US3312159A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Combination fire and volume damper
Assignee: Individual
•
Filing: 1965-04-14
•
Granted: 1967-04-04
•
Expires: 1985-04-14
Abstract
No abstract record available.
Inventors
- 👤 Shepherd Wyley
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 13:28
CPC Classifications
A; A62; A62C; A62C2/00; A62C2/06; A62C2/12; A62C2/14; A62C2/16; F; F24; F24F; F24F13/00; F24F13/08; F24F13/10; F24F13/14; F24F13/15; F24F11/00; F24F11/30; F24F11/32; F24F11/33; F24F11/35; Y; Y10; Y10T; Y10T137/00; Y10T137/1624; Y10T137/1797
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
147 words
A FIRE DAMPER COMPRISING A FRAME HAVING UPRIGHT SIDES AND A HORIZONTAL TOP AND BOTTOM, FIRST, SECOND, THIRD AND FOURTH BLADES JOURNALED AT THEIR ENDS ON TRUNNIONS EXTENDING THROUGH AT LEAST ONE OF SAID SIDES OF THE FRAME FOR ROTATION ABOUT HORIZONTAL AXES BETWEEN OPEN AND CLOSED POSITIONS, FIRST, SECOND, THIRD AND FOURTH LEVERS IN UNITARY ASSEMBLY WITH SAID TRUNNIONS OF SAID RESPECTIVE BLADES ON ONE OUTER SIDE OF SAID FRAME, A PUSH LINK INTERCONNECTING SAID FIRST AND THIRD LEVERS REMOTE FROM THEIR TRUNNIONS, A PULL LINK INTERCONNECTING SAID SECOND AND THIRD LEVERS REMOTE FROM THEIR TRUNNIONS, A PULL LINK INTERCONNECTING SAID SECOND AND FOURTH LEVERS REMOTE FROM THEIR TRUNNIONS, MEANS CONTINUOUSLY RESILIENTLY ACTING ON SAID LINKS AND LEVERS IN A DIRECTION TO PLACE SAID PULL LINKS IN TENSION AND SAID PUSH LINK IN COMPRESSION, AND FUSIBLE LINK MEANS PLACED IN TENSION BY SAID RESILIENTLY ACTING MEANS.
Claim 2
Dependent Claim
147 words
A FIRE DAMPER COMPRISING A FRAME HAVING UPRIGHT SIDES AND A HORIZONTAL TOP AND BOTTOM, FIRST, SECOND, THIRD AND FOURTH BLADES JOURNALED AT THEIR ENDS ON TRUNNIONS EXTENDING THROUGH AT LEAST ONE OF SAID SIDES OF THE FRAME FOR ROTATION ABOUT HORIZONTAL AXES BETWEEN OPEN AND CLOSED POSITIONS, FIRST, SECOND, THIRD AND FOURTH LEVERS IN UNITARY ASSEMBLY WITH SAID TRUNNIONS OF SAID RESPECTIVE BLADES ON ONE OUTER SIDE OF SAID FRAME, A PUSH LINK INTERCONNECTING SAID FIRST AND THIRD LEVERS REMOTE FROM THEIR TRUNNIONS, A PULL LINK INTERCONNECTING SAID SECOND AND THIRD LEVERS REMOTE FROM THEIR TRUNNIONS, A PULL LINK INTERCONNECTING SAID SECOND AND FOURTH LEVERS REMOTE FROM THEIR TRUNNIONS, MEANS CONTINUOUSLY RESILIENTLY ACTING ON SAID LINKS AND LEVERS IN A DIRECTION TO PLACE SAID PULL LINKS IN TENSION AND SAID PUSH LINK IN COMPRESSION, AND FUSIBLE LINK MEANS PLACED IN TENSION BY SAID RESILIENTLY ACTING MEANS.
References Cited (Backward Citations)
US2287262A
Cited
US2474760A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1970-04-03 | 1970-10-03 | 1971-04-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-04-03 | 1974-10-03 | 1975-04-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-04-03 | 1978-10-03 | 1979-04-04 | $7700.00 | Window Closed / Lapsed |