US3137309A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Frictionless zero spring rate seal
Assignee: LINK DIVISION GENERAL PREC Inc
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Filing: 1962-04-30
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Granted: 1964-06-16
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Expires: 1982-04-30
Abstract
No abstract record available.
Inventors
- 👤 Blase William Walter
- 👤 James H Kogen
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 09:52
CPC Classifications
F; F15; F15B; F15B9/00; F15B9/02; F15B9/06; F16; F16F; F16F6/00; Y; Y10; Y10T; Y10T137/00; Y10T137/206; Y10T137/218; Y10T137/2202; Y10T137/2213; Y10T137/2278; Y10T137/2322
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
148 words
A JET-PIPE HYDRAULIC AMPLIFIER, COMPRISING, IN COMBINATION: A BODY DEFINING AN ENCLOSED CAVITY AND HAVING A PAIR OF RECEIVER PORTS SPACED IN A WALL THEREOF; A JET PIPE CONNECTED TO A FLUID PRESSURE SOURCE AND ADAPTED TO EXPEL FLUID TOWARD SAID RECEIVER PORTS, SAID JET PIPE BEING MOUNTED WITHIN SAID CAVITY AND PIVOTALLY ATTACHED TO SAID BODY BY FLEXIBLE SUSPENSION MEANS; MEANS FOR APPLYING AN INPUT SIGNAL FORCE TO SAID JET PIPE TENDING TO PIVOT SAID JET PIPE AGAINST RESTRAINING FORCES DEVELOPED BY SAID SUSPENSION MEANS; AN ARMATURE OF MAGNETIC MATERIAL RIGIDLY ATTACHED TO SAID JET PIPE; AND A PAIR OF MUTUALLY OPPOSING MAGNETIC MEANS SPACED ON OPPOSITE SIDES OF SAID ARMATURE TO APPLY OPPOSING FORCES TO SAID ARMATURE TO TEND TO ROTATE SAID JET PIPE FROM A REFERENCE POSITION OF UNSTABLE EQUILIBRIUM PRODUCED BY APPLICATION OF SAID OPPOSING FORCES TO SAID JET PIPE BY SAID MAGNETIC MEANS.
Claim 2
Dependent Claim
148 words
A JET-PIPE HYDRAULIC AMPLIFIER, COMPRISING, IN COMBINATION: A BODY DEFINING AN ENCLOSED CAVITY AND HAVING A PAIR OF RECEIVER PORTS SPACED IN A WALL THEREOF; A JET PIPE CONNECTED TO A FLUID PRESSURE SOURCE AND ADAPTED TO EXPEL FLUID TOWARD SAID RECEIVER PORTS, SAID JET PIPE BEING MOUNTED WITHIN SAID CAVITY AND PIVOTALLY ATTACHED TO SAID BODY BY FLEXIBLE SUSPENSION MEANS; MEANS FOR APPLYING AN INPUT SIGNAL FORCE TO SAID JET PIPE TENDING TO PIVOT SAID JET PIPE AGAINST RESTRAINING FORCES DEVELOPED BY SAID SUSPENSION MEANS; AN ARMATURE OF MAGNETIC MATERIAL RIGIDLY ATTACHED TO SAID JET PIPE; AND A PAIR OF MUTUALLY OPPOSING MAGNETIC MEANS SPACED ON OPPOSITE SIDES OF SAID ARMATURE TO APPLY OPPOSING FORCES TO SAID ARMATURE TO TEND TO ROTATE SAID JET PIPE FROM A REFERENCE POSITION OF UNSTABLE EQUILIBRIUM PRODUCED BY APPLICATION OF SAID OPPOSING FORCES TO SAID JET PIPE BY SAID MAGNETIC MEANS.
References Cited (Backward Citations)
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1967-06-16 | 1967-12-16 | 1968-06-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-06-16 | 1971-12-16 | 1972-06-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-06-16 | 1975-12-16 | 1976-06-16 | $7700.00 | Window Closed / Lapsed |