US3104916A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Piston rod seal for shock absorbers
Assignee: Individual
•
Filing: 1960-09-08
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Granted: 1963-09-24
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Expires: 1980-09-08
Abstract
No abstract record available.
Inventors
- 👤 William E Dowling
- 👤 John E Heckethorn
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 16:23
CPC Classifications
F; F16; F16F; F16F9/00; F16F9/32; F16F9/36; F16F9/362; F16J; F16J15/00; F16J15/56
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
227 words
SUPPLEMENTAL SEALING STRUCTURE FOR THE PISTON ROD OF A HYDRAULIC TELESCOPING CYLINDER-AND-PISTON SHOCK ABSORBER IN WHICH THE END OF THE CYLINDER THROUGH WHICH THE PISTON ROD RECIPROCATES IS PROVIDED WITH SEALING AND GUIDING MEANS INCLUDING A RIGID ROD GUIDE PLATE FITTED WITHIN THE END OF THE CASING WALL AND HAVING AN OPENING THROUGH WHICH SAID PISTON ROD IS GUIDED; SAID GUIDE PLATE HAVING THE OUTER MARGINAL PORTION OF ITS OUTWARD FACING SURFACE SUBSTANTIALLY FLUSH WITH THE END OF THE CYLINDER WALL, SAID GUIDE PLATE HAVING A CENTRALLY DISPOSED OUTWARDLY PROJECTING BOSS FORMED THEREON; SAID SUPPLEMENTAL STRUCTURE COMPRISING: AN OUTER RETAINER ELEMENT HAVING A PERIPHERAL FLANGE EMBRACING THE END PORTION OF THE CASING WALL AND RESISTANCE WELDED THERETO, A TRANSVERSE INTERMEDIATE PORTION OF THE OUTER RETAINER ELEMENT BEARING AGAINST BOTH THE END OF THE CASING WALL AND THE SAID MARGINAL PORTION OF THE OUTER FACE OF THE ROD GUIDE TO SQUARE UP THE GUIDE PLATE WITH THE END OF SAID WALL, THE AXIALLY OUTWARDLY PROJECTING INTERMEDIATE BOSS OF THE GUIDE PLATE AND OUTER RETAINER ELEMENT BEING SPACED APART, AND A DUST SEAL MEMBER HAVING A PERIPHERAL PORTION SEIZED BETWEEN SAID OUTWARDLY PROJECTING INTERMEDIATE BOSS OF THE GUIDE PLATE AND RETAINER ELEMENT, AND HAVING AN INNER ANNULAR PORTION CLOSELY AND SLIDINGLY ENGAGING THE PISTON ROD BUT FREE OF GRIPPING SUPPORT WHEREBY IT IS SUBJECT TO LIMITED FLOATING FLEXING MOVEMENT.
Claim 2
Dependent Claim
227 words
SUPPLEMENTAL SEALING STRUCTURE FOR THE PISTON ROD OF A HYDRAULIC TELESCOPING CYLINDER-AND-PISTON SHOCK ABSORBER IN WHICH THE END OF THE CYLINDER THROUGH WHICH THE PISTON ROD RECIPROCATES IS PROVIDED WITH SEALING AND GUIDING MEANS INCLUDING A RIGID ROD GUIDE PLATE FITTED WITHIN THE END OF THE CASING WALL AND HAVING AN OPENING THROUGH WHICH SAID PISTON ROD IS GUIDED; SAID GUIDE PLATE HAVING THE OUTER MARGINAL PORTION OF ITS OUTWARD FACING SURFACE SUBSTANTIALLY FLUSH WITH THE END OF THE CYLINDER WALL, SAID GUIDE PLATE HAVING A CENTRALLY DISPOSED OUTWARDLY PROJECTING BOSS FORMED THEREON; SAID SUPPLEMENTAL STRUCTURE COMPRISING: AN OUTER RETAINER ELEMENT HAVING A PERIPHERAL FLANGE EMBRACING THE END PORTION OF THE CASING WALL AND RESISTANCE WELDED THERETO, A TRANSVERSE INTERMEDIATE PORTION OF THE OUTER RETAINER ELEMENT BEARING AGAINST BOTH THE END OF THE CASING WALL AND THE SAID MARGINAL PORTION OF THE OUTER FACE OF THE ROD GUIDE TO SQUARE UP THE GUIDE PLATE WITH THE END OF SAID WALL, THE AXIALLY OUTWARDLY PROJECTING INTERMEDIATE BOSS OF THE GUIDE PLATE AND OUTER RETAINER ELEMENT BEING SPACED APART, AND A DUST SEAL MEMBER HAVING A PERIPHERAL PORTION SEIZED BETWEEN SAID OUTWARDLY PROJECTING INTERMEDIATE BOSS OF THE GUIDE PLATE AND RETAINER ELEMENT, AND HAVING AN INNER ANNULAR PORTION CLOSELY AND SLIDINGLY ENGAGING THE PISTON ROD BUT FREE OF GRIPPING SUPPORT WHEREBY IT IS SUBJECT TO LIMITED FLOATING FLEXING MOVEMENT.
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) | 1966-09-23 | 1967-03-25 | 1967-09-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1970-09-23 | 1971-03-25 | 1971-09-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1974-09-23 | 1975-03-25 | 1975-09-24 | $7700.00 | Window Closed / Lapsed |