US3141334A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Pressure detecting instrument
Assignee: Bendix Corp
•
Filing: 1960-10-14
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Granted: 1964-07-21
•
Expires: 1980-10-14
Abstract
No abstract record available.
Inventors
- 👤 Donald F Hastings
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 16:53
CPC Classifications
G; G01; G01L; G01L9/00; G01L13/00; G01L13/02; G01L13/023
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
171 words
IN A PRESSURE DIFFERENTIAL INDICATING DEVICE, A HERMETICALLY SEALED CASING, A PAIR OF EXPANSIBLE CHAMBER MEANS IN SAID CASING AND EXTERNALLY SUBJECTED TO THE PRESSURE WITHIN THE CASING, MEANS CONNECTING THE INTERIORS OF SAID CHAMBER MEANS TO DIFFERENT SOURCES OF FLUID PRESSURE, A SUBSTANTIALLY RIGID, TORSIONALLY-RESILIENT BAR FIXEDLY SECURED ADJACENT EACH END THEREOF, LEVER MEANS SECURED TO SAID BAR INTERMEDIATE THE ENDS OF THE LATTER, WHEREBY SAID BAR RESILIENTLY RESISTS ANGULAR MOVEMENT OF THE LEVER MEANS ABOUT THE AXIS OF THE BAR IN EITHER DIRECTION FROM A NULL POSITION DETERMINED BY THE RELAXED POSITION OF THE BAR, MEANS FOR OPERATIVELY SO CONNECTING SAID PAIR OF CHAMBER MEANS TO SAID LEVER MEANS THAT FLUID PRESSURE WITHIN ONE OF SAID CHAMBER MEANS TENDS TO TWIST SAID BAR IN ONE DIRECTION ABOUT ITS AXIS AND PRESSURE WITHIN THE OTHER CHAMBER MEANS SIMULTANEOUSLY TENDS TO TWIST SAID BAR IN THE OPPOSITE DIRECTION, WHEREBY THE BAR IS SUBJECTED TO A TORQUE DETERMINED BY THE DIFFERENTIAL BETWEEN THE PRESSURES WITHIN SAID PAIR OF CHAMBER MEANS, A SYN-
Claim 2
Dependent Claim
171 words
IN A PRESSURE DIFFERENTIAL INDICATING DEVICE, A HERMETICALLY SEALED CASING, A PAIR OF EXPANSIBLE CHAMBER MEANS IN SAID CASING AND EXTERNALLY SUBJECTED TO THE PRESSURE WITHIN THE CASING, MEANS CONNECTING THE INTERIORS OF SAID CHAMBER MEANS TO DIFFERENT SOURCES OF FLUID PRESSURE, A SUBSTANTIALLY RIGID, TORSIONALLY-RESILIENT BAR FIXEDLY SECURED ADJACENT EACH END THEREOF, LEVER MEANS SECURED TO SAID BAR INTERMEDIATE THE ENDS OF THE LATTER, WHEREBY SAID BAR RESILIENTLY RESISTS ANGULAR MOVEMENT OF THE LEVER MEANS ABOUT THE AXIS OF THE BAR IN EITHER DIRECTION FROM A NULL POSITION DETERMINED BY THE RELAXED POSITION OF THE BAR, MEANS FOR OPERATIVELY SO CONNECTING SAID PAIR OF CHAMBER MEANS TO SAID LEVER MEANS THAT FLUID PRESSURE WITHIN ONE OF SAID CHAMBER MEANS TENDS TO TWIST SAID BAR IN ONE DIRECTION ABOUT ITS AXIS AND PRESSURE WITHIN THE OTHER CHAMBER MEANS SIMULTANEOUSLY TENDS TO TWIST SAID BAR IN THE OPPOSITE DIRECTION, WHEREBY THE BAR IS SUBJECTED TO A TORQUE DETERMINED BY THE DIFFERENTIAL BETWEEN THE PRESSURES WITHIN SAID PAIR OF CHAMBER MEANS, A SYN-
References Cited (Backward Citations)
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US2625820A
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US2788664A
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US2816444A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1967-07-21 | 1968-01-20 | 1968-07-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-07-21 | 1972-01-20 | 1972-07-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-07-21 | 1976-01-20 | 1976-07-21 | $7700.00 | Window Closed / Lapsed |