US3301410A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Hydraulic shock absorbing apparatus
Assignee: Halliburton Co
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Filing: 1966-02-14
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Granted: 1967-01-31
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Expires: 1986-02-14
Abstract
No abstract record available.
Inventors
- 👤 Seay Orum Elwyn
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 06:13
CPC Classifications
F; F16; F16F; F16F9/00; F16F9/32; F16F9/48
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
112 words
A HYDRAULIC CUSHIONING APPARATUS OF THE TYPE DESCRIBED, COMPRISING, IN COMBINATION: A CYLINDER ADAPTED TO CONTAIN HYDRAULIC FLUID, A PISTON ADAPTED TO MOVE AXIALLY RELATIVE TO SAID CYLINDER, MEANS FORMING A CHAMBER, A PLURALITY OF METERING PORTS ESTABLISHING THE SOLE COMMUNICATION BETWEEN SAID CYLINDER AND SAID CHAMBER, ALL OF SAID METERING PORTS BEING EXPONENTIALLY SPACED AXIALLY, SUCCESSIVE METERING PORTS BEING SPACED CLOSER TOGETHER IN THE DIRECTION OF THE WORKING STROKE OF THE PISTON, EACH METERING PORT HAVING A DIAMETER OF FROM ABOUT 0.28 INCH TO ABOUT 0.38 INCH, RELATIVE AXIAL MOVEMENT OF SAID PISTON AND CYLINDER ACTING TO FORCE HYDRAULIC FLUID FROM SAID CYLINDER THROUGH SAID METERING PORTS AND INTO SAID CHAMBER.
Claim 2
Dependent Claim
112 words
A HYDRAULIC CUSHIONING APPARATUS OF THE TYPE DESCRIBED, COMPRISING, IN COMBINATION: A CYLINDER ADAPTED TO CONTAIN HYDRAULIC FLUID, A PISTON ADAPTED TO MOVE AXIALLY RELATIVE TO SAID CYLINDER, MEANS FORMING A CHAMBER, A PLURALITY OF METERING PORTS ESTABLISHING THE SOLE COMMUNICATION BETWEEN SAID CYLINDER AND SAID CHAMBER, ALL OF SAID METERING PORTS BEING EXPONENTIALLY SPACED AXIALLY, SUCCESSIVE METERING PORTS BEING SPACED CLOSER TOGETHER IN THE DIRECTION OF THE WORKING STROKE OF THE PISTON, EACH METERING PORT HAVING A DIAMETER OF FROM ABOUT 0.28 INCH TO ABOUT 0.38 INCH, RELATIVE AXIAL MOVEMENT OF SAID PISTON AND CYLINDER ACTING TO FORCE HYDRAULIC FLUID FROM SAID CYLINDER THROUGH SAID METERING PORTS AND INTO SAID CHAMBER.
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) | 1970-01-30 | 1970-08-01 | 1971-01-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-01-30 | 1974-08-01 | 1975-01-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-01-30 | 1978-08-01 | 1979-01-31 | $7700.00 | Window Closed / Lapsed |