Patent US4125761A successfully refreshed from Google Patents.
US4125761A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Bilateral heater unit
Assignee: SOUTHPORT ENTERPRISES Inc
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Filing: 1976-08-06
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Granted: 1978-11-14
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Expires: 1996-08-06
Abstract
Abstract A bilateral heater unit including an elongated sheath in the form of two substantially parallel adjacent leg portions interconnected by a return bend portion formed of the elongated sheath bent back upon itself and integral with the adjacent parallel extending leg portions. Each of the leg portions is provided with a terminal portion extending outwardly from the end of the leg portion and spaced from the sheath. A resistor assembly is secured between the terminal of each of the leg portions and extends along the sheath between the terminals, the sheath between the terminals being filled with compacted powder insulation spacing the resistor assembly from the sheath. The parallel extending leg portions have opposing inner surfaces thereof spaced from one another and the resistor assembly may include at least one electrically conductive member extending within the sheath along the portion thereof for producing a non-heat generating zone thereat.
Inventors
- 👤 John W. Churchill
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 17:19
CPC Classifications
H; H05; H05B; H05B3/00; H05B3/40; H05B3/42; H05B3/48; H05B3/44
Claims Analysis
Total Claims: 27
Claim 1
Independent Claim
170 words
A bilateral heater unit comprising an elongated sheath in the form of two substantially parallel adjacent leg portions interconnected by a return bend portion formed of said elongated sheath bent back upon itself and being integral with the adjacent parallel extending leg portions, said leg portions being noncircular in cross-section and having arcuate outer portions circumscribing substantial portions of a circle, each of said leg portions having terminal means extending outwardly from the adjacent end portion thereof and spaced from said sheath, resistor assembly means secured between said terminal means of each of said leg portions and extending along the sheath between said terminal means, said sheath between said terminal means being filled with compacted powder insulation spacing said resistor assembly means from said sheath, said resistor assembly means including resistive heating means and at least one electrically conductive member extending within said sheath along a portion thereof between said terminal means, said at least one electrically conductive member having a length sufficient for producing a non-heat generating zone thereat.
Claim 2
Dependent Claim
170 words
A bilateral heater unit comprising an elongated sheath in the form of two substantially parallel adjacent leg portions interconnected by a return bend portion formed of said elongated sheath bent back upon itself and being integral with the adjacent parallel extending leg portions, said leg portions being noncircular in cross-section and having arcuate outer portions circumscribing substantial portions of a circle, each of said leg portions having terminal means extending outwardly from the adjacent end portion thereof and spaced from said sheath, resistor assembly means secured between said terminal means of each of said leg portions and extending along the sheath between said terminal means, said sheath between said terminal means being filled with compacted powder insulation spacing said resistor assembly means from said sheath, said resistor assembly means including resistive heating means and at least one electrically conductive member extending within said sheath along a portion thereof between said terminal means, said at least one electrically conductive member having a length sufficient for producing a non-heat generating zone thereat.
Claim 3
Dependent Claim
46 words
A bilateral heater unit according to claim 1, wherein said at least one electrically conductive member extends from one of said terminal means so as to provide a non-heat generating zone from said terminal means along at least a portion of said one parallel leg portion.
Claim 4
Dependent Claim
23 words
A bilateral heater unit according to claim 1, wherein said non-heating generating zone is provided in the region of said return bend portion.
Claim 5
Dependent Claim
23 words
A bilateral heater unit according to claim 1, wherein said parallel adjacent leg portions have opposing inner surfaces thereof spaced from one another.
Claim 6
Dependent Claim
26 words
A bilateral heater unit according to claim 3, further comprising insulating means disposed within the spacing between said opposing inner surfaces of said adjacent leg portions.
Claim 7
Dependent Claim
28 words
A bilateral heater unit according to claim 4, wherein said opposing inner surfaces of said spaced parallel adjacent leg portions have one of a planar and non-planar configuration.
Claim 8
Dependent Claim
23 words
A bilateral heater unit according to claim 6, wherein said non-planar configuration includes at least one of a curved and a V-shaped configuration.
Claim 9
Dependent Claim
18 words
A bilateral heater unit according to claim 1, wherein said elongated sheath is provided with indentation means therein.
Claim 10
Dependent Claim
15 words
A bilateral heater unit according to claim 8, wherein said indentation means includes a groove.
Claim 11
Dependent Claim
59 words
A bilateral heater unit according to claim 1, further comprising a member to be heated having an opening in which said bilateral heater unit is inserted, said member having a hollow portion adjacent the opening thereof, said bilateral heater unit being disposed in said opening with said non-heat generating zone thereof proximate to said hollow portion of said member.
