Patent US3216443A successfully refreshed from Google Patents.
US3216443A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Multiple spool valve assembly
Assignee: Parker Hannifin Corp
•
Filing: 1963-03-11
•
Granted: 1965-11-09
•
Expires: 1983-03-11
Abstract
No abstract record available.
Inventors
- 👤 Herbert H Schmiel
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 09:23
CPC Classifications
F; F16; F16K; F16K27/00; F16K27/04; F15; F15B; F15B13/00; F15B13/02; F15B13/06; F15B13/08; Y; Y10; Y10T; Y10T137/00; Y10T137/5109; Y10T137/7722; Y10T137/7758; Y10T137/7762; Y10T137/7764; Y10T137/7766; Y10T137/8593; Y10T137/87169; Y10T137/87177; Y10T137/87185; Y10T29/00; Y10T29/49; Y10T29/49405; Y10T29/49412
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
182 words
A HOUSING FOR A SPOOL VALVE ASSEMBLY HAVING (A) AT LEAST TWO SPOOL BORES FOR RECIPROCATION OF VALVE SPOOLS THEREIN, (B) A BYPASS PASSAGE INTERSECTING BOTH SPOOL BORES AND ADAPTED FOR CONNECTION WITH A FLUID PRESSURE SOURCE AND WITH A FLUID RESERVOIR AT ITS RESPECTIVE ENDS, (C) PRESSURE FEED PASSAGES INTERSECTING THE RESPECTIVE SPOOL BORES AND HAVING EXTENSIONS COMMUNICATING WITH SAID BYPASS PASSAGE UPSTREAM OF THE RESPECTIVE SPOOL BORES, (D) MOTOR PASSAGES INTERSECTING THE RESPECTIVE SPOOL BORES FOR CONNECTION WITH FLUID MOTORS, AND (E) RETURN PASSAGES INTERSECTING THE RESPECTIVE SPOOL BORES LEADING TO THE PRESSURE END OF SAID BYPASS PASSAGE, SAID HOUSING FURTHER HAVING ADDITIONAL PASSAGES CONNECTING THE PRESSURE END OF SAID BYPASS PASSAGE WITH AT LEAST ONE PRESSURE FEED PASSAGE OF THE DOWNSTREAM SPOOL BORE, AND AT LEAST ONE SLEEVE MEANS INSERTED IN ONE OF SAID ADDITIONAL PASSAGES OPERATIVE TO ISOLATE THE PRESSURE FEED EXTENSION OF SAID DOWNSTREAM SPOOL BORE FROM SAID BYPASS PASSAGE EXCEPT THROUGH SAID ADDITIONAL PASSAGES, WHEREBY VALVE SPOOLS IN SAID SPOOL BORES MAY BE SELECTIVELY OPERATED ONE AT A TIME OR SIMULTANEOUSLY TO CONTROL THE RESPECTIVE MOTORS.
Claim 2
Dependent Claim
182 words
A HOUSING FOR A SPOOL VALVE ASSEMBLY HAVING (A) AT LEAST TWO SPOOL BORES FOR RECIPROCATION OF VALVE SPOOLS THEREIN, (B) A BYPASS PASSAGE INTERSECTING BOTH SPOOL BORES AND ADAPTED FOR CONNECTION WITH A FLUID PRESSURE SOURCE AND WITH A FLUID RESERVOIR AT ITS RESPECTIVE ENDS, (C) PRESSURE FEED PASSAGES INTERSECTING THE RESPECTIVE SPOOL BORES AND HAVING EXTENSIONS COMMUNICATING WITH SAID BYPASS PASSAGE UPSTREAM OF THE RESPECTIVE SPOOL BORES, (D) MOTOR PASSAGES INTERSECTING THE RESPECTIVE SPOOL BORES FOR CONNECTION WITH FLUID MOTORS, AND (E) RETURN PASSAGES INTERSECTING THE RESPECTIVE SPOOL BORES LEADING TO THE PRESSURE END OF SAID BYPASS PASSAGE, SAID HOUSING FURTHER HAVING ADDITIONAL PASSAGES CONNECTING THE PRESSURE END OF SAID BYPASS PASSAGE WITH AT LEAST ONE PRESSURE FEED PASSAGE OF THE DOWNSTREAM SPOOL BORE, AND AT LEAST ONE SLEEVE MEANS INSERTED IN ONE OF SAID ADDITIONAL PASSAGES OPERATIVE TO ISOLATE THE PRESSURE FEED EXTENSION OF SAID DOWNSTREAM SPOOL BORE FROM SAID BYPASS PASSAGE EXCEPT THROUGH SAID ADDITIONAL PASSAGES, WHEREBY VALVE SPOOLS IN SAID SPOOL BORES MAY BE SELECTIVELY OPERATED ONE AT A TIME OR SIMULTANEOUSLY TO CONTROL THE RESPECTIVE MOTORS.
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) | 1968-11-08 | 1969-05-10 | 1969-11-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-11-08 | 1973-05-10 | 1973-11-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-11-08 | 1977-05-10 | 1977-11-09 | $7700.00 | Window Closed / Lapsed |