Patent US3279250A successfully refreshed from Google Patents.
US3279250A
Expired / Lapsed
US
⏱️ 0.0 years remaining
High-low airspeed indicator
Assignee: Kollsman Instrument Corp
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Filing: 1963-11-26
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Granted: 1966-10-18
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Expires: 1983-11-26
Abstract
No abstract record available.
Inventors
- 👤 Hezel Herman
- 👤 Heinrich E Barthel
- 👤 Walter H Rath
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 13:54
CPC Classifications
G; G01; G01P; G01P5/00; G01P5/14
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
155 words
AN AIRSPEED INDICATOR COMPRISING A FIRST PRESSURE RESPONSIVE CAPSULE, A SECOND PRESSURE RESPONSIVE CAPSULE, AND AN INDICATOR MEANS; SAID FIRST PRESURE RESPONSIVE CAPSULE BEING OPERABLE IN A LOW AIRSPEED RANGE; SAID SECOND PRESSURE RESPONSIVE CAPSULE BEING OPERABLE IN A HIGH SPEED RANGE; AND CONNECTION MEANS FOR CONNECTING SAID FIRST AND SECOND PRESSURE RESPONSIVE CAPABLE TO SAID INDICATOR MEANS; SAID AIRSPEED INDICATOR BEING CONNECTABLE TO A SOURCE OF STATIC PRESSURE AND A SOURCE OF PITOT PRESSURE; SAID SOURCE OF STATIC PRESSURE BEING CONNECTED TO THE INTERIOR OF SAID FIRST PRESSURE RESPONSIVE CAPSULE; SAID SOURCE OF PITOT PRESSURE BEING CONNECTED TO THE EXTERIOR OF SAID FIRST PRESSURE RESPONSIVE CAPSULE; THE DIFFERENTIAL OF STATIC TO PITOT PRESSURE BEING CONNECTED ACROSS SAID SECOND PRESSURE RESPONSIVE CAPSULE; SAID CONNECTING MEANS INCLUDING FIRST CONNECTING MEANS EXTENDING FROM SAID FIRST PRESSURE RESPONSIVE CAPSULE TO SAID INDICATOR MEANS AND SECOND CONNECTING MEANS EXTENDING FROM SAID SECOND PRESSURE RESPONSIVE CAPSULE TO SAID INDICATING MEANS,
Claim 2
Dependent Claim
155 words
AN AIRSPEED INDICATOR COMPRISING A FIRST PRESSURE RESPONSIVE CAPSULE, A SECOND PRESSURE RESPONSIVE CAPSULE, AND AN INDICATOR MEANS; SAID FIRST PRESURE RESPONSIVE CAPSULE BEING OPERABLE IN A LOW AIRSPEED RANGE; SAID SECOND PRESSURE RESPONSIVE CAPSULE BEING OPERABLE IN A HIGH SPEED RANGE; AND CONNECTION MEANS FOR CONNECTING SAID FIRST AND SECOND PRESSURE RESPONSIVE CAPABLE TO SAID INDICATOR MEANS; SAID AIRSPEED INDICATOR BEING CONNECTABLE TO A SOURCE OF STATIC PRESSURE AND A SOURCE OF PITOT PRESSURE; SAID SOURCE OF STATIC PRESSURE BEING CONNECTED TO THE INTERIOR OF SAID FIRST PRESSURE RESPONSIVE CAPSULE; SAID SOURCE OF PITOT PRESSURE BEING CONNECTED TO THE EXTERIOR OF SAID FIRST PRESSURE RESPONSIVE CAPSULE; THE DIFFERENTIAL OF STATIC TO PITOT PRESSURE BEING CONNECTED ACROSS SAID SECOND PRESSURE RESPONSIVE CAPSULE; SAID CONNECTING MEANS INCLUDING FIRST CONNECTING MEANS EXTENDING FROM SAID FIRST PRESSURE RESPONSIVE CAPSULE TO SAID INDICATOR MEANS AND SECOND CONNECTING MEANS EXTENDING FROM SAID SECOND PRESSURE RESPONSIVE CAPSULE TO SAID INDICATING MEANS,
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) | 1969-10-17 | 1970-04-18 | 1970-10-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-10-17 | 1974-04-18 | 1974-10-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-10-17 | 1978-04-18 | 1978-10-18 | $7700.00 | Window Closed / Lapsed |