US3198212A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Metering slot configuration for hydraulic control valves
Assignee: Caterpillar Inc
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Filing: 1963-05-22
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Granted: 1965-08-03
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Expires: 1983-05-22
Abstract
No abstract record available.
Inventors
- 👤 John A Junck
- 👤 James E Scheidt
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 20:08
CPC Classifications
F; F16; F16K; F16K11/00; F16K11/02; F16K11/06; F16K11/065; F16K11/07; F16K11/0708; Y; Y10; Y10T; Y10T137/00; Y10T137/8593; Y10T137/86493; Y10T137/86574; Y10T137/8667; Y10T137/86694; Y10T137/8671; Y10T137/86718; Y10T137/86759; Y10T137/86791
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
58 words
IN A CONTROL VALVE HVING A PORTED BORE AND A SPOOL WITH LANDS SEPARATED BY GROOVES RECIPROCABLE IN THE BORE FOR CONTROLLING FLUID FLOW THROUGH THE PORTS, METERING SLOTS BRIDGING SAID LANDS AND GROOVES AND HAVING A SUBSTANTIALLY SEMI-CYLINDRICAL CONFIGURATION ORINGINATING FROM A CENTER DISPOSED WITHIN A GROOVE AND SPACED INWARDLY FROM THE OUTER DIAMETER OF THE LANDS.
Claim 2
Dependent Claim
58 words
IN A CONTROL VALVE HVING A PORTED BORE AND A SPOOL WITH LANDS SEPARATED BY GROOVES RECIPROCABLE IN THE BORE FOR CONTROLLING FLUID FLOW THROUGH THE PORTS, METERING SLOTS BRIDGING SAID LANDS AND GROOVES AND HAVING A SUBSTANTIALLY SEMI-CYLINDRICAL CONFIGURATION ORINGINATING FROM A CENTER DISPOSED WITHIN A GROOVE AND SPACED INWARDLY FROM THE OUTER DIAMETER OF THE LANDS.
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) | 1968-08-02 | 1969-02-01 | 1969-08-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-08-02 | 1973-02-01 | 1973-08-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-08-02 | 1977-02-01 | 1977-08-03 | $7700.00 | Window Closed / Lapsed |