US3214901A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Hydraulic control system
Assignee: Individual
•
Filing: 1963-05-22
•
Granted: 1965-11-02
•
Expires: 1983-05-22
Abstract
No abstract record available.
Inventors
- 👤 Monrad E Iverson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 08:16
CPC Classifications
E; E02; E02F; E02F9/00; E02F9/20; E02F9/22; E02F9/2246; F; F02; F02D; F02D29/00; F02D29/04
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
134 words
IN A HYDRAULIC CONTROL SYSTEM: (A) AN INTERNAL COMBUSTION ENGINE HAVING A THROTTLE ASSOCIATED THEREWITH; (B) A PUMP DRIVEN BY SAID ENGINE; (C) A FLUID MOTOR OPERABLE BY SAID PUMP; AND (D) MEANS RESPONSIVE TO THE PRESSURE SUPPLIED SAID FLUID MOTOR FOR ACTUATING SAID THROTTLE IN ACCORDANCE WITH SAID PRESSURE TO INCREASE THE SPEED OF SAID ENGINE TO CAUSE SAID PUMP TO PROVIDE A SUFFICIENT DISCHARGE PRESSURE TO OPERATE SAID FLUID MOTOR, SAID PRESSURE RESPONSIVE MEANS INCLUDING: (1) A CYLINDER; (2) A PISTON RECIPROCABLE IN SAID CYLINDER MOVABLE IN A DIRECTION TO ACTUATE SAID THROTTLE TO INCREASE THE SPEED OF SAID ENGINE; AND (3) SPRING MEANS BIASING SAID PISTON IN AN OPPOSITE DIRECTION TO CLOSE SAID THROTTLE, THE SPRING MEANS INCLUDING A FIRST RELATIVELY LIGHT COIL SPRING, AND A SECOND RELATIVELY HEAVY COIL SPRING.
Claim 2
Dependent Claim
134 words
IN A HYDRAULIC CONTROL SYSTEM: (A) AN INTERNAL COMBUSTION ENGINE HAVING A THROTTLE ASSOCIATED THEREWITH; (B) A PUMP DRIVEN BY SAID ENGINE; (C) A FLUID MOTOR OPERABLE BY SAID PUMP; AND (D) MEANS RESPONSIVE TO THE PRESSURE SUPPLIED SAID FLUID MOTOR FOR ACTUATING SAID THROTTLE IN ACCORDANCE WITH SAID PRESSURE TO INCREASE THE SPEED OF SAID ENGINE TO CAUSE SAID PUMP TO PROVIDE A SUFFICIENT DISCHARGE PRESSURE TO OPERATE SAID FLUID MOTOR, SAID PRESSURE RESPONSIVE MEANS INCLUDING: (1) A CYLINDER; (2) A PISTON RECIPROCABLE IN SAID CYLINDER MOVABLE IN A DIRECTION TO ACTUATE SAID THROTTLE TO INCREASE THE SPEED OF SAID ENGINE; AND (3) SPRING MEANS BIASING SAID PISTON IN AN OPPOSITE DIRECTION TO CLOSE SAID THROTTLE, THE SPRING MEANS INCLUDING A FIRST RELATIVELY LIGHT COIL SPRING, AND A SECOND RELATIVELY HEAVY COIL SPRING.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1968-11-01 | 1969-05-03 | 1969-11-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-11-01 | 1973-05-03 | 1973-11-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-11-01 | 1977-05-03 | 1977-11-02 | $7700.00 | Window Closed / Lapsed |