US3255772A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Rotary slide gate valve
Assignee: United Conveyor Corp
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Filing: 1964-01-09
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Granted: 1966-06-14
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Expires: 1984-01-09
Abstract
No abstract record available.
Inventors
- 👤 Orville A Williams
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 21:14
CPC Classifications
B; B65; B65G; B65G53/00; B65G53/34; B65G53/52; Y; Y10; Y10T; Y10T137/00; Y10T137/6851; Y10T137/7036
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
83 words
A ROTARY SLIDE GATE VALVE FOR USE IN A PNEUMATIC CONVEYOR SYSTEM COMPRISING: A PAIR OF SPACED, FACING VALVE PLATES HAVING AXIALLY ALIGNED OPENINGS; A GATE SLIDABLY MOUNTED BETWEEN SAID VALVE PLATES AND HAVING AN OPENING ADAPTED TO BE MOVED INTO AND OUT OF AXIAL ALIGNMENT WITH SAID VALVE PLATE OPENINGS; MEANS FOR MOVIGN SAID GATE; A GASKET SPANNING SAID VALVE PLATES AND EXTENDING PERIPHERALLY THEREAROUND; AND TAKE-UP MEANS SURROUNDING SAID GASKET FOR PRESSING SAID GASKET INTO SEALING ENGAGEMENT WITH SAID VALVE PLATES.
Claim 2
Dependent Claim
83 words
A ROTARY SLIDE GATE VALVE FOR USE IN A PNEUMATIC CONVEYOR SYSTEM COMPRISING: A PAIR OF SPACED, FACING VALVE PLATES HAVING AXIALLY ALIGNED OPENINGS; A GATE SLIDABLY MOUNTED BETWEEN SAID VALVE PLATES AND HAVING AN OPENING ADAPTED TO BE MOVED INTO AND OUT OF AXIAL ALIGNMENT WITH SAID VALVE PLATE OPENINGS; MEANS FOR MOVIGN SAID GATE; A GASKET SPANNING SAID VALVE PLATES AND EXTENDING PERIPHERALLY THEREAROUND; AND TAKE-UP MEANS SURROUNDING SAID GASKET FOR PRESSING SAID GASKET INTO SEALING ENGAGEMENT WITH SAID VALVE PLATES.
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) | 1969-06-13 | 1969-12-13 | 1970-06-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-06-13 | 1973-12-13 | 1974-06-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-06-13 | 1977-12-13 | 1978-06-14 | $7700.00 | Window Closed / Lapsed |