US3334896A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Slide valve with multiple ports
Assignee: Unisys Corp
•
Filing: 1963-12-02
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Granted: 1967-08-08
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Expires: 1983-12-02
Abstract
No abstract record available.
Inventors
- 👤 James L Mullin
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 23:44
CPC Classifications
B; B65; B65H; B65H3/00; B65H3/08; B65H3/0808; B65H3/0891; Y; Y10; Y10T; Y10T137/00; Y10T137/8593; Y10T137/86493; Y10T137/86718; Y10T137/86759
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
142 words
A VALVE MECHANISM COMPRISING, A HOUSING PROVIDED WITH A FLUID CHAMBER AND A PORT OPENING AT ONE END INTO AN OUTSIDE SURFACE OF SAID HOUSING AND TERMINATING AT ITS OTHER END IN AN ENLARGED ORIFICE IN THE FORM OF A RECESS IN SAID FLUID CHAMBER, SAID ORIFICE HAVING AN AREA WHICH EXCEEDS THE CROSS-SECTIONAL AREA OF SAID PORT AND HAVING A SEALING PORTION AT ITS PERIPHER, A SLIDE VALVE HAVING A SEALING FACE FOR CONTACTING SAID SEALING PORTION AND THEREBY SEALING SAID ORIFICE WHEN THE SLIDE VALVE IS IN A FIRST POSITION, AND MEANS FOR MOVING SAID SLIDE VALVE TO A SECOND POSITION THROUGH A DISTANCE LESS THAN THE TRANSVERSE DIMENSION OF SAID PORT TAKEN IN THE DIRECTION OF MOVEMENT OF SAID SLIDE VALVE TO UNCOVER SAID ORIFICE TO AN EXTENT IN AREA SUBSTANTIALLY EQUAL TO THE CROSS-SECTIONAL AREA OF SAID PORT.
Claim 2
Dependent Claim
142 words
A VALVE MECHANISM COMPRISING, A HOUSING PROVIDED WITH A FLUID CHAMBER AND A PORT OPENING AT ONE END INTO AN OUTSIDE SURFACE OF SAID HOUSING AND TERMINATING AT ITS OTHER END IN AN ENLARGED ORIFICE IN THE FORM OF A RECESS IN SAID FLUID CHAMBER, SAID ORIFICE HAVING AN AREA WHICH EXCEEDS THE CROSS-SECTIONAL AREA OF SAID PORT AND HAVING A SEALING PORTION AT ITS PERIPHER, A SLIDE VALVE HAVING A SEALING FACE FOR CONTACTING SAID SEALING PORTION AND THEREBY SEALING SAID ORIFICE WHEN THE SLIDE VALVE IS IN A FIRST POSITION, AND MEANS FOR MOVING SAID SLIDE VALVE TO A SECOND POSITION THROUGH A DISTANCE LESS THAN THE TRANSVERSE DIMENSION OF SAID PORT TAKEN IN THE DIRECTION OF MOVEMENT OF SAID SLIDE VALVE TO UNCOVER SAID ORIFICE TO AN EXTENT IN AREA SUBSTANTIALLY EQUAL TO THE CROSS-SECTIONAL AREA OF SAID PORT.
References Cited (Backward Citations)
US300372A
Cited
US1550725A
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 |