US4292500A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Modular, constructional heating unit
Assignee: Rhone Poulenc Industries SA
•
Filing: 1978-09-07
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Granted: 1981-09-29
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Expires: 1998-09-07
Abstract
Abstract A modular, constructional heating unit, useful, e.g., for the fabrication of interior partitions, is comprised of a panel member provided with at least one elongate rectilinear cavity, the longitudinal axis of such cavity being parallel to a face surface of the panel, said cavity being exteriorly communicating at one or both of its ends, and said cavity containing an electrical heating element.
Inventors
- 👤 Daniel Semanaz
- 👤 Robert Cassat
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 04:03
CPC Classifications
F; F24; F24D; F24D13/00; F24D13/02; F24D13/022; F24D13/024; E; E04; E04C; E04C2/00; E04C2/44; E04C2/52; E04C2/521; E04C2/525; H; H05; H05B; H05B3/00; H05B3/20; H05B3/22; Y; Y02; Y02B; Y02B30/00
Claims Analysis
Total Claims: 32
Claim 1
Independent Claim
185 words
A modular, constructional heating unit, which can be used for producing heating partitions by juxtaposition, said heating unit consisting essentially of a plaster based solid panel formed of at least one member; said panel having opposing, essentially parallel front and back face surfaces and a plurality of edge surfaces, and being provided with at least one internal, elongate, continuously rectilinear cavity, each such cavity being internally shaped into said solid panel between the front and back face surfaces thereof, the longitudinal axis of each such cavity being parallel to the face surfaces of the panel, each such cavity being exteriorly communicating through said panel at one of its ends, and each such cavity containing in the free space thereof an electrical heating element and means for coupling said heating element to an electrical power source, said electrical heating element being in the form of a flexible strip including an electrical wire embedded more than 50% in an electrically insulating material comprised of a macromolecular material and a reinforcing filler, said strip being arranged along a plane generally perpendicular to the face surface of the panel.
Claim 2
Dependent Claim
185 words
A modular, constructional heating unit, which can be used for producing heating partitions by juxtaposition, said heating unit consisting essentially of a plaster based solid panel formed of at least one member; said panel having opposing, essentially parallel front and back face surfaces and a plurality of edge surfaces, and being provided with at least one internal, elongate, continuously rectilinear cavity, each such cavity being internally shaped into said solid panel between the front and back face surfaces thereof, the longitudinal axis of each such cavity being parallel to the face surfaces of the panel, each such cavity being exteriorly communicating through said panel at one of its ends, and each such cavity containing in the free space thereof an electrical heating element and means for coupling said heating element to an electrical power source, said electrical heating element being in the form of a flexible strip including an electrical wire embedded more than 50% in an electrically insulating material comprised of a macromolecular material and a reinforcing filler, said strip being arranged along a plane generally perpendicular to the face surface of the panel.
Claim 3
Dependent Claim
16 words
The constructional heating unit as defined by claim 1, wherein the panel is comprised of plaster.
Claim 4
Dependent Claim
27 words
The constructional heating unit as defined by claims 1 or 2, wherein the panel is provided with more than one cavity, each being parallel to the others.
Claim 5
Dependent Claim
18 words
The constructional heating unit as defined by claim 1, wherein the rectilinear cavity is generally cylindrical in shape.
Claim 6
Dependent Claim
18 words
The constructional heating unit as defined by claim 1, wherein the rectilinear cavity is generally polygonal in shape.
Claim 7
Dependent Claim
18 words
The constructional heating unit as defined by claim 1, wherein the rectilinear cavity is generally triangular in shape.
Claim 8
Dependent Claim
15 words
The constructional heating unit as defined by claim 1, wherein the panel member is square.
Claim 9
Dependent Claim
34 words
The constructional heating unit as defined by claim 1, wherein the cavity has a length of between 40% and 95% of the length of the sides of the panel member which are parallel thereto.
Claim 10
Dependent Claim
31 words
The constructional heating unit as defined by claim 1, comprising a cylindrical cavity having a polygonal base, and wherein at least two faces of this cavity are covered with heat-reflecting means.
Claim 11
Dependent Claim
46 words
The constructional heating unit as defined by claim 4, wherein the cylindrical cavity has a triangular base, one of the faces of such cylinder being parallel to one of the face surfaces of the panel and the other two faces being covered with the reflecting means.
