Operator for flapper valves
Abstract
Abstract 1,260,917. Valves. COOK MACHINERY CO. Inc. 19 Feb., 1969 [4 March, 1968], No. 9081/69. Heading F2V. A flap valve 15 is operated by a motor having a shaft 22 which rotates a crank disc 24 connected to a rod 18 and arm 17 fast with the valve, the disc 24 having cam surfaces 24a, 24b which actuate a switch 31 to stop rotation of the shaft 22 after a predetermined angle, the motor being operated again after a predetermined time by a timer operated switch 30, until the cam again de-actuates the motor when the valve 15 has been returned to its original position. The rod 18 includes a resilient portion 45, 46, 47 to permit the disc 24 to be rotated through one revolution if the valve 15 is prevented from closing by debris.
Inventors
- 👤 Frank E Willard
Bibliographic Details
Claims Analysis
Total Claims: 0References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1973-07-13 | 1974-01-12 | 1974-07-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-07-13 | 1978-01-12 | 1978-07-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-07-13 | 1982-01-12 | 1982-07-14 | $7700.00 | Window Closed / Lapsed |