Patent US4211337A successfully refreshed from Google Patents.
US4211337A
Expired / Lapsed
US
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Multiple-point hinge for double-wall plastic box
Assignee: 3M Co
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Filing: 1979-06-08
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Granted: 1980-07-08
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Expires: 1999-06-08
Abstract
Abstract Hinge for two-part, double-wall plastic box. A spine-like projection extending along the rear of the base of the box terminates in hinge pins which fit into holes in the cover as in the prior art. In the novel box, the spine-like projection consists of two spaced spines, and another spine-like projection at the rear of the cover fits into the spacing between those spines to provide two additional hinge points.
Inventors
- 👤 Mark W. Weavers
- 👤 Anthony W. Konkler
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 13:27
CPC Classifications
G; G11; G11B; G11B23/00; G11B23/02; G11B23/023; G11B23/0233; B; B65; B65D; B65D43/00; B65D43/14; B65D43/16; B65D43/163; B65D43/164; B65D2251/00; B65D2251/10; B65D2251/1016
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
110 words
A two-part, double-wall plastic box having a hinge comprising upstanding spine means extending along the rear of one part of the box and terminating in a pair of hinge pins, each fitting into a hole in the other part of the box, characterized by a feature that: the spine means comprises at least two spaced spines, the spine-carrying part of the box is of substantially normal double-wall thickness at the spacing between the spines, a projection from said other part fits into the spacing between said spines, and the adjacent ends of the projection and spines have mating convex and concave surfaces which provide additional hinge points and lateral stability.
Claim 2
Dependent Claim
110 words
A two-part, double-wall plastic box having a hinge comprising upstanding spine means extending along the rear of one part of the box and terminating in a pair of hinge pins, each fitting into a hole in the other part of the box, characterized by a feature that: the spine means comprises at least two spaced spines, the spine-carrying part of the box is of substantially normal double-wall thickness at the spacing between the spines, a projection from said other part fits into the spacing between said spines, and the adjacent ends of the projection and spines have mating convex and concave surfaces which provide additional hinge points and lateral stability.
Claim 3
Dependent Claim
23 words
A plastic box as defined in claim 1 wherein there is an interference fit between the mating surfaces of the projection and spines.
Claim 4
Dependent Claim
21 words
A plastic box as defined in claims 1 or 2 wherein each of said convex and concave surfaces is approximately spherical.
Claim 5
Dependent Claim
20 words
A plastic box as defined in claim 3 wherein the convex surfaces are of smaller radii that the concave surfaces.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1983-07-08 | 1984-01-07 | 1984-07-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1987-07-08 | 1988-01-07 | 1988-07-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1991-07-08 | 1992-01-07 | 1992-07-08 | $7700.00 | Window Closed / Lapsed |