US3767157A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Sectional interior concrete form
Assignee: Individual
•
Filing: 1971-05-03
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Granted: 1973-10-23
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Expires: 1991-05-03
Abstract
Abstract Sectional interior concrete form having a plurality of sections. Two lower side sections have an upper longitudinal flange and are vertical members. Two upper parts of the form are corner sections, one of which is a key section. Flanges on each of its longitudinal edges, coact with one of the lower side pieces, and the other corner section. The other corner section also has a lower longitudinal flange complementing the flange on the other side section. Cross bars are included for spacing and adding rigidity between two side sections and between the two corner sections. Angle brace means are provided in each of the corner sections for strength and rigidity. Clamping means hold the mating flange edges together.
Inventors
- 👤 J Davis
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 04:46
CPC Classifications
E; E04; E04G; E04G11/00; E04G11/02
Claims Analysis
Total Claims: 16
Claim 1
Independent Claim
214 words
A sectional internal concrete form for crypts, culverts, tunnels and the like, comprising: a. first and second spaced apart generally vertically disposed side sections each of which has an inwardly acutely angled flange along the upper edge thereof, b. a corner third section having top and depending side panels each with an inwardly angled flange along the edge thereof, c. a corner fourth section also having top and depending side panels each with an inwardly angled flange along the edge thereof, d. the top panel flanges of said third and fourth sections complementarily coacting, and the sidE panel flange of said fourth section complementarily coacting with one of the flanges of said first and second side sections so that the angles of said flanges do not impede movement of said fourth section, e. the side panel flange of said third section complementarily coacting with the flange of the other of said first and second side section, and f. a plurality of releasable clamping means holding the coacting flanges of the form sections together when the form is in its assembled state, said coacting flanges being so angled with respect to each other that upon release of clamping means engaging the flanges of said fourth section it is free to drop away and be removed.
Claim 2
Dependent Claim
214 words
A sectional internal concrete form for crypts, culverts, tunnels and the like, comprising: a. first and second spaced apart generally vertically disposed side sections each of which has an inwardly acutely angled flange along the upper edge thereof, b. a corner third section having top and depending side panels each with an inwardly angled flange along the edge thereof, c. a corner fourth section also having top and depending side panels each with an inwardly angled flange along the edge thereof, d. the top panel flanges of said third and fourth sections complementarily coacting, and the sidE panel flange of said fourth section complementarily coacting with one of the flanges of said first and second side sections so that the angles of said flanges do not impede movement of said fourth section, e. the side panel flange of said third section complementarily coacting with the flange of the other of said first and second side section, and f. a plurality of releasable clamping means holding the coacting flanges of the form sections together when the form is in its assembled state, said coacting flanges being so angled with respect to each other that upon release of clamping means engaging the flanges of said fourth section it is free to drop away and be removed.
Claim 3
Dependent Claim
31 words
The sectional concrete form according to claim 1 and wherein each of said third and fourth sections is provided with longitudinal stiffener means on the inside surface of its side panel.
Claim 4
Dependent Claim
34 words
The sectional concrete form according to claim 2 and wherein both of said stiffener means are detachably interconnected by a plurality of cross bar bracing members when the form is in its assembled state.
Claim 5
Dependent Claim
30 words
The sectional concrete form according to claim 3 and wherein said stiffener means include cross bar retainers for receiving and detachably holding the ends of said cross bar bracing members.
Claim 6
Dependent Claim
29 words
The sectional concrete form according to claim 1 and wherein each of said first and second side sections is provided with longitudinal stiffener means on the inside surface thereof.
Claim 7
Dependent Claim
34 words
The sectional concrete form according to claim 5 and wherein both of said stiffener means are detachably interconnected by a plurality of cross bar bracing members when the form is in its assembled state.
Claim 8
Dependent Claim
30 words
The sectional concrete form according to claim 6 and wherein said stiffener means include cross bar retainers for receiving and detachably holding the ends of said cross bar bracing members.
Claim 9
Dependent Claim
231 words
A sectional internal concrete form for crypts, culverts, tunnels and the like, comprising: a. first and second spaced apart generally vertically disposed side sections each of which has an inwardly angled flange along the upper edge thereof, each of said flanges forming an acute angle to its respective panel, b. a corner third section having top and depending side panels each with an inwardly angled flange along the edge thereof, the flange on said top panel forming an acute angle to its panel and the flange on said side panel forming an obtuse angle to its panel, c. a corner fourth section also having top and depending side panels each with an inwardly angled flange along the edge thereof, each of said flanges forming an obtuse angle to its respective panel, d. the top panel flanges of said third and fourth sections complementarily coacting, and the side panel flange of said fourth section complementarily coacting with one of the flanges of said first and second side sections so that the angles of said flanges do not impede movement of said fourth section, e. the side panel flange of said third section complementarily coacting with the flange of the other of said first and second side section, and f. a plurality of releasable clamping means holding the coacting flanges of the form sections together when the form is in its assembled state.
Claim 10
Dependent Claim
231 words
A sectional internal concrete form for crypts, culverts, tunnels and the like, comprising: a. first and second spaced apart generally vertically disposed side sections each of which has an inwardly angled flange along the upper edge thereof, each of said flanges forming an acute angle to its respective panel, b. a corner third section having top and depending side panels each with an inwardly angled flange along the edge thereof, the flange on said top panel forming an acute angle to its panel and the flange on said side panel forming an obtuse angle to its panel, c. a corner fourth section also having top and depending side panels each with an inwardly angled flange along the edge thereof, each of said flanges forming an obtuse angle to its respective panel, d. the top panel flanges of said third and fourth sections complementarily coacting, and the side panel flange of said fourth section complementarily coacting with one of the flanges of said first and second side sections so that the angles of said flanges do not impede movement of said fourth section, e. the side panel flange of said third section complementarily coacting with the flange of the other of said first and second side section, and f. a plurality of releasable clamping means holding the coacting flanges of the form sections together when the form is in its assembled state.
Claim 11
Dependent Claim
31 words
The sectional concrete form according to claim 8 and wherein each of said third and fourth sections is provided with longitudinal stiffener means on the inside surface of its side panel.
Claim 12
Dependent Claim
34 words
The sectional concrete form according to claim 9 and wherein both of said stiffener means are detachably interconnected by a plurality of cross bar bracing members when the form is in its assembled state.
Claim 13
Dependent Claim
30 words
The sectional concrete form according to claim 10 and wherein said stiffener means include cross bar retainers for receiving and detachably holding the ends of said cross bar bracing members.
Claim 14
Dependent Claim
29 words
The sectional concrete form according to claim 8 and wherein each of said first and second side sections is provided with longitudinal stiffener means on the inside surface thereof.
Claim 15
Dependent Claim
34 words
The sectional concrete form according to claim 12 and wherein both of said stiffener means are detachably interconnected by a plurality of cross bar bracing members when the form is in its assembled state.
Claim 16
Dependent Claim
30 words
The sectional concrete form according to claim 13 and wherein said stiffener means include cross bar retainers for receiving and detachably holding the ends of said cross bar bracing members.
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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) | 1976-10-22 | 1977-04-23 | 1977-10-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-10-22 | 1981-04-23 | 1981-10-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-10-22 | 1985-04-23 | 1985-10-23 | $7700.00 | Window Closed / Lapsed |