Patent FR979790A successfully refreshed from Google Patents.
Patent US3561345A successfully refreshed from Google Patents.
US3561345A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Damper arrangement
Assignee: American Air Filter Co Inc
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Filing: 1969-03-04
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Granted: 1971-02-09
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Expires: 1989-03-04
Abstract
Abstract A damper arrangement including a fluid flow control damper connected to a damper operator by resilient connecting means so the damper is moved in response to movement of the operator and is moved independently of the operator by forces exerted directly upon the damper.
Inventors
- 👤 John L Kline
- 👤 Curtis W Utz
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 02:44
CPC Classifications
F; F24; F24F; F24F13/00; F24F13/08; F24F13/10; F24F13/14; F24F13/1413; F24F1/00; F24F1/0007; F24F1/0035; F24F1/0071; F24F1/0073; F24F11/00; F24F11/70; F24F11/72; F24F11/74; F24F13/1426; F24F2013/1473
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
85 words
A damper arrangement disposed in a fluid flow conduit for controlling flow of fluid through said conduit comprising: fluid flow damper means; pivotable damper operator means actuated by change in selected condition; yieldable means having a preselected yield point connecting said damper operator means and said damper means so said damper is moved in response to movement of said operator means and is moved independently of said damper operator means by force beyond the yield point of said yieldable means selectively exerted on said damper.
Claim 2
Dependent Claim
85 words
A damper arrangement disposed in a fluid flow conduit for controlling flow of fluid through said conduit comprising: fluid flow damper means; pivotable damper operator means actuated by change in selected condition; yieldable means having a preselected yield point connecting said damper operator means and said damper means so said damper is moved in response to movement of said operator means and is moved independently of said damper operator means by force beyond the yield point of said yieldable means selectively exerted on said damper.
Claim 3
Dependent Claim
60 words
The damper arrangement of claim 1 wherein said damper is connected to rotatable damper shaft along an axis of said damper where said axis is displaced from the geometric center axis of said damper so a force exerted uniformly over an area of said damper transverse to said damper shaft will result in a turning moment about said damper shaft.
Claim 4
Dependent Claim
37 words
The damper arrangement of claim 2 wherein said damper operator means includes sleeve means disposed in a freely rotatable relation on said damper shaft means and spring means connecting said damper operator means with said damper means.
Claim 5
Dependent Claim
32 words
The apparatus of claim 3 wherein said damper operator means includes arm means extending radially outwardly from said sleeve means and spring means connected from said arm means to said damper means.
Claim 6
Dependent Claim
24 words
The apparatus of claim 3 wherein said spring means include coil spring means connected to said damper operator means and to said damper means.
Claim 7
Dependent Claim
156 words
A damper control arrangement disposed in a fluid flow conduit for controlling the flow of a stream of air comprising: a first inlet, a second inlet, and an outlet in said conduit, said first inlet positioned adjacent outside air whereby flow of air through said first inlet is controlled by a first damper means; pivotable damper operator means actuated by change in selected condition; spring means connecting said damper operator means and said damper means so said damper is moved in response to movement of said operator means and is moved independently of said damper operator means by force selectively exerted on said damper; second damper means pivotably mounted in spaced relation from said first damper means and controls the flow of air through said second inlet; and connecting rod means connecting said first damper means with said damper means so said second damper means is moved in response to movement of said first damper means.
Claim 8
Dependent Claim
156 words
A damper control arrangement disposed in a fluid flow conduit for controlling the flow of a stream of air comprising: a first inlet, a second inlet, and an outlet in said conduit, said first inlet positioned adjacent outside air whereby flow of air through said first inlet is controlled by a first damper means; pivotable damper operator means actuated by change in selected condition; spring means connecting said damper operator means and said damper means so said damper is moved in response to movement of said operator means and is moved independently of said damper operator means by force selectively exerted on said damper; second damper means pivotably mounted in spaced relation from said first damper means and controls the flow of air through said second inlet; and connecting rod means connecting said first damper means with said damper means so said second damper means is moved in response to movement of said first damper means.
Claim 9
Dependent Claim
17 words
The apparatus of claim 6 wherein said connecting rod means is connected directly to said first damper.
Claim 10
Dependent Claim
52 words
The apparatus of claim 6 wherein said connecting rod means is connected to said damper operator means so said second damper is moved in response to movement of said damper operator means and said first damper can be moved independently of said second damper by force selectively exerted on said first damper.
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) | 1974-02-08 | 1974-08-10 | 1975-02-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-02-08 | 1978-08-10 | 1979-02-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-02-08 | 1982-08-10 | 1983-02-09 | $7700.00 | Window Closed / Lapsed |