Patent US3816660A successfully refreshed from Google Patents.
Patent US3629901A successfully refreshed from Google Patents.
US3629901A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Hinges
Assignee: Lenox Werk Emil Liebler and Co
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Filing: 1969-04-29
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Granted: 1971-12-28
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Expires: 1989-04-29
Abstract
Abstract A one-piece hinge formed of plastic material, movable about an axis from a closed and open position is disclosed, the hinge including two hinge plates interconnected by a web which lies in one axis, at least one slit arranged at right angles to the axis separating the web into two or more hung strips, one of the strips being grooved at the position of the axis, another hinge strip acting as a tension spring to bias the hinge into its closed and open positions also including a spring portion thereof having an undulating from in both the closed and open positions and displaceable about two additional axes parallel to but at points offset from the first axis.
Inventors
- 👤 Johann Alois Wolf
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 21:03
CPC Classifications
E; E05; E05D; E05D1/00; E05D1/02
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
164 words
A one-piece hinge formed of plastic material, and moveable about a first axis between closed and open position, comprising: two hinge plates interconnected by a web in which lies the first axis, one or more slits arranged generally at right angles to the first axis and separating said web into at least two hinge strips, one of said hinge strips being grooved at the position of said first axis, the other of said hinge strips being adapted to function as a tension spring to bias the hinge into its closed, and open, positions and including a spring portion displaceable about two second axis parallel to, but at points offset from, said first axis, said spring portion having at least one section which is extensible longitudinally as the hinge plates are swung from their closed position to their open position, which has an undulating form in both the closed and open positions such that tension is maintained in a direction longitudinal to said spring portion.
Claim 2
Dependent Claim
164 words
A one-piece hinge formed of plastic material, and moveable about a first axis between closed and open position, comprising: two hinge plates interconnected by a web in which lies the first axis, one or more slits arranged generally at right angles to the first axis and separating said web into at least two hinge strips, one of said hinge strips being grooved at the position of said first axis, the other of said hinge strips being adapted to function as a tension spring to bias the hinge into its closed, and open, positions and including a spring portion displaceable about two second axis parallel to, but at points offset from, said first axis, said spring portion having at least one section which is extensible longitudinally as the hinge plates are swung from their closed position to their open position, which has an undulating form in both the closed and open positions such that tension is maintained in a direction longitudinal to said spring portion.
Claim 3
Dependent Claim
22 words
A hinge as in claim 1 wherein said spring portion has a thickened section intermediate two other sections of comparatively reduced thickness.
Claim 4
Dependent Claim
24 words
A hinge as in claim 2 wherein said thickened section is positioned centrally between the two other sections, which both have an undulating form.
Claim 5
Dependent Claim
21 words
A hinge as claimed in claim 1 in which the spring portion has the overall form of a capital letter omega
Claim 6
Dependent Claim
24 words
A hinge as claimed claim 1 in which the distances separating the attachment points between the hinge strip from the hinge axis are different.
Claim 7
Dependent Claim
35 words
A hinge as claimed in claim 1 in which the hinge axis and the attachment points lie in the median common plane of the hinge plates when the hinge is in its metastable intermediate position.
Claim 8
Dependent Claim
44 words
A hinge as claimed in any of claim 1, in which both the hinge axis and the attachment points lie outside the median common plane of the hinge plates and on respectively opposite sides thereof when the hinge is in its metastable intermediate position.
Claim 9
Dependent Claim
24 words
A hinge as claimed in claim 1, comprising a plurality of said one and said other hinge strips, arranged alternately along the hinge axis.
Claim 10
Dependent Claim
115 words
A one-piece hinge formed of inherently flexible, resilient plastic material, said hinge comprising: two relatively thick and inflexible hinge plates, at least one first hinge strip connecting said plates and having a groove formed therein to define a hinge axis about which said plates are rotatable, and at least one second hinge strip longitudinally displaced along said hinge axis from said first hinge strip and also connected between said plates but at offset connection points offset from said hinge axis, said second hinge strip including at least one undulating springlike section which provides a tension force between said offset connection points to bias said hinge plates to one of its open and closed stable positions.
Claim 11
Dependent Claim
115 words
A one-piece hinge formed of inherently flexible, resilient plastic material, said hinge comprising: two relatively thick and inflexible hinge plates, at least one first hinge strip connecting said plates and having a groove formed therein to define a hinge axis about which said plates are rotatable, and at least one second hinge strip longitudinally displaced along said hinge axis from said first hinge strip and also connected between said plates but at offset connection points offset from said hinge axis, said second hinge strip including at least one undulating springlike section which provides a tension force between said offset connection points to bias said hinge plates to one of its open and closed stable positions.
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) | 1974-12-27 | 1975-06-28 | 1975-12-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-12-27 | 1979-06-28 | 1979-12-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-12-27 | 1983-06-28 | 1983-12-28 | $7700.00 | Window Closed / Lapsed |