Patent US4238105A successfully refreshed from Google Patents.
US4238105A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Mold panel for casting concrete
Assignee: WALZ PETER O FRAMINGHAM
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Filing: 1979-01-22
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Granted: 1980-12-09
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Expires: 1999-01-22
Abstract
Abstract A heated mold panel for casting concrete has a rigid base providing a base surface, a substantial part of which is grooved by interconnecting grooves, has a continuous heating element laid in the grooves, and the base surface is covered with a non-porous, non-corrosive material that provides a smooth outside surface covering the base surface, spanning the grooves and enclosing the element in interconnecting passages defined by the grooves and the covering material. Sufficient clearance is provided in said passages around the element for air to flow freely from passage to passage, whereby heat flow from the element to the concrete poured against the outside surface is by radiation from the element and by convection of air flowing in the passages around the element.
Inventors
- 👤 Gardner D. West
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 21:25
CPC Classifications
B; B28; B28B; B28B7/00; B28B7/40; B28B7/46; B28B7/42; E; E04; E04G; E04G9/00; E04G9/10; Y; Y10; Y10S; Y10S264/00; Y10S264/46
Claims Analysis
Total Claims: 15
Claim 1
Independent Claim
111 words
A heated mold panel for casting concrete comprising, (a) a panel base providing a rigid supportive base surface defining the panel size and contours, (b) a plurality of connecting grooves in the base surface, (c) a heating element in the grooves, (d) at least one layer of material covering the surface and the grooves in intimate contact with the surface and bonded thereto providing a smooth outer surface substantially parallel to the base surface, and (e) heating element controlling means connecting the element to a source of energy, (f) whereby the temperature of the element is controlled and heat flows from the element to the concrete poured against the outer surface.
Claim 2
Dependent Claim
111 words
A heated mold panel for casting concrete comprising, (a) a panel base providing a rigid supportive base surface defining the panel size and contours, (b) a plurality of connecting grooves in the base surface, (c) a heating element in the grooves, (d) at least one layer of material covering the surface and the grooves in intimate contact with the surface and bonded thereto providing a smooth outer surface substantially parallel to the base surface, and (e) heating element controlling means connecting the element to a source of energy, (f) whereby the temperature of the element is controlled and heat flows from the element to the concrete poured against the outer surface.
Claim 3
Dependent Claim
24 words
A mold panel as in claim 1 wherein, (a) the grooves are sufficiently deep that the elements do not protrude across the base surface.
Claim 4
Dependent Claim
25 words
A mold panel as in claim 2 wherein, (a) the grooves are sufficiently large in cross-section that air flows through the grooves around the element.
Claim 5
Dependent Claim
28 words
A mold panel as in claim 1 wherein, (a) means are provided on the base for securing the panel in position for pouring concrete against the outer surface.
Claim 6
Dependent Claim
18 words
A mold panel as in claim 1 wherein, (a) the layer of material is resin impregnated glass fibre.
Claim 7
Dependent Claim
25 words
A mold panel as in claim 1 wherein, (a) the base has edges, and (b) the layer of material at least partially covers said edges.
Claim 8
Dependent Claim
15 words
A mold panel as in claim 1 wherein, (a) the base is relatively heavy plywood.
Claim 9
Dependent Claim
28 words
A mold panel as in claim 1 wherein, (a) the grooves define a continuous path from a beginning point to an end point immediately adjacent the beginning point.
Claim 10
Dependent Claim
53 words
A mold panel as in claim 8 wherein, (a) the heating element is continuous over said continuous path having one end at the beginning point and the other end at the end point, and (b) means are provided between the beginning and end points for connecting the elements to the source of energy.
Claim 11
Dependent Claim
32 words
A mold panel as in claim 9 wherein, (a) means are provided between the beginning and end points for controlling energy to the element in response to the temperature of the concrete.
Claim 12
Dependent Claim
28 words
A mold panel as in claim 9 wherein, (a) means are provided for indicating when the element reaches a predetermined temperature to show if the power is on.
Claim 13
Dependent Claim
19 words
A mold panel as in claim 10 wherein, (a) the element is electric and the source is electric power.
Claim 14
Dependent Claim
23 words
A mold panel as in claim 12 wherein, (a) a temperature sensitive electric switch is provided electrically connected in series with the element.
Claim 15
Dependent Claim
30 words
A mold panel as in claim 13 wherein, (a) The switch is normally closed and opens when the temperature of the panel near the outside surface reaches a predetermined temperature.
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) | 1983-12-09 | 1984-06-09 | 1984-12-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1987-12-09 | 1988-06-09 | 1988-12-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1991-12-09 | 1992-06-09 | 1992-12-09 | $7700.00 | Window Closed / Lapsed |