US4216255A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Structural element for three-dimensional objects, e.g. furniture
Assignee: Individual
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Filing: 1978-05-31
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Granted: 1980-08-05
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Expires: 1998-05-31
Abstract
Abstract This invention relates to a structural element for three-dimensional objects, e.g. furniture, said element having the shape of a longitudinal section, such that standard sections, mutually only differing in length, may be used for assembling the object. The section thereto comprises at least two longitudinal legs which include an angle, of which each leg is chamfered at its joining end with another of said elements at a predetermined angle with the longitudinal axis of the leg, perpendicular to the plane of that leg, such that the chamfering angles with the longitudinal axis of two legs of two sections to be joined to each other, which legs are in the same plane after the connection of the sections, are mutually equal, in which each leg of a section has at least one tenon projection and the element to be joined thereto having at least one corresponding mortise for receiving said tenon projection. The construction achieved by said sections is rigid without the use of additional fastening means.
Inventors
- 👤 Robert J. A. B. Lever
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 16:07
CPC Classifications
F; F16; F16B; F16B12/00; F16B12/44; F16B12/46; F16B12/04; F16B2012/043; F16B2012/463; F16B2200/00; F16B2200/65; Y; Y10; Y10T; Y10T403/00; Y10T403/46; Y10T403/4602; Y10T428/00; Y10T428/19
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
262 words
A structural element for erecting, with one or more similarly formed elements, three dimensional objects comprising an elongated member having at least two longitudinal planar legs, associated pairs of said legs being joined along one longitudinal edge angularly to each other to define inner and outer surfaces with respect to the angle so formed, each of the associated legs, at at least one common end, being formed with inner and outer end walls adjacent the inner and outer surfaces, respectively, said inner and outer end walls being chamfered from the joined longitudinal edge outwardly to the opposite longitudinal edge at a predetermined angle with the longitudinal axis and having a tenon projection and a corresponding mortise, the tenon and mortise of one leg of the associated pair being disposed oppositely to those of the other leg of the associated pair with respect to the inner and outer walls such that in one leg the mortise lies adjacent the outer end wall and the tenon lies adjacent the inner end wall and in the other leg the mortise lies adjacent the inner end wall and the tenon lies adjacent the outer end wall, the tenon of each one of the associated legs being chamfered respectively at said predetermined angle so as to lie in the plane of the end walls of the other of the associated legs whereby on joining at least two of said elements the tenons of one leg of one element fit within the mortise of one leg of the other element and the chamfered end walls abut each other.
Claim 2
Dependent Claim
262 words
A structural element for erecting, with one or more similarly formed elements, three dimensional objects comprising an elongated member having at least two longitudinal planar legs, associated pairs of said legs being joined along one longitudinal edge angularly to each other to define inner and outer surfaces with respect to the angle so formed, each of the associated legs, at at least one common end, being formed with inner and outer end walls adjacent the inner and outer surfaces, respectively, said inner and outer end walls being chamfered from the joined longitudinal edge outwardly to the opposite longitudinal edge at a predetermined angle with the longitudinal axis and having a tenon projection and a corresponding mortise, the tenon and mortise of one leg of the associated pair being disposed oppositely to those of the other leg of the associated pair with respect to the inner and outer walls such that in one leg the mortise lies adjacent the outer end wall and the tenon lies adjacent the inner end wall and in the other leg the mortise lies adjacent the inner end wall and the tenon lies adjacent the outer end wall, the tenon of each one of the associated legs being chamfered respectively at said predetermined angle so as to lie in the plane of the end walls of the other of the associated legs whereby on joining at least two of said elements the tenons of one leg of one element fit within the mortise of one leg of the other element and the chamfered end walls abut each other.
Claim 3
Dependent Claim
16 words
The structural element according to claim 1, wherein said predetermined angle is equal to 45 degrees.
Claim 4
Dependent Claim
17 words
The structural element according to claim 1, wherein said tenon and mortise have a common side wall.
Claim 5
Dependent Claim
15 words
The structural element according to claim 1, wherein said legs are perpendicular to each other.
Claim 6
Dependent Claim
20 words
The structural element according to claim 4, wherein said legs form a corner section at right angles to each other.
Claim 7
Dependent Claim
17 words
The structural element according to claim 1, wherein said elongated member comprises legs formed T-shaped in cross-section.
Claim 8
Dependent Claim
19 words
The structural element according to claim 1 wherein said elongated member comprises four legs arranged in a cross-shaped section.
Claim 9
Dependent Claim
19 words
The structural element according to claim 1, wherein each leg is formed with two tenon projections and mortices, respectively.
Claim 10
Dependent Claim
20 words
The structural element according to claim 1, wherein the tenons terminate short of the longitudinal extent of the respective legs.
Claim 11
Dependent Claim
31 words
The structural element according to claim 9, wherein the tenon of one leg terminates shorter than the tenon of the other leg with respect to the longitudinal extent of the legs.
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) | 1983-08-05 | 1984-02-04 | 1984-08-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1987-08-05 | 1988-02-04 | 1988-08-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1991-08-05 | 1992-02-04 | 1992-08-05 | $7700.00 | Window Closed / Lapsed |