US4034135A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Rigid structure
Assignee: Individual
•
Filing: 1975-11-20
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Granted: 1977-07-05
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Expires: 1995-11-20
Abstract
Abstract A rigid structure is made up of two interengaging layers. One of the layers is of a generally corrugated form and has slots in the crests of the layer on one side. The second layer is made up of a series of laminae with slots in one side which fit into the slots in the first layer at an angle thereto and which lock the structure into a rigid unit.
Inventors
- 👤 Michael Edward Anthony Passmore
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 23:08
CPC Classifications
B; B32; B32B; B32B3/00; B32B3/26; B32B3/28; B65; B65D; B65D65/00; B65D65/38; B65D65/40; B65D65/403; E; E04; E04B; E04B9/00; E04B9/34; E04B9/345; E04C; E04C2/00; E04C2/30; E04C2/32; E04C2/42; E04C2/421; E04C2/422; E04C2/423; B32B2250/00; B32B2250/40; Y; Y10; Y10T; Y10T428/00; Y10T428/24; Y10T428/24273; Y10T428/24298; Y10T428/24314; Y10T428/24628; Y10T428/24669; Y10T428/24694; Y10T428/24711; Y10T428/24727
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
133 words
A rigid structure comprising a first layer of generally corrugated form and a second layer comprising a plurality of laminae arranged across the said corrugations of the first layer, slots being formed in one side of the corrugated form, the slots extending oppositely on opposite sides from crests of the form on the said one side of the first layer, similar slots formed in the laminae, the slots extending from a one edge of each laminae, the said slots in the laminae and the first layer being so disposed whereby the laminae can interengage with the first layer so as to enable the laminae to engage in the slots in the first layer to lock into the said slots of the corrugation form at an angle to the general plane of the structure.
Claim 2
Dependent Claim
133 words
A rigid structure comprising a first layer of generally corrugated form and a second layer comprising a plurality of laminae arranged across the said corrugations of the first layer, slots being formed in one side of the corrugated form, the slots extending oppositely on opposite sides from crests of the form on the said one side of the first layer, similar slots formed in the laminae, the slots extending from a one edge of each laminae, the said slots in the laminae and the first layer being so disposed whereby the laminae can interengage with the first layer so as to enable the laminae to engage in the slots in the first layer to lock into the said slots of the corrugation form at an angle to the general plane of the structure.
Claim 3
Dependent Claim
18 words
A rigid structure according to claim 1 in which the second layer is of a generally corrugated form.
Claim 4
Dependent Claim
27 words
A rigid structure according to claim 1 in which the first layer is made up from a plurality of separate crests of material arranged side by side.
Claim 5
Dependent Claim
41 words
A rigid structure according to claim 1 in which the crests of the corrugations of the first layer are of generally triangular cross section with flattened apices which lie in a plane parallel to the said general plane of the structure.
Claim 6
Dependent Claim
18 words
A rigid structure according to claim 1 in which the laminae of the second layer include fixing means.
Claim 7
Dependent Claim
39 words
A rigid structure according to claim 5 in which the fixing means comprises a part of each lamina bent out of the plane of the lamina and arranged to lie parallel to the said general plane of the structure.
Claim 8
Dependent Claim
22 words
A rigid structure according to claim 5 in which the fixing means includes separate members secured to the material of the layer.
Claim 9
Dependent Claim
18 words
A rigid structure according to claim 1 and including a support web of material secured to a layer.
Claim 10
Dependent Claim
19 words
A rigid structure according to claim 8 in which the web is wrapped around the whole of the structure.
Claim 11
Dependent Claim
22 words
A rigid structure according to claim 1 and including support members secured to the surfaces of the layers adjacent the slots thereof.
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) | 1980-07-04 | 1981-01-03 | 1981-07-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1984-07-04 | 1985-01-03 | 1985-07-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1988-07-04 | 1989-01-03 | 1989-07-05 | $7700.00 | Window Closed / Lapsed |