US3105573A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Control system for automatic hydraulic elevators
Assignee: Individual
•
Filing: 1960-10-04
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Granted: 1963-10-01
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Expires: 1980-10-04
Abstract
No abstract record available.
Inventors
- 👤 Leveski Peter
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 02:16
CPC Classifications
B; B66; B66B; B66B1/00; B66B1/24; B66B1/34; B66B1/36; B66B1/40; B66B1/405
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
332 words
IN A HYDRAULIC ELEVATOR SYSTEM WHEREIN AN ELEVATOR CAB IS DRIVEN BY A HYDRAULIC RAM, APPARATUS FOR CONTROLLING THE OPERATION OF SAID HYDRAULIC RAM, INCLUDING A HYDRAULIC CONTROL VALVE AND CONTROL MEANS INCLUDING A PILOT VALVE OPERATING AND CONTROLLING SAID HYDRAULIC CONTROL VALVE THROUGH A LINKAGE BETWEEN THE RESPECTIVE VALVE STEMS OF SAID HYDRAULIC CONTROL VALVE AND SAID PILOT VALVE, SAID HYDRAULIC CONTROL VALVE HAVING A PORT COMMUNICATING WITH A FLUID PRESSURE SOURCE, A SECOND PORT COMMUNICATING WITH THE HYDRAULIC RAM AND A THIRD PORT COMMUNICATING WITH A FLUID SINK, THE VALVE STEM OF SAID HYDRAULIC CONTROL VALVE BEING MOVABLE IN ONE DIRECTION TO CLOSE OFF THE FLUID SINK AND TO PROVIDE COMMUNICATION BETWEEN THE FLUID PRESSURE SOURCE AND THE HYDRAULIC RAM FOR UPWARD MOVEMENT OF THE ELEVATOR CAB AND BEING MOVABLE IN THE OPPOSITE DIRECTION TO CLOSE OFF THE FLUID PRESSURE SOURCE AND TO PROVIDE COMMUNICATION BETWEEN THE HYDRAULIC RAM AND THE FLUID SINK FOR DOWNWARD MOVEMENT OF THE ELEVATOR CAB, AND AUXILIARY HYDRAULIC CONTROL VALVE MEANS CONNECTED TO SAID LINKAGE TO COMPENSATE FOR LOAD VARIATIONS AND THEREBY TO REGULATE THE SPEED OF THE ELEVATOR CAB AS DESIRED, REGARDLESS OF ITS LOAD, SAID AUXILIARY HYDRAULIC CONTROL VALVE MEANS COMPRISING A FIXED PANEL AND A PANEL MOVABLE RELATIVE TO SAID FIXED PANEL, SAID MOVABLE PANEL BEING CONNECTED TO SAID LINKAGE FOR MOVEMENT THEREWITH, EACH OF SAID PANELS BEING PROVIDED WITH A PLURALITY OF CONTROL SWITCH ELEMENTS WHICH ARE ADJUSTABLY MOUNTED THEREON, THE SWITCH CONTROL ELEMENTS OF THE MOVABLE PANEL BEING SELECTIVELY ENGAGEABLE WITH THE SWITCH CONTROL ELEMENTS OF THE FIXED PANEL, THE EXTENT OF MOVEMENT OF SAID MOVABLE PANEL RELATIVE TO SAID FIXED PANEL DETERMINING WHICH OF THE CONTROL ELEMENTS OF THE FIXED PANEL WILL BE ENGAGED BY THE SWITCH CONTROL ELEMENTS OF THE MOVABLE PANEL, SAID SWITCH CONTROL ELEMENTS OF THE FIXED PANEL BEING IN CIRCUIT WITH SOLENOID CONTROL MEANS CONNECTED TO THE PILOT VALVE, WHEREBY SAID PILOT VALVE IS OPERATED AND CONTROLLED TO CONTROL OPERATION OF THE HYDRAULIC CONTROL VALVE.
Claim 2
Dependent Claim
332 words
IN A HYDRAULIC ELEVATOR SYSTEM WHEREIN AN ELEVATOR CAB IS DRIVEN BY A HYDRAULIC RAM, APPARATUS FOR CONTROLLING THE OPERATION OF SAID HYDRAULIC RAM, INCLUDING A HYDRAULIC CONTROL VALVE AND CONTROL MEANS INCLUDING A PILOT VALVE OPERATING AND CONTROLLING SAID HYDRAULIC CONTROL VALVE THROUGH A LINKAGE BETWEEN THE RESPECTIVE VALVE STEMS OF SAID HYDRAULIC CONTROL VALVE AND SAID PILOT VALVE, SAID HYDRAULIC CONTROL VALVE HAVING A PORT COMMUNICATING WITH A FLUID PRESSURE SOURCE, A SECOND PORT COMMUNICATING WITH THE HYDRAULIC RAM AND A THIRD PORT COMMUNICATING WITH A FLUID SINK, THE VALVE STEM OF SAID HYDRAULIC CONTROL VALVE BEING MOVABLE IN ONE DIRECTION TO CLOSE OFF THE FLUID SINK AND TO PROVIDE COMMUNICATION BETWEEN THE FLUID PRESSURE SOURCE AND THE HYDRAULIC RAM FOR UPWARD MOVEMENT OF THE ELEVATOR CAB AND BEING MOVABLE IN THE OPPOSITE DIRECTION TO CLOSE OFF THE FLUID PRESSURE SOURCE AND TO PROVIDE COMMUNICATION BETWEEN THE HYDRAULIC RAM AND THE FLUID SINK FOR DOWNWARD MOVEMENT OF THE ELEVATOR CAB, AND AUXILIARY HYDRAULIC CONTROL VALVE MEANS CONNECTED TO SAID LINKAGE TO COMPENSATE FOR LOAD VARIATIONS AND THEREBY TO REGULATE THE SPEED OF THE ELEVATOR CAB AS DESIRED, REGARDLESS OF ITS LOAD, SAID AUXILIARY HYDRAULIC CONTROL VALVE MEANS COMPRISING A FIXED PANEL AND A PANEL MOVABLE RELATIVE TO SAID FIXED PANEL, SAID MOVABLE PANEL BEING CONNECTED TO SAID LINKAGE FOR MOVEMENT THEREWITH, EACH OF SAID PANELS BEING PROVIDED WITH A PLURALITY OF CONTROL SWITCH ELEMENTS WHICH ARE ADJUSTABLY MOUNTED THEREON, THE SWITCH CONTROL ELEMENTS OF THE MOVABLE PANEL BEING SELECTIVELY ENGAGEABLE WITH THE SWITCH CONTROL ELEMENTS OF THE FIXED PANEL, THE EXTENT OF MOVEMENT OF SAID MOVABLE PANEL RELATIVE TO SAID FIXED PANEL DETERMINING WHICH OF THE CONTROL ELEMENTS OF THE FIXED PANEL WILL BE ENGAGED BY THE SWITCH CONTROL ELEMENTS OF THE MOVABLE PANEL, SAID SWITCH CONTROL ELEMENTS OF THE FIXED PANEL BEING IN CIRCUIT WITH SOLENOID CONTROL MEANS CONNECTED TO THE PILOT VALVE, WHEREBY SAID PILOT VALVE IS OPERATED AND CONTROLLED TO CONTROL OPERATION OF THE HYDRAULIC CONTROL VALVE.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1966-09-30 | 1967-04-01 | 1967-10-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1970-09-30 | 1971-04-01 | 1971-10-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1974-09-30 | 1975-04-01 | 1975-10-01 | $7700.00 | Window Closed / Lapsed |