Patent US3323439A successfully refreshed from Google Patents.
US3323439A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Damper and fire control device for ventilators
Assignee: WEAVER
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Filing: 1966-01-28
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Granted: 1967-06-06
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Expires: 1986-01-28
Abstract
No abstract record available.
Inventors
- 👤 Bruce D Weaver
- 👤 Jerrell E Redmon
- 👤 Jr Burllynn Conner
- 👤 John D Wright
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 19:47
CPC Classifications
A; A62; A62C; A62C3/00; A62C3/04; F; F24; F24C; F24C15/00; F24C15/20; F24C15/2021
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
142 words
IN A VENTILATOR FOR COOKING DEVICES WHICH INCLUDES A PIVOTAL DAMPER DOOR BIASED IN A NORMALLY CLOSED POSITION AND A CABLE WHICH WHEN PULLED OPENS THE DOOR, THE IMPROVEMENT INCLUDING: A ROTATABLE AND AXIALLY MOVABLE SHAFT, THE CABLE ATTACHED TO THE SHAFT AND DOOR AND ARRANGED TO BE PULLED UPON ROTATION OF THE SHAFT, A FUSIBLE LINK INCORPORATED IN THE CABLE, AN OPERATING KNOB EXTENDING FROM A FIRST END OF THE SHAFT, A FIRST DISK MOUNTED ON THE VENTILATOR WITH THE SECOND END OF THE SHAFT JOURNALED THEREIN, A SECOND DISK MOUNTED ON THE SHAFT ADJACENT THE FIRST DISK, A SERIES OF LOCATING HOLES IN THE FIRST DISK RADIALLY SPACED FROM THE SHAFT, A LOCATING PIN EXTENDING FROM THE SECOND DISK INSERTABLE IN EACH HOLE UPON AXIAL AND ROTATIONAL MOVEMENT OF THE DISK AND SHAFT, AND MEANS YIELDINGLY URGING THE DISKS TOGETHER.
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) | 1970-06-05 | 1970-12-05 | 1971-06-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-06-05 | 1974-12-05 | 1975-06-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-06-05 | 1978-12-05 | 1979-06-06 | $7700.00 | Window Closed / Lapsed |