US4700516A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Composite, pre-stressed structural member and method of forming same
Assignee: KEITH AND GROSSMAN LEASING Co
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Filing: 1985-01-02
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Granted: 1987-10-20
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Expires: 2005-01-02
Abstract
Abstract A composite, pre-stressed structural member comprised of concrete and a lower metal support member, and method for forming and pre-stressing the same. The metal support member and a concrete mold are connected for parallel deflection with the support member uppermost and shear-connectors extending into the mold. The connected mold and support member are supported for deflection and concrete is poured into the mold and allowed to harden. During hardening of the concrete the mold and support member are deflected by the weight of the concrete, mold and support member, pre-stressing the support member. Upon hardening of the concrete and inverting to a concrete-uppermost position, a composite, pre-stressed structural member is provided.
Inventors
- 👤 Stanley J. Grossman
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 20:28
CPC Classifications
E; E04; E04C; E04C3/00; E04C3/02; E04C3/29; E04C3/293; E04C3/294; B; B28; B28B; B28B19/00; B28B23/00; B28B23/02; B28B23/04; E01; E01D; E01D2/00; E01D2/02; E04B; E04B5/00; E04B5/16; E04B5/17; E04B5/23; E04B5/29; E01D2101/00; E01D2101/20; E01D2101/24; E01D2101/26; E01D2101/28; E01D2101/285
Claims Analysis
Total Claims: 21
Claim 1
Independent Claim
202 words
A composite pre-stressed structural member comprising: a lower support means; an upper hardened molded surface; a connector means for fixedly joining said lower support means and said upper molded surface in a pre-stressed relationship; and said upper molded surface and the pre-stressed relationship between said upper molded surface and said lower support means having the characteristics of being formed by: connecting said lower support means to the upper side of a mold so that deflection of the mold causes an approximately parallel deflection of the lower support means and such that said connector means extend downwardly into said mold; supporting said mold and said lower support means so that deflection of said mold and said lower support means can occur; filling said mold with a moldable material which hardens to form said hardened molded surface; said filling of the mold deflecting the mold by the weight of the moldable material such that the lower support means is placed in a stress condition during hardening of the moldable material; and after hardening of the moldable material, inverting said lower support means, said hardened molded surface and said connector means such that the lower support means is beneath and supports the hardened moldable material.
Claim 2
Dependent Claim
202 words
A composite pre-stressed structural member comprising: a lower support means; an upper hardened molded surface; a connector means for fixedly joining said lower support means and said upper molded surface in a pre-stressed relationship; and said upper molded surface and the pre-stressed relationship between said upper molded surface and said lower support means having the characteristics of being formed by: connecting said lower support means to the upper side of a mold so that deflection of the mold causes an approximately parallel deflection of the lower support means and such that said connector means extend downwardly into said mold; supporting said mold and said lower support means so that deflection of said mold and said lower support means can occur; filling said mold with a moldable material which hardens to form said hardened molded surface; said filling of the mold deflecting the mold by the weight of the moldable material such that the lower support means is placed in a stress condition during hardening of the moldable material; and after hardening of the moldable material, inverting said lower support means, said hardened molded surface and said connector means such that the lower support means is beneath and supports the hardened moldable material.
Claim 3
Dependent Claim
18 words
The composite, pre-stressed structural member of claim 1 wherein said lower support member comprises a flanged steel beam.
Claim 4
Dependent Claim
16 words
The composite, pre-stressed structural member of claim 1 wherein said moldable material comprises a cement mixture.
Claim 5
Dependent Claim
24 words
The composite, pre-stressed structural member of claim 1 wherein said connector means comprises a plurality of shear connectors extending from said lower support member.
Claim 6
Dependent Claim
20 words
The composite pre-stressed structural member of claim 1 wherein said lower support means comprises a pair of parallel steel beams.
