US3150783A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Hydraulic cushion
Assignee: Cardwell Westinghouse Co
•
Filing: 1963-05-08
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Granted: 1964-09-29
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Expires: 1983-05-08
Abstract
No abstract record available.
Inventors
- 👤 David S Campbell
- 👤 Eldred H Natschke
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 11:39
CPC Classifications
B; B61; B61G; B61G9/00; B61G9/04; B61G9/08
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
145 words
IN A HYDRAULIC CUSHIONING ELEMENT HAVING RELATIVELY MOVABLE MEANS PROVIDING A HIGH PRESSURE CHAMBER, A LOW PRESSURE CHAMBER AND A PASSAGE EXTENDING THEREBETWEEN, MEANS IN SAID PASSAGE PROVIDING A FLOW RESTRICTING ORIFICE AT AN END THEREOF EXPOSED DIRECTLY TO SAID HIGH PRESSURE CHAMBER, A PIN DISPOSED IN LENGTHWISE SLIDABLE RELATION IN SAID PASSAGE AND HAVING A FREE END FACING THROUGH SAID ORFICE AND EXPOSED DIRECTLY TO PRESSURE CONDITIONS IN SAID HIGH PRESSURE CHAMBER, RESILIENTLY YIELDABLE MEANS ACTING AGAINST SAID PIN WITH PREDETERMINED INITIAL FORCE TO BIAS SAID PIN TOWARDS SAID HIGH PRESSURE CHAMBER TO AN ORIFICE NARROWING POSITION AND ESTABLISH A MINIMUM INITIAL ORIFICE OPENING AND ENABLE RETRACTION OF THE PIN AND CORRESPONDING OPENING OF THE ORIFICE WHEN PRESSURE IN THE HIGH PRESSURE CHAMBER INCREASES BEYOND A PREDETERMINED VALUE DETERMINED BY SAID INITIAL FORCE, SAID PIN HAVING AN AXIAL BORE THROUGH SAID FREE END AND
Claim 2
Dependent Claim
145 words
IN A HYDRAULIC CUSHIONING ELEMENT HAVING RELATIVELY MOVABLE MEANS PROVIDING A HIGH PRESSURE CHAMBER, A LOW PRESSURE CHAMBER AND A PASSAGE EXTENDING THEREBETWEEN, MEANS IN SAID PASSAGE PROVIDING A FLOW RESTRICTING ORIFICE AT AN END THEREOF EXPOSED DIRECTLY TO SAID HIGH PRESSURE CHAMBER, A PIN DISPOSED IN LENGTHWISE SLIDABLE RELATION IN SAID PASSAGE AND HAVING A FREE END FACING THROUGH SAID ORFICE AND EXPOSED DIRECTLY TO PRESSURE CONDITIONS IN SAID HIGH PRESSURE CHAMBER, RESILIENTLY YIELDABLE MEANS ACTING AGAINST SAID PIN WITH PREDETERMINED INITIAL FORCE TO BIAS SAID PIN TOWARDS SAID HIGH PRESSURE CHAMBER TO AN ORIFICE NARROWING POSITION AND ESTABLISH A MINIMUM INITIAL ORIFICE OPENING AND ENABLE RETRACTION OF THE PIN AND CORRESPONDING OPENING OF THE ORIFICE WHEN PRESSURE IN THE HIGH PRESSURE CHAMBER INCREASES BEYOND A PREDETERMINED VALUE DETERMINED BY SAID INITIAL FORCE, SAID PIN HAVING AN AXIAL BORE THROUGH SAID FREE END AND
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) | 1967-09-29 | 1968-03-30 | 1968-09-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-09-29 | 1972-03-30 | 1972-09-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-09-29 | 1976-03-30 | 1976-09-29 | $7700.00 | Window Closed / Lapsed |