Patent US4411404A successfully refreshed from Google Patents.
US4411404A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Holding clips for stakes supporting metal concrete forms
Assignee: CARDINAL Manufacturing Co
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Filing: 1982-06-09
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Granted: 1983-10-25
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Expires: 2002-06-09
Abstract
Abstract A metal concrete joint form is shown supported on a plurality of spaced metal stakes. The top end of each stake is flattened. The concrete joint form is an elongated sheet metal member having an inverted hook portion at the top edge of the form for receiving the flattened top end of the stake. The main body of the stake has a semi-circular shape in transverse cross section. The invention is a separate holding clip that is made to straddle the main body of the stake and engages beneath the lower edge of the sheet metal form and is snapped into engagement with the stake for holding the sheet metal form against the stake while the concrete is being poured on either side of the form to form a monolithically poured concrete slab.
Inventors
- 👤 Albert P. Weisbach
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 03:10
CPC Classifications
E; E01; E01C; E01C11/00; E01C11/02; E01C11/04; E01C11/08
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
267 words
The combination of an interlocking metal concrete joint form supported on a plurality of vertical stakes for use in pouring concrete slabs, said combination comprising: a. a plurality of expendable metal stakes, each stake being a narrow, elongated member having a main body of semi-circular shape in transverse cross section, the top end of each stake being generally flattened to create a generally straight edge on one side of the stake that includes the two vertical parallel sides of the semi-circular shape; b. and an expendable, relatively rigid, elongated sheet metal form with a transverse cross section having a vertically extending planar portion with an offset protruding key portion adjacent its mid-height, and an inverted hook portion adjacent the top edge of the form on the side that is opposite the said protruding key portion, said hook portion having a downturned flange that is spaced away from the said vertical planar portion and adapted for engaging over the flattened upper end of the said vertical stakes; c. the invention comprising a separate holding clip for each stake which is made to straddle the main body of the stake after the elongated form is supported on the spaced stakes, the clip having an upper portion with finger means that are adapted to engage the lower edge of the sheet metal form, on the side of the form opposite the stake and the clip having a lower portion with a pair of ear means that are able to snap around the opposite edges of the stake for fastening the lower portion of the sheet metal form against the stake.
Claim 2
Dependent Claim
267 words
The combination of an interlocking metal concrete joint form supported on a plurality of vertical stakes for use in pouring concrete slabs, said combination comprising: a. a plurality of expendable metal stakes, each stake being a narrow, elongated member having a main body of semi-circular shape in transverse cross section, the top end of each stake being generally flattened to create a generally straight edge on one side of the stake that includes the two vertical parallel sides of the semi-circular shape; b. and an expendable, relatively rigid, elongated sheet metal form with a transverse cross section having a vertically extending planar portion with an offset protruding key portion adjacent its mid-height, and an inverted hook portion adjacent the top edge of the form on the side that is opposite the said protruding key portion, said hook portion having a downturned flange that is spaced away from the said vertical planar portion and adapted for engaging over the flattened upper end of the said vertical stakes; c. the invention comprising a separate holding clip for each stake which is made to straddle the main body of the stake after the elongated form is supported on the spaced stakes, the clip having an upper portion with finger means that are adapted to engage the lower edge of the sheet metal form, on the side of the form opposite the stake and the clip having a lower portion with a pair of ear means that are able to snap around the opposite edges of the stake for fastening the lower portion of the sheet metal form against the stake.
Claim 3
Dependent Claim
132 words
The combination as is recited in claim 1, wherein the said holding clip also has a semi-circular shape in transverse cross section for conforming to the shape of the said main body of the stake, the upper edge of the clip having a concave recess, and the two vertical sides of the clip being formed to create two parallel, upwardly-extending fingers for engaging under the lower edge of the sheet metal form, on the side of the form opposite the stake while the lower edge of the clip is provided with a pair of oppositely-directed ears which are adapted to snap into engagement with the opposite side edges of the stake for holding the clip on the stake and thereby holding the lower portion of the sheet metal form against the stake.
Claim 4
Dependent Claim
34 words
The combination as is recited in claim 2, wherein a notch is formed in each vertical side edge of the clip just above each ear in order to furnish each ear with spring resilience.
Claim 5
Dependent Claim
48 words
The combination as is recited in claim 3, wherein each upwardly-extending finger is formed with a tapered edge surface for engaging behind the lower edge of the said sheet metal form to create a resilient lever action for drawing the metal form against the side of the stake.
Claim 6
Dependent Claim
113 words
The combination as is recited in claim 2, wherein the said concave recess in the upper edge of the clip serves as a fulcrum edge working against the semi-circular shape of the main body of the stake as a support during the assembly of the clip to the stake so that the clip acts as a lever to first engage the two upwardly-extending fingers under and behind the lower edge of the said sheet metal form, and pressure is then applied against the lower portion of the clip to cause it to pivot on the said fulcrum edge until the said pair of ears snap around the opposite side edges of the stake.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1986-10-24 | 1987-04-25 | 1987-10-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1990-10-24 | 1991-04-25 | 1991-10-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1994-10-24 | 1995-04-25 | 1995-10-25 | $7700.00 | Window Closed / Lapsed |