US3083777A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Hydraulic lift control mechanism
Assignee: International Motors LLC
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Filing: 1960-08-11
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Granted: 1963-04-02
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Expires: 1980-08-11
Abstract
No abstract record available.
Inventors
- 👤 Maughan John
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 19:04
CPC Classifications
A; A01; A01B; A01B63/00; A01B63/02; A01B63/10; A01B63/111; A01B63/1117
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
331 words
IN A TRACTOR HAVING IMPLEMENT-ATTACHING MECHANISM FOR SUPPORTABLY ATTACHING AN IMPLEMENT THERETO, A POWER LIFT MEANS OPERABLE FOR RAISING AND LOWERING SAID IMPLEMENT, AN ACTUATOR ELEMENT FOR CONTROLLING THE POWER LIFT MEANS, A POSITION-RESPONSIVE MEMBER OPERABLE BY SAID LIFT MEANS ATTENDANT THE RAISING AND LOWERING MOVEMENTS OF THE IMPLEMENT, AND DRAFT-RESPONSIVE MECHANISM WHICH IS SUSCEPTIBLE TO MOVEMENT UPON BEING SUBJECTED TO VARIATIONS IN DRAFT LOADS ON THE IMPLEMENT, THE IMPROVEMENT COMPRISING: A ROTATABLY DISPOSED CONTROL LEVER; A TRACTOR MOUNTED SUPPORT FOR SAID CONTROL LEVER; A DOUBLE-ARMED LEVER HAVING ONE ARM ENGAGEABLE WITH SAID POSITION-RESPONSIVE MEMBER AND THE OTHER ARM THEREOF BEING ENGAGEABLE WITH SAID ACTUATOR ELEMENT; A LEVER ARM ENGAGEABLE WITH SAID DRAFT-RESPONSIVE MECHANISM; SAID CONTROL LEVER HAVING A PORTION THEREON AFFORDING A FULCRUM FOR PIVOTALLY SUPPORTING SAID DOUBLE-ARMED LEVER AND SAID LEVER ARM, AND WHICH FULCRUM IS SHIFTABLE ABOUT THE AXIS OF ROTATION OF SAID CONTROL LEVER; RESILIENT CLUTCH MEANS DISPOSED BETWEEN SAID DOUBLE-ARMED LEVER AND SAID LEVER ARM AND ARRANGED FOR NORMALLY CONSTRAINING SAID DOUBLE-ARMED LEVER FOR MOVEMENT WITH SAID LEVER BUT BEING YIELDABLE TO PERMIT RELATIVE ROTATIVE MOVEMENT THEREBETWEEN; SAID CONTROL LEVER BEING OPERABLY DISPOSED SO THAT IN ONE PORTION OF THE ROTATIVE RANGE OF TRAVEL THEREOF SAID ONE ARM OF SAID DOUBLE-ARMED LEVER IS ENGAGEABLE WITH AND OPERABLY RESPONSIVE TO MOVEMENTS OF SAID POSITION-RESPONSIVE MEMBER WHILE SAID OTHER ARM IS OPERABLY ENGAGEABLE WITH SAID ACTUATOR ELEMENT FOR CONTROLLING THE POWER LIFT MEANS ACCORDING TO MOVEMENTS OF SAID POSITION-RESPONSIVE MEMBER, AND IN ANOTHER PORTION OF THE ROTATIVE RANGE OF TRAVEL OF SAID CONTROL LEVER SAID LEVER ARM IS ENGAGEABLE WITH AND OPERABLY RESPONSIVE TO MOVEMENTS OF SAID DRAFT-RESPONSIVE MEMBER WHILE CONCURRENT THEREWITH SAID OTHER ARM OF SAID DOUBLE-ARMED LEVER IS OPERABLY ENGAGEABLE WITH SAID ACTUATOR ELEMENT FOR CONTROLLING THE POWER LIFT MEANS ACCORDING TO MOVEMENTS OF SAID DRAFT-RESPONSIVE MEMBER; SAID RESILIENT CLUTCH MEANS BEING PROPORTIONED TO ACCOMODATE A PREDETERMINED MOVEMENT OF SAID DRAFT-RESPONSIVE MECHANSIM BEFORE YIELDING AND INTERRUPTING THE TRANSMISSION OF MOTION THERETHROUGH TO PROVIDE OVERLOAD RELEASE THEREFOR.
