US3217851A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Fluid-actuated rotating clutch
Assignee: Caterpillar Inc
•
Filing: 1962-01-23
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Granted: 1965-11-16
•
Expires: 1982-01-23
Abstract
No abstract record available.
Inventors
- 👤 Karl J Mogk
- 👤 Seth P Nordling
- 👤 Charles A Ramsel
- 👤 Gerald D Rohweder
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 11:25
CPC Classifications
F; F16; F16D; F16D25/00; F16D25/06
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
105 words
IN A HYDRAULICALLY OPERATED, ROTATING CLUTCH HAVING A CHAMBER FOR A QUANTITY OF FLUID ACTING TO INDUCE CLUTCH ENGAGEMENT DURING CONTINUED CLUTCH ROTATION AFTER REDUCTION OF THE SUPPLY PRESSURE OF SAID FLUID, THE COMBINATION COMPRISING: MEANS FORMING AN ANNULAR COMPARTMENT INDEPENDENT OF SAID CHAMBER AND CONCENTRIC WITH SAID CLUTCH AND ROTATING WITH THE SAME; AND MEANS FOR SUPPLYING SAID COMPARTMENT WITH A LOW PRESSURE FLUID INDEPENDENT OF SAID FIRST-NAMED FLUID AND COUNTERACTING, BY VIRTUE OF THE CENTRIFUGAL FORCE OF SAID LOW PRESSURE FLUID IN SAID COMPARTMENT WHEN SAID CLUTCH ROTATES, THE FORCE OF SAID FIRST-NAMED FLUID DURING SAID ROTATION OF THE CLUTCH AFTER SAID REDUCTION.
Claim 2
Dependent Claim
105 words
IN A HYDRAULICALLY OPERATED, ROTATING CLUTCH HAVING A CHAMBER FOR A QUANTITY OF FLUID ACTING TO INDUCE CLUTCH ENGAGEMENT DURING CONTINUED CLUTCH ROTATION AFTER REDUCTION OF THE SUPPLY PRESSURE OF SAID FLUID, THE COMBINATION COMPRISING: MEANS FORMING AN ANNULAR COMPARTMENT INDEPENDENT OF SAID CHAMBER AND CONCENTRIC WITH SAID CLUTCH AND ROTATING WITH THE SAME; AND MEANS FOR SUPPLYING SAID COMPARTMENT WITH A LOW PRESSURE FLUID INDEPENDENT OF SAID FIRST-NAMED FLUID AND COUNTERACTING, BY VIRTUE OF THE CENTRIFUGAL FORCE OF SAID LOW PRESSURE FLUID IN SAID COMPARTMENT WHEN SAID CLUTCH ROTATES, THE FORCE OF SAID FIRST-NAMED FLUID DURING SAID ROTATION OF THE CLUTCH AFTER SAID REDUCTION.
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US2381786A
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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) | 1968-11-15 | 1969-05-17 | 1969-11-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-11-15 | 1973-05-17 | 1973-11-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-11-15 | 1977-05-17 | 1977-11-16 | $7700.00 | Window Closed / Lapsed |