US4387546A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Structural column and method of manufacture
Assignee: Panasonic Electric Works Co Ltd
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Filing: 1980-06-30
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Granted: 1983-06-14
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Expires: 2000-06-30
Abstract
Abstract A structural column (10) for use in the assembly of a framework (12) for a building (14) includes an outer member (16) constructed from a plurality of very thin sheets of wood material laminated together, and an inner member (18) also constructed from a plurality of very thin sheets of wooden material laminated together. Outer member (16) is composed of two substantially identical, preformed halves (20) bonded together along their longitudinal marginal shoulder portions (22) to form a closed cross-sectional shape. Correspondingly inner member 18 is constructed from two substantially identical, preformed halves 30 bonded together along their longitudinal marginal shoulder portions (31) to form a closed cross-sectional shape snugly fitting within the hollow interior of outer member (16). The marginal shoulder portions (22) and (31) may be arcuate to form rounded corners with the marginal shoulder portion of the other half of the corresponding outer and inner members, or the shoulder portions may be planar and disposed diagonally to the adjacent sections of the outer and inner members to cooperatively form a continuous, planar, diagonal corner with the shoulder portion of the corresponding opposite outer or inner member.
Inventors
- 👤 Yukio Kurita
- 👤 Satoshi Nakagawa
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 11:33
CPC Classifications
E; E04; E04C; E04C3/00; E04C3/02; E04C3/12; E04C3/14; E04C3/18; E04C3/30; E04C3/36; Y; Y10; Y10T; Y10T156/00; Y10T156/10; Y10T156/1002; Y10T156/1039; Y10T156/1041; Y10T156/1043; Y10T156/1044; Y10T156/1046; Y10T156/1052; Y10T156/1062; Y10T156/1066; Y10T156/1075
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
232 words
A structural column, comprising: an outer member composed of a plurality of individual, thin wooden layers laminated together to form a hollow cross-sectional shape, said outer member including two substantially identical, preformed halves joined together to define a closed configuration, each half having formed, marginal shoulder portions terminating at diagonally disposed, longitudinal edges which abut closely against a matching, diagonally disposed edge of the corresponding formed marginal shoulder portion of the opposite outer member half to form a continuous corner joint; at least one inner member composed of a plurality of individual, thin wooden layers laminated together to form a hollow, cross-sectional shape corresponding to the cross sectional shape of said outer member to closely underlie said outer member, each of said inner members including two substantially identical, preformed halves joined together to form a closed configuration, each inner member half having formed marginal shoulder portions terminating at diagonally disposed, longitudinal edges which abut closely against a matching diagonally disposed edge of the corresponding formed marginal shoulder portion of the opposite inner member half to form a continuous corner joint; and a center core snugly occupying the hollow interior of said inner member, said core extending longitudinally through said inner member with the ends of said core terminating a short distance inwardly from each end of said inner member to define a longitudinally open socket within each end portion of said column.
Claim 2
Dependent Claim
232 words
A structural column, comprising: an outer member composed of a plurality of individual, thin wooden layers laminated together to form a hollow cross-sectional shape, said outer member including two substantially identical, preformed halves joined together to define a closed configuration, each half having formed, marginal shoulder portions terminating at diagonally disposed, longitudinal edges which abut closely against a matching, diagonally disposed edge of the corresponding formed marginal shoulder portion of the opposite outer member half to form a continuous corner joint; at least one inner member composed of a plurality of individual, thin wooden layers laminated together to form a hollow, cross-sectional shape corresponding to the cross sectional shape of said outer member to closely underlie said outer member, each of said inner members including two substantially identical, preformed halves joined together to form a closed configuration, each inner member half having formed marginal shoulder portions terminating at diagonally disposed, longitudinal edges which abut closely against a matching diagonally disposed edge of the corresponding formed marginal shoulder portion of the opposite inner member half to form a continuous corner joint; and a center core snugly occupying the hollow interior of said inner member, said core extending longitudinally through said inner member with the ends of said core terminating a short distance inwardly from each end of said inner member to define a longitudinally open socket within each end portion of said column.
Claim 3
Dependent Claim
26 words
The structural column according to claim 1, wherein said central core is formed from a singular, nonlaminated length of wooden material bonded to said inner member.
Claim 4
Dependent Claim
29 words
The structural column according to claim 1, wherein said central core is formed from at least two individual lengths of wooden material bonded together and to said inner member.
Claim 5
Dependent Claim
37 words
The structural column according to claim 1, wherein said central core is composed of a plurality of very thin strips of wooden material laminated together to form a unitary structure which is bonded to said inner member.
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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) | 1986-06-13 | 1986-12-13 | 1987-06-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1990-06-13 | 1990-12-13 | 1991-06-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1994-06-13 | 1994-12-13 | 1995-06-14 | $7700.00 | Window Closed / Lapsed |