US3127764A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Concentric double aperture air nozzle
Assignee: G P E CONTROLS Inc
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Filing: 1961-09-18
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Granted: 1964-04-07
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Expires: 1981-09-18
Abstract
No abstract record available.
Inventors
- 👤 Earl B Hudson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 05:24
CPC Classifications
F; F15; F15B; F15B5/00; F15B5/003
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
147 words
AN IMPROVED PROXIMITY DETECTION APPARATUS FOR SENSING THE PROXIMITY OF A MATERIAL AGAINST WHICH SAID APPARATUS DIRECTS AN AIRSTREAM, COMPRISING IN COMBINATION: A FIRST MEMBER HAVING A THROUGH PASSAGEWAY, ONE END OF SAID PASSAGEWAY BEING ADAPTED TO BE CONNECTED TO A FIRST AIR SOURCE FOR SUPPLYING AIR AT A FIRST PRESSURE TO SAID PASSAGEWAY; A CHAMBER HAVING AN OPENING SURROUNDING THE OTHER END OF SAID PASSAGEWAY; A SECOND AIR SOURCE CONNECTED TO SUPPLY AIR TO SAID CHAMBER AT A SECOND PRESSURE GREATER THAN SAID FIRST PRESSURE; PRESSURE-DETECTING MEANS; AND A SECOND PASSAGEWAY HAVING ONE OF ITS ENDS CONNECTED WITH SAID THROUGH PASSAGEWAY BETWEEN THE ENDS OF SAID THROUGH PASSAGEWAY AND ITS OTHER END CONNECTED TO SAID PRESSURE-DETECTING MEANS, THEREBY TO ENABLE SAID PRESSURE-DETECTING MEANS TO DETECT VARIATION IN THE BACK PRESSURE IN SAID THROUGH PASSAGEWAY AS THE DISTANCE BETWEEN SAID MATERIAL AND SAID PROXIMITY DETECTION APPARATUS VARIES.
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) | 1967-04-07 | 1967-10-07 | 1968-04-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-04-07 | 1971-10-07 | 1972-04-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-04-07 | 1975-10-07 | 1976-04-07 | $7700.00 | Window Closed / Lapsed |