Patent US3782029A successfully refreshed from Google Patents.
US3782029A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Construction set and element thereof
Assignee: Individual
•
Filing: 1972-03-31
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Granted: 1974-01-01
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Expires: 1992-03-31
Abstract
Abstract A construction set comprises a plurality of skeletal tetrahedrons and interconnecting means therefor so that they can be assembled in a plurality of groups of different configuration and rotated relative to each other. The legs of the tetrahedrons have flange configurations for receiving correspondingly flanged resilient connectors.
Inventors
- 👤 E Bardot
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 17:24
CPC Classifications
A; A63; A63F; A63F9/00; A63F9/0073; Y; Y10; Y10S; Y10S52/00; Y10S52/10
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
94 words
In a construction set, a tetrahedron comprising six legs, each leg being interconnected at each end to two other legs, said legs being spaced apart intermediate their length, each side of the tetrahedron having a triangular opening therethrough bounded by three said legs, each leg having a part-circular recess midway of its length on an inner edge of each leg, and a connector member having one end engaged in one of said triangular openings and having a circular flange adjacent said one end and disposed in said part-circular recesses adjacent said one triangular opening.
Claim 2
Dependent Claim
94 words
In a construction set, a tetrahedron comprising six legs, each leg being interconnected at each end to two other legs, said legs being spaced apart intermediate their length, each side of the tetrahedron having a triangular opening therethrough bounded by three said legs, each leg having a part-circular recess midway of its length on an inner edge of each leg, and a connector member having one end engaged in one of said triangular openings and having a circular flange adjacent said one end and disposed in said part-circular recesses adjacent said one triangular opening.
Claim 3
Dependent Claim
26 words
A construction set as claimed in claim 1, and a pair of said tetrahedrons in assembled relationship disposed one at each end of said connector member.
Claim 4
Dependent Claim
26 words
A construction set as claimed in claim 2, said pair of tetrahedrons each having a triangular face against a triangular face of the other said tetrahedron.
Claim 5
Dependent Claim
27 words
A construction set as claimed in claim 2, said pair of tetrahedrons being spaced apart, said connector member bridging across the space between said pair of tetrahedrons.
Claim 6
Dependent Claim
24 words
A construction set as claimed in claim 1, there being three said part-circular recesses coaxial with each other on each side of said tetrahedron.
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) | 1976-12-31 | 1977-07-02 | 1978-01-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-12-31 | 1981-07-02 | 1982-01-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-12-31 | 1985-07-02 | 1986-01-01 | $7700.00 | Window Closed / Lapsed |