US4011705A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method for constructing a thin-shell concrete structure designed for lifting with hydraulic apparatus
Assignee: Individual
•
Filing: 1975-10-31
•
Granted: 1977-03-15
•
Expires: 1995-10-31
Abstract
Abstract A method for constructing a thin-shell concrete structure of round design comprising, pouring on soil of the main floor, applying reinforced concrete against a dome shaped liner of insulating material, and raising the resulting structure so as to allow a lower floor to be constructed.
Inventors
- 👤 Peter Martin Vanderklaauw
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 03:14
CPC Classifications
E; E04; E04B; E04B1/00; E04B1/35; E04B1/3511; E04B1/16; E04B1/166; E04B1/32; E04B2001/3217; E04B2001/3258; E04B2001/3264
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
170 words
A method of constructing a thin-shell concrete structure comprising the steps: a. preparing foundation pads at spaced zones about the perimeter of the structure to be erected; b forming a circular base for a concrete floor of sand, gravel or soil in the area bound by the foundation pads; c. shaping the surface of the circular base by revolving a screed about a point at the center of the circular base; d. placing vertical columns on each foundation pad; e. placing reinforcing steel on the screed circular base; f. pouring a concrete floor on the base including about the vertical columns; g. forming an insulating liner having circular side walls and a dome-shaped top; h. temporarily supporting the liner top from the concrete floor; i. forming a concrete coating on the external surface of the side walls of the insulating liner; j. forming a concrete coating on the external surface of the dome-shaped insulating liner; and k. removing the temporary supports for the liner top after the concrete is cured.
Claim 2
Independent Claim
170 words
A method of constructing a thin-shell concrete structure comprising the steps: a. preparing foundation pads at spaced zones about the perimeter of the structure to be erected; b forming a circular base for a concrete floor of sand, gravel or soil in the area bound by the foundation pads; c. shaping the surface of the circular base by revolving a screed about a point at the center of the circular base; d. placing vertical columns on each foundation pad; e. placing reinforcing steel on the screed circular base; f. pouring a concrete floor on the base including about the vertical columns; g. forming an insulating liner having circular side walls and a dome-shaped top; h. temporarily supporting the liner top from the concrete floor; i. forming a concrete coating on the external surface of the side walls of the insulating liner; j. forming a concrete coating on the external surface of the dome-shaped insulating liner; and k. removing the temporary supports for the liner top after the concrete is cured.
Claim 3
Dependent Claim
24 words
The method as defined in claim 1 wherein the insulating liner is produced by spraying or frothing an insulating material on a revolving form.
Claim 4
Dependent Claim
39 words
The method as defined in claim 1 wherein the insulating liner is produced by frothing or spraying an insulating material between a double-sided revolving form and a releasing agent is provided between the inner faces of the double-sided form.
Claim 5
Dependent Claim
15 words
The method as defined in claim 1 wherein the insulating liner comprises pre-cut assemblable panels.
Claim 6
Dependent Claim
37 words
The method defined in claim 1 including supporting a steel hoop about the upper end of the side walls of the structure prior to forming the concrete coating on the external surface of the domed-shaped insulating liner.
Claim 7
Dependent Claim
27 words
The method defined in claim 1 including installing a lifting mechanism about each of the vertical columns prior to pouring the concrete floor on the circular base.
Claim 8
Dependent Claim
20 words
The method defined in claim 1 including raising the cured concrete structure on each of the vertical columns one-story high.
Claim 9
Dependent Claim
27 words
The method defined in claim 7 wherein the lifting mechanism comprises a plurality of hydraulic jacks and the plurality of hydraulic jacks are interconnected into three groups.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1980-03-14 | 1980-09-13 | 1981-03-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1984-03-14 | 1984-09-13 | 1985-03-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1988-03-14 | 1988-09-13 | 1989-03-15 | $7700.00 | Window Closed / Lapsed |