US3674295A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Pressure operated fastening means for containers
Assignee: Individual
•
Filing: 1970-05-08
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Granted: 1972-07-04
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Expires: 1990-05-08
Abstract
Abstract A pressure operated fastening means for container comprising hinged male and female halves, the male half comprising a cylindrical stub chamfered at its end portion and provided with hemispherical projections, which may be hollow or in the form of solid spherical pips, positioned generally midway between the head and the foot of the stub. The female half includes a circular ring of relatively greater thickness than the adjoining lateral wall, with insertion of the male half during fastening subjecting the projections to compression by the circular ring, with the projections upon further insertion forcing the relatively thinner lateral wall inwardly to effect the desired fastening.
Inventors
- 👤 Pietro Padovani
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 17:44
CPC Classifications
B; B65; B65D; B65D85/00; B65D85/30; B65D85/32; B65D85/324; Y; Y10; Y10S; Y10S292/00; Y10S292/38; Y10T; Y10T24/00; Y10T24/45; Y10T24/45225; Y10T24/45602; Y10T24/45775; Y10T292/00; Y10T292/08; Y10T292/0801; Y10T292/0814; Y10T292/0817; Y10T292/0876; Y10T292/088; Y10T292/68
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
164 words
Pressure-operated fastening means for containers comprising two hinged halves, which closure means is produced integrally with the container by vacuum moulding a thin sheet of thermoplastic material such as polystyrol, P.V.C., and the like, said means being constituted by a recess contained in a hollow frusto-conical part projecting from the surface of one half of the container, which recess adjoins a circular ring having a thickness greater than the lateral wall of the recess and than the lateral wall of the part constituting the support for the female element, the means also comprising a male element formed by a hollow cylindrical stub, which is sharply chamfered at its end portion and is closed by a circular disc and is located on a hollow frusto-conical base projecting from the surface of the other half of the container characterized in that hemispherical projections are provided on the male element at roughly midway between its head and foot, and in that the female element is outwardly curved.
Claim 2
Dependent Claim
164 words
Pressure-operated fastening means for containers comprising two hinged halves, which closure means is produced integrally with the container by vacuum moulding a thin sheet of thermoplastic material such as polystyrol, P.V.C., and the like, said means being constituted by a recess contained in a hollow frusto-conical part projecting from the surface of one half of the container, which recess adjoins a circular ring having a thickness greater than the lateral wall of the recess and than the lateral wall of the part constituting the support for the female element, the means also comprising a male element formed by a hollow cylindrical stub, which is sharply chamfered at its end portion and is closed by a circular disc and is located on a hollow frusto-conical base projecting from the surface of the other half of the container characterized in that hemispherical projections are provided on the male element at roughly midway between its head and foot, and in that the female element is outwardly curved.
Claim 3
Dependent Claim
12 words
The fastening means of claim 1 wherein said hemispherical projections are hollow.
Claim 4
Dependent Claim
13 words
The fastening means of claim 1 wherein said hemispherical projections comprise spherical pips.
Claim 5
Dependent Claim
23 words
The fastening means according to claim 1, characterized in that the hemispherical projections are provided at diametrally opposite points on the male element.
Claim 6
Dependent Claim
36 words
The fastening means according to claim 1, characterized in that the ring connecting the female element to its frusto-conical support is of a thickness approximately equal to the maximum thickness of the half of the container.
Claim 7
Dependent Claim
28 words
The fastening means according to claim 1, characterized in that the thickness of the female element diminishes from the ring, joining it to the support, towards its base.
Claim 8
Dependent Claim
34 words
The fastening means according to claim 1, characterized in that the male element has reinforcing ribs extending from the base of each hemispherical projection to the foot of the support of the male element.
Claim 9
Dependent Claim
19 words
The fastening means according to claim 1, characterized in that the hemispherical projections are aligned in a single plane.
Claim 10
Dependent Claim
22 words
ThE fastening means according to claim 1, characterized in that the hemispherical projections are disposed in at least two different parallel planes.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-07-04 | 1976-01-03 | 1976-07-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-07-04 | 1980-01-03 | 1980-07-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-07-04 | 1984-01-03 | 1984-07-04 | $7700.00 | Window Closed / Lapsed |