US3334705A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Priority valve for closed center system
Assignee: International Motors LLC
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Filing: 1965-08-06
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Granted: 1967-08-08
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Expires: 1985-08-06
Abstract
No abstract record available.
Inventors
- 👤 John S Lam
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 21:49
CPC Classifications
F; F15; F15B; F15B11/00; F15B11/16; F15B13/00; F15B13/02; F15B13/022; F16; F16K; F16K11/00; F16K11/02; F16K11/06; F16K11/065; F16K11/07; F16K11/0716; F15B2211/00; F15B2211/20; F15B2211/205; F15B2211/2053; F15B2211/20546; F15B2211/20553; F15B2211/25; F15B2211/40; F15B2211/405; F15B2211/40515; F15B2211/45; F15B2211/455; F15B2211/50; F15B2211/505; F15B2211/50509; F15B2211/50518; F15B2211/70; F15B2211/705; F15B2211/7051; F15B2211/7053; F15B2211/7054; F15B2211/71; F15B2211/78; F15B2211/781; Y; Y10; Y10T; Y10T137/00; Y10T137/2496; Y10T137/2559; Y10T137/265; Y10T137/2663
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
348 words
A FLOW DIVIDER VALVE COMPRISING: A VALVE BODY HAVING A BORE THEREIN, AN INLET PORT IN SAID BODY HAVING FIRST AND SECOND INLET PASSAGES COMMUNICATING WITH SAID BORE AT AXIALLY SPACED LOCATIONS, A PRIORITY OUTLET COMMUNICATING WITH SAID BORE PROXIMATE ONE END THEREOF, FIRST AND SECOND AUXILIARY OUTLETS COMMUNICATING WITH SAID BORE AT AXIALLY SPACED LOCATIONS STRADDLING SAID SECOND INLET PASSAGE PROXIMATE ANOTHER END OF SAID BORE, SAID FIRST INLET PASSAGE HAVING AN ORIFICE THEREIN AND COMMUNICATING WITH SAID BORE AT A POSITION INTERMEDIATE SAID PRIORITY OUTLET AND SAID FIRST AUXILIARY OUTLET, A VALVE SPOOL MOVABLE IN SAID BORE AND HAVING FIRST, SECOND AND THIRD LANDS AND FIRST AND SECOND GROOVE PORTIONS INTERMEDIATE SAID LANDS, SAID VALVE SPOOL HAVING FIRST PASSAGE MEANS THEREIN COMMUNICATING SAID FIRST INLET PASSAGE WITH ONE END OF SAID BORE, SAID VALVE BODY HAVING SECOND PASSAGE MEANS THEREIN COMMUNICATING SAID INLET PORT WITH ANOTHER ENDOF SAID BORE, SAID ORIFICE ESTABLISHING A PRESSURE DIFFERENTIAL BETWEEN THE ENDS OF SAID BORE TO SHIFT SAID SPOOL RESPONSIVE TO SAID PRESSURE DIFFERENTIAL: SAID VALVE SPOOL HAVING A FIRST LIMIT OF MOVEMENT WHEREIN SAID SECOND LAND RESTRICTS COMMUNICATION BETWEEN SAID FIRST INLET PASSAGE AND SAID PRIORITY OUTLET AND ESTABLISHES COMMUNICATION BETWEEN SAID SECOND INLET PASSAGE AND SAID FIRST AUXILIARY OUTLET AROUND SAID SECOND GROOVE PORTION, SAID VALVE SPOOL HAVING A SECOND LIMIT OF MOVEMENT WHEREIN SAID SECOND LAND PORTION OPENS COMMUNICATION BETWEEN SAID FIRST INLET PASSAGE AND SAID PRIORITY OUTLET AND OPENS COMMUNICATION BETWEEN SAID SECOND INLET PASSAGE AND SAID SECOND AUXILIARY OUTLET, SAID FIRST LAND PORTION HAVING AT LEAST ONE FLAT PORTION ON THE SURFACE THEREOF COMMUNICATING SAID FIRST INLET PASSAGE WITH SAID PRIORITY OUTLET AROUND SAID FIRST GROOVE PORTION WHEN SAID VALVE SPOOL IS IN ITS FIRST LIMIT OF MOVEMENT, A SPRING IN SAID BORE BIASING SAID VALVE SPOOL TOWARD ITS SECOND LIMIT OF MOVEMENT, SAID SPOOL HAVING AN INTERMEDIATE POSITION WHEREIN SAID SECOND LAND OPENS COMMUNICATION OF SAID FIRST INLET PASSAGE WITH SAID PRIORITY OUTLET AND SAID SECOND AND THIRD LAND RESPECTIVELY BLOCK COMMUNICATION BETWEEN SAID SECOND INLET PASSAGE AND SAID FIRST AND SECOND AUXILIARY OUTLETS.
