US3306455A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Plate self-shifter for filter presses
Assignee: T Shriver and Co Inc
•
Filing: 1966-06-06
•
Granted: 1967-02-28
•
Expires: 1986-06-06
Abstract
No abstract record available.
Inventors
- 👤 William L Fismer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 16:04
CPC Classifications
B; B01; B01D; B01D25/00; B01D25/12; B01D25/172
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
118 words
IN A FILTER PRESS HAVING AN ELONGATED FRAME, A FILTER PRESS HEAD FIXED TO ONE END OF SAID FRAME, A FOLLOWER MOVABLY MOUNTED ON SAID FRAME AND A PLURALITY OF FILTER PRESS PLATES SUPPORTED BY SAID FRAME BETWEEN SAID HEAD AND SAID FOLLOWER AND MOVABLE ALONG SAID FRAME; THE COMBINATION THEREWITH OF A CARRIAGE MOVABLE LENGTHWISE OF SAID FRAME, MEANS FOR RECIPROCATING SAID CARRIAGE LENGTHWISE OF SAID FRAME, A PAIR OF PAWLS MOUNTED ON SAID CARRIAGE AND MOVABLE INTO RAISED AND LOWERED POSITIONS, MEANS FOR RESILIENTLY BIASING SAID PAWLS TO RAISED POSITION, CAM MEANS MOUNTED ON SAID CARRIAGE FOR MOVEMENT BETWEEN TWO POSITIONS FOR SELECTIVELY MOVING ONE OF SAID PAWLS INTO SAID LOWERED POSITION AND ENABLING THE OTHER
Claim 2
Dependent Claim
118 words
IN A FILTER PRESS HAVING AN ELONGATED FRAME, A FILTER PRESS HEAD FIXED TO ONE END OF SAID FRAME, A FOLLOWER MOVABLY MOUNTED ON SAID FRAME AND A PLURALITY OF FILTER PRESS PLATES SUPPORTED BY SAID FRAME BETWEEN SAID HEAD AND SAID FOLLOWER AND MOVABLE ALONG SAID FRAME; THE COMBINATION THEREWITH OF A CARRIAGE MOVABLE LENGTHWISE OF SAID FRAME, MEANS FOR RECIPROCATING SAID CARRIAGE LENGTHWISE OF SAID FRAME, A PAIR OF PAWLS MOUNTED ON SAID CARRIAGE AND MOVABLE INTO RAISED AND LOWERED POSITIONS, MEANS FOR RESILIENTLY BIASING SAID PAWLS TO RAISED POSITION, CAM MEANS MOUNTED ON SAID CARRIAGE FOR MOVEMENT BETWEEN TWO POSITIONS FOR SELECTIVELY MOVING ONE OF SAID PAWLS INTO SAID LOWERED POSITION AND ENABLING THE OTHER
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) | 1970-02-27 | 1970-08-29 | 1971-02-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-02-27 | 1974-08-29 | 1975-02-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-02-27 | 1978-08-29 | 1979-02-28 | $7700.00 | Window Closed / Lapsed |