US5219473A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Adjustable concrete formwork system
Assignee: Channel Form Systems Inc
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Filing: 1991-03-26
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Granted: 1993-06-15
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Expires: 2011-03-26
Abstract
Abstract This invention pertains to a novel adjustable formwork system which can be used in the manufacture of a wide range of structurally efficient cross-sectional shaped concrete beams, columns and structures. A cast-in-place concrete beam form comprising: (a) at least two spatially oriented upper sleeves, with an upper web located on one side of the two sleeves, and extending therebetween; (b) at least two spatially oriented lower sleeves, with a lower web located on one side of the two sleeves, and extending therebetween; and (c) at least two members, each member connecting telescopically the respective upper sleeve with the respective lower sleeve, said telescoping members enabling the two upper sleeves to be raised or lowered relative to the two lower sleeves.
Inventors
- 👤 Stanley R. Sandwith
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 04:24
CPC Classifications
B; B28; B28B; B28B7/00; B28B7/0002; B28B7/0014; B28B7/0029; B28B7/02; E; E04; E04G; E04G13/00; E04G13/04; E04G9/00; E04G9/08; E04G11/00; E04G11/36; E04G11/48; E04G11/50; E04G2011/505
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
135 words
A cast-in-place concrete beam form comprising: (a) at least two spatially oriented first members, with a first planar sheet located on one side of and affixed to the two first members, and extending therebetween; (b) at least two spatially oriented second members, positionally matching with the respective first members, with a second planar sheet located on one side of and affixed to the two second members, and extending therebetween on the same side of the second members as the first planar sheet on the first members; and (c) at least two member connecting means, each means connecting telescopically a respective first member with a respective second member, said member connecting means enabling the first members and the first planar sheet to be extended or contracted relative to the second members and the second planar sheet.
Claim 2
Dependent Claim
135 words
A cast-in-place concrete beam form comprising: (a) at least two spatially oriented first members, with a first planar sheet located on one side of and affixed to the two first members, and extending therebetween; (b) at least two spatially oriented second members, positionally matching with the respective first members, with a second planar sheet located on one side of and affixed to the two second members, and extending therebetween on the same side of the second members as the first planar sheet on the first members; and (c) at least two member connecting means, each means connecting telescopically a respective first member with a respective second member, said member connecting means enabling the first members and the first planar sheet to be extended or contracted relative to the second members and the second planar sheet.
Claim 3
Dependent Claim
23 words
A form as claimed in claim 1 wherein an elongated strip is positioned between the first planar sheet and the second planar sheet.
Claim 4
Dependent Claim
38 words
A form as claimed in claim 1 wherein the portion of the first planar sheet, and the ajdacent portion of the second planar sheet, together protrude away from the first and second members to form a common protrusion.
Claim 5
Dependent Claim
18 words
A form as claimed in claim 3 wherein the first members are elevated relative to the second members.
Claim 6
Dependent Claim
18 words
A form as claimed in claim 4 wherein a web extends between the protruding first and second sheets.
Claim 7
Dependent Claim
49 words
A form as claimed in claim 1 wherein a strip extends from a free end of one first member to a free end of the other first member, and a strip extends from the free end of one second member to the free end of the other second member.
Claim 8
Dependent Claim
49 words
A form as claimed in claim 1 arranged in parallel and opposed to a second concrete form of the same configuration, the first and second planar sheets facing one anotehr to define a cavity in which concrete can be poured to form a concrete beam having a rectangular cross-section.
Claim 9
Dependent Claim
18 words
A form as claimed in claim 7 wherein the pair of opposed forms are held together by snap-ties.
Claim 10
Dependent Claim
46 words
A form as claimed in claim 3 arranged in parallel and opposed to a second concrete form of the same configuration, the respective protrusions facing one another to define a cavity in which concrete can be poured to form a concrete beam having an "I" cross-section.
Claim 11
Dependent Claim
83 words
A concrete form as claimed in claim 1 arranged in parallel and opposed to a second conrete form, wherein the portion of the first planar sheet, and the adjacent portion of the second planar sheet, together protrude away from the first and second members to form a common protrusion, the planar sheets of the first form facing the protruding sheets of the second form to define a cavity in which concrete can be poured to form a concrete beam having an "C" cross-section.
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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) | 1996-06-14 | 1996-12-14 | 1997-06-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2000-06-14 | 2000-12-14 | 2001-06-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2004-06-14 | 2004-12-14 | 2005-06-15 | $7700.00 | Window Closed / Lapsed |