Patent US3295451A successfully refreshed from Google Patents.
US3295451A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Hydraulic power converter
Assignee: Individual
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Filing: 1965-11-10
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Granted: 1967-01-03
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Expires: 1985-11-10
Abstract
No abstract record available.
Inventors
- 👤 James E Smith
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 21:49
CPC Classifications
F; F04; F04B; F04B9/00; F04B9/02; F04B9/06; F01; F01L; F01L33/00; F01L33/02; F04B53/00; F04B53/14; F04B53/16; F04B53/162; F04B53/164; F04B7/00; F04B7/0019; F04B7/0023; F04B9/08; F04B9/10; F04B9/109; F04B9/117; F04B9/1176; F04B9/1178; Y; Y10; Y10S; Y10S417/00; Y10S417/90
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
215 words
A HYDRAULIC POWER CONVERTER COMPRISING: (A) A SOURCE OF PRESSURIZED HYDRAULIC ACTUATING FLUID, (B) MAIN DISTRIBUTOR INLET AND EXHAUST PORTS COMMUNICATING WITH THE PRESSURIZED ACTUATING FLUID SOURCE, (C) AT LEAST THREE POWER TRANSFER CYLINDERS, EACH OF THE CYLINDERS HAVING: (1) A DAM POSITIONED THEREIN, (2) A PISTON MOUNTED FOR RECIPROCAL MOVEMENT IN THE CYLINDER, SAID PISTON INCLUDING: (A) A STEM SLIDABLE THROUGH THE DAM, (B) HEADS ON OPPOSITE ENDS OF THE PISTONS, (C) THE PISTON HEADS, DAM AND CYLINDER DEFINING EXPANSIBLE CHAMBERS BETWEEN THE HEADS AND THE ENDS OF THE CYLINDER AND A TRAPPED FLUID CHAMBER BETWEEN THE DAM AND THE INNER FACE OF THE HEAD EXPOSED TO THE ACTUATING FLUID, (3) ACTUATING FLUID INLET AND EXHAUST PORTS ALIGNED WITH THE DISTRIBUTOR ACTUATING FLUID INLET AND EXHAUST PORTS, (D) MEANS CONNECTING AT ALL TIMES THE TRAPPED FLUID EXPANSIBLE CHAMBERS IN THE CYLINDERS, (E) MEANS FOR ALTERNATELY AND IN TURN MOVING THE DISTRIBUTOR ACTUATING FLUID INLET AND EXHAUST PORTS INTO AND OUT OF COMMUNICATION WITH THE INLET AND EXHAUST PORTS OF EACH OF THE CYLINDERS, AND (F) PUMPED FLUID INLET AND EXHAUST MEANS COMMUNICATING WITH THE EXPANSIBLE PUMPED FLUID CHAMBERS IN THE POWER TRANSFER CYLINDERS AND TIMED WITH THE OPERATION OF THE PISTONS TO DELIVER A CONTINUOUS, UNINTERRUPTED NON-PULSATING OUTPUT OF PUMPED FLUID FROM THE CONVERTER.
Claim 2
Dependent Claim
215 words
A HYDRAULIC POWER CONVERTER COMPRISING: (A) A SOURCE OF PRESSURIZED HYDRAULIC ACTUATING FLUID, (B) MAIN DISTRIBUTOR INLET AND EXHAUST PORTS COMMUNICATING WITH THE PRESSURIZED ACTUATING FLUID SOURCE, (C) AT LEAST THREE POWER TRANSFER CYLINDERS, EACH OF THE CYLINDERS HAVING: (1) A DAM POSITIONED THEREIN, (2) A PISTON MOUNTED FOR RECIPROCAL MOVEMENT IN THE CYLINDER, SAID PISTON INCLUDING: (A) A STEM SLIDABLE THROUGH THE DAM, (B) HEADS ON OPPOSITE ENDS OF THE PISTONS, (C) THE PISTON HEADS, DAM AND CYLINDER DEFINING EXPANSIBLE CHAMBERS BETWEEN THE HEADS AND THE ENDS OF THE CYLINDER AND A TRAPPED FLUID CHAMBER BETWEEN THE DAM AND THE INNER FACE OF THE HEAD EXPOSED TO THE ACTUATING FLUID, (3) ACTUATING FLUID INLET AND EXHAUST PORTS ALIGNED WITH THE DISTRIBUTOR ACTUATING FLUID INLET AND EXHAUST PORTS, (D) MEANS CONNECTING AT ALL TIMES THE TRAPPED FLUID EXPANSIBLE CHAMBERS IN THE CYLINDERS, (E) MEANS FOR ALTERNATELY AND IN TURN MOVING THE DISTRIBUTOR ACTUATING FLUID INLET AND EXHAUST PORTS INTO AND OUT OF COMMUNICATION WITH THE INLET AND EXHAUST PORTS OF EACH OF THE CYLINDERS, AND (F) PUMPED FLUID INLET AND EXHAUST MEANS COMMUNICATING WITH THE EXPANSIBLE PUMPED FLUID CHAMBERS IN THE POWER TRANSFER CYLINDERS AND TIMED WITH THE OPERATION OF THE PISTONS TO DELIVER A CONTINUOUS, UNINTERRUPTED NON-PULSATING OUTPUT OF PUMPED FLUID FROM THE CONVERTER.
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) | 1970-01-02 | 1970-07-04 | 1971-01-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-01-02 | 1974-07-04 | 1975-01-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-01-02 | 1978-07-04 | 1979-01-03 | $7700.00 | Window Closed / Lapsed |