US3369404A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Percent rate of change pressure sensor
Assignee: RTX Corp
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Filing: 1966-07-01
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Granted: 1968-02-20
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Expires: 1986-07-01
Abstract
No abstract record available.
Inventors
- 👤 Bartholomew J Davison
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 10:22
CPC Classifications
G; G01; G01L; G01L15/00
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
165 words
A PERCENT RATE OF CHANGE PRESSURE SENSOR INCLUDING: A CASING DEFINING A CHAMBER HAVING A FLUID THEREIN, SAID CASING HAVING FIRST AND SECOND ORIFICES THEREIN, THE AREA OF SAID FIRST ORIFICE BEING GREATER THAN THE AREA OF SAID SECOND ORIFICE, SAID SECOND ORIFICE COMMUNICATING WITH THE FLUID IN SAID CHAMBER; FIRST PRESSURE RESPONSIVE MEANS IN SAID CHAMBER COMMUNICATING WITH SAID FIRST ORIFICE AND BEING EXPOSED TO THE FLUID IN SAID CHAMBER; MEANS FOR DELIVERING A PRESSURIZED FLUID OF VARIABLE PRESSURE TO SAID FIRST AND SECOND ORIFICES TO GENERATE A FORCE FROM SAID FROM PRESSURE RESPONSIVE MEANS PROPORTIONAL TO THE RATE OF CHANGE OF PRESSURE OF SAID PRESSURIZED FLUID; FLUID SPRING MEANS IN SAID CHAMBER FOR GENERATING A SPRING RATE PROPORTIONAL TO THE STEADY STATE PRESSURE OF SAID PRESSURIZED FLUID; AND OUTPUT MEANS CONNECTED TO RECEIVE FORCE SIGNALS FROM SAID FIRST PRESSURE RESPONSIVE MEANS AND SAID FLUID SPRING MEANS TO GENERATE A SIGNAL COMMENSURATE WITH THE PERCENT RATE OF CHANGE OF PRESSURE OF SAID PRESURIZED FLUID.
Claim 2
Dependent Claim
165 words
A PERCENT RATE OF CHANGE PRESSURE SENSOR INCLUDING: A CASING DEFINING A CHAMBER HAVING A FLUID THEREIN, SAID CASING HAVING FIRST AND SECOND ORIFICES THEREIN, THE AREA OF SAID FIRST ORIFICE BEING GREATER THAN THE AREA OF SAID SECOND ORIFICE, SAID SECOND ORIFICE COMMUNICATING WITH THE FLUID IN SAID CHAMBER; FIRST PRESSURE RESPONSIVE MEANS IN SAID CHAMBER COMMUNICATING WITH SAID FIRST ORIFICE AND BEING EXPOSED TO THE FLUID IN SAID CHAMBER; MEANS FOR DELIVERING A PRESSURIZED FLUID OF VARIABLE PRESSURE TO SAID FIRST AND SECOND ORIFICES TO GENERATE A FORCE FROM SAID FROM PRESSURE RESPONSIVE MEANS PROPORTIONAL TO THE RATE OF CHANGE OF PRESSURE OF SAID PRESSURIZED FLUID; FLUID SPRING MEANS IN SAID CHAMBER FOR GENERATING A SPRING RATE PROPORTIONAL TO THE STEADY STATE PRESSURE OF SAID PRESSURIZED FLUID; AND OUTPUT MEANS CONNECTED TO RECEIVE FORCE SIGNALS FROM SAID FIRST PRESSURE RESPONSIVE MEANS AND SAID FLUID SPRING MEANS TO GENERATE A SIGNAL COMMENSURATE WITH THE PERCENT RATE OF CHANGE OF PRESSURE OF SAID PRESURIZED FLUID.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1971-02-19 | 1971-08-21 | 1972-02-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-02-19 | 1975-08-21 | 1976-02-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-02-19 | 1979-08-21 | 1980-02-20 | $7700.00 | Window Closed / Lapsed |