US4728073A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Formwork for forming reservoirs and pools
Assignee: Individual
•
Filing: 1986-05-16
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Granted: 1988-03-01
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Expires: 2006-05-16
Abstract
Abstract Formwork (15) for moulding walls of reservoirs in any desired curved configuration. The formwork utilizes a flexible panel (18) having a form surface (17) on one side against which the reservoir wall may be moulded and connector means (37) on the other side for connecting adjustable bracing (36) thereto for holding the formwork in position. The bracing may be adjusted to vary the curvature of the formwork.
Inventors
- 👤 Brian R. Smith
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 22:38
CPC Classifications
E; E04; E04G; E04G9/00; E04G9/02; E04G9/06; E04G11/00; E04G11/06; E04G11/062; E04G11/065; E04H; E04H4/00; E04H4/0075; E04H4/0081; Y; Y10; Y10S; Y10S249/00; Y10S249/03
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
159 words
Formwork assembly against which a wall may be molded, comprising: an elongate rectangular flexible panel having a form surface at one side of said panel; a plurality of panel stiffeners spaced along the opposite side of said panel, said stiffeners including a tubular socket mounted to said panel, a rigid fork connector having a central prong slidably engageable in said tubular socket and outer prongs slidably engageable in further sockets fixed to a lower portion of said panel and a bridging member extending between said outer prongs; a plurality of connector means each being mounted on a respective bridging member for connecting locating means thereto for holding said panel in a selected configuration, said locating means including adjustable elongate turn-buckles spanning between and connecting to a pair of said connector means and in overlapping relationship with connector means intermediate said pair of connector means, to thereby maintain a panel intermediate said pair of connector means in a selected configuration.
Claim 2
Dependent Claim
159 words
Formwork assembly against which a wall may be molded, comprising: an elongate rectangular flexible panel having a form surface at one side of said panel; a plurality of panel stiffeners spaced along the opposite side of said panel, said stiffeners including a tubular socket mounted to said panel, a rigid fork connector having a central prong slidably engageable in said tubular socket and outer prongs slidably engageable in further sockets fixed to a lower portion of said panel and a bridging member extending between said outer prongs; a plurality of connector means each being mounted on a respective bridging member for connecting locating means thereto for holding said panel in a selected configuration, said locating means including adjustable elongate turn-buckles spanning between and connecting to a pair of said connector means and in overlapping relationship with connector means intermediate said pair of connector means, to thereby maintain a panel intermediate said pair of connector means in a selected configuration.
Claim 3
Dependent Claim
32 words
Formwork assembly according to claim 1, wherein said rigid fork connector has a stem which extends outwardly beyond said panel to provide a mounting for a locating means for positioning said panel.
Claim 4
Dependent Claim
17 words
Formwork assembly according to claim 1, wherein said flexible panel is formed of fiberglass reinforced plastics material.
Claim 5
Dependent Claim
161 words
Demountable formwork against which a reservoir wall may be formed, comprising: an elongate substantially rectangular flexible panel having a form surface at one side of said panel; a plurality of detachable elongate supporting brackets mounted to and being spaced along the opposite side of said panel and having mounting means thereon intermediate longitudinal edges of said panel for supporting length adjustable tie rods, said length adjustable tie rods extending between respective pairs of said supporting brackets and in overlapping relationship with one another; and retaining means on said opposite side for retaining said supporting brackets each said retaining means including an elongate socket mounted to said panel and each said supporting bracket comprises a rigid fork connector having a central prong which is slidably engageable in said socket and outer prongs which are engageable in further sockets fixed to a lower portion of said panel and wherein said mounting means is supported on a bridging member extending between said outer prong.
Claim 6
Dependent Claim
161 words
Demountable formwork against which a reservoir wall may be formed, comprising: an elongate substantially rectangular flexible panel having a form surface at one side of said panel; a plurality of detachable elongate supporting brackets mounted to and being spaced along the opposite side of said panel and having mounting means thereon intermediate longitudinal edges of said panel for supporting length adjustable tie rods, said length adjustable tie rods extending between respective pairs of said supporting brackets and in overlapping relationship with one another; and retaining means on said opposite side for retaining said supporting brackets each said retaining means including an elongate socket mounted to said panel and each said supporting bracket comprises a rigid fork connector having a central prong which is slidably engageable in said socket and outer prongs which are engageable in further sockets fixed to a lower portion of said panel and wherein said mounting means is supported on a bridging member extending between said outer prong.
Claim 7
Dependent Claim
15 words
Demountable formwork according to claim 4, wherein said central prong extends upwardly beyond said panel.
References Cited (Backward Citations)
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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) | 1991-03-01 | 1991-08-31 | 1992-03-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1995-03-01 | 1995-08-31 | 1996-03-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1999-03-01 | 1999-08-31 | 2000-03-01 | $7700.00 | Window Closed / Lapsed |