Patent US4285179A successfully refreshed from Google Patents.
US4285179A
Expired / Lapsed
US
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Plate shaped prefabricated guilding element and a process for the production of walls by using these elements
Assignee: Individual
•
Filing: 1979-11-01
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Granted: 1981-08-25
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Expires: 1999-11-01
Abstract
Abstract A substantially crack-free load-bearing wall of prefabricated building elements and method of producing the same comprising a plurality of pre-fabricated building elements made of light-weight concrete each having a modulus of elasticity less than 8,000 kg/cm 2 . The elements are substantially rectangular in shape and have longitudinal grooves on their respective longitudinal edges. The elements are first shrunk by steam hardening or by storage for a pre-selected period of time and then arranged side by side with their lateral side edges in abutting relationship so that the grooves of the respective adjacent elements form vertical channels therebetween. The channels are filled with heavy concrete which provides a tensile-resistant bond between the elements and which also forms pillars which carry the major part of any load applied to the wall.
Inventors
- 👤 Johann Goidinger
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 12:31
CPC Classifications
E; E04; E04C; E04C2/00; E04C2/02; E04C2/04; E04C2/049
Claims Analysis
Total Claims: 24
Claim 1
Independent Claim
157 words
A method of constructing a substantially crack-free load-bearing wall, comprising: providing a plurality of substantially rectangular pre-fabricated building elements, each of light-weight concrete having a modulus of elasticity of less than 8000 kg/cm 2 which have been previously shrunk by at least one of, steam hardening and storage for a selected period of time each of the elements having a lengthwise groove formed in each longitudinal side edges thereof; arranging the elements side-by-side so that the longitudinal side edges of adjacent are in abutting relationship and said grooves form vertical channels between adjacent elements; and subsequently filling the so formed channels with heavy concrete to provide a tensile-resistant bond between adjacent elements and to form pillars which carry the major part of a load applied to the wall; said previous shrinkage of said elements being such that the residual shrinkage of the elements is accommodated by creep occurring in the elements and by the elastic expansion thereof.
Claim 2
Independent Claim
157 words
A method of constructing a substantially crack-free load-bearing wall, comprising: providing a plurality of substantially rectangular pre-fabricated building elements, each of light-weight concrete having a modulus of elasticity of less than 8000 kg/cm 2 which have been previously shrunk by at least one of, steam hardening and storage for a selected period of time each of the elements having a lengthwise groove formed in each longitudinal side edges thereof; arranging the elements side-by-side so that the longitudinal side edges of adjacent are in abutting relationship and said grooves form vertical channels between adjacent elements; and subsequently filling the so formed channels with heavy concrete to provide a tensile-resistant bond between adjacent elements and to form pillars which carry the major part of a load applied to the wall; said previous shrinkage of said elements being such that the residual shrinkage of the elements is accommodated by creep occurring in the elements and by the elastic expansion thereof.
Claim 3
Dependent Claim
45 words
A method according to claim 1, wherein said previous shrinkage caused by at least one of steam hardening and storage amounts, to at least 70% of the total amount of shrinkage which would occur over a period sufficiently long for the shrinkage substantially to cease.
Claim 4
Dependent Claim
13 words
A method according to claim 1, wherein said light-weight concrete includes expanded polystyrene.
Claim 5
Dependent Claim
20 words
A method according to claim 1, wherein the modulus of elastic of the light-weight concrete is 4000 kg/cm 2 .
Claim 6
Dependent Claim
17 words
A method according to claim 1, wherein the pre-fabricated elements are formed with longitudinal channels extending therethrough.
Claim 7
Dependent Claim
35 words
A method according to claim 5, wherein at least some of the longitudinal channels extending through the building elements are filled with heavy concrete after arranging the elements side-by-side to form additional load carrying pillars.
Claim 8
Dependent Claim
26 words
A method according to claim 1, wherein the surface of the grooves of the building elements are activated to increase their adhesion with the heavy concrete.
Claim 9
Dependent Claim
14 words
A method according to claim 7, wherein the building elements are activated by roughening.
