US3296942A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Deceleration control for piston of conventional hydraulic cylinder
Assignee: International Motors LLC
•
Filing: 1965-03-08
•
Granted: 1967-01-10
•
Expires: 1985-03-08
Abstract
No abstract record available.
Inventors
- 👤 Vaughn A Nelson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 20:07
CPC Classifications
F; F15; F15B; F15B15/00; F15B15/20; F15B15/22; F15B15/224; F15B15/222
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
147 words
IN A HYDRAULIC SYSTEM COMPRISING A CONVENTIONAL HYDRAULIC CYLINDER HAVING A RECIPROCATING PISTON THEREIN AND A PLURALITY OF PORTS RESPECTIVELY ARRANGED IN PREDETERMINED SPACED RELATION WITH OPPOSITE ENDS OF SAID CYLINDER AND IN COMMUNICATION WITH THE SYSTEM, WHEREBY UPON OPERATION OF THE PISTON IN THE DIRECTION OF ONE OF SAID PORTS FLUID IN THE CYLINDER WILL BE DISCHARGED THROUGH SAID PORT, APPARATUS FOR CONTROLLING DECELERATION OF THE PISTON AS IT APPROACHES THE END OF IT STROKE INCLUDING A RADIALLY AND AXIALLY DISPLACEABLE RING PROVIDED WITH A GROOVE EXTENDING CIRCUMFERENTIALLY THEREOF AND REDUCING THE RESTRICTIVE SURFACE OF THE RING AND ADAPTED IN RESPONSE TO SAID DISCHARGE OF FLUID TO MOVE INTO A POSITION SUBSTANTIALLY RESTRICTING SAID ONE PORT AND REDUCING THE DISCHARGE OF FLUID THERETHROUGH PROGRESSIVELY AS THE PISTON ADVANCES THEREBY TO MODULATE DECELERATION OF THE PISTON IN THE COMPLETION OF ITS STROKE ACCORDING TO A PREDETERMINED PATTERN.
Claim 2
Dependent Claim
147 words
IN A HYDRAULIC SYSTEM COMPRISING A CONVENTIONAL HYDRAULIC CYLINDER HAVING A RECIPROCATING PISTON THEREIN AND A PLURALITY OF PORTS RESPECTIVELY ARRANGED IN PREDETERMINED SPACED RELATION WITH OPPOSITE ENDS OF SAID CYLINDER AND IN COMMUNICATION WITH THE SYSTEM, WHEREBY UPON OPERATION OF THE PISTON IN THE DIRECTION OF ONE OF SAID PORTS FLUID IN THE CYLINDER WILL BE DISCHARGED THROUGH SAID PORT, APPARATUS FOR CONTROLLING DECELERATION OF THE PISTON AS IT APPROACHES THE END OF IT STROKE INCLUDING A RADIALLY AND AXIALLY DISPLACEABLE RING PROVIDED WITH A GROOVE EXTENDING CIRCUMFERENTIALLY THEREOF AND REDUCING THE RESTRICTIVE SURFACE OF THE RING AND ADAPTED IN RESPONSE TO SAID DISCHARGE OF FLUID TO MOVE INTO A POSITION SUBSTANTIALLY RESTRICTING SAID ONE PORT AND REDUCING THE DISCHARGE OF FLUID THERETHROUGH PROGRESSIVELY AS THE PISTON ADVANCES THEREBY TO MODULATE DECELERATION OF THE PISTON IN THE COMPLETION OF ITS STROKE ACCORDING TO A PREDETERMINED PATTERN.
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) | 1970-01-09 | 1970-07-11 | 1971-01-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-01-09 | 1974-07-11 | 1975-01-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-01-09 | 1978-07-11 | 1979-01-10 | $7700.00 | Window Closed / Lapsed |