US3847210A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Damper sequencer
Assignee: Individual
•
Filing: 1972-09-14
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Granted: 1974-11-12
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Expires: 1992-09-14
Abstract
Abstract A fluid-flow apparatus having a damper frame provided with walls forming separate side-by-side flow paths for hot, cold and bypass air. Damper elements are pivotally mounted on shafts and arranged in the flow paths for blocking and unblocking same. Each shaft has a pinion gear mounted thereon for pivotal movement with the shaft and associated damper element. Rack gear segments are provided on a longitudinally slidably mounted carrier bar for engaging the pinion gears in a predetermined sequence which places in a blocked position one of the hot and cold air flow paths whenever the other flow path of that pair is simultaneously in an unblocked position. The bypass air flow path is unblocked when either the hot or cold air flow path is only partially unblocked. Spring or cam elements cooperate with flats on the damper element shaft for releasably retaining them in preselected positions.
Inventors
- 👤 J Wells
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 19:00
CPC Classifications
F; F24; F24F; F24F3/00; F24F3/044; F24F3/048; F24F13/00; F24F13/08; F24F13/10; F24F13/14; F24F13/1413; F24F13/1426; F24F2013/1446; Y; Y10; Y10S; Y10S165/00; Y10S165/092; Y10S165/101; Y10S165/104; Y10S165/105; Y10T; Y10T137/00; Y10T137/8593; Y10T137/87153; Y10T137/87161; Y10T137/87265; Y10T137/8741; Y10T137/87442; Y10T137/87467; Y10T137/87515; Y10T137/87571; Y10T137/87676; Y10T137/87684; Y10T137/87692
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
234 words
A fluid-flow apparatus, comprising, in combination: a. damper means associated with three fluid-flow paths for moving between a position blocking each flow path and a position unblocking same, two of the paths normally blocked and one of the paths normally unblocked, the damper means including a frame provided with wall portions forming the flow paths, damper elements arranged in the flow paths, and shafts pivotally mounted to the frame, said damper elements mounted on the shafts for pivotal movement therewith, b. means for selectively moving the damper elements in a predetermined sequence retaining in a blocked position one of the two normally blocked flow paths whenever the other flow path of the pair is in unblocked position, the moving means including pinion gears mounted on said shafts for movement therewith, rack gear segments associated with said pinion gears, and a longitudinal carrier bar mounted on said frame for longitudinal movement with respect thereto, said gear segments mounted on said carrier bar for movement therewith, and a pair of the gear segments arranged for always movably engaging the pinion gear associated with the normally unblocked one of the flow paths and sequentially engaging only one of the other, normally blocked flow paths for obtaining a constant flow from the three paths, the damper element of the flow path associated with the disengaged pinion gear being arranged in a position blocking the flow path associated therewith.
Claim 2
Dependent Claim
234 words
A fluid-flow apparatus, comprising, in combination: a. damper means associated with three fluid-flow paths for moving between a position blocking each flow path and a position unblocking same, two of the paths normally blocked and one of the paths normally unblocked, the damper means including a frame provided with wall portions forming the flow paths, damper elements arranged in the flow paths, and shafts pivotally mounted to the frame, said damper elements mounted on the shafts for pivotal movement therewith, b. means for selectively moving the damper elements in a predetermined sequence retaining in a blocked position one of the two normally blocked flow paths whenever the other flow path of the pair is in unblocked position, the moving means including pinion gears mounted on said shafts for movement therewith, rack gear segments associated with said pinion gears, and a longitudinal carrier bar mounted on said frame for longitudinal movement with respect thereto, said gear segments mounted on said carrier bar for movement therewith, and a pair of the gear segments arranged for always movably engaging the pinion gear associated with the normally unblocked one of the flow paths and sequentially engaging only one of the other, normally blocked flow paths for obtaining a constant flow from the three paths, the damper element of the flow path associated with the disengaged pinion gear being arranged in a position blocking the flow path associated therewith.
Claim 3
Dependent Claim
23 words
A structure as defined in claim 1, further including means for releasably retaining said shafts in one of a plurality of predetermined positions.
Claim 4
Dependent Claim
37 words
A structure as define in claim 2, wherein each of said shafts is provided with a plurality of planar surfaces, and the retaining means is springs mounted on said frame and arranged for engaging the planar surfaces.
Claim 5
Dependent Claim
39 words
A structure as defined in claim 2, wherein each of said shafts is provided with a plurality of planar surfaces, and the retaining means is cam portions provided on the gear segments and arranged for engaging the planar surfaces.
Claim 6
Dependent Claim
36 words
A structure as defined in claim 1, wherein the three fluid flow paths are one each for hot, cold, and bypass air, and the two normally blocked flow paths are those for hot and cold air.
Claim 7
Dependent Claim
24 words
A structure as defined in claim 5, further including fluid passage means including a conduit having walls defining the flow paths in side-by-side arrangement.
Claim 8
Dependent Claim
37 words
A structure as defined in claim 6, wherein each of said shafts is provided with a plurality of planar surfaces, and the retaining means is springs mounted on said frame and arranged for engaging the planar surfaces.
Claim 9
Dependent Claim
39 words
A structure as defined in claim 6, wherein each of said shafts is provided with a plurality of planar surfaces, and the retaining means is cam portions provided on the gear segments and arranged for engaging the planar surfaces.
Claim 10
Dependent Claim
24 words
A structure as defined in claim 1, further including fluid passage means including a conduit having walls defining the flow paths in side-by-side arrangement.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1977-11-11 | 1978-05-13 | 1978-11-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-11-11 | 1982-05-13 | 1982-11-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-11-11 | 1986-05-13 | 1986-11-12 | $7700.00 | Window Closed / Lapsed |