Claim 10
Dependent Claim
18 words
A method according to claim 7, wherein the building elements are activated by applying a layer of adhesive.
Claim 11
Dependent Claim
141 words
A substantially crack-free load-bearing wall, comprising a plurality of substantially rectangular pre-fabricated building elements of light-weight concrete having a modulus of elasticity less than 8000 kg/cm 2 which have been previously shrunk by steam-hardening or storage, said elements having a lengthwise groove formed in each of their longitudinal side edges, said elements further being arranged side-by-side so that the longitudinal side edges of adjacent elements are in abutting relationship and said grooves form vertical channels between adjacent elements, said channels being filled with heavy concrete to provide a tensile-resistant bond between adjacent elements and to form pillars in said channels which carry the major part of a load applied to said wall, said previous shrinkage of said pre-fabricated elements being such that the residual shrinkage of the elements is accommodated by creep occurring in the elements and by elastic expansion thereof.
Claim 12
Dependent Claim
141 words
A substantially crack-free load-bearing wall, comprising a plurality of substantially rectangular pre-fabricated building elements of light-weight concrete having a modulus of elasticity less than 8000 kg/cm 2 which have been previously shrunk by steam-hardening or storage, said elements having a lengthwise groove formed in each of their longitudinal side edges, said elements further being arranged side-by-side so that the longitudinal side edges of adjacent elements are in abutting relationship and said grooves form vertical channels between adjacent elements, said channels being filled with heavy concrete to provide a tensile-resistant bond between adjacent elements and to form pillars in said channels which carry the major part of a load applied to said wall, said previous shrinkage of said pre-fabricated elements being such that the residual shrinkage of the elements is accommodated by creep occurring in the elements and by elastic expansion thereof.
Claim 13
Dependent Claim
44 words
A wall according to claim 10, wherein said previous shrinkage of the pre-fabricated elements caused by steam-hardening or storage amounts to at least 70% of the total amount of shrinkage which would occur over a period sufficiently long for the shrinkage substantially to cease.
Claim 14
Dependent Claim
13 words
A wall according to claim 10, wherein said light-weight concrete includes expanded polystyrene.
Claim 15
Dependent Claim
20 words
A wall according to claim 10, wherein the modulus of elasticity of the light-weight concrete is 4000 kg/cm 2 .
Claim 16
Dependent Claim
42 words
A wall according to claim 13, wherein the light-weight concrete has the following approximate composition per cubic meter: ______________________________________
1100 l foam polystyrene particles
340 kg cement
40 kg fine sand
130 l water
0.135 kg adhesive material
0.365 kg hardener
______________________________________
Claim 17
Dependent Claim
17 words
A wall according to claim 10, wherein the pre-fabricated elements are provided with longitudinal channels extending therethrough.
Claim 18
Dependent Claim
30 words
A wall according to claim 15, wherein at least some of the longitudinal channels extending through the building elements are filled with heavy concrete to provide additional load-carrying concrete pillars.
Claim 19
Dependent Claim
23 words
A wall according to claim 10, wherein each building element is provided with a rim projecting vertically beyond an upper edge surface thereof.
Claim 20
Dependent Claim
23 words
A wall according to claim 10, wherein the surfaces of the grooves are bond activated to increase their adhesion with the heavy concrete.
Claim 21
Dependent Claim
11 words
A wall according to claim 18, wherein said surfaces are roughened.
Claim 22
Dependent Claim
22 words
A wall according to claim 18, wherein said surfaces are coated with an adhesion layer to improve adhesion to the heavy concrete.
Claim 23
Dependent Claim
29 words
A wall according to claim 15, wherein the longitudinal channels extending through the wall are arranged asymmetrically with respect to a dividing plane of symmetry of the building elements.
Claim 24
Dependent Claim
29 words
A wall according to claim 10, wherein said grooves on each of said elements are arranged asymmetrically with respect to a dividing plane of symmetry of the building elements.
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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) | 1984-08-24 | 1985-02-23 | 1985-08-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1988-08-24 | 1989-02-23 | 1989-08-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1992-08-24 | 1993-02-23 | 1993-08-25 | $7700.00 | Window Closed / Lapsed |