US3381706A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Roll-on gate valve
Assignee: Individual
•
Filing: 1964-06-24
•
Granted: 1968-05-07
•
Expires: 1984-06-24
Abstract
No abstract record available.
Inventors
- 👤 Edward L Hendey
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 11:12
CPC Classifications
F; F16; F16K; F16K3/00; F16K3/02; F16K3/0218; Y; Y10; Y10S; Y10S251/00; Y10S251/901; Y10T; Y10T137/00; Y10T137/2496; Y10T137/2514; Y10T137/2534; Y10T137/2536; Y10T137/7287; Y10T137/7313; Y10T137/7323; Y10T137/7358; Y10T137/7404; Y10T137/7423; Y10T137/7439; Y10T137/7494; Y10T137/8593; Y10T137/86493; Y10T137/86718
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
159 words
A GATE VALVE COMPRISING IN COMBINATION: A FLUID DUCT HAVING AN INLET ORIFICE SURROUNDED ON THE UPSTREAM SIDE THEREOF BY A SURFACE LYING SUBSTANTIALLY IN A SINGLE PLANE; A CARRIAGE MOVABLE RELATIVE TO THE ORIFICE; A PAIR OF SPACED PARALLEL ROLLS ROTATABLY MOUNTED ON THE CARRIAGE; AN EXTENDED SURFACE, FLUID IMPERVIOUS, ENDLESS, FLEXIBLE BELT UPSTREAM FROM SAID ORIFICE AND PASSING AROUND THE ROLLS, A SURFACE ON ONE RUN OF THE BELT LYING SUBSTANTIALLY IN SAID PLANE AND SEALINGLY ENGAGEABLE WITH THE FIRST MENTIONED SURFACE IN RESPONSE TO FLUID PRESSURE EXERTED OVER AN EXTENDED SURFACE ON THE ONE RUN OF THE BELT BY FLUID UPSTREAM FROM SAID ORIFICE AND SAID BELT; MEANS FOR POSITIVELY POSITIONING THE CARRIAGE AND BELT RELATIVE TO THE ORIFICE TO REGULATE FLUID FLOW THROUGH THE ORIFICE; AND MEANS FOR GUIDING SAID CARRIAGE IN A DIRECTION PARALLEL TO SAID PLANE TO ROLL THE BELT OVER THE SURFACE AND ACROSS THE ORIFICE TO COVER OR UNCOVER THE ORIFICE.
Claim 2
Dependent Claim
159 words
A GATE VALVE COMPRISING IN COMBINATION: A FLUID DUCT HAVING AN INLET ORIFICE SURROUNDED ON THE UPSTREAM SIDE THEREOF BY A SURFACE LYING SUBSTANTIALLY IN A SINGLE PLANE; A CARRIAGE MOVABLE RELATIVE TO THE ORIFICE; A PAIR OF SPACED PARALLEL ROLLS ROTATABLY MOUNTED ON THE CARRIAGE; AN EXTENDED SURFACE, FLUID IMPERVIOUS, ENDLESS, FLEXIBLE BELT UPSTREAM FROM SAID ORIFICE AND PASSING AROUND THE ROLLS, A SURFACE ON ONE RUN OF THE BELT LYING SUBSTANTIALLY IN SAID PLANE AND SEALINGLY ENGAGEABLE WITH THE FIRST MENTIONED SURFACE IN RESPONSE TO FLUID PRESSURE EXERTED OVER AN EXTENDED SURFACE ON THE ONE RUN OF THE BELT BY FLUID UPSTREAM FROM SAID ORIFICE AND SAID BELT; MEANS FOR POSITIVELY POSITIONING THE CARRIAGE AND BELT RELATIVE TO THE ORIFICE TO REGULATE FLUID FLOW THROUGH THE ORIFICE; AND MEANS FOR GUIDING SAID CARRIAGE IN A DIRECTION PARALLEL TO SAID PLANE TO ROLL THE BELT OVER THE SURFACE AND ACROSS THE ORIFICE TO COVER OR UNCOVER THE ORIFICE.
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) | 1971-05-07 | 1971-11-06 | 1972-05-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-05-07 | 1975-11-06 | 1976-05-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-05-07 | 1979-11-06 | 1980-05-07 | $7700.00 | Window Closed / Lapsed |