Claim 7
Dependent Claim
93 words
A composite, pre-stressed structural member comprising: a molded upper surface formed of hardened concrete; and a lower metal support member extending beneath and connected by shear connection means to said molded upper surface for supporting loads placed upon said molded upper surface, said connection between said molded upper surface and said lower metal support having a shear stress load thereon formed by hardening said concrete about said shear connection means with said lower metal support member deflected by the weight of said concrete and said lower metal support in an inverted stress position.
Claim 8
Dependent Claim
93 words
A composite, pre-stressed structural member comprising: a molded upper surface formed of hardened concrete; and a lower metal support member extending beneath and connected by shear connection means to said molded upper surface for supporting loads placed upon said molded upper surface, said connection between said molded upper surface and said lower metal support having a shear stress load thereon formed by hardening said concrete about said shear connection means with said lower metal support member deflected by the weight of said concrete and said lower metal support in an inverted stress position.
Claim 9
Dependent Claim
15 words
The structural member of claim 6 wherein said metal support member is a steel beam.
Claim 10
Dependent Claim
14 words
The structural member of claim 7 wherein said steel beam is a flanged beam.
Claim 11
Dependent Claim
29 words
The structural member of claim 6 wherein said shear connecting means is characterized by a plurality of shear connectors attached to said support member and extending into said concrete.
Claim 12
Dependent Claim
95 words
A composite, pre-stressed structural member comprising: a molded upper surface formed of hardened concrete; and a lower metal support member extending beneath and connected by shear connection means to said molded upper surface for supporting loads placed upon said molded upper surface, said connection between said molded upper surface and said lower metal support having an evenly distributed shear stress load thereon formed by hardening said concrete about said shear connection means with said lower metal support member deflected by a weight of said concrete and said lower metal support in an inverted stress position.
Claim 13
Dependent Claim
95 words
A composite, pre-stressed structural member comprising: a molded upper surface formed of hardened concrete; and a lower metal support member extending beneath and connected by shear connection means to said molded upper surface for supporting loads placed upon said molded upper surface, said connection between said molded upper surface and said lower metal support having an evenly distributed shear stress load thereon formed by hardening said concrete about said shear connection means with said lower metal support member deflected by a weight of said concrete and said lower metal support in an inverted stress position.
Claim 14
Dependent Claim
14 words
The structural member of claim 10 wherein said support member is a flanged beam.
Claim 15
Dependent Claim
27 words
The structural member of claim 10 wherein said shear connection means is characterized by a shear connector attached to said support member and extending into said concrete.
Claim 16
Dependent Claim
77 words
A composite, pre-stressed structural member comprising: an upper support surface formed of a hardened moldable material; a lower support member extending beneath said upper surface for supporting loads placed on said upper surface; and shear connection means for connecting said support member to said upper surface; wherein, said support member has a pre-stress exerted thereon by deflection of said support member when in an inverted position by a weight thereof and a weight of said moldable material.
Claim 17
Dependent Claim
77 words
A composite, pre-stressed structural member comprising: an upper support surface formed of a hardened moldable material; a lower support member extending beneath said upper surface for supporting loads placed on said upper surface; and shear connection means for connecting said support member to said upper surface; wherein, said support member has a pre-stress exerted thereon by deflection of said support member when in an inverted position by a weight thereof and a weight of said moldable material.
Claim 18
Dependent Claim
12 words
The structural member of claim 13 wherein said moldable material is concrete.
Claim 19
Dependent Claim
14 words
The structural member of claim 13 wherein said support member is a flanged beam.
Claim 20
Dependent Claim
12 words
The support member of claim 15 wherein said flanged beam is steel.
Claim 21
Dependent Claim
28 words
The structural member of claim 13 wherein said shear connection means is characterized by a shear connector attached to said support member and extending into said moldable material.
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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) | 1990-10-19 | 1991-04-20 | 1991-10-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1994-10-19 | 1995-04-20 | 1995-10-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1998-10-19 | 1999-04-20 | 1999-10-20 | $7700.00 | Window Closed / Lapsed |