US3295546A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Gate valve for scale concentrated fluid
Assignee: Individual
•
Filing: 1963-06-19
•
Granted: 1967-01-03
•
Expires: 1983-06-19
Abstract
No abstract record available.
Inventors
- 👤 Sydney E Carlton
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 20:43
CPC Classifications
F; F16; F16K; F16K3/00; F16K3/02; F16K3/0227; F16K27/00; F16K27/10; F16K27/105; Y; Y10; Y10T; Y10T137/00; Y10T137/4238; Y10T137/4245; Y10T137/4273
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
133 words
A KNIFE GATE FOR A GATE VALVE COMPRISING A GATE MEMBER HAVING A THROUGH PORT ADJACENT THE BOTTOM THEREOF ADAPTED TO REGISTER WITH A PIPE OPENING OF A VALVE IN THE OPEN POSITION, AND A SOLID PORTION ABOVE THE PORT ADAPTED TO CLOSE OFF THE PIPE OPENING IN THE CLOSED POSITION, A GROOVE SEMI-CIRCULAR AT BOTH TOP AND BOTTOM WITH PARALLEL SIDES ADJACENT THE MARGINAL EDGE OF SAID GATE MEMBER ENCIRCLING BOTH THE THROUGH PORT AND THE CLOSING AREA, A RING RETAINED WITHIN SAID GROOVE, SAID RING BEING ANGULARLY DISPOSED WITH RESPECT TO THE PLANE OF THE GATE MEMBER OUTWARDLY AND INWARDLY AND ADAPTED FOR RESILIENT SLIDING ENGAGEMENT WITH THE FACE OF THE VALVE CHAMBER AND MEANS AT THE TOP THEREOF FOR RECEIVING AND LOOSELY RETAINING THE SHAPED END OF A VALVE STEM.
Claim 2
Dependent Claim
133 words
A KNIFE GATE FOR A GATE VALVE COMPRISING A GATE MEMBER HAVING A THROUGH PORT ADJACENT THE BOTTOM THEREOF ADAPTED TO REGISTER WITH A PIPE OPENING OF A VALVE IN THE OPEN POSITION, AND A SOLID PORTION ABOVE THE PORT ADAPTED TO CLOSE OFF THE PIPE OPENING IN THE CLOSED POSITION, A GROOVE SEMI-CIRCULAR AT BOTH TOP AND BOTTOM WITH PARALLEL SIDES ADJACENT THE MARGINAL EDGE OF SAID GATE MEMBER ENCIRCLING BOTH THE THROUGH PORT AND THE CLOSING AREA, A RING RETAINED WITHIN SAID GROOVE, SAID RING BEING ANGULARLY DISPOSED WITH RESPECT TO THE PLANE OF THE GATE MEMBER OUTWARDLY AND INWARDLY AND ADAPTED FOR RESILIENT SLIDING ENGAGEMENT WITH THE FACE OF THE VALVE CHAMBER AND MEANS AT THE TOP THEREOF FOR RECEIVING AND LOOSELY RETAINING THE SHAPED END OF A VALVE STEM.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1970-01-02 | 1970-07-04 | 1971-01-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-01-02 | 1974-07-04 | 1975-01-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-01-02 | 1978-07-04 | 1979-01-03 | $7700.00 | Window Closed / Lapsed |