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US4898358A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Form-work for concrete
Assignee: Individual
•
Filing: 1988-11-29
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Granted: 1990-02-06
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Expires: 2008-11-29
Abstract
Abstract Concrete form-work includes: (a) an edge beam including an elongated edge plate having a front face and a rear face, a pair of web portions projecting outwardly from said rear face and a flange member joined to the free end of each web portion, each flange member including a plate portion extending outwardly of said web and substantially parallel to said edge plate and a lip portion extending inwardly of the web, (b) a pair of connector members each comprising a plate with a hole for receiving a stake, an off-set wedge-receiving flange at one edge of the plate and a connector flange at the opposite edge of the plate, said connector flange including a J-shaped hook portion for hooking around a said edge beam flange lip and an abutment face for engaging a stake and (c) a wedge member adapted to engage the off-set flanges of said connector member to hold the connector member and force the connector member abutment faces into tight engagement with a stake.
Inventors
- 👤 John R. Spronken
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 22:02
CPC Classifications
E; E01; E01C; E01C19/00; E01C19/50; E01C19/502
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
183 words
Concrete form-work which comprises: (a) an edge beam comprising an elongated edge plate having a front face and a rear face, a pair of web portions projecting outwardly from said rear face with a vertical space therebetween and a flange member joined to the free end of each web portion, each flange member including a plate portion extending outwardly relative to the vertical space between the web portion and substantially parallel to said edge plate and a lip portion extending inwardly into said vertical space, (b) a pair of connector members each comprising a plate with a hole for receiving a stake, an off-set wedge-receiving flange at one edge of the plate and a connector flange at the opposite edge of the plate, each said connector flange including a J-shaped hook portion for hooking around each said edge beam flange lip and an abutment face for engaging a stake and (c) a wedge member for engaging the off-set flanges of said pair of connector members to hold the connector members and force the connector member abutment faces into tight engagement with the stake.
Claim 2
Dependent Claim
183 words
Concrete form-work which comprises: (a) an edge beam comprising an elongated edge plate having a front face and a rear face, a pair of web portions projecting outwardly from said rear face with a vertical space therebetween and a flange member joined to the free end of each web portion, each flange member including a plate portion extending outwardly relative to the vertical space between the web portion and substantially parallel to said edge plate and a lip portion extending inwardly into said vertical space, (b) a pair of connector members each comprising a plate with a hole for receiving a stake, an off-set wedge-receiving flange at one edge of the plate and a connector flange at the opposite edge of the plate, each said connector flange including a J-shaped hook portion for hooking around each said edge beam flange lip and an abutment face for engaging a stake and (c) a wedge member for engaging the off-set flanges of said pair of connector members to hold the connector members and force the connector member abutment faces into tight engagement with the stake.
Claim 3
Dependent Claim
15 words
The apparatus of claim 1 wherein said lip portion slopes inwardly toward the edge plate.
Claim 4
Dependent Claim
18 words
The apparatus of claim 1 wherein said web portions have a depth of about 1 to 6 inches.
Claim 5
Dependent Claim
28 words
The apparatus of claim 1 wherein the edge plate has a bead projecting from at least one of the top and bottom edges of the rear face thereof.
Claim 6
Dependent Claim
27 words
The apparatus of claim 4 wherein at least one of said flange members at the outer edge thereof a bead portion projecting inwardly toward said edge plate.
Claim 7
Dependent Claim
30 words
The apparatus of claim 5 which includes a vertical extension to the edge plate adapted to be held in position by a snap-fit over the edge plate and flange beads.
Claim 8
Dependent Claim
30 words
The apparatus of claim 1 which includes at least one T-bolt with the head thereof held between the lip portions of the edge plate and an outwardly projecting threaded portion.
Claim 9
Dependent Claim
13 words
The apparatus of claim 1 wherein the abutment face is a flat face.
Claim 10
Dependent Claim
24 words
The apparatus of claim 1 wherein the wedge member is a solid cast member having slots to slidably receive and retain the off-set flanges.
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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) | 1993-02-05 | 1993-08-07 | 1994-02-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1997-02-05 | 1997-08-07 | 1998-02-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2001-02-05 | 2001-08-07 | 2002-02-06 | $7700.00 | Window Closed / Lapsed |