Claim 2
Dependent Claim
348 words
A FLOW DIVIDER VALVE COMPRISING: A VALVE BODY HAVING A BORE THEREIN, AN INLET PORT IN SAID BODY HAVING FIRST AND SECOND INLET PASSAGES COMMUNICATING WITH SAID BORE AT AXIALLY SPACED LOCATIONS, A PRIORITY OUTLET COMMUNICATING WITH SAID BORE PROXIMATE ONE END THEREOF, FIRST AND SECOND AUXILIARY OUTLETS COMMUNICATING WITH SAID BORE AT AXIALLY SPACED LOCATIONS STRADDLING SAID SECOND INLET PASSAGE PROXIMATE ANOTHER END OF SAID BORE, SAID FIRST INLET PASSAGE HAVING AN ORIFICE THEREIN AND COMMUNICATING WITH SAID BORE AT A POSITION INTERMEDIATE SAID PRIORITY OUTLET AND SAID FIRST AUXILIARY OUTLET, A VALVE SPOOL MOVABLE IN SAID BORE AND HAVING FIRST, SECOND AND THIRD LANDS AND FIRST AND SECOND GROOVE PORTIONS INTERMEDIATE SAID LANDS, SAID VALVE SPOOL HAVING FIRST PASSAGE MEANS THEREIN COMMUNICATING SAID FIRST INLET PASSAGE WITH ONE END OF SAID BORE, SAID VALVE BODY HAVING SECOND PASSAGE MEANS THEREIN COMMUNICATING SAID INLET PORT WITH ANOTHER ENDOF SAID BORE, SAID ORIFICE ESTABLISHING A PRESSURE DIFFERENTIAL BETWEEN THE ENDS OF SAID BORE TO SHIFT SAID SPOOL RESPONSIVE TO SAID PRESSURE DIFFERENTIAL: SAID VALVE SPOOL HAVING A FIRST LIMIT OF MOVEMENT WHEREIN SAID SECOND LAND RESTRICTS COMMUNICATION BETWEEN SAID FIRST INLET PASSAGE AND SAID PRIORITY OUTLET AND ESTABLISHES COMMUNICATION BETWEEN SAID SECOND INLET PASSAGE AND SAID FIRST AUXILIARY OUTLET AROUND SAID SECOND GROOVE PORTION, SAID VALVE SPOOL HAVING A SECOND LIMIT OF MOVEMENT WHEREIN SAID SECOND LAND PORTION OPENS COMMUNICATION BETWEEN SAID FIRST INLET PASSAGE AND SAID PRIORITY OUTLET AND OPENS COMMUNICATION BETWEEN SAID SECOND INLET PASSAGE AND SAID SECOND AUXILIARY OUTLET, SAID FIRST LAND PORTION HAVING AT LEAST ONE FLAT PORTION ON THE SURFACE THEREOF COMMUNICATING SAID FIRST INLET PASSAGE WITH SAID PRIORITY OUTLET AROUND SAID FIRST GROOVE PORTION WHEN SAID VALVE SPOOL IS IN ITS FIRST LIMIT OF MOVEMENT, A SPRING IN SAID BORE BIASING SAID VALVE SPOOL TOWARD ITS SECOND LIMIT OF MOVEMENT, SAID SPOOL HAVING AN INTERMEDIATE POSITION WHEREIN SAID SECOND LAND OPENS COMMUNICATION OF SAID FIRST INLET PASSAGE WITH SAID PRIORITY OUTLET AND SAID SECOND AND THIRD LAND RESPECTIVELY BLOCK COMMUNICATION BETWEEN SAID SECOND INLET PASSAGE AND SAID FIRST AND SECOND AUXILIARY OUTLETS.
References Cited (Backward Citations)
US818711A
Cited
US3099284A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1970-08-07 | 1971-02-06 | 1971-08-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-08-07 | 1975-02-06 | 1975-08-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-08-07 | 1979-02-06 | 1979-08-08 | $7700.00 | Window Closed / Lapsed |