Patent US3391708A successfully refreshed from Google Patents.
US3391708A
Expired / Lapsed
US
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Valve
Assignee: SPX Technologies Inc
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Filing: 1966-02-23
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Granted: 1968-07-09
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Expires: 1986-02-23
Abstract
No abstract record available.
Inventors
- 👤 Orval L Rice
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 14:26
CPC Classifications
F; F15; F15B; F15B13/00; F15B13/02; F15B13/04; Y; Y10; Y10T; Y10T137/00; Y10T137/8593; Y10T137/86493; Y10T137/86574; Y10T137/8667; Y10T137/86694; Y10T137/8671; Y10T137/87169; Y10T137/87233; Y10T137/87241
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
105 words
A DIRECTIONAL CONTROL VALVE INCLUDING A HOUSING CONTAINING (A) INLET AND EXHAUST PASSAGES AND FIRST AND SECOND MOTOR PASSAGES; (B) A MOVABLE VALVING ELEMENT HAVING A FIRST POSITION IN WHICH IT CONNECTS THE FIRST AND SECOND MOTOR PASSAGES WITH THE INLET AND EXHAUST PASSAGES, REPECTIVELY, AND A SECOND POSITION IN WHICH THE CONNECTIONS BETWEEN THE MOTOR PASSAGES AND THE OTHER TWO PASSAGES ARE REVERSED, THE VALVING ELEMENT CONTAINING A LOAD DROP CHECK VALVE WHICH PREVENTS FLOW FROM THE FIRST MOTOR PASSAGE TO THE INLET PASSAGE IN SAID FIRST POSITION AND RESTRICTS FLOW FROM THE FIRST MOTOR PASSAGE TO THE EXHAUST PASSAGE IN THE SECOND POSITION;
Claim 2
Dependent Claim
105 words
A DIRECTIONAL CONTROL VALVE INCLUDING A HOUSING CONTAINING (A) INLET AND EXHAUST PASSAGES AND FIRST AND SECOND MOTOR PASSAGES; (B) A MOVABLE VALVING ELEMENT HAVING A FIRST POSITION IN WHICH IT CONNECTS THE FIRST AND SECOND MOTOR PASSAGES WITH THE INLET AND EXHAUST PASSAGES, REPECTIVELY, AND A SECOND POSITION IN WHICH THE CONNECTIONS BETWEEN THE MOTOR PASSAGES AND THE OTHER TWO PASSAGES ARE REVERSED, THE VALVING ELEMENT CONTAINING A LOAD DROP CHECK VALVE WHICH PREVENTS FLOW FROM THE FIRST MOTOR PASSAGE TO THE INLET PASSAGE IN SAID FIRST POSITION AND RESTRICTS FLOW FROM THE FIRST MOTOR PASSAGE TO THE EXHAUST PASSAGE IN THE SECOND POSITION;
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) | 1971-07-09 | 1972-01-08 | 1972-07-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-07-09 | 1976-01-08 | 1976-07-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-07-09 | 1980-01-08 | 1980-07-09 | $7700.00 | Window Closed / Lapsed |