Patent US2735515A successfully refreshed from Google Patents.
US2735515A
Expired / Lapsed
US
⏱️ 0.0 years remaining
cloudsley
Assignee: —
•
Filing: —
•
Granted: 1956-02-21
•
Expires: 1973-02-21
Abstract
No abstract record available.
Inventors
No inventors recorded.
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 02:12
CPC Classifications
F; F16; F16F; F16F9/00; F16F9/32; F16F9/34; F16F9/348; F16F9/3482; F16K; F16K47/00; F16K47/08; F16K47/10; Y; Y10; Y10T; Y10T137/00; Y10T137/7722; Y10T137/7771
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
137 words
A HYDRAULIC SHOCK ABSORBER COMPRISING A LIQUID FILLED CYLINDER, A PISTON RECIPROCABLE THEREIN, VALVE MEANS WITHIN THE PISTON PERMITTING RESTRICTED FLOW OF THE LIQUID THROUGH THE PISTON WHEN THE LATTER MOVES ALONG THE CYLINDER IN ONE DIRECTION, AND MEANS ALSO WITHIN THE PISTON PERMITTING RELATIVELY FREE FLOW OF THE LIQUID THROUGH THE PISTON WHEN THE LATTER MOVES ALONG THE CYLINDER IN THE OPPOSITE DIRECTION, THE SAID FLOW RESTRICTING VALVE MEANS COMPRISING A VALVE MEMBER AND A VALVE SEATING MEMBER THEREFOR, SAID VALVE MEMBER BEING IN THE FORM OF A PAIR OF DISHED RESILIENT ANNULAR DISCS PLACED FACE TO FACE WITH THEIR OUTER PERIPHERIES IN CONTACT WITH ONE ANOTHER, ONE DISC OF THE PAIR BEING NORMALLY SEATED ANNULARLY AT ITS INNER PERIPHERY AGAINST THE VALVE SEATING MEMBER AND BEING SUBJECT TO DEFLECTION BY THE LIQUID PRESSURE UPON IT
Claim 2
Dependent Claim
137 words
A HYDRAULIC SHOCK ABSORBER COMPRISING A LIQUID FILLED CYLINDER, A PISTON RECIPROCABLE THEREIN, VALVE MEANS WITHIN THE PISTON PERMITTING RESTRICTED FLOW OF THE LIQUID THROUGH THE PISTON WHEN THE LATTER MOVES ALONG THE CYLINDER IN ONE DIRECTION, AND MEANS ALSO WITHIN THE PISTON PERMITTING RELATIVELY FREE FLOW OF THE LIQUID THROUGH THE PISTON WHEN THE LATTER MOVES ALONG THE CYLINDER IN THE OPPOSITE DIRECTION, THE SAID FLOW RESTRICTING VALVE MEANS COMPRISING A VALVE MEMBER AND A VALVE SEATING MEMBER THEREFOR, SAID VALVE MEMBER BEING IN THE FORM OF A PAIR OF DISHED RESILIENT ANNULAR DISCS PLACED FACE TO FACE WITH THEIR OUTER PERIPHERIES IN CONTACT WITH ONE ANOTHER, ONE DISC OF THE PAIR BEING NORMALLY SEATED ANNULARLY AT ITS INNER PERIPHERY AGAINST THE VALVE SEATING MEMBER AND BEING SUBJECT TO DEFLECTION BY THE LIQUID PRESSURE UPON IT
References Cited (Backward Citations)
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Cited
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US1616091A
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US1988194A
Cited
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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) | 1959-02-20 | 1959-08-22 | 1960-02-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-02-20 | 1963-08-22 | 1964-02-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-02-20 | 1967-08-22 | 1968-02-21 | $7700.00 | Window Closed / Lapsed |