Patent US3421606A successfully refreshed from Google Patents.
US3421606A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Load-responsive hydraulic shock absorbers
Assignee: Automobiles Citroen SA
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Filing: 1966-12-09
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Granted: 1969-01-14
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Expires: 1986-12-09
Abstract
No abstract record available.
Inventors
- 👤 Jean Georges Cadiou
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 07:15
CPC Classifications
B; B60; B60G; B60G17/00; B60G17/06; B60G17/08; F; F16; F16F; F16F9/00; F16F9/32; F16F9/44; F16F9/46; F16F9/50; F16F9/512; Y; Y10; Y10T; Y10T137/00; Y10T137/7722; Y10T137/7771
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
140 words
HYDRAULIC SHOCK ABSORBER FOR AUTOMATIVE OR OTHER VEHICLES EQUIPPED ITH A HYDRAULIC SUSPENSION SYSTEM, THIS SHOCK ABSORBER BEING OF THE TYPE COMPRISING A HOLLOW BODY FILLED WITH LIQUID, A PARTITION SEPARATING SAID HOLLOW BODY INTO TWO COMPARTMENTS OF WHICH ONE IS OF THE VARIABLE VOLUME TYPE, AND VALVE MEANS CONTROLLING THE FLOW, THROUGH SUITABLE DUCT OF THE AFORESAID LIQUID FROM ONE COMPARTMENT TO ANOTHER, THIS SHOCK ABSORBER BEING FURTHER CHARACTERISED IN THAT SAID PARTITION COMPRISES IN A BORE AND AUXILIARY JET CONSISTING OF A SLIDE VALVE RESPONSIVE TO ELASTIC RETURN MEANS AND HAVING ONE END RESPONSIVE TO THE SUSPENSION LIQUID PRESSURE AND THE OTHER END RESPONSIVE TO A CONSTANT PRESSURE, SAID SLIDE VALVE BEING ADAPTED, IN PREDETERMINED POSITIONS, TO OPEN OR CLOSE AT LEAST ONE AUXILIARY COMMUNICATION PASSAGE BETWEEN SAID TWO COMPARTMENTS, SAID PASSAGE BEING CONTROLLED BY SAID VALVE MEANS.
Claim 2
Dependent Claim
140 words
HYDRAULIC SHOCK ABSORBER FOR AUTOMATIVE OR OTHER VEHICLES EQUIPPED ITH A HYDRAULIC SUSPENSION SYSTEM, THIS SHOCK ABSORBER BEING OF THE TYPE COMPRISING A HOLLOW BODY FILLED WITH LIQUID, A PARTITION SEPARATING SAID HOLLOW BODY INTO TWO COMPARTMENTS OF WHICH ONE IS OF THE VARIABLE VOLUME TYPE, AND VALVE MEANS CONTROLLING THE FLOW, THROUGH SUITABLE DUCT OF THE AFORESAID LIQUID FROM ONE COMPARTMENT TO ANOTHER, THIS SHOCK ABSORBER BEING FURTHER CHARACTERISED IN THAT SAID PARTITION COMPRISES IN A BORE AND AUXILIARY JET CONSISTING OF A SLIDE VALVE RESPONSIVE TO ELASTIC RETURN MEANS AND HAVING ONE END RESPONSIVE TO THE SUSPENSION LIQUID PRESSURE AND THE OTHER END RESPONSIVE TO A CONSTANT PRESSURE, SAID SLIDE VALVE BEING ADAPTED, IN PREDETERMINED POSITIONS, TO OPEN OR CLOSE AT LEAST ONE AUXILIARY COMMUNICATION PASSAGE BETWEEN SAID TWO COMPARTMENTS, SAID PASSAGE BEING CONTROLLED BY SAID VALVE MEANS.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-01-14 | 1972-07-15 | 1973-01-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-01-14 | 1976-07-15 | 1977-01-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-01-14 | 1980-07-15 | 1981-01-14 | $7700.00 | Window Closed / Lapsed |