US3551921A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Mechanical control for liquid drain stopper
Assignee: Stanadyne LLC
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Filing: 1968-06-28
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Granted: 1971-01-05
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Expires: 1988-06-28
Abstract
Abstract A MECHANICAL CONTROL FOR A LIQUID DRAIN STOPPER INCLUDES A MOUNTING PLATE HAVING A HOLE IN IT AND CAM MEANS FORMED ON THE REAR FACE OF THE PLATE ADJACENT THE HOLE. A LEVER EXTENDS THROUGH THE HOLE AND A U-SHAPED SPRING BIASES AGAINST AN ABUTMENT ON THE REAR OF THE LEVER AND AGAINST THE CAM MEANS. PIVOTING THE FRONT PORTION OF THE LEVER MOVES THE SPRING FROM ONE PORTION OF THE CAM TO ANOTHER FOR POSITIONING A DRAIN STOPPER IN EITHER AN OPENED OR A CLOSED POSITION.
Inventors
- 👤 William R Fox
- 👤 Edgar R Rowe
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 12:10
CPC Classifications
E; E03; E03C; E03C1/00; E03C1/12; E03C1/22; E03C1/23; E03C2001/2317; Y; Y10; Y10T; Y10T74/00; Y10T74/18; Y10T74/18856; Y10T74/18864; Y10T74/18872; Y10T74/18888; Y10T74/18896; Y10T74/18904
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-01-04 | 1974-07-06 | 1975-01-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-01-04 | 1978-07-06 | 1979-01-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-01-04 | 1982-07-06 | 1983-01-05 | $7700.00 | Window Closed / Lapsed |