US3104591A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Tracer control circuit for machine tools
Assignee: Individual
•
Filing: 1961-12-14
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Granted: 1963-09-24
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Expires: 1981-12-14
Abstract
No abstract record available.
Inventors
- 👤 Sylvester R Cudnohufsky
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 21:12
CPC Classifications
B; B23; B23Q; B23Q35/00; B23Q35/04; B23Q35/08; B23Q35/18; B23Q2735/00; B23Q2735/02; B23Q2735/08; B23Q2735/082
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
205 words
IN A TRACER CONTROL CIRCUIT FOR GOVERNING THE OPERATION OF A PAIR OF FEED CYLINDERS ARRANGED TO FEED A CUTTING TOOL IN ANGULARLY RELATED DIRECTIONS, THE COMBINATION OF TWO SOURCES OF HYDRAULIC PRESSURE, ONE BEING CAPABLE OF DELIVERING A SUBSTANTIALLY HIGHER PRESSURE THAN THE OTHER, A TRACER VALVE, A FEED LINE CONNECTING THE TRACER VALVE WITH THE SOURCE OF HIGHER PRESSURE, A PATTERN-CONTROLLED ACTUATING MEANS TO CONTROL THE TRACER VALVE SO AS TO VARIABLY RESTRICT THE FLOW THERETHROUGH AND THEREBY VARY THE PRESSURE IN SAID FEED LINE, MEANS CONNECTING THE FEED LINE WITH ONE END OF ONE OF SAID CYLINDERS, A FEED LINE EXTENDING FROM SAID SOURCE OF LOWER PRESSURE TO ONE END OF THE OTHER CYLINDER, THE OTHER ENDS OF SAID TWO CYLINDERS EACH HAVING A DRAIN LINE EXTENDING THEREFROM, MEANS INDIVIDUAL TO EACH DRAIN LINE FOR RESTRICTING THE RATE OF EXHAUST FLOW FROM EACH CYLINDER TO INDEPENDENT MAXIMUM VALUES AND MEANS FOR ESTABLISHING COMMUNICATION BETWEEN THE FIRST FEED LINE AND THE DRAIN LINE FROM THE SECOND CYLINDER IN ADVANCE OF THE FLOW RESTRICTING MEANS THEREIN WHEN THE PRESSURE IN THE FIRST FEED LINE EXCEEDS A PREDETERMINED VALUE IN EXCESS OF THE PRESSURE OBTAINING THEREIN WHEN THE TRACER VALVE IS SUBJECTED TO MINIMUM RESTRICTION.
Claim 2
Dependent Claim
205 words
IN A TRACER CONTROL CIRCUIT FOR GOVERNING THE OPERATION OF A PAIR OF FEED CYLINDERS ARRANGED TO FEED A CUTTING TOOL IN ANGULARLY RELATED DIRECTIONS, THE COMBINATION OF TWO SOURCES OF HYDRAULIC PRESSURE, ONE BEING CAPABLE OF DELIVERING A SUBSTANTIALLY HIGHER PRESSURE THAN THE OTHER, A TRACER VALVE, A FEED LINE CONNECTING THE TRACER VALVE WITH THE SOURCE OF HIGHER PRESSURE, A PATTERN-CONTROLLED ACTUATING MEANS TO CONTROL THE TRACER VALVE SO AS TO VARIABLY RESTRICT THE FLOW THERETHROUGH AND THEREBY VARY THE PRESSURE IN SAID FEED LINE, MEANS CONNECTING THE FEED LINE WITH ONE END OF ONE OF SAID CYLINDERS, A FEED LINE EXTENDING FROM SAID SOURCE OF LOWER PRESSURE TO ONE END OF THE OTHER CYLINDER, THE OTHER ENDS OF SAID TWO CYLINDERS EACH HAVING A DRAIN LINE EXTENDING THEREFROM, MEANS INDIVIDUAL TO EACH DRAIN LINE FOR RESTRICTING THE RATE OF EXHAUST FLOW FROM EACH CYLINDER TO INDEPENDENT MAXIMUM VALUES AND MEANS FOR ESTABLISHING COMMUNICATION BETWEEN THE FIRST FEED LINE AND THE DRAIN LINE FROM THE SECOND CYLINDER IN ADVANCE OF THE FLOW RESTRICTING MEANS THEREIN WHEN THE PRESSURE IN THE FIRST FEED LINE EXCEEDS A PREDETERMINED VALUE IN EXCESS OF THE PRESSURE OBTAINING THEREIN WHEN THE TRACER VALVE IS SUBJECTED TO MINIMUM RESTRICTION.
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) | 1966-09-23 | 1967-03-25 | 1967-09-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1970-09-23 | 1971-03-25 | 1971-09-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1974-09-23 | 1975-03-25 | 1975-09-24 | $7700.00 | Window Closed / Lapsed |