Patent US3138072A successfully refreshed from Google Patents.
US3138072A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Dynamically variable orifice for load damping
Assignee: Bell Aerospace Corp
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Filing: 1963-02-07
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Granted: 1964-06-23
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Expires: 1983-02-07
Abstract
No abstract record available.
Inventors
- 👤 Samuel A Gray
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 17:46
CPC Classifications
F; F15; F15B; F15B13/00; F15B13/16; F16; F16F; F16F15/00; F16F15/02; F16F15/023; F16F15/027
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
174 words
A DYNAMICALLY VARIABLE ORIFICE FOR DAMPING FLUID PRESSURE CHANGES APPLIED FROM A VALVE TO A LOAD DEVICE, SAID ORIFICE COMPRISING: FIRST AND SECOND PASSAGEWAYS COMMUNICATING BETWEEN A VALVE AND A LOAD DEVICE FOR APPLYING FLUID PRESSURE FROM SAID VALVE TO SAID LOAD DEVICE; FIRST MEANS MOVABLE IN RESPONSE TO ANY DIFFERENCE IN FLUID PRESSURE BETWEEN SAID FIRST AND SECOND PASSAGEWAYS; SECOND MEANS MOVABLE ONLY IN RESPONSE TO CHANGES IN FLUID PRESSURE BETWEEN SAID FIRST AND SECOND PASSAGEWAYS; A BYPASS PASSAGEWAY COMMUNICATING WITH SAID FIRST AND SECOND PASSAGEWAYS FOR DIVERTING FLUID PRESSURE FROM SAID LOAD DEVICE, SAID BYPASS PASSAGEWAY BEING CLOSED BY SAID SECOND MEANS DURING STEADY STATE APPLICATION OF PRESSURE TO SAID LOAD DEVICE; AND DIFFERENTIATING MEANS COMMUNICATING WITH SAID FIRST AND SECOND MEANS FOR MOVING SAID SECOND MEANS ONLY IN RESPONSE TO CHANGES IN FLUID PRESSURE BETWEEN SAID FIRST AND SECOND PASSAGEWAYS THEREBY TO OPEN SAID BYPASS PASSAGEWAY BY AN AMOUNT PROPORTIONAL TO THE RATE OF CHANGE OF SAID FLUID PRESSURE AND DIVERT A PORTION OF SAID FLUID PRESSURE FROM SAID LOAD DEVICE.
Claim 2
Dependent Claim
174 words
A DYNAMICALLY VARIABLE ORIFICE FOR DAMPING FLUID PRESSURE CHANGES APPLIED FROM A VALVE TO A LOAD DEVICE, SAID ORIFICE COMPRISING: FIRST AND SECOND PASSAGEWAYS COMMUNICATING BETWEEN A VALVE AND A LOAD DEVICE FOR APPLYING FLUID PRESSURE FROM SAID VALVE TO SAID LOAD DEVICE; FIRST MEANS MOVABLE IN RESPONSE TO ANY DIFFERENCE IN FLUID PRESSURE BETWEEN SAID FIRST AND SECOND PASSAGEWAYS; SECOND MEANS MOVABLE ONLY IN RESPONSE TO CHANGES IN FLUID PRESSURE BETWEEN SAID FIRST AND SECOND PASSAGEWAYS; A BYPASS PASSAGEWAY COMMUNICATING WITH SAID FIRST AND SECOND PASSAGEWAYS FOR DIVERTING FLUID PRESSURE FROM SAID LOAD DEVICE, SAID BYPASS PASSAGEWAY BEING CLOSED BY SAID SECOND MEANS DURING STEADY STATE APPLICATION OF PRESSURE TO SAID LOAD DEVICE; AND DIFFERENTIATING MEANS COMMUNICATING WITH SAID FIRST AND SECOND MEANS FOR MOVING SAID SECOND MEANS ONLY IN RESPONSE TO CHANGES IN FLUID PRESSURE BETWEEN SAID FIRST AND SECOND PASSAGEWAYS THEREBY TO OPEN SAID BYPASS PASSAGEWAY BY AN AMOUNT PROPORTIONAL TO THE RATE OF CHANGE OF SAID FLUID PRESSURE AND DIVERT A PORTION OF SAID FLUID PRESSURE FROM SAID LOAD DEVICE.
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) | 1967-06-23 | 1967-12-23 | 1968-06-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-06-23 | 1971-12-23 | 1972-06-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-06-23 | 1975-12-23 | 1976-06-23 | $7700.00 | Window Closed / Lapsed |