Patent US4506820A successfully refreshed from Google Patents.
US4506820A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Desoldering device
Assignee: Individual
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Filing: 1983-07-29
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Granted: 1985-03-26
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Expires: 2003-07-29
Abstract
Abstract An apparatus for desoldering and soldering multipin components to or from printed circuit boards is described. A shallow large area solder pot, surrounded by a recessed area to catch overflow, in combination with a flexible mask is used to apply molten solder to a selected area of a printed circuit board to desolder or solder a selected device.
Inventors
- 👤 John P. Brucker
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 19:26
CPC Classifications
H; H05; H05K; H05K3/00; H05K3/30; H05K3/32; H05K3/34; H05K3/3452; B; B23; B23K; B23K3/00; B23K3/06; B23K3/0646; H05K13/00; H05K13/04; H05K13/0486; H05K2203/00; H05K2203/05; H05K2203/0548; H05K2203/0557; H05K3/3447; H05K3/3465; H05K3/3468
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
44 words
An apparatus for removing or replacing multipin devices in printed circuit boards comprising a solder pot, molten solder and flexible mask means; said flexible mask means fabricated with at least one precut hole or slot to expose the pins of the device being removed.
Claim 2
Independent Claim
44 words
An apparatus for removing or replacing multipin devices in printed circuit boards comprising a solder pot, molten solder and flexible mask means; said flexible mask means fabricated with at least one precut hole or slot to expose the pins of the device being removed.
Claim 3
Dependent Claim
15 words
The apparatus of claim 1 wherein said flexible mask means is made of TEFLON sheet.
Claim 4
Dependent Claim
21 words
The apparatus of claim 1 wherein said solder pot is fabricated with a recessed area sorrounding the area of molten solder.
Claim 5
Dependent Claim
54 words
The apparatus of claim 1 wherein said solder pot is fabricated with a recessed area sorrounding the area of molten solder; notches are located on the sides of the recessed area; and the flexible mask means has notches cut in its sides to coincide with the notches on the sides of the recessed area.
Claim 6
Independent Claim
61 words
An apparatus for removing or replacing multipin devices in printed circuit boards comprising a solder pot; molten solder; and a flexible mask means, said flexible mask means fabricated with at least one precut hole or slot to expose the pins of the device being removed, and with means for attaching said mask to the under side of said printed circuit board.
Claim 7
Independent Claim
61 words
An apparatus for removing or replacing multipin devices in printed circuit boards comprising a solder pot; molten solder; and a flexible mask means, said flexible mask means fabricated with at least one precut hole or slot to expose the pins of the device being removed, and with means for attaching said mask to the under side of said printed circuit board.
Claim 8
Independent Claim
72 words
An apparatus for removing or replacing multipin devices in printed circuit boards comprising a ceramic base formed with a cavity for a heater; a heater with a flat plate placed inside said heater cavity; a flexible mask means cut with at least one hole; and solder melted on the exposed surface of said flat plate with sufficient depth to form a meniscus above the top surface of the walls of said cavity.
Claim 9
Independent Claim
72 words
An apparatus for removing or replacing multipin devices in printed circuit boards comprising a ceramic base formed with a cavity for a heater; a heater with a flat plate placed inside said heater cavity; a flexible mask means cut with at least one hole; and solder melted on the exposed surface of said flat plate with sufficient depth to form a meniscus above the top surface of the walls of said cavity.
Claim 10
Dependent Claim
23 words
The apparatus of claim 6 wherein the ceramic base is also formed with a recessed area sorrounding the perimeter of said heater cavity.
Claim 11
Dependent Claim
24 words
The apparatus of claim 6 wherein the flexible mask means is made of TEFLON sheet in the range of 0.002 to 0.007 inch thick.
Claim 12
Dependent Claim
36 words
The apparatus of claim 6 wherein the heater cavity has space and provision for the installation of a thermostat and a thermostat is included to maintain the temperature of the molten solder within fixed preset limits.
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) | 1988-03-25 | 1988-09-24 | 1989-03-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1992-03-25 | 1992-09-24 | 1993-03-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1996-03-25 | 1996-09-24 | 1997-03-26 | $7700.00 | Window Closed / Lapsed |