US4073045A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Convector for heating rooms
Assignee: Studsvik Energiteknik AB
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Filing: 1975-04-25
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Granted: 1978-02-14
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Expires: 1995-04-25
Abstract
Abstract There is provided a convector for heating rooms and a method for manufacturing same. This convector comprises a plastic tube wound to form a flat coil. The plastic used for the tube is preferably a cross-linked plastic, such as cross-linked polyethylene. Some of the coil-turns may be displaced inwards or outwards from the basic shape of the tube coil, in order to improve the convection.
Inventors
- 👤 Peter H. E. Margen
- 👤 Harry E. Grimstedt
- 👤 Jan A. Bosaeus
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 14:39
CPC Classifications
B; B23; B23P; B23P15/00; B23P15/26; B29; B29C; B29C53/00; B29C53/02; B29C53/12; F; F28; F28D; F28D1/00; F28D1/02; F28D1/04; F28D1/047; F28D1/0472; F28F; F28F21/00; F28F21/06; F28F21/062; F28F21/063; B29L; B29L2031/00; B29L2031/779; Y; Y10; Y10T; Y10T29/00; Y10T29/49; Y10T29/4935
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
108 words
Method of manufacturing a convector for heating rooms comprising forming two uprights each having an upwardly extending central axis and a plurality of guide surfaces curved in the direction extending tranversely of the central axis with the guide surfaces alternating in the upward direction of the uprights, displacing adjacent guide surfaces equal distances from and in the opposite direction from the central axis, winding a tube of cross-linked polyethylene while it is still warm from the cross-linking process serially around the alternating guide surfaces for forming a helical coil, displacing the uprights out of engagement with the helically coiled tube and removing the uprights from within the coil.
Claim 2
Dependent Claim
108 words
Method of manufacturing a convector for heating rooms comprising forming two uprights each having an upwardly extending central axis and a plurality of guide surfaces curved in the direction extending tranversely of the central axis with the guide surfaces alternating in the upward direction of the uprights, displacing adjacent guide surfaces equal distances from and in the opposite direction from the central axis, winding a tube of cross-linked polyethylene while it is still warm from the cross-linking process serially around the alternating guide surfaces for forming a helical coil, displacing the uprights out of engagement with the helically coiled tube and removing the uprights from within the coil.
Claim 3
Dependent Claim
38 words
Method according to claim 1, characterized by displacing selected long sides of the tube relative to an upwardly extending plane through the uprights while the tube is still warm after the cross-linking process and following the winding step.
Claim 4
Dependent Claim
18 words
Method according to claim 1, characterized by arranging the central axis of the uprights in substantially parallel relation.
Claim 5
Dependent Claim
71 words
Method according to claim 3, characterized by placing at least one double comb within the coil, placing single combs outside the coil on both sides opposite each double comb, pivotally mounting the combs in a jig with the journalling points permitting adjacent combs to engage with each other, turning adjacent combs in a common plane while displacing predetermined long sides of the coiled tube, and securing adjacent combs to each other.
Claim 6
Dependent Claim
50 words
Method according to claim 3, characterized in that before removing the uprights, fitting two guide elements on one long side of the coil at the ends of the coil, after which removing the uprights and then fitting a temple at the middle of the coil to clamp the coil together.
Claim 7
Dependent Claim
23 words
Method according to claim 3, characterized by before removing the uprights, pushing comb frames over the wound coil, after which removing the uprights.
Claim 8
Dependent Claim
45 words
Method according to claim 6, characterized by securing the tube coil by inserting a spacer into the coil which, together with the comb frame, forms a matrix which maintains predetermined spacing of the long sides of the coil but permits axial movement of the tube.
Claim 9
Dependent Claim
25 words
Method according to claim 6, characterized by removing the uprights by turning the uprights about an upwardly extending axis and moving them toward one another.
Claim 10
Dependent Claim
14 words
Method according to claim 6, characterized by removing the uprights by disassembling the uprights.
References Cited (Backward Citations)
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Cited
US1901090A
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US1993171A
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US2056862A
Cited
US2657020A
Cited
US3277959A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1981-02-13 | 1981-08-15 | 1982-02-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1985-02-13 | 1985-08-15 | 1986-02-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1989-02-13 | 1989-08-15 | 1990-02-14 | $7700.00 | Window Closed / Lapsed |