US4412641A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Desoldering apparatus
Assignee: ERSA ERNST SACHS GmbH and Co KG
•
Filing: 1981-09-14
•
Granted: 1983-11-01
•
Expires: 2001-09-14
Abstract
Abstract A device for desoldering electronic components from circuit boards has a soldering nozzle which produces a solder wave that is directed from below the circuit board against the component to be desoldered; thereby dissolving previous solder bonds. The component can then be lifted out from above and suction is applied from below to the now-opened bores of the circuit board, to remove residual solder from them. A new component can then be installed, using the same equipment.
Inventors
- 👤 Gottfried Fuchs
- 👤 Ewald Garrecht
- 👤 Lothar Rieck
- 👤 Wolfgang Ruppel
- 👤 Rudolf Schwarz
- 👤 Erich Siegle
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 11:54
CPC Classifications
B; B23; B23K; B23K1/00; B23K1/018; B23K3/00; B23K3/06; B23K3/0646; B23K3/0653; B23K3/0669; H; H05; H05K; H05K3/00; H05K3/30; H05K3/32; H05K3/34; H05K3/3447; H05K3/3465; H05K3/3468
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
101 words
Apparatus for desoldering electronic components from conductor boards, including a solder nozzle at the lower side of the conductor board and an arrangement for the removal of residual solder from the bores of the conductor board, comprising in combination: a second means defining a sub-atmospheric pressure space at the lower side of the conductor board; means accommodated to the dimensions of the component to be desoldered and removably defining an inlet opening to the sub-atmospheric pressure space; and opening means in the second means forming a delimitation for a solder wave issuing from said solder nozzle from below the second means.
Claim 2
Dependent Claim
101 words
Apparatus for desoldering electronic components from conductor boards, including a solder nozzle at the lower side of the conductor board and an arrangement for the removal of residual solder from the bores of the conductor board, comprising in combination: a second means defining a sub-atmospheric pressure space at the lower side of the conductor board; means accommodated to the dimensions of the component to be desoldered and removably defining an inlet opening to the sub-atmospheric pressure space; and opening means in the second means forming a delimitation for a solder wave issuing from said solder nozzle from below the second means.
Claim 3
Dependent Claim
51 words
Apparatus according to claim 1, wherein said sub-atmospheric pressure space is defined by a soldering device with said solder nozzle for producing said soldering wave, and a mask frame accommodating the second means spaced from the solder nozzle tightly seated upon the same and provided with an arrangement for producing under-pressure.
Claim 4
Dependent Claim
38 words
Apparatus according to claim 2, wherein said mask frame is mounted to be raised and lowered, and has an opening for a mask insert which is removable and in turn is capable of removably accommodating the second means.
Claim 5
Dependent Claim
18 words
Apparatus according to claim 3, wherein said second-mentioned means is composed of steel having a soft-iron wall surface.
Claim 6
Dependent Claim
17 words
Apparatus according to claim 3, wherein said mask frame and said mask insert are of epoxy resin.
Claim 7
Dependent Claim
32 words
Apparatus according to claim 3; and further comprising above said marking insert a marking projector for directing against the component to be desoldered a picture thereof so as to mark said component.
References Cited (Backward Citations)
US3948212A
Cited
US3815806A
Cited
US3834605A
Cited
US4066204A
Cited
US4187973A
Cited
US4162034A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1986-10-31 | 1987-05-02 | 1987-11-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1990-10-31 | 1991-05-02 | 1991-11-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1994-10-31 | 1995-05-02 | 1995-11-01 | $7700.00 | Window Closed / Lapsed |