Claim 2
Dependent Claim
331 words
IN A TRACTOR HAVING IMPLEMENT-ATTACHING MECHANISM FOR SUPPORTABLY ATTACHING AN IMPLEMENT THERETO, A POWER LIFT MEANS OPERABLE FOR RAISING AND LOWERING SAID IMPLEMENT, AN ACTUATOR ELEMENT FOR CONTROLLING THE POWER LIFT MEANS, A POSITION-RESPONSIVE MEMBER OPERABLE BY SAID LIFT MEANS ATTENDANT THE RAISING AND LOWERING MOVEMENTS OF THE IMPLEMENT, AND DRAFT-RESPONSIVE MECHANISM WHICH IS SUSCEPTIBLE TO MOVEMENT UPON BEING SUBJECTED TO VARIATIONS IN DRAFT LOADS ON THE IMPLEMENT, THE IMPROVEMENT COMPRISING: A ROTATABLY DISPOSED CONTROL LEVER; A TRACTOR MOUNTED SUPPORT FOR SAID CONTROL LEVER; A DOUBLE-ARMED LEVER HAVING ONE ARM ENGAGEABLE WITH SAID POSITION-RESPONSIVE MEMBER AND THE OTHER ARM THEREOF BEING ENGAGEABLE WITH SAID ACTUATOR ELEMENT; A LEVER ARM ENGAGEABLE WITH SAID DRAFT-RESPONSIVE MECHANISM; SAID CONTROL LEVER HAVING A PORTION THEREON AFFORDING A FULCRUM FOR PIVOTALLY SUPPORTING SAID DOUBLE-ARMED LEVER AND SAID LEVER ARM, AND WHICH FULCRUM IS SHIFTABLE ABOUT THE AXIS OF ROTATION OF SAID CONTROL LEVER; RESILIENT CLUTCH MEANS DISPOSED BETWEEN SAID DOUBLE-ARMED LEVER AND SAID LEVER ARM AND ARRANGED FOR NORMALLY CONSTRAINING SAID DOUBLE-ARMED LEVER FOR MOVEMENT WITH SAID LEVER BUT BEING YIELDABLE TO PERMIT RELATIVE ROTATIVE MOVEMENT THEREBETWEEN; SAID CONTROL LEVER BEING OPERABLY DISPOSED SO THAT IN ONE PORTION OF THE ROTATIVE RANGE OF TRAVEL THEREOF SAID ONE ARM OF SAID DOUBLE-ARMED LEVER IS ENGAGEABLE WITH AND OPERABLY RESPONSIVE TO MOVEMENTS OF SAID POSITION-RESPONSIVE MEMBER WHILE SAID OTHER ARM IS OPERABLY ENGAGEABLE WITH SAID ACTUATOR ELEMENT FOR CONTROLLING THE POWER LIFT MEANS ACCORDING TO MOVEMENTS OF SAID POSITION-RESPONSIVE MEMBER, AND IN ANOTHER PORTION OF THE ROTATIVE RANGE OF TRAVEL OF SAID CONTROL LEVER SAID LEVER ARM IS ENGAGEABLE WITH AND OPERABLY RESPONSIVE TO MOVEMENTS OF SAID DRAFT-RESPONSIVE MEMBER WHILE CONCURRENT THEREWITH SAID OTHER ARM OF SAID DOUBLE-ARMED LEVER IS OPERABLY ENGAGEABLE WITH SAID ACTUATOR ELEMENT FOR CONTROLLING THE POWER LIFT MEANS ACCORDING TO MOVEMENTS OF SAID DRAFT-RESPONSIVE MEMBER; SAID RESILIENT CLUTCH MEANS BEING PROPORTIONED TO ACCOMODATE A PREDETERMINED MOVEMENT OF SAID DRAFT-RESPONSIVE MECHANSIM BEFORE YIELDING AND INTERRUPTING THE TRANSMISSION OF MOTION THERETHROUGH TO PROVIDE OVERLOAD RELEASE THEREFOR.
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) | 1966-04-01 | 1966-10-01 | 1967-04-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1970-04-01 | 1970-10-01 | 1971-04-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1974-04-01 | 1974-10-01 | 1975-04-02 | $7700.00 | Window Closed / Lapsed |