US3857212A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Hub joints for geodesic domes
Assignee: Individual
•
Filing: 1974-03-18
•
Granted: 1974-12-31
•
Expires: 1994-03-18
Abstract
Abstract A hub joint for geodesic domes consisting of a circular metal hub plate with holes in its outer circumference to which are bolted metal T section struts with their vertical flanges removed at each end. The horizontal flanges at the ends of the struts are tapered so as to permit stable side to side nesting of the struts extending radially from the hub plate.
Inventors
- 👤 H Barnett
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 09:51
CPC Classifications
E; E04; E04B; E04B1/00; E04B1/32; E04B1/3211; E04B2001/3235; E04B2001/3241; E04B2001/3247; E04B2001/3252; E04B2001/3294; Y; Y10; Y10T; Y10T403/00; Y10T403/34; Y10T403/341; Y10T403/342; Y10T403/343
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
191 words
A Hub joint structure for geodesic domes including a foundation base, generally flat circular hub plates with each plate having first apertures therein adjacent its circumference, and second apertures therein spaced inwardly of said first apertures, T-section strut members attachable at opposing ends to said hub plates with each member having an outwardly extending vertical flange and a transverse horizontal flange, a portion of said vertical flange being removed at each end for a distance slightly greater than each hub plate radius to provide extended horizontal flanges, said horizontal flanges being angled away from said vertical flanges so as to flatly engage the outer surfaces of said hub plates and being tapered so that said strut ends abut and nest on said plates, and spaced apertures in said extended horizontal flanges aligned with said first and Second apertures in said hub plates for receiving mounting elements therethrough for radially connecting said strut members to said hub plates, whereby the first connection of said hub plates to said foundation base and subsequent successive interconnection of said strut members and hub plates enables the upward formation and erection of a completed dome framework.
Claim 2
Dependent Claim
191 words
A Hub joint structure for geodesic domes including a foundation base, generally flat circular hub plates with each plate having first apertures therein adjacent its circumference, and second apertures therein spaced inwardly of said first apertures, T-section strut members attachable at opposing ends to said hub plates with each member having an outwardly extending vertical flange and a transverse horizontal flange, a portion of said vertical flange being removed at each end for a distance slightly greater than each hub plate radius to provide extended horizontal flanges, said horizontal flanges being angled away from said vertical flanges so as to flatly engage the outer surfaces of said hub plates and being tapered so that said strut ends abut and nest on said plates, and spaced apertures in said extended horizontal flanges aligned with said first and Second apertures in said hub plates for receiving mounting elements therethrough for radially connecting said strut members to said hub plates, whereby the first connection of said hub plates to said foundation base and subsequent successive interconnection of said strut members and hub plates enables the upward formation and erection of a completed dome framework.
Claim 3
Dependent Claim
45 words
In a hub joint structure, as claimed in claim 1, wherein triangular panels are attached to said strut members in the area defined by adjacent strut members, the edges of said panels resting on the L-shaped ledge formed by one-half of each T-section strut member.
Claim 4
Dependent Claim
31 words
In a hub joint structure, as claimed in claim 1, wherein panel retaining strips are attached to a triangular panel on either side of and extending across a corresponding T-strut member.
Claim 5
Dependent Claim
31 words
In a hub joint structure, as claimed in claim 1, wherein panel sealing strips are attached to and cover the area formed between adjacent panels mounted on a T-section strut member.
Claim 6
Dependent Claim
35 words
In a hub joint structure, as claimed in claim 1, wherein a sealing cap is attached to and covers said triangular panels and said sealing strips at their point of intersection over said hub plate.
Claim 7
Dependent Claim
32 words
In a hub joint structure as claimed in claim 1, wherein the areas between the edges of said triangular panels and said L-shaped ledges of said strut members are filled with caulking.
References Cited (Backward Citations)
US2557660A
Cited
US2964147A
Cited
US3026651A
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GB900902A
Cited
US3270478A
Cited
US3137371A
Cited
US3486278A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1977-12-30 | 1978-07-01 | 1978-12-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-12-30 | 1982-07-01 | 1982-12-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-12-30 | 1986-07-01 | 1986-12-31 | $7700.00 | Window Closed / Lapsed |