US3279781A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Hydraulic buffer
Assignee: Houdaille Industries Inc
•
Filing: 1965-04-23
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Granted: 1966-10-18
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Expires: 1985-04-23
Abstract
No abstract record available.
Inventors
- 👤 Douglas Rumsey Rollin
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 16:34
CPC Classifications
F; F16; F16F; F16F9/00; F16F9/32; F16F9/54; B; B61; B61G; B61G11/00; B61G11/12; F16F1/00; F16F1/02; F16F1/04; F16F1/12; F16F1/128; F16F9/10; F16F9/14; F16F9/16; F16F9/18; F16F9/48; F16F9/486
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
123 words
A HYDRAULIC BUFFER ADAPTED TO BE CONNECTED BETWEEN A PAIR OF RELATIVELY MOVABLE MEMBERS, COMPRISING A CYLINDER, AN END WALL OF THE CYLINDER, A METERING TUBE SECURED TO THE END WALL AND EXTENDING CONCENTRICALLY INTO THE CYLINDER, A FIRST PISTON IN SAID CYLINDER SLIDABLY AND SNUGLY ENGAGING THE METERING TUBE, A PISTON ROD FOR SAID PISTON INCLUDING A CYLINDER CLOSED AT AN END OPPOSITE THE PISTON, A SECOND PISTON IN SAID PISTON ROD CYLINDER, MEANS URGING SAID SECOND PISTON TOWARD SAID FIRST PISTON, SAID PISTONS DEFINING A RESERVOIR THEREBETWEEN, AND SAID METERING TUBE HAVING A PLURALITY OF AXIALLY NON-UNIFORMLY SPACED ORIFICES WHEREBY FLUID IS METERED FROM THE CYLINDER TO THE RESERVOIR IN RESPONSE TO CLOSING ACTION OF THE FIRST PISTON IN THE CYLINDER.
Claim 2
Dependent Claim
123 words
A HYDRAULIC BUFFER ADAPTED TO BE CONNECTED BETWEEN A PAIR OF RELATIVELY MOVABLE MEMBERS, COMPRISING A CYLINDER, AN END WALL OF THE CYLINDER, A METERING TUBE SECURED TO THE END WALL AND EXTENDING CONCENTRICALLY INTO THE CYLINDER, A FIRST PISTON IN SAID CYLINDER SLIDABLY AND SNUGLY ENGAGING THE METERING TUBE, A PISTON ROD FOR SAID PISTON INCLUDING A CYLINDER CLOSED AT AN END OPPOSITE THE PISTON, A SECOND PISTON IN SAID PISTON ROD CYLINDER, MEANS URGING SAID SECOND PISTON TOWARD SAID FIRST PISTON, SAID PISTONS DEFINING A RESERVOIR THEREBETWEEN, AND SAID METERING TUBE HAVING A PLURALITY OF AXIALLY NON-UNIFORMLY SPACED ORIFICES WHEREBY FLUID IS METERED FROM THE CYLINDER TO THE RESERVOIR IN RESPONSE TO CLOSING ACTION OF THE FIRST PISTON IN THE CYLINDER.
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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) | 1969-10-17 | 1970-04-18 | 1970-10-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-10-17 | 1974-04-18 | 1974-10-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-10-17 | 1978-04-18 | 1978-10-18 | $7700.00 | Window Closed / Lapsed |