Patent US3999795A successfully refreshed from Google Patents.
US3999795A
Expired / Lapsed
US
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Vacuum pad system
Assignee: FKI Industries Inc
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Filing: 1975-12-17
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Granted: 1976-12-28
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Expires: 1995-12-17
Abstract
Abstract A vacuum pad system comprising a plurality of vacuum pads to which vacuum is selectively supplied and a de-icer supply mechanism selectively connected to the vacuum pads to supply de-icer to the pads and thereby to purge the pads.
Inventors
- 👤 Loren B. Barker
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 16:00
CPC Classifications
B; B66; B66C; B66C1/00; B66C1/02; B66C1/0256; B66C1/0212; B66C1/0237; B66C1/0243
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
47 words
In a vacuum pad system, the combination comprising at least one vacuum pad, means for supplying vacuum to said pad, means for supplying a de-icer fluid to said pad, and means for selectively connecting said vacuum supplying means and said de-icer fluid supplying means to said pad.
Claim 2
Dependent Claim
47 words
In a vacuum pad system, the combination comprising at least one vacuum pad, means for supplying vacuum to said pad, means for supplying a de-icer fluid to said pad, and means for selectively connecting said vacuum supplying means and said de-icer fluid supplying means to said pad.
Claim 3
Dependent Claim
62 words
The combination set forth in claim 1 wherein said means for supplying de-icer fluid to said pad comprises a compressor which has an output for passing air to said pad, an injector in series with said compressor output such that when said compressor output is connected to said pad, said injector will inject de-icer fluid into said air passing to said pad.
Claim 4
Dependent Claim
30 words
The combination set forth in claim 1 wherein said means for selectively connecting said vacuum supplying means and said de-icer fluid supplying means to said pad comprises a three-way valve.
Claim 5
Dependent Claim
56 words
The combination set forth in claim 1 wherein said means for selectively connecting said vacuum supplying means and said de-icer fluid supplying means to said pad comprises a two-way valve to which said vacuum supplying means and said de-icer fluid supplying means are connected and an on-off valve interposed between said pad and said two-way valve.
Claim 6
Independent Claim
30 words
The method of operating a vacuum pad system which comprises periodically interrupting the application of vacuum to the vacuum pads and directing de-icer fluid under pressure through said vacuum pads.
Claim 7
Independent Claim
30 words
The method of operating a vacuum pad system which comprises periodically interrupting the application of vacuum to the vacuum pads and directing de-icer fluid under pressure through said vacuum pads.
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) | 1979-12-28 | 1980-06-28 | 1980-12-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1983-12-28 | 1984-06-28 | 1984-12-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1987-12-28 | 1988-06-28 | 1988-12-28 | $7700.00 | Window Closed / Lapsed |