US3590206A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Flexible electric tube brazing furnace
Assignee: Eaton Aeroquip LLC
•
Filing: 1970-02-05
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Granted: 1971-06-29
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Expires: 1990-02-05
Abstract
Abstract A portable tube brazing furnace using resistance heating and incorporating means for surrounding the joint with inert gas. The furnace comprises a pair of spaced parallel link chains with ceramic rods extending therebetween and carrying the heating elements. An insulative cover is carried by the chains, and the entire unit is clamped around the joint. Combined electrical and gas conducting tubers extend into the furnace so that inert gas may surround the joint during brazing.
Inventors
- 👤 Ernest T Lago
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 07:24
CPC Classifications
B; B23; B23K; B23K1/00; B23K1/008
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
69 words
In a portable electrical resistance tube brazing furnace, a pair of spaced parallel link chains, insulative rods extending between said chains, heating coils mounted on said rods, a plurality of terminals extending from one of said chains and connected to said coils, insulative material surrounding and extending between said chains outwardly of said rods, and means for clamping said furnace in position wrapped around a joint to be brazed.
Claim 2
Dependent Claim
69 words
In a portable electrical resistance tube brazing furnace, a pair of spaced parallel link chains, insulative rods extending between said chains, heating coils mounted on said rods, a plurality of terminals extending from one of said chains and connected to said coils, insulative material surrounding and extending between said chains outwardly of said rods, and means for clamping said furnace in position wrapped around a joint to be brazed.
Claim 3
Dependent Claim
26 words
The combination according to claim 1, said terminals being hollow and adapted to carry inert gas to the annular chamber formed between said coils and joint.
Claim 4
Dependent Claim
31 words
The combination according to claim 1, said rods being formed of ceramic material, one of the rods being hollow and adapted to receive a thermocouple for controlling the furnace power supply.
Claim 5
Dependent Claim
31 words
The combination according to claim 3, each of said link chains having an inner and outer pair of links connected by hinge pins, said rods passing through the inner links thereof.
Claim 6
Dependent Claim
31 words
The combination according to claim 1, each of said link chains having an inner and outer pair of links connected by hinge pins, said rods passing through the inneR links thereof.
Claim 7
Dependent Claim
45 words
The combination according to claim 1, further provided with an asbestos cover surrounding said insulative material, hinge pins connecting inner and outer links of each of said chains, and washers held by the outer ends of said hinge pins and securing said cover in position.
Claim 8
Dependent Claim
32 words
The combination according to claim 1, each of said link chains having inner and outer links, corresponding links of both chains being connected by a rod secured to the outer edges thereof.
Claim 9
Dependent Claim
28 words
The combination according to claim 1, said clamping means comprising a pair of clamping posts extending outwardly from said furnace and adapted to be drawn together by clamps.
Claim 10
Dependent Claim
16 words
The combination according to claim 8, further provided with an asbestos cover surrounding said insulative material.
Claim 11
Dependent Claim
30 words
The combination according to claim 9, each of said link chains having an inner and outer pair of links connected by hinge pins, said rods passing through inner links thereof.
References Cited (Backward Citations)
US2722597A
Cited
US3353005A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-06-28 | 1974-12-28 | 1975-06-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-06-28 | 1978-12-28 | 1979-06-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-06-28 | 1982-12-28 | 1983-06-29 | $7700.00 | Window Closed / Lapsed |