US3726466A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Brazing fixture
Assignee: Abar Ipsen Industries Inc
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Filing: 1971-05-28
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Granted: 1973-04-10
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Expires: 1991-05-28
Abstract
Abstract A fixture for holding a stack of workpieces in assembled relationship during furnace brazing of the workpieces by radiant heat. The fixture comprises upper and lower clamping plates adapted to be drawn together to clamp the workpieces. Fins made of highly heat conductive material project vertically from the plates and block the radiant heat directed horizontally across the plates, the fins conducting such heat into the plates to raise the temperature of the plates and promote uniform heating of the workpieces from top to bottom.
Inventors
- 👤 H Vedder
- 👤 E Byrnes
- 👤 R Rogers
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 11:52
CPC Classifications
B; B23; B23K; B23K1/00; B23K1/008; B23K1/0008; B23K1/0012; Y; Y10; Y10S; Y10S269/00; Y10S269/909; Y10T; Y10T29/00; Y10T29/49; Y10T29/4935; Y10T29/49373; Y10T29/53; Y10T29/53113; Y10T29/53961
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
162 words
A fixture for holding a stack of workpieces in assembled relation during furnace brazing of the workpieces by radiated heat, said fixture comprising a top clamping plate overlying the workpieces and a bottom clamping plAte underlying the workpieces, means interconnecting said plates and operable to draw the plates toward one another to clamp the workpieces between the plates, said plates being made of metal with sufficient thickness and rigidity to clamp the workpieces securely without being distorted, and fins made of a metal which is different from the metal of said plates and which is more highly heat conductive than the metal of said plates, said fins projecting upwardly from at least two opposite side edge portions of said top clamping plate and projecting downwardly from the corresponding side edge portions of said bottom clamping plate to block radiated heat directed across said plates whereby such heat is conducted edgewise through said fins and is conducted into said plates and said workpieces.
Claim 2
Dependent Claim
162 words
A fixture for holding a stack of workpieces in assembled relation during furnace brazing of the workpieces by radiated heat, said fixture comprising a top clamping plate overlying the workpieces and a bottom clamping plAte underlying the workpieces, means interconnecting said plates and operable to draw the plates toward one another to clamp the workpieces between the plates, said plates being made of metal with sufficient thickness and rigidity to clamp the workpieces securely without being distorted, and fins made of a metal which is different from the metal of said plates and which is more highly heat conductive than the metal of said plates, said fins projecting upwardly from at least two opposite side edge portions of said top clamping plate and projecting downwardly from the corresponding side edge portions of said bottom clamping plate to block radiated heat directed across said plates whereby such heat is conducted edgewise through said fins and is conducted into said plates and said workpieces.
Claim 3
Dependent Claim
53 words
A fixture as defined in claim 1 in which the fins on opposite side edge portions of each plate are the legs of a U-shaped member made of said highly heat conductive material and having a bridge which is sandwiched between the respective plate and the adjacent surface of the stack of workpieces.
Claim 4
Dependent Claim
21 words
A fixture as defined in claim 2 in which said fins extend continuously along the side edge portions of said plates.
Claim 5
Dependent Claim
32 words
A fixture as defined in claim 2 in which two fins are spaced from one another along each of said side edge portions and are located near the ends of said plates.
Claim 6
Dependent Claim
15 words
A fixture as defined in claim 1 in which said fins are made of copper.
Claim 7
Dependent Claim
16 words
A fixture as defined in claim 5 in which said plates are made of stainless steel.
Claim 8
Dependent Claim
234 words
A fixture for holding a stack of workpieces in assembled relation as the workpieces are brazed together in a furnace chamber having radiant heating elements located in generally vertical planes on two opposite sides of the workpieces to radiate heat horizontally toward the workpieces, said fixture comprising a top clamping plate overlying the workpieces and a bottom clamping plate underlying the workpieces, means interconnecting said plates and operable to draw the plates toward one another to clamp the workpieces between the plates, said plates being made of metal with sufficient thickness and rigidity to clamp the workpieces securely without being distorted, and fins made of a metal which is different from the metal of said plates and which is more highly heat conductive than the metal of said plates, said fins projecting upwardly from two opposite side edge portions of said top clamping plate and projecting downwardly from the corresponding side edge portions of said bottom clamping plate, and said fins facing said heating elements to block the heat radiated horizontally across the top of said top plate and across the bottom of said bottom plate by said elements, the fins on opposite edge portion of each plate being defined by the legs of a U-shaped member made of said highly heat conductive material and having a bridge which is sandwiched between the respective plate and the adjacent surface of the stack of workpieces.
Claim 9
Dependent Claim
234 words
A fixture for holding a stack of workpieces in assembled relation as the workpieces are brazed together in a furnace chamber having radiant heating elements located in generally vertical planes on two opposite sides of the workpieces to radiate heat horizontally toward the workpieces, said fixture comprising a top clamping plate overlying the workpieces and a bottom clamping plate underlying the workpieces, means interconnecting said plates and operable to draw the plates toward one another to clamp the workpieces between the plates, said plates being made of metal with sufficient thickness and rigidity to clamp the workpieces securely without being distorted, and fins made of a metal which is different from the metal of said plates and which is more highly heat conductive than the metal of said plates, said fins projecting upwardly from two opposite side edge portions of said top clamping plate and projecting downwardly from the corresponding side edge portions of said bottom clamping plate, and said fins facing said heating elements to block the heat radiated horizontally across the top of said top plate and across the bottom of said bottom plate by said elements, the fins on opposite edge portion of each plate being defined by the legs of a U-shaped member made of said highly heat conductive material and having a bridge which is sandwiched between the respective plate and the adjacent surface of the stack of workpieces.
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) | 1976-04-09 | 1976-10-09 | 1977-04-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-04-09 | 1980-10-09 | 1981-04-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-04-09 | 1984-10-09 | 1985-04-10 | $7700.00 | Window Closed / Lapsed |