US3793794A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Stacked column
Assignee: Arlo Inc
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Filing: 1972-09-15
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Granted: 1974-02-26
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Expires: 1992-09-15
Abstract
Abstract A column comprised of a plurality of concrete-filled stacked tubes of increasingly smaller diameter, the tubes engaging each other in overlapping relationship and being secured by means of locking rings at the point of their engagement, prior to pumping the tube interiors with concrete. A modification of invention includes the positioning of longitudinally extending tension rods in the tubes on a tension and or compression side, so as to counteract anticipated load prior to pumping of concrete.
Inventors
- 👤 B Archer
- 👤 J Low
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 08:29
CPC Classifications
E; E04; E04H; E04H12/00; E04H12/34; E04H12/02; E04H12/12
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
153 words
A column comprised of at least two concrete filled stacked tubes of increasingly smaller diameter and including: A. a bottom tube having: i. an inner lip at its top periphery; ii. a plurality of longitudinally extending rods secured to stressed sides of the interior of said tube at the top thereof and extending parallel with respect to the periphery of said tube; B. a top tube having: i. an outer lip encircling its bottom periphery so as to complementally abut said inner lip of said bottom tube as said tubes are engaged; ii. a plurality of longitudinally extending rods secured to stressed sides of the interior of said top tube at the top thereof, said rods in said top tube extending from the top thereof to the bottom in parallel and overlapping relationship with respect to the rods in said bottom tube; and C. lock means securing said inner and outer lips together.
Claim 2
Dependent Claim
153 words
A column comprised of at least two concrete filled stacked tubes of increasingly smaller diameter and including: A. a bottom tube having: i. an inner lip at its top periphery; ii. a plurality of longitudinally extending rods secured to stressed sides of the interior of said tube at the top thereof and extending parallel with respect to the periphery of said tube; B. a top tube having: i. an outer lip encircling its bottom periphery so as to complementally abut said inner lip of said bottom tube as said tubes are engaged; ii. a plurality of longitudinally extending rods secured to stressed sides of the interior of said top tube at the top thereof, said rods in said top tube extending from the top thereof to the bottom in parallel and overlapping relationship with respect to the rods in said bottom tube; and C. lock means securing said inner and outer lips together.
Claim 3
Dependent Claim
19 words
A column comprised of at least three concrete filled stacked tubes of increasingly smaller diameter as in claim 1.
Claim 4
Dependent Claim
49 words
A column comprised of a plurality of concrete-filled stacked tubes as in claim 2, overlapping portions of said top tube and said bottom tube defining a peripheral annulus about said bottom of said top tube so as to admit concrete around the bottom interior and exterior of said tube.
Claim 5
Dependent Claim
148 words
A column comprised of at least two stacked tubes of increasinglY smaller diameter and including: A. a bottom tube having: i. an inner lip at its top periphery; ii. a plurality of longitudinally extending rods secured to a stressed side of the interior of said tube at the top thereof and extending parallel with respect to the periphery of said tube; B. a top tube having: i. an outer lip encircling its bottom periphery so as to complementally abut said inner lip of said bottom tube as said tubes are engaged; ii. a plurality of longitudinally extending tension rods secured to a stressed side of the interior of said top tube at the top thereof and extending from said top to the bottom in parallel and overlapping relationship with respect to the rods in said bottom tube; and C. lock means securing said inner and outer lips together.
Claim 6
Dependent Claim
148 words
A column comprised of at least two stacked tubes of increasinglY smaller diameter and including: A. a bottom tube having: i. an inner lip at its top periphery; ii. a plurality of longitudinally extending rods secured to a stressed side of the interior of said tube at the top thereof and extending parallel with respect to the periphery of said tube; B. a top tube having: i. an outer lip encircling its bottom periphery so as to complementally abut said inner lip of said bottom tube as said tubes are engaged; ii. a plurality of longitudinally extending tension rods secured to a stressed side of the interior of said top tube at the top thereof and extending from said top to the bottom in parallel and overlapping relationship with respect to the rods in said bottom tube; and C. lock means securing said inner and outer lips together.
References Cited (Backward Citations)
US1095197A
Cited
GB611907A
Cited
US3199300A
Cited
US3257764A
Cited
FR1360355A
Cited
US3514918A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1977-02-25 | 1977-08-27 | 1978-02-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-02-25 | 1981-08-27 | 1982-02-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-02-25 | 1985-08-27 | 1986-02-26 | $7700.00 | Window Closed / Lapsed |