Patent US4136444A successfully refreshed from Google Patents.
US4136444A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Semiautomatic solid chip removal apparatus
Assignee: Unisys Corp
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Filing: 1977-06-06
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Granted: 1979-01-30
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Expires: 1997-06-06
Abstract
Abstract The present invention relates to portable, semiautomatic apparatus for aligning and removing solid state multicontact electrical circuit devices, e.g. DIP (dual-in-line package) chips from printed circuit panels or boards so as to prepare the board for new or replacement chip insertion and soldering.
Inventors
- 👤 David J. Durney
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 22:28
CPC Classifications
H; H05; H05K; H05K13/00; H05K13/04; H05K13/0486; Y; Y10; Y10T; Y10T29/00; Y10T29/53; Y10T29/53274; Y10T29/53283
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
164 words
Portable semiautomatic apparatus for removing dual-in-line solid state chip packages from associated hardware such for example as a printed circuit board comprising: a frame member providing a support for said apparatus, first heater means carried by said support providing an anvil for supporting a printed circuit board thereon, second heater means arranged to straddle said associated means for moving said second heater means toward and away from said first heater means, means movable relative to said first and second heater means for mounting a chip holding and extracting member thereon, means for electrically energizing said heater means so as to release said chip from said printed circuit board, and means for driving said chip holding and extracting member in one direction to lower said chip carrying tool toward said first heater means and said printed circuit board and for moving said chip carrying tool in the opposite direction to pull said released chip out away from said printed circuit board upon its release therefrom.
Claim 2
Dependent Claim
164 words
Portable semiautomatic apparatus for removing dual-in-line solid state chip packages from associated hardware such for example as a printed circuit board comprising: a frame member providing a support for said apparatus, first heater means carried by said support providing an anvil for supporting a printed circuit board thereon, second heater means arranged to straddle said associated means for moving said second heater means toward and away from said first heater means, means movable relative to said first and second heater means for mounting a chip holding and extracting member thereon, means for electrically energizing said heater means so as to release said chip from said printed circuit board, and means for driving said chip holding and extracting member in one direction to lower said chip carrying tool toward said first heater means and said printed circuit board and for moving said chip carrying tool in the opposite direction to pull said released chip out away from said printed circuit board upon its release therefrom.
Claim 3
Dependent Claim
27 words
The invention in accordance with claim 1 wherein said frame member is substantially U-shaped with said heater members disposed at the terminal open ends of the U.
Claim 4
Dependent Claim
25 words
The invention in accordance with claim 1 wherein said first heater means further includes a thermostatic control for regulating the temperature of said heater means.
Claim 5
Dependent Claim
28 words
The invention in accordance with claim 1 wherein said second heater means includes means for laterally adjusting the spacing between heater elements relative to said first heater means.
Claim 6
Dependent Claim
33 words
The invention in accordance with claim 1 wherein said chip holding and extracting member comprises a demountable tool having movable clamping means engaging a DIP chip and slidably received on said mounting means.
Claim 7
Dependent Claim
40 words
The invention in accordance with claim 1 wherein said means for energizing said heater means further includes means for varying the level of applied heat and for visually indicating to the operator that the prescribed heat level has been attained.
Claim 8
Dependent Claim
68 words
The invention in accordance with claim 1 wherein said means for driving said chip holding and extracting member comprises a spring for storing energy, a latch coupled to said spring and said chip holding and extracting member and a quick release means engaging said spring for releasing said stored energy so as to move the chip from the printed circuit board after the release temperature has been attained.
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) | 1982-01-29 | 1982-07-31 | 1983-01-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1986-01-29 | 1986-07-31 | 1987-01-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1990-01-29 | 1990-07-31 | 1991-01-30 | $7700.00 | Window Closed / Lapsed |