US3942238A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method for reinforcing structures
Assignee: Individual
•
Filing: 1974-04-22
•
Granted: 1976-03-09
•
Expires: 1994-04-22
Abstract
Abstract A method of reinforcing structures by means of tensioned steel cables is disclosed. A hollow conduit or duct is positioned in the structure and secured therein and made a part thereof by pouring concrete in a form surrounding the conduit. A specified number of steel strands, wires or cables are inserted and pushed through the conduit one-by-one by a mechanical strand pusher. A nose guide is positioned on the end of each of the strands if required to enable them to pass easily through the conduit. When the required amount of strands are positioned in the conduit and the concrete has set to a predetermined strength, the strands are stressed thereby putting the structure under compression.
Inventors
- 👤 Jean Pierre Dore
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 06:22
CPC Classifications
E; E04; E04G; E04G21/00; E04G21/12; B; B28; B28B; B28B23/00; B28B23/02; B28B23/04; B28B23/046; Y; Y10; Y10T; Y10T29/00; Y10T29/49; Y10T29/49826; Y10T29/49838; Y10T29/49863; Y10T29/49874; Y10T29/53; Y10T29/53696
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
100 words
A method of inserting reinforcing strands into a conduit extending through a structure to be stressed and then placing the strands under tension in the conduit, comprising selectively pushing a plurality of separate strands one-by-one through the conduit forming a group of strands of variable number therein, whereby the number of strands pushed through the conduit may be varied from job to job depending on the amount of reinforcing material required to adequately stress the structure, tensioning the group of strands, and anchoring the group of strands to the structure in order to maintain the group of strands under tension.
Claim 2
Independent Claim
100 words
A method of inserting reinforcing strands into a conduit extending through a structure to be stressed and then placing the strands under tension in the conduit, comprising selectively pushing a plurality of separate strands one-by-one through the conduit forming a group of strands of variable number therein, whereby the number of strands pushed through the conduit may be varied from job to job depending on the amount of reinforcing material required to adequately stress the structure, tensioning the group of strands, and anchoring the group of strands to the structure in order to maintain the group of strands under tension.
Claim 3
Dependent Claim
23 words
The process of claim 1 wherein a guard means is positioned on each of the strands prior to being pushed through the conduit.
Claim 4
Dependent Claim
20 words
The process of claim 1 wherein the strands are pushed through the conduit by means of a mechanical strand pusher.
Claim 5
Dependent Claim
25 words
The process of claim 3 wherein the mechanical strand pusher has a plurality of pulley means being adjustable for engagement with each of the strands.
Claim 6
Independent Claim
100 words
A method of inserting reinforcing strands into a conduit extending through a structure to be stressed and then placing the strands under tension in the conduit, comprising selectively pushing a plurality of separate strands simultaneously through the conduit forming a group of strands of variable number therein, whereby the number of strands pushed through the conduit may be varied from job to job depending on the amount of reinforcing material required to adequately stress the structure, tensioning the plurality of strands, and anchoring the group of strands to the structure in order to maintain the plurality of strands under tension.
Claim 7
Independent Claim
100 words
A method of inserting reinforcing strands into a conduit extending through a structure to be stressed and then placing the strands under tension in the conduit, comprising selectively pushing a plurality of separate strands simultaneously through the conduit forming a group of strands of variable number therein, whereby the number of strands pushed through the conduit may be varied from job to job depending on the amount of reinforcing material required to adequately stress the structure, tensioning the plurality of strands, and anchoring the group of strands to the structure in order to maintain the plurality of strands under tension.
Claim 8
Dependent Claim
14 words
The process of claim 1 wherein the strands are continuously pushed through the conduit.
Claim 9
Dependent Claim
36 words
The process of claim 1 further comprising the step of guiding succeeding strands, as the succeeding strands are pushed through the conduit, along a strand already inserted through the conduit to prevent weaving of the strands.
Claim 10
Dependent Claim
24 words
The process of claim 1 further comprising the step of automatically terminating the pushing of the strands as the strands exit from the conduit.
Claim 11
Dependent Claim
14 words
The process of claim 5 wherein the strands are continuously pushed through the conduit.
Claim 12
Dependent Claim
24 words
The process of claim 5 further comprising the step of automatically terminating the pushing of the strands as the strands exit from the conduit.
References Cited (Backward Citations)
US2550898A
Cited
US2958126A
Cited
US3225499A
Cited
US3513532A
Cited
US3719982A
Cited
US3785617A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1979-03-09 | 1979-09-08 | 1980-03-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1983-03-09 | 1983-09-08 | 1984-03-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1987-03-09 | 1987-09-08 | 1988-03-09 | $7700.00 | Window Closed / Lapsed |