US3931997A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method for breaking concrete structures
Assignee: Asahi Kasei Corp
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Filing: 1975-05-28
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Granted: 1976-01-13
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Expires: 1995-05-28
Abstract
Abstract Concrete structures including horizontal structures such as slabs, sub-beams and main beams and vertical structures such as internal walls, external walls and columns are broken by a static load applied to the concrete structure by a loading member of a static loading means, which causes bending stress to build up in the concrete structure and finally brings about breakage of the structure. The static load may be applied by hydraulic means, preferably mounted on a movable vehicle.
Inventors
- 👤 Akira Enami
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 09:48
CPC Classifications
E; E04; E04G; E04G23/00; E04G23/08
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
120 words
A method of breaking a two sided concrete structure having reinforcing members designed to withstand stress from a first side and characterized by having adjacent to the second side of said two sided structure an independent concrete structure comprising placing a hydraulic jack between said two adjacent concrete structures with one end of said jack having a loading member placed in contact with said second side of said two sided concrete structure and placing the other end of said jack having a reaction force supporting means in engagement with said independent concrete structure, and applying hydraulic pressure to said hydraulic jack to apply a bending stress to said two sided concrete structure whereby said two sided concrete structure is broken.
Claim 2
Independent Claim
120 words
A method of breaking a two sided concrete structure having reinforcing members designed to withstand stress from a first side and characterized by having adjacent to the second side of said two sided structure an independent concrete structure comprising placing a hydraulic jack between said two adjacent concrete structures with one end of said jack having a loading member placed in contact with said second side of said two sided concrete structure and placing the other end of said jack having a reaction force supporting means in engagement with said independent concrete structure, and applying hydraulic pressure to said hydraulic jack to apply a bending stress to said two sided concrete structure whereby said two sided concrete structure is broken.
Claim 3
Independent Claim
112 words
A method of breaking a reinforced concrete building having concrete structures selected from the group consisting of horizontal slabs, sub-beams and main beams comprising standing on a floor a hydraulic pressure loading means having a loading member at its upper end, and a reaction force supporting member with a larger contact area than said loading member at its lower end, contacting said loading member to said concrete structure from the bottom for applying a static load by means of said hydraulic pressure loading means, and thereby breaking said concrete structure by generating the bending stress therein for minimizing the ultimate strength of said concrete structure to which said loading member is contacted.
Claim 4
Independent Claim
112 words
A method of breaking a reinforced concrete building having concrete structures selected from the group consisting of horizontal slabs, sub-beams and main beams comprising standing on a floor a hydraulic pressure loading means having a loading member at its upper end, and a reaction force supporting member with a larger contact area than said loading member at its lower end, contacting said loading member to said concrete structure from the bottom for applying a static load by means of said hydraulic pressure loading means, and thereby breaking said concrete structure by generating the bending stress therein for minimizing the ultimate strength of said concrete structure to which said loading member is contacted.
Claim 5
Dependent Claim
19 words
A method according to claim 2 wherein said hydraulic pressure loading means is mounted on a freely movable vehicle.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1979-01-12 | 1979-07-14 | 1980-01-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1983-01-12 | 1983-07-14 | 1984-01-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1987-01-12 | 1987-07-14 | 1988-01-13 | $7700.00 | Window Closed / Lapsed |