US3783768A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Damper assembly
Assignee: IMP DAMPER CO Inc
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Filing: 1971-10-14
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Granted: 1974-01-08
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Expires: 1991-10-14
Abstract
Abstract A damper assembly is provided in a rectangular frame with streamlined blades rotatable on parallel shafts. The shafts may be square in section and ride in square orifices extending through hubs of the extruded blades. Air, smoke or other gaseous leakage is immeasurably reduced between the ends of the blades and the frame by a unique composite seal disposed between the end of the blades and the damper frame.
Inventors
- 👤 L Caming
- 👤 F Fromwiller
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 23:27
CPC Classifications
F; F24; F24F; F24F13/00; F24F13/08; F24F13/10; F24F13/14; F24F13/1406; F24F13/15
Claims Analysis
Total Claims: 14
Claim 1
Independent Claim
263 words
A damper assembly for the control of the flow of fluids through a rectangular aperture, comprising; a frame with a first pair of sides joined, in parallel spaced relationship, to a second pair of sides, similarly spaced; pivot means, including at lease one shaft, bearing means, for pivotally locating said shaft in said frame parallel to said second pair of sides, with a portion of said shaft protruding beyond at least one of said first pair of sides; linkage means engaging said shaft on said portion protruding beyond said first pair of sides; louver means, including vanes or blades having hubs containing orifice means defining a square orifice in a vane for keying said vane to said shaft and said vane extending substantially between said first pair of sides; side-seal means having a thin, outer flexible member and an inner resilient member of an elasto-meric material secured to the inner surface of said outer flexible member; said side seals being pierced for passage of said shafts therethrough; said hub of said blade forming substantially a one-half portion of said vane and the other portion of said vane is secured to said one-half portion adjacent said hub by locking means which interlock said portions together in a substantially immovable position; and drive means connected to said linkage means for rotating said vane on said shaft into the plane of said frame, thereby resulting in cessation of flow of fluids through said aperture; and alternately for rotating said vane from the plane of said frame and thereby, permitting the flow of fluids through said aperture.
Claim 2
Dependent Claim
263 words
A damper assembly for the control of the flow of fluids through a rectangular aperture, comprising; a frame with a first pair of sides joined, in parallel spaced relationship, to a second pair of sides, similarly spaced; pivot means, including at lease one shaft, bearing means, for pivotally locating said shaft in said frame parallel to said second pair of sides, with a portion of said shaft protruding beyond at least one of said first pair of sides; linkage means engaging said shaft on said portion protruding beyond said first pair of sides; louver means, including vanes or blades having hubs containing orifice means defining a square orifice in a vane for keying said vane to said shaft and said vane extending substantially between said first pair of sides; side-seal means having a thin, outer flexible member and an inner resilient member of an elasto-meric material secured to the inner surface of said outer flexible member; said side seals being pierced for passage of said shafts therethrough; said hub of said blade forming substantially a one-half portion of said vane and the other portion of said vane is secured to said one-half portion adjacent said hub by locking means which interlock said portions together in a substantially immovable position; and drive means connected to said linkage means for rotating said vane on said shaft into the plane of said frame, thereby resulting in cessation of flow of fluids through said aperture; and alternately for rotating said vane from the plane of said frame and thereby, permitting the flow of fluids through said aperture.
Claim 3
Dependent Claim
23 words
The damper assembly according to claim 1, wherein said vanes are defined by convex arcuate surfaces symmetrical about chords thereof encompassing said hubs.
Claim 4
Dependent Claim
26 words
The damper assembly according to claim 1, wherein said inner resilient member is of an elastomeric material and said outer member is of flexible metallic material.
Claim 5
Dependent Claim
28 words
The damper assembly according to claim 1, wherein said outer member is of a thin flexible plastic material and said inner resilient member is of an elastomeric material.
Claim 6
Dependent Claim
63 words
The damper assembly according to claim 1, wherein said linkage means include lever-arms with a central body portion having an orifice to slideably engage said shaft and provided with at least one pair of extensions spaced along axes of said shaft and rigidly affixed to said central portion, each of said pairs of extensions lying in a plane including axis of said orifice.
Claim 7
Dependent Claim
42 words
The damper assembly according to claim 1, wherein a plurality of shafts are employed and all of said shafts are square in section, and said louver means are keyed to said shafts by square orifices piErcing hubs in midsection of said vanes.
Claim 8
Dependent Claim
52 words
The damper assembly according to claim 1, wherein said locking means comprises mating resilient extensions extending outwardly from said one-half portion adjacent said hub and from said other portion of said vane and said extensions having cooperative shoulders which grip each other and thereby interlock said portion as a unitary one-piece assembly.
Claim 9
Dependent Claim
36 words
The damper assembly according to claim 1, including blade edge sealing means between abutting surfaces of said blades for insuring a seal between leading edges of adjacent blades when said damper is in a closed position.
Claim 10
Dependent Claim
35 words
The damper assembly according to claim 8, wherein said blade edge sealing means comprise elongated elastomeric bodies substantially rectangular in section, one edge thereof being keyed to inner surfaces of said second pair of sides.
Claim 11
Dependent Claim
36 words
The damper assembly according to claim 1, wherein said hub forms a central element and said vane is secured to said central element by locking means which interlock said elements together in a substantially immovable position.
Claim 12
Dependent Claim
43 words
The damper assembly according to claim 10, wherein said locking means comprises mating resilient extensions, extending outwardly from said hub and said vanes and said extensions having cooperative shoulders which grip each other and thereby interlock said elements as a unitary one-piece vane.
Claim 13
Dependent Claim
45 words
The damper assembly according to claim 1, wherein said first and second pair of sides of said frame are provided with means for cooperating with associated means provided on connectors which serve to stack a plurality of damper assemblies adjacent any side of said frame.
Claim 14
Dependent Claim
18 words
The damper assembly according to claim 12, wherein said means comprises mating dove-tail grooves and cooperative dovetail keys.
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) | 1977-01-07 | 1977-07-09 | 1978-01-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-01-07 | 1981-07-09 | 1982-01-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-01-07 | 1985-07-09 | 1986-01-08 | $7700.00 | Window Closed / Lapsed |