US3144045A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Internal counterbalanced check valve
Assignee: Charles Wheatley Co
•
Filing: 1963-05-23
•
Granted: 1964-08-11
•
Expires: 1983-05-23
Abstract
No abstract record available.
Inventors
- 👤 John R Fitzpatrick
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 07:28
CPC Classifications
F; F16; F16K; F16K15/00; F16K15/02; F16K15/03; F16K15/034; Y; Y10; Y10T; Y10T137/00; Y10T137/7722; Y10T137/7837; Y10T137/7898; Y10T137/7903
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
132 words
A CHECK VALVE COMPRISING A BODY HAVING OPPOSED INLET AND OUTLET PORTS, A VALVE SEAT PROVIDED IN THE PROXIMITY OF SAID INLET PORT, A CLOSURE MEMBER PIVOTALLY SECURED IN THE BODY IN THE PROXIMITY OF THE VALVE SEAT FOR COOPERATION THEREWITH TO PROVIDE ALTERNATE OPENED AND CLOSED POSITIONS FOR THE VALVE, A COUNTERBALANCE MEMBER SECURED TO THE CLOSURE MEMBER ON THE FACE THEREOF ASSOCIATED WITH THE INLET PORT DURING THE CLOSED POSITION OF THE VALVE, SAID COUNTERBALANCE MEMBER COMPRISING AN ANGULARLY DISPOSED ARM MEMBER HAVING A COUNTERBALANCE VANE MEMBER SECURED ADJACENT THE OUTER EXTREMITY THEREOF, SAID COUNTERBALANCE VANE MEMBER BEING SO ARRANGED WITH RESPECT TO THE CLOSURE MEMBER AS TO REDUCE THE EFFECTIVE WEIGHT OF THE CLOSURE MEMBER WHEREBY FLUID PRESSURE REQUIRED FOR OPENING THEREOF IS REDUCED DURING OPERATION OF THE VALVE.
Claim 2
Dependent Claim
132 words
A CHECK VALVE COMPRISING A BODY HAVING OPPOSED INLET AND OUTLET PORTS, A VALVE SEAT PROVIDED IN THE PROXIMITY OF SAID INLET PORT, A CLOSURE MEMBER PIVOTALLY SECURED IN THE BODY IN THE PROXIMITY OF THE VALVE SEAT FOR COOPERATION THEREWITH TO PROVIDE ALTERNATE OPENED AND CLOSED POSITIONS FOR THE VALVE, A COUNTERBALANCE MEMBER SECURED TO THE CLOSURE MEMBER ON THE FACE THEREOF ASSOCIATED WITH THE INLET PORT DURING THE CLOSED POSITION OF THE VALVE, SAID COUNTERBALANCE MEMBER COMPRISING AN ANGULARLY DISPOSED ARM MEMBER HAVING A COUNTERBALANCE VANE MEMBER SECURED ADJACENT THE OUTER EXTREMITY THEREOF, SAID COUNTERBALANCE VANE MEMBER BEING SO ARRANGED WITH RESPECT TO THE CLOSURE MEMBER AS TO REDUCE THE EFFECTIVE WEIGHT OF THE CLOSURE MEMBER WHEREBY FLUID PRESSURE REQUIRED FOR OPENING THEREOF IS REDUCED DURING OPERATION OF THE VALVE.
References Cited (Backward Citations)
US2546219A
Cited
US2557210A
Cited
US651964A
Cited
US1572687A
Cited
DE545879C
Cited
US2048088A
Cited
US2737879A
Cited
US2864401A
Cited
US3075547A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1967-08-11 | 1968-02-10 | 1968-08-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-08-11 | 1972-02-10 | 1972-08-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-08-11 | 1976-02-10 | 1976-08-11 | $7700.00 | Window Closed / Lapsed |