Claim 12
Dependent Claim
23 words
The constructional heating unit as defined by claim 2, wherein that portion of the module comprised of plaster is a single molded element.
Claim 13
Dependent Claim
22 words
The constructional heating unit as defined by claim 2, wherein that portion of the module comprised of plaster comprises two component parts.
Claim 14
Dependent Claim
63 words
The constructional heating unit as defined by claim 12, wherein the rectilinear cavity has a cylindrical shape with a triangular base, the surface of one of the component parts forming the wall of one of the faces of the cavity, and the other two faces of the cavity being formed by a groove of V-shaped cross section, formed in the second component part.
Claim 15
Dependent Claim
54 words
The constructional heating unit as defined by claim 13, wherein the component part forming the wall of one of the faces of the cavity possesses a rectilinear groove, the direction of which is parallel to that of the cavity and which is located in the median region of the said face of the cavity.
Claim 16
Dependent Claim
49 words
The constructional heating unit as defined by claim 1, wherein the electrical heating element comprises: (a) an electrically insulating material comprising the combination of a reinforcing filler of elongate structure with a polyimide resin, and (b) an electrical resistor comprising two webs of electrically conducting and electrically resistant wires.
Claim 17
Dependent Claim
52 words
The constructional heating unit as defined by claim 15, wherein: (i) each of the two webs is arranged on either side of the support material (a); (ii) the wires of one and the same web are parallel to each other; and (iii) said wires are covered with an electrically insulating, heat-stable varnish.
Claim 18
Dependent Claim
22 words
The constructional heating unit as defined by claim 15, wherein the reinforcing filler of elongate structure is a material of flake type.
Claim 19
Dependent Claim
40 words
The constructional heating unit as defined by claim 17, wherein the reinforcing filler is selected from the group comprising mica, asbestos fibers, glass fibers ceramic fibers, woven fabrics non-woven fabrics, mats of glass fibers, and non-woven fabrics of asbestos fibers.
Claim 20
Dependent Claim
27 words
The constructional heating unit as defined by claim 15, wherein the polyimide resin is obtained by reacting a bisimide of an unsaturated dicarboxylic acid with a polyamine.
Claim 21
Dependent Claim
15 words
The constructional heating unit as defined by claim 1, wherein the panel member is trapezoidal.
Claim 22
Dependent Claim
15 words
The constructional heating unit as defined by claim 1, wherein the panel member is rectangular.
Claim 23
Dependent Claim
33 words
The constructional heating unit as defined by claim 1, each such cavity being exteriorly communicating through said panel to both an edge surface and face surface thereof at only one of its ends.
Claim 24
Dependent Claim
31 words
The constructional heating unit as defined by claims 1 or 22, the volume of external communication through said panel including a recess having a greater cross-section than that of the cavity.
Claim 25
Dependent Claim
43 words
The constructional heating unit as defined by claim 23, wherein the dimension of the recess in the direction determined by the length of the rectilinear cavity is between 2 and 20% of the dimension of the panel member parallel to the said direction.
Claim 26
Dependent Claim
56 words
The constructional heating unit as defined by claim 23, wherein same comprises at least two rectilinear cavities, each comprising a recess, and, for two of such cavities, the recesses located at the position of their apertures openly communicate onto one face surface and two sides which are adjacent to one another and to such face surface.
Claim 27
Dependent Claim
13 words
The constructional heating unit as defined by claim 22, comprising two rectilinear cavities.
Claim 28
Dependent Claim
13 words
The constructional heating unit as defined by claim 22, comprising three rectilinear cavities.
Claim 29
Dependent Claim
13 words
The constructional heating unit as defined by claim 23, comprising two rectilinear cavities.
Claim 30
Dependent Claim
13 words
The constructional heating unit as defined by claim 23, comprising three rectilinear cavities.
Claim 31
Dependent Claim
22 words
The constructional hearing unit as defined by claim 23, wherein the reinforcing filler of elongate structure is a material of fibrous type.
Claim 32
Dependent Claim
28 words
The constructional heating unit as defined by claim 1, wherein the panel is comprised of a member selected from the group consisting of cement, concrete and baked-clay brick.
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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) | 1984-09-28 | 1985-03-30 | 1985-09-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1988-09-28 | 1989-03-30 | 1989-09-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1992-09-28 | 1993-03-30 | 1993-09-29 | $7700.00 | Window Closed / Lapsed |