US3339680A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Hydraulic shock absorber
Assignee: ABB Norden Holding AB
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Filing: 1964-12-28
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Granted: 1967-09-05
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Expires: 1984-12-28
Abstract
No abstract record available.
Inventors
- 👤 Tuneblom Eskil
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 02:47
CPC Classifications
F; F16; F16F; F16F9/00; F16F9/32; F16F9/34; F16F9/3405; Y; Y10; Y10T; Y10T137/00; Y10T137/7722; Y10T137/7771; Y10T137/7779
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
144 words
IN A HYDRAULIC SHOCK ABSORBER HAVING A DAMPING LIQUID THEREIN AND HAVING THROUGH-FLOW CONTROL MEANS FOR SAID DAMPING LIQUID, SAID CONTROL MEANS COMPRISING A PART HAVING A THROUGH-FLOW DUCT THEREIN, SAID PART HAVING IN ONE FACE MEANS FORMING, AN ANNULAR VALVE SEAT SURROUNDING A PART OF SAID THROUGH-FLOW DUCT, THE PORTION OF THE FACE AROUND THE VALVE SEAT RECEDING AWAY FROM THE VALVE SEAT, A VALVE BODY, AND RESILIENT MEANS URGING SAID VALVE BODY AGAINST SAID SEAT, THE PORTION OF SAID THROUGH-FLOW DUCT ADJACENT SAID VALVE SEAT BEING CONSIDERABLY NARROWER THAN ITS OTHER PARTS, SAID CONTROL MEANS BEING SO DIMENSIONED THAT AT THE HIGHEST CALCULATED ABSORBING SPEED OF THE SHOCK ABSORBER IN NORMAL OPERATION THE DYNAMIC PRESSURE DROP IN THE GAP BETWEEN SAID VALVE BODY AND SAID VALVE SEAT IS BETWEEN 75 AND 99 PERCENT OF THE TOTAL PRESSURE DROP IN THE THROUGHFLOW MEANS.
Claim 2
Dependent Claim
144 words
IN A HYDRAULIC SHOCK ABSORBER HAVING A DAMPING LIQUID THEREIN AND HAVING THROUGH-FLOW CONTROL MEANS FOR SAID DAMPING LIQUID, SAID CONTROL MEANS COMPRISING A PART HAVING A THROUGH-FLOW DUCT THEREIN, SAID PART HAVING IN ONE FACE MEANS FORMING, AN ANNULAR VALVE SEAT SURROUNDING A PART OF SAID THROUGH-FLOW DUCT, THE PORTION OF THE FACE AROUND THE VALVE SEAT RECEDING AWAY FROM THE VALVE SEAT, A VALVE BODY, AND RESILIENT MEANS URGING SAID VALVE BODY AGAINST SAID SEAT, THE PORTION OF SAID THROUGH-FLOW DUCT ADJACENT SAID VALVE SEAT BEING CONSIDERABLY NARROWER THAN ITS OTHER PARTS, SAID CONTROL MEANS BEING SO DIMENSIONED THAT AT THE HIGHEST CALCULATED ABSORBING SPEED OF THE SHOCK ABSORBER IN NORMAL OPERATION THE DYNAMIC PRESSURE DROP IN THE GAP BETWEEN SAID VALVE BODY AND SAID VALVE SEAT IS BETWEEN 75 AND 99 PERCENT OF THE TOTAL PRESSURE DROP IN THE THROUGHFLOW MEANS.
References Cited (Backward Citations)
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Cited
US1135923A
Cited
US2036955A
Cited
US2138513A
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US3098546A
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US3204728A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1970-09-04 | 1971-03-06 | 1971-09-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-09-04 | 1975-03-06 | 1975-09-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-09-04 | 1979-03-06 | 1979-09-05 | $7700.00 | Window Closed / Lapsed |