US3848377A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Mat foundation
Assignee: Individual
•
Filing: 1973-04-18
•
Granted: 1974-11-19
•
Expires: 1993-04-18
Abstract
Abstract Mat foundation for use in construction work in a pit excavation in the ground, a foundation lattice framework is provided by juxtaposing concrete lattice frames on the bottom of the excavation. Foundation blocks are placed in alignment on the foundation lattice framework so as to be astride adjacent lattice frames, adjacent joints of the foundation blocks being so disposed as to be located over an open space of the foundation lattice framework. There, joints are connected and secured to each other by metal implements, a reinforcing bar being located on connecting metal implements. The lowermost ends of the reinforcing bar extends to the open space of the foundation lattice framework, which open space of the foundation blocks are filled with concrete.
Inventors
- 👤 M Mori
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 08:04
CPC Classifications
E; E04; E04B; E04B1/00; E04B1/02; E04B1/04; E04B1/043; E04B1/046; E02; E02D; E02D27/00; E02D27/01; E02D27/02
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
171 words
A mat foundation comprising in combination a foundation lattice framework of lattice frames juxtaposed on the bottom of a pit excavation, said lattice frames having transverse bars formed in the shape of an inverted trapezoid; vertically elongated foundation blocks having lateral joining sections aligned on the foundation lattice framework, each of said foundation blocks being so disposed as to be astride adjacent lattice frames; adjacent joining section of the foundation blocks being so disposed as to be located above open spaces of the foundation lattice framework; notches on the joining sections to facilitate the securing of the joining members; metal tongue, groove and pin joint members connecting said joining section to each other, said tongue in one joining section entering the groove of another joining section to be held by said pin; a vertical reinforcing bar fixed to the joining members, the lowermost ends of the reinforcing bar being inwardly bent and extending into open space of the foundation lattice framework, the open space and the joints being filled with concrete.
Claim 2
Dependent Claim
171 words
A mat foundation comprising in combination a foundation lattice framework of lattice frames juxtaposed on the bottom of a pit excavation, said lattice frames having transverse bars formed in the shape of an inverted trapezoid; vertically elongated foundation blocks having lateral joining sections aligned on the foundation lattice framework, each of said foundation blocks being so disposed as to be astride adjacent lattice frames; adjacent joining section of the foundation blocks being so disposed as to be located above open spaces of the foundation lattice framework; notches on the joining sections to facilitate the securing of the joining members; metal tongue, groove and pin joint members connecting said joining section to each other, said tongue in one joining section entering the groove of another joining section to be held by said pin; a vertical reinforcing bar fixed to the joining members, the lowermost ends of the reinforcing bar being inwardly bent and extending into open space of the foundation lattice framework, the open space and the joints being filled with concrete.
Claim 3
Dependent Claim
41 words
A mat foundation as defined in claim 1 wherein the concrete of the foundation lattice framework is of the same quality as the concrete poured into the open space of said foundation lattice framework and the joints of the foundation blocks.
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) | 1977-11-18 | 1978-05-20 | 1978-11-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-11-18 | 1982-05-20 | 1982-11-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-11-18 | 1986-05-20 | 1986-11-19 | $7700.00 | Window Closed / Lapsed |