Patent DE451395C successfully refreshed from Google Patents.
Patent US3358732A successfully refreshed from Google Patents.
US3358732A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Apparatus for valve checking
Assignee: North American Manufacturing Co
•
Filing: 1965-04-30
•
Granted: 1967-12-19
•
Expires: 1985-04-30
Abstract
No abstract record available.
Inventors
- 👤 Richard W Stuart
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 16:15
CPC Classifications
G; G01; G01M; G01M3/00; G01M3/02; G01M3/04; G01M3/16; G01M3/18; G01M3/184; F; F01; F01L; F01L1/00; F01L1/46; F23; F23N; F23N5/00; F23N5/22; G01M3/26; G01M3/28; G01M3/2876; F23N2227/00; F23N2227/04; F23N2227/06; F23N2231/00; F23N2231/18; F23N2233/00; F23N2233/06
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
107 words
AN APPARATUS FOR CHECKING THE OPERATION OF A FLUID FLOW CONTROLLING VALUE MEANS, COMPRISING VALVE CHECKING MEANS FOR AUTOMATICALLY DETECTING A DEFECT IN THE OPERATION OF SAID VALVE MEANS, SAID VALVE MEANS COMPRISING THREE VALVES INCLUDING A CONDUIT, AN UPSTREAM VALVE AND A DOWNSTREAM VALVE CONNECTED TO CONTROL IN SERIES FLOW THROUGH SAID CONDUIT, A VENT VALVE CONNECTED IN FLUID COMMUNICATION WITH SAID CONDUIT BETWEEN SAID UPSTREAM AND DOWNSTREAM VALVES FOR SELECTIVELY SEALING OR VENTING SAID CONDUIT, AND MEANS FOR MOVING ONE OF SAID VALVES OTHER THAN THE DOWNSTREAM VALVE BETWEEN OPEN AND CLOSED POSITIONS IN TIMED SEQUENCE WITH MOVEMENT OF SAID DOWNSTREAM VALVE BETWEEN THESE POSITIONS.
Claim 2
Independent Claim
107 words
AN APPARATUS FOR CHECKING THE OPERATION OF A FLUID FLOW CONTROLLING VALUE MEANS, COMPRISING VALVE CHECKING MEANS FOR AUTOMATICALLY DETECTING A DEFECT IN THE OPERATION OF SAID VALVE MEANS, SAID VALVE MEANS COMPRISING THREE VALVES INCLUDING A CONDUIT, AN UPSTREAM VALVE AND A DOWNSTREAM VALVE CONNECTED TO CONTROL IN SERIES FLOW THROUGH SAID CONDUIT, A VENT VALVE CONNECTED IN FLUID COMMUNICATION WITH SAID CONDUIT BETWEEN SAID UPSTREAM AND DOWNSTREAM VALVES FOR SELECTIVELY SEALING OR VENTING SAID CONDUIT, AND MEANS FOR MOVING ONE OF SAID VALVES OTHER THAN THE DOWNSTREAM VALVE BETWEEN OPEN AND CLOSED POSITIONS IN TIMED SEQUENCE WITH MOVEMENT OF SAID DOWNSTREAM VALVE BETWEEN THESE POSITIONS.
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) | 1970-12-18 | 1971-06-19 | 1971-12-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-12-18 | 1975-06-19 | 1975-12-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-12-18 | 1979-06-19 | 1979-12-19 | $7700.00 | Window Closed / Lapsed |