US3581650A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Combination air damper
Assignee: Individual
•
Filing: 1969-05-08
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Granted: 1971-06-01
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Expires: 1989-05-08
Abstract
Abstract An air damper ventilator combines a fixed blade ventilator with means adaptable to check the flow of air in a plurality of directions or regulate the flow of air as it passes therethrough.
Inventors
- 👤 Francis J Mccabe
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 10:04
CPC Classifications
F; F24; F24F; F24F13/00; F24F13/08; F24F13/10; F24F13/14; F24F13/15; F24F11/00; F24F11/70; F24F11/72; F24F11/74; F24F11/745; F24F13/082; Y; Y10; Y10T; Y10T137/00; Y10T137/7722; Y10T137/7837; Y10T137/7838; Y10T137/7839; Y10T137/7898; Y10T137/7903; Y10T137/8593; Y10T137/87265; Y10T137/8741; Y10T137/87442; Y10T137/87467; Y10T137/87475
Claims Analysis
Total Claims: 13
Claim 1
Independent Claim
130 words
An air damper comprising: a. a frame having side members with inwardly disposed flanges thereon including a central flange having at least two legs, one of which extends inwardly a greater distance than the other; b. a plurality of fixed blades extending between said side members and interlocked between the front flanges and the central flange; c. continuous hinge elements connected to said fixed blades, each of said hinge elements comprising at least two hook-shaped parts disposed on opposite sides of a web member; and d. at least one movable blade having a continuous hook-shaped hinge portion interconnected with one of said hook-shaped parts for pivotal movement with respect thereto, said blade having a seal means thereon for sealingly engaging another of said hookshaped parts on an adjacent hinge element.
Claim 2
Dependent Claim
130 words
An air damper comprising: a. a frame having side members with inwardly disposed flanges thereon including a central flange having at least two legs, one of which extends inwardly a greater distance than the other; b. a plurality of fixed blades extending between said side members and interlocked between the front flanges and the central flange; c. continuous hinge elements connected to said fixed blades, each of said hinge elements comprising at least two hook-shaped parts disposed on opposite sides of a web member; and d. at least one movable blade having a continuous hook-shaped hinge portion interconnected with one of said hook-shaped parts for pivotal movement with respect thereto, said blade having a seal means thereon for sealingly engaging another of said hookshaped parts on an adjacent hinge element.
Claim 3
Dependent Claim
27 words
The invention of claim 1 wherein a part of the movable blade overlies part of that leg of the central flange which extends inwardly the greatest distance.
Claim 4
Dependent Claim
29 words
The invention of claim 1 wherein the seal means comprises a longitudinally extending jawlike portion on the blade engaging the hinge element along at least two lines of contact.
Claim 5
Dependent Claim
14 words
The invention of claim 1 wherein the hinge element interlocks with the central flange.
Claim 6
Dependent Claim
34 words
The invention of claim 1 wherein the pivotal connection between the hook-shaped hinge portion of the blade and hinge element is offset from the blade and located within the envelope of the central flanges.
Claim 7
Dependent Claim
21 words
The invention of claim 1 wherein the hook-shaped hinge portion of the blade has an extension overlying the mating hinge element.
Claim 8
Dependent Claim
45 words
The invention of claim 1 wherein the movable blade is connected to the hinge part to swing toward the fixed blade, which is connected to the same hinge element, to open said damper, said blades being positioned on the same side of the central flanges.
Claim 9
Dependent Claim
45 words
The invention of claim 1 wherein the movable blade is connected to the hinge part to swing away from the fixed blade, which is connected to the same hinge element, to open said damper, said blades being positioned on opposite sides of the central flanges.
Claim 10
Dependent Claim
22 words
ThE invention of claim 8 wherein said movable blade is positioned at an angle of more than 90* to said fixed blade.
Claim 11
Dependent Claim
19 words
The invention of claim 8 wherein means are connected to the movable blades for positioning them in predetermined positions.
Claim 12
Dependent Claim
112 words
An air damper comprising: a. a frame having side members with inwardly disposed flanges thereon including a central flange having at least two legs; b. a plurality of fixed blades extending between said side members and interlocked between the front flanges and the central flange; c. continuous hinge elements connected to said fixed blades, each of said hinge elements comprising at least two hook-shaped parts disposed on opposite sides of a web member; and d. at least one moveable blade having a continuous hook-shaped hinge portion interconnected with one of said hook-shaped parts for pivotal movement with respect thereto, said blade engaging another of said hook-shaped parts on an adjacent hinge element.
Claim 13
Dependent Claim
112 words
An air damper comprising: a. a frame having side members with inwardly disposed flanges thereon including a central flange having at least two legs; b. a plurality of fixed blades extending between said side members and interlocked between the front flanges and the central flange; c. continuous hinge elements connected to said fixed blades, each of said hinge elements comprising at least two hook-shaped parts disposed on opposite sides of a web member; and d. at least one moveable blade having a continuous hook-shaped hinge portion interconnected with one of said hook-shaped parts for pivotal movement with respect thereto, said blade engaging another of said hook-shaped parts on an adjacent hinge element.
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) | 1974-05-31 | 1974-11-30 | 1975-06-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-05-31 | 1978-11-30 | 1979-06-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-05-31 | 1982-11-30 | 1983-06-01 | $7700.00 | Window Closed / Lapsed |