Patent US5339430A successfully refreshed from Google Patents.
Patent US3174587A successfully refreshed from Google Patents.
US3174587A
Expired / Lapsed
US
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Adjustable shock absorber
Assignee: Individual
•
Filing: 1964-03-12
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Granted: 1965-03-23
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Expires: 1984-03-12
Abstract
No abstract record available.
Inventors
- 👤 Walton Marvin
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 12:24
CPC Classifications
F; F16; F16F; F16F9/00; F16F9/32; F16F9/53; F16F9/535; B; B60; B60G; B60G17/00; B60G17/015; B60G17/0152
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
107 words
AN ADJUSTABLE SHOCK ABSORBER COMPRISING A VESSEL HAVING CLOSED ENDS, A MAGNETIC LIQUID WITHIN ASID VESSEL, A HOLLOW PISTON SLIDABLY RECEIVED WITHIN VESSEL, A MAGNETIZING WINDING ARRANGED WITHIN SAID HOLLOW PISTON, SAID PISTON HAVING A CORE PORTION LOCATED WITHIN SAID WINDING AND PERIPHERALLY LOCATED PORTIONS OF MAGNETIZABLE MATERIAL TO PROVIDE A LOW RELUCTANCE PATH FOR THE MAGNETIC FLUX PRODUCED BY SAID WINDING, SAID PORTIONS BEING ARRANGED TO FORM A GAP IN SAID PATH, A MEMBER OF NONMAGNETIC MATERIAL HELD WITHIN SAID GAP AND CONTAINING A CHANNEL ESTABLISHING COMMUNICATION BETWEEN THE SPACES WITHIN SAID VESSEL AT EITHER SIDE OF SAID PISTON, AND MEANS FOR ENERGIZING SAID MAGNETIZING WINDING.
Claim 2
Dependent Claim
107 words
AN ADJUSTABLE SHOCK ABSORBER COMPRISING A VESSEL HAVING CLOSED ENDS, A MAGNETIC LIQUID WITHIN ASID VESSEL, A HOLLOW PISTON SLIDABLY RECEIVED WITHIN VESSEL, A MAGNETIZING WINDING ARRANGED WITHIN SAID HOLLOW PISTON, SAID PISTON HAVING A CORE PORTION LOCATED WITHIN SAID WINDING AND PERIPHERALLY LOCATED PORTIONS OF MAGNETIZABLE MATERIAL TO PROVIDE A LOW RELUCTANCE PATH FOR THE MAGNETIC FLUX PRODUCED BY SAID WINDING, SAID PORTIONS BEING ARRANGED TO FORM A GAP IN SAID PATH, A MEMBER OF NONMAGNETIC MATERIAL HELD WITHIN SAID GAP AND CONTAINING A CHANNEL ESTABLISHING COMMUNICATION BETWEEN THE SPACES WITHIN SAID VESSEL AT EITHER SIDE OF SAID PISTON, AND MEANS FOR ENERGIZING SAID MAGNETIZING WINDING.
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) | 1968-03-22 | 1968-09-21 | 1969-03-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-03-22 | 1972-09-21 | 1973-03-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-03-22 | 1976-09-21 | 1977-03-23 | $7700.00 | Window Closed / Lapsed |