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US4493177A Expired / Lapsed US ⏱️ 0.0 years remaining

Composite, pre-stressed structural member and method of forming same

Assignee: KEITH & GROSSMANN LEASING COMPANY A OK PARTNERSHIP CONSISTING OF STANLEY J GROSSMAN AND GUY N KEITH
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Filing: 1981-11-25
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Granted: 1985-01-15
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Expires: 2001-11-25
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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 20:30
CPC Classifications
E; E01; E01D; E01D2/00; E01D2/02; B; B28; B28B; B28B19/00; B28B23/00; B28B23/02; B28B23/04; E04; E04B; E04B5/00; E04B5/16; E04B5/17; E04B5/23; E04B5/29; E04C; E04C3/00; E04C3/02; E04C3/29; E04C3/293; E04C3/294; E01D2101/00; E01D2101/20; E01D2101/24; E01D2101/26; E01D2101/28; E01D2101/285

Claims Analysis

Total Claims: 12
Claim 1
Independent Claim 133 words
A method of forming a composite, pre-stressed structural member of the type having an upper molded surface supported by a lower support member comprising: connecting a lower support member to the upper side of a mold so that deflection of the mold causes deflection of the support member and such that support member connector means extend downwardly into said mold; supporting the mold and lower support member so that deflection of the mold and lower support member can occur; filling the mold with a moldable material which hardens to form a composite structural member with said lower support member; and deflecting the mold during hardening of the moldable material such that the support memberr is placed in a stressed condition to form a composite, pre-stressed structural member upon hardening of the moldable material.
Claim 2
Independent Claim 133 words
A method of forming a composite, pre-stressed structural member of the type having an upper molded surface supported by a lower support member comprising: connecting a lower support member to the upper side of a mold so that deflection of the mold causes deflection of the support member and such that support member connector means extend downwardly into said mold; supporting the mold and lower support member so that deflection of the mold and lower support member can occur; filling the mold with a moldable material which hardens to form a composite structural member with said lower support member; and deflecting the mold during hardening of the moldable material such that the support memberr is placed in a stressed condition to form a composite, pre-stressed structural member upon hardening of the moldable material.
Claim 3
Dependent Claim 11 words
The method of claim 1, wherein said moldable material comprises concrete.
Claim 4
Dependent Claim 14 words
The method of claim 2, wherein said lower support member comprises a steel beam.
Claim 5
Dependent Claim 15 words
The method of claim 2, wherein said lower support member comprises a flanged steel beam.
Claim 6
Dependent Claim 37 words
The method of claim 1, which further comprises the step of: after hardening of the moldable material, inverting the composite, pre-stressed structural member such that the lower support member is beneath and supports the hardened moldable material.
Claim 7
Dependent Claim 39 words
The method of claim 5, wherein said inverting step comprises raising one side of said composite, pre-stressed structural member so that it hangs free and then lowering said raised side so that said composite, pre-stressed structural member is inverted.
Claim 8
Dependent Claim 43 words
The method of claim 5, which further comprises the step of: utilizing said composite, pre-stressed structural member in a structure such that a stress is placed on said lower support member opposite the stress placed on said support member in said deflecting step.
Claim 9
Dependent Claim 27 words
The method of claim 1, wherein said deflecting step is at least partially performed by said filling step; the weight of said moldable material deflecting said mold.
Claim 10
Dependent Claim 23 words
The method of claim 1, wherein said supporting step comprises supporting said mold on opposite ends so that downward deflection can occur therebetween.
Claim 11
Dependent Claim 37 words
The method of claim 8, wherein said connecting step comprises extending about said mold and said lower support member a plurality of rigid holding means for preventing said lower support member from moving away from said mold.
Claim 12
Dependent Claim 32 words
The method of claim 10, wherein said connecting step further comprises spacing said mold from said lower support member by rigid spacing means extending between said mold and said lower support member.

References Cited (Backward Citations)

USRE22569E Cited
US371843A Cited
US619769A Cited
US22569A Cited
DE1066006B Cited
CA632441A Cited
CA704841A Cited
US2725612A Cited
CA536672A Cited
US684258A Cited
US704933A Cited
US830494A Cited
US849760A Cited
US858502A Cited
US865490A Cited
US974658A Cited
US1078835A Cited
US1126853A Cited
US1335609A Cited
FR516225A Cited
GB215296A Cited
US1600514A Cited
US1690361A Cited
US1568596A Cited
US1684663A Cited
US1671946A Cited
US1567245A Cited
US1657566A Cited
US1640983A Cited
US1728265A Cited
US1652056A Cited
US1715497A Cited
US1804132A Cited
US2080074A Cited
US1836197A Cited
US1940401A Cited
GB382610A Cited
US2096629A Cited
US2028169A Cited
US2039398A Cited
US2229618A Cited
US2153741A Cited
US2299070A Cited
US2299111A Cited
US2299072A Cited
US2382138A Cited
US2382139A Cited
US2373072A Cited
US2340176A Cited
US2319105A Cited
US2413990A Cited
US2645115A Cited
US2558946A Cited
US2415240A Cited
US2601910A Cited
US2696729A Cited
US2510958A Cited
US2505342A Cited
FR1001295A Cited
US2465871A Cited
US2517701A Cited
US2596052A Cited
US2660049A Cited
DE849606C Cited
US2683915A Cited
US2611944A Cited
FR1042877A Cited
AT179887B Cited
FR1020271A Cited
US2655196A Cited
CA559136A Cited
DE960360C Cited
US2730797A Cited
US2729850A Cited
FR1048852A Cited
US2892339A Cited
US2912940A Cited
US3090162A Cited
US2827002A Cited
AU217470B2 Cited
US2928360A Cited
CH362204A Cited
US3015912A Cited
GB842739A Cited
BE561945A Cited
US3088187A Cited
US3080636A Cited
US3101272A Cited
GB925236A Cited
US3066376A Cited
FR1296632A Cited
US3233027A Cited
US3260024A Cited
FR1332590A Cited
US3286415A Cited
US3255991A Cited
FR1373529A Cited
US3251167A Cited
US3282017A Cited
US3295288A Cited

USPTO Annuity & Maintenance Windows

Annuity Stage Window Opens Payment Deadline Surcharge Period Until Estimated Fee Status
3.5 Years (Year 4) 1988-01-15 1988-07-16 1989-01-15 $2000.00 Window Closed / Lapsed
7.5 Years (Year 8) 1992-01-15 1992-07-16 1993-01-15 $3760.00 Window Closed / Lapsed
11.5 Years (Year 12) 1996-01-15 1996-07-16 1997-01-15 $7700.00 Window Closed / Lapsed

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