Claim 12
Dependent Claim
151 words
A bilateral heater unit comprising an elongated sheath in the form of two substantially parallel adjacent leg portions interconnected by a return bend portion formed of said elongated sheath bent back upon itself and being integral with the adjacent parallel extending leg portions, said return bend portion including a part having a substantially circular cross section, said leg portions being non-circular in cross section and having arcuate outer portions circumscribing substantial portions of a circle, said leg portions having opposing inner surfaces thereof spaced from one another, each of said leg portions having terminal means extending outwardly from the adjacent end portion thereof and spaced from said sheath, resistor assembly means secured between said terminal means of each of said leg portions and extending along the sheath between said terminal means, said sheath between said terminal means being filled with compacted powder insulation spacing said resistor assembly means from said sheath.
Claim 13
Dependent Claim
151 words
A bilateral heater unit comprising an elongated sheath in the form of two substantially parallel adjacent leg portions interconnected by a return bend portion formed of said elongated sheath bent back upon itself and being integral with the adjacent parallel extending leg portions, said return bend portion including a part having a substantially circular cross section, said leg portions being non-circular in cross section and having arcuate outer portions circumscribing substantial portions of a circle, said leg portions having opposing inner surfaces thereof spaced from one another, each of said leg portions having terminal means extending outwardly from the adjacent end portion thereof and spaced from said sheath, resistor assembly means secured between said terminal means of each of said leg portions and extending along the sheath between said terminal means, said sheath between said terminal means being filled with compacted powder insulation spacing said resistor assembly means from said sheath.
Claim 14
Dependent Claim
25 words
A bilateral heater unit according to claim 11, further comprising means disposed within the spacing between said opposing inner surfaces of said adjacent leg portions.
Claim 15
Dependent Claim
19 words
A bilateral heater unit according to claim 12, wherein said means disposed within the spacing includes an insulating means.
Claim 16
Dependent Claim
28 words
A bilateral heater unit according to claim 11, wherein said opposing inner surfaces of said spaced parallel adjacent leg portions have one of a planar and non-planar configuration.
Claim 17
Dependent Claim
21 words
A bilateral heater unit according to claim 11, wherein said non-planar configuration includes at least one of curved and V-shaped configurations.
Claim 18
Dependent Claim
53 words
A bilateral heater unit according to claim 11, further comprising a member to be heated having an opening in which said bilateral heater unit is disposed, and means inserted between the spaced parallel adjacent leg portions for biasing said leg portions into good heat conductive heat relationship with said member to be heated.
Claim 19
Dependent Claim
59 words
A bilateral heater unit according to claim 11, further comprising a member to be heated having an opening in which said bilateral heater unit is inserted, said member having a hollow portion adjacent the opening thereof, said bilateral heater unit being disposed in said opening with one of said leg portions proximate to said hollow portion of said member.
Claim 20
Dependent Claim
54 words
A bilateral heater unit according to claim 11, wherein said resistor assembly means includes resistive heating means and at least one electrically conductive member extending within said sheath along the portion thereof between said terminal means, said at least one electrically conductive member having a length sufficient for producing a non-heat generating zone thereat.
Claim 21
Dependent Claim
45 words
A bilateral heater unit according to claim 18, wherein said at least one electrically conductive member extends from one of said terminal means so as to provide a non-heat generating zone from terminal means along at least a portion of said one parallel leg portion.
Claim 22
Dependent Claim
23 words
A bilateral heater unit according to claim 18, wherein said non-heat generating zone is provided in the region of said return bend portion.
Claim 23
Dependent Claim
22 words
A bilateral heater unit according to claim 1, wherein said return bend portion includes a part having a substantially circular cross section.
Claim 24
Dependent Claim
25 words
A bilateral heater unit according to claim 2, wherein said electrically conductive member for providing a non-heat generating zone is integral with said terminal means.
Claim 25
Dependent Claim
32 words
A bilateral heater unit according to claim 2, wherein said electrically conductive member for providing a non-heat generating zone extends along at least the entire length of said one parallel leg portion.
Claim 26
Dependent Claim
25 words
A bilateral heater unit according to claim 19, wherein said electrically conductive member for providing a non-heat generating zone is integral with said terminal means.
Claim 27
Dependent Claim
32 words
A bilateral heater unit according to claim 19, wherein said electrically conductive member for providing a non-heat generating zone extends along at least the entire length of said one parallel leg portion.
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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) | 1981-11-13 | 1982-05-15 | 1982-11-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1985-11-13 | 1986-05-15 | 1986-11-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1989-11-13 | 1990-05-15 | 1990-11-14 | $7700.00 | Window Closed / Lapsed |