled inner surface on the lower end of said depending lug, whereby said bevelled surface engages said shoulder as said cap is moved downwardly.
Claim 4
Dependent Claim
39 words
A safety closure according to claim 1, wherein said camming means comprises a container camming surface on said shoulder adjacent its periphery, whereby when the cap is moved downwardly, said lug engages said camming surface and is urged outwardly.
Claim 5
Dependent Claim
27 words
A safety closure according to claim 3, wherein said cap includes two opposed lugs depending from said skirt and said container shoulder has two opposed camming surfaces
Claim 6
Dependent Claim
25 words
A safety closure according to claim 1, wherein said cooperating means consists of external threads on said neck and internal threads on said inner wall.
Claim 7
Dependent Claim
176 words
A combination safety closure comprising a container and a unitary screw-on cap, said container having a bottom, a cylindrical sidewall, a threaded neck and shoulder extending between said threaded neck and said sidewall, said container shoulder having at least one camming surface defined at its outer periphery, at least one lug recess at the outer periphery of said container shoulder, said screw-on cap having a top, a downwardly extending threaded inner wall for mating with said threaded neck of said container, and an outer, spaced, concentric, resilient skirt depending from said top, said skirt extending below said inner wall, said skirt having at least one downwardly protruding locking lug, said lug overlying and being in an engageable relationship with said container camming surface, whereby when said cap is screwed onto said container, said lug engages said camming surface and is moved outwardly and whereby continued rotation of said cap moves said lug to said recess and the resiliency of said skirt snaps said lug into said lug recess, releasably locking said cap upon said container neck.
Claim 8
Dependent Claim
176 words
A combination safety closure comprising a container and a unitary screw-on cap, said container having a bottom, a cylindrical sidewall, a threaded neck and shoulder extending between said threaded neck and said sidewall, said container shoulder having at least one camming surface defined at its outer periphery, at least one lug recess at the outer periphery of said container shoulder, said screw-on cap having a top, a downwardly extending threaded inner wall for mating with said threaded neck of said container, and an outer, spaced, concentric, resilient skirt depending from said top, said skirt extending below said inner wall, said skirt having at least one downwardly protruding locking lug, said lug overlying and being in an engageable relationship with said container camming surface, whereby when said cap is screwed onto said container, said lug engages said camming surface and is moved outwardly and whereby continued rotation of said cap moves said lug to said recess and the resiliency of said skirt snaps said lug into said lug recess, releasably locking said cap upon said container neck.
Claim 9
Dependent Claim
24 words
The safety closure of claim 6 wherein said camming surface of said container shoulder consists of a bevelled edge extending toward each lug recess.
Claim 10
Dependent Claim
15 words
The safety closure of claim 6 wherein said protruding lug has a bevelled inner surface.
Claim 11
Dependent Claim
44 words
The safety closure of claim 6 wherein said container shoulder and sidewalls define a pair of circumferentially spaced lug recesses, and wherein said concentric skirt has a pair of circumferentially spaced lugs complementary with said recesses, for releasably locking said cap to said container.
Claim 12
Dependent Claim
42 words
In a combination safety closure according to claim 6, the improvement comprising a circumferentially extending series of lug recesses in the container shoulder which are sequentially engaged by the locking lug when the cap is screwed more tightly onto the container neck.
References Cited (Backward Citations)
US3633789A
Cited
US3698584A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-11-05 | 1977-05-07 | 1977-11-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-11-05 | 1981-05-07 | 1981-11-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-11-05 | 1985-05-07 | 1985-11-06 | $7700.00 | Window Closed / Lapsed |