US3165050A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Universal fire damper with engaging means
Assignee: —
•
Filing: —
•
Granted: 1965-01-12
•
Expires: 1982-01-12
Abstract
No abstract record available.
Inventors
No inventors recorded.
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 20:43
CPC Classifications
F; F16; F16K; F16K17/00; F16K17/36; F16K17/38; F16K17/383; A; A62; A62C; A62C2/00; A62C2/06; A62C2/12; A62C2/14; A62C2/24; A62C2/241; F24; F24F; F24F11/00; F24F11/30; F24F11/32; F24F11/33; F24F11/35; Y; Y10; Y10T; Y10T137/00; Y10T137/1624; Y10T137/1797; Y10T137/1819
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
144 words
IN A FIRE DAMPER COMPRISING AN END FRAME MEMBER, TWO SIDE FRAME MEMBERS, A DAMPER BLADE, NON-CIRCULAR AXLES EXTENDING BEYOND THE EDGES OF SAID BLADE, SAID SIDE FRAME MEMBERS HAVING AXLE-RECEIVING OPENINGS AND AXLERECEIVING NOTCHES ASSOCIATED WITH SAID OPENINGS ON THE SIDES THEREOF OPPOSITE THE END FRAME MEMBER, AND FUSIBLE LINK MEANS ADAPTED TO HOLD SAID BLADE IN AN OPEN POSITION EXCEPT WHEN HEAT OF A PREDETERMINED MAGNITUDE EXISTS IN A DUCT ASSOCIATED WITH SAID DAMPER, THE IMPROVEMENT COMPRISING ENGAGING MEANS ASSOCIATED WITH ONE OF SAID DAMPER BLADE AND SAID END FRAME MEMBER TO CONTACT THE OTHER OF SAID END FRAME MEMBER AND SAID DAMPER BLADE WHEN SAID DAMPER BLADE MOVES TO ITS CLOSED POSITION, TO MOVE SAID DAMPER BLADE AWAY FROM SAID END FRAME MEMBER AND TO PUSH SAID AXLES INTO SAID NOTCHES REGARDLESS TO THE ANGLE OF INSTALLATION OF SAID FRAME MEMBERS.
Claim 2
Dependent Claim
144 words
IN A FIRE DAMPER COMPRISING AN END FRAME MEMBER, TWO SIDE FRAME MEMBERS, A DAMPER BLADE, NON-CIRCULAR AXLES EXTENDING BEYOND THE EDGES OF SAID BLADE, SAID SIDE FRAME MEMBERS HAVING AXLE-RECEIVING OPENINGS AND AXLERECEIVING NOTCHES ASSOCIATED WITH SAID OPENINGS ON THE SIDES THEREOF OPPOSITE THE END FRAME MEMBER, AND FUSIBLE LINK MEANS ADAPTED TO HOLD SAID BLADE IN AN OPEN POSITION EXCEPT WHEN HEAT OF A PREDETERMINED MAGNITUDE EXISTS IN A DUCT ASSOCIATED WITH SAID DAMPER, THE IMPROVEMENT COMPRISING ENGAGING MEANS ASSOCIATED WITH ONE OF SAID DAMPER BLADE AND SAID END FRAME MEMBER TO CONTACT THE OTHER OF SAID END FRAME MEMBER AND SAID DAMPER BLADE WHEN SAID DAMPER BLADE MOVES TO ITS CLOSED POSITION, TO MOVE SAID DAMPER BLADE AWAY FROM SAID END FRAME MEMBER AND TO PUSH SAID AXLES INTO SAID NOTCHES REGARDLESS TO THE ANGLE OF INSTALLATION OF SAID FRAME MEMBERS.
References Cited (Backward Citations)
US2270073A
Cited
US2287262A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1968-01-12 | 1968-07-13 | 1969-01-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-01-12 | 1972-07-13 | 1973-01-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-01-12 | 1976-07-13 | 1977-01-12 | $7700.00 | Window Closed / Lapsed |