Patent US3800846A successfully refreshed from Google Patents.
US3800846A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Fire damper duct adaptor
Assignee: Individual
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Filing: 1972-02-14
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Granted: 1974-04-02
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Expires: 1992-02-14
Abstract
Abstract A fire damper duct adaptor for installing a fire damper in a ventilation or air conditioning duct system which includes a duct connector of dimensions less than the fire damper frame, a peripheral filler piece joining the duct connector to the fire damper frame and a peripheral frame connection overfitting the fire damper frame and peripherally securing the filler piece thereto. The frame connection is bent to provide a peripheral Ushaped trough which overfits the end portions of the fire damper frame in a substantially air tight connection. A semi-liquid duct sealer is applied to fill the U-shaped trough to aid in sealing the junction between the duct adaptor and the fire damper frame to prevent air leakage therethrough.
Inventors
- 👤 J Kurz
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 13:04
CPC Classifications
A; A62; A62C; A62C2/00; A62C2/06; A62C2/12; A62C2/14; A62C2/16
Claims Analysis
Total Claims: 33
Claim 1
Independent Claim
219 words
In a fire damper duct adoptor suitable for installing a fire damper including a peripheral frame within an air handling duct, the combination of A. a duct connector of size and dimensions to outwardly connect to the said duct, 1. said duct connector terminating inwardly in a planar filler piece, 2. said duct connector being connected to the said filler piece in a substantially air tight peripheral junction; B. a frame connection member defining a central opening and overfitting the said duct connector, 1. said frame connector including a peripheral skirt, 2. said skirt being affixed to said filler piece in a substantially air tight peripheral junction, 3. said frame connection member including bent fire damper frame connection means, a. said frame connection means extending about the entire periphery of the frame connection member, b. said frame connection means being bent to form a substantially U-shaped trough, c. the said U-shaped trough peripherally overfitting the outer periphery of the fire damper frame; and C. sealing means interfitting between the U-shaped trough and the outer periphery of the fire damper frame, 1. said sealing means substantially filling the U-shaped trough, 2. said sealing means being semi-liquid in consistency and being composed of fire resistant materials, 3. said sealing means sealing the junction between the duct connector and the filler piece.
Claim 2
Dependent Claim
219 words
In a fire damper duct adoptor suitable for installing a fire damper including a peripheral frame within an air handling duct, the combination of A. a duct connector of size and dimensions to outwardly connect to the said duct, 1. said duct connector terminating inwardly in a planar filler piece, 2. said duct connector being connected to the said filler piece in a substantially air tight peripheral junction; B. a frame connection member defining a central opening and overfitting the said duct connector, 1. said frame connector including a peripheral skirt, 2. said skirt being affixed to said filler piece in a substantially air tight peripheral junction, 3. said frame connection member including bent fire damper frame connection means, a. said frame connection means extending about the entire periphery of the frame connection member, b. said frame connection means being bent to form a substantially U-shaped trough, c. the said U-shaped trough peripherally overfitting the outer periphery of the fire damper frame; and C. sealing means interfitting between the U-shaped trough and the outer periphery of the fire damper frame, 1. said sealing means substantially filling the U-shaped trough, 2. said sealing means being semi-liquid in consistency and being composed of fire resistant materials, 3. said sealing means sealing the junction between the duct connector and the filler piece.
Claim 3
Dependent Claim
9 words
said skirt terminating outwardly in a peripheral, U-shaped trough,
Claim 4
Dependent Claim
9 words
said skirt terminating outwardly in a peripheral, U-shaped trough,
Claim 5
Dependent Claim
8 words
said frame connection member including a peripheral skirt,
Claim 6
Dependent Claim
8 words
said frame connection member including a peripheral skirt,
Claim 7
Dependent Claim
24 words
said filler piece being bent to lie in a plane positioned at right angles to the direction of air stream movement within the duct,
Claim 8
Dependent Claim
24 words
said filler piece being bent to lie in a plane positioned at right angles to the direction of air stream movement within the duct,
Claim 9
Dependent Claim
44 words
said blade assembly being normally retained in a compacted condition wherein the blade assembly is held near the peripheral frame and wherein the blade assembly extends inwardly from the frame; B. a duct adaptor of size and dimensions to outwardly connect to the duct,
Claim 10
Dependent Claim
44 words
said blade assembly being normally retained in a compacted condition wherein the blade assembly is held near the peripheral frame and wherein the blade assembly extends inwardly from the frame; B. a duct adaptor of size and dimensions to outwardly connect to the duct,
Claim 11
Dependent Claim
42 words
In a fire damper duct adaptor suitable for connecting the peripheral frame of a fire damper to an air handling duct in a manner to mount the blade assembly outwardly from the duct air stream, the combination of A. a fire damper,
Claim 12
Dependent Claim
42 words
In a fire damper duct adaptor suitable for connecting the peripheral frame of a fire damper to an air handling duct in a manner to mount the blade assembly outwardly from the duct air stream, the combination of A. a fire damper,
Claim 13
Dependent Claim
14 words
said sealing means being semi-liquid in consistency and being composed of fire resistant materials,
Claim 14
Dependent Claim
14 words
said sealing means being semi-liquid in consistency and being composed of fire resistant materials,
Claim 15
Dependent Claim
15 words
said skirt being affixed to said filler piece in a substantially air tight peripheral junction,
Claim 16
Dependent Claim
15 words
said skirt being affixed to said filler piece in a substantially air tight peripheral junction,
Claim 17
Dependent Claim
32 words
said duct connector being connected to the said filler piece in a substantially air tight peripheral junction; B. a frame connection member defining a central opening and overfitting the said duct connector,
Claim 18
Dependent Claim
32 words
said duct connector being connected to the said filler piece in a substantially air tight peripheral junction; B. a frame connection member defining a central opening and overfitting the said duct connector,
Claim 19
Dependent Claim
72 words
said frame connection member including bent fire damper frame connection means, a. said frame connection means extending about the entire periphery of the frame connection member, b. said frame connection means being bent to form a substantially U-shaped trough, c. the said U-shaped trough peripherally overfitting the outer periphery of the fire damper frame; and C. sealing means interfitting between the U-shaped trough and the outer periphery of the fire damper frame,
Claim 20
Dependent Claim
72 words
said frame connection member including bent fire damper frame connection means, a. said frame connection means extending about the entire periphery of the frame connection member, b. said frame connection means being bent to form a substantially U-shaped trough, c. the said U-shaped trough peripherally overfitting the outer periphery of the fire damper frame; and C. sealing means interfitting between the U-shaped trough and the outer periphery of the fire damper frame,
Claim 21
Dependent Claim
14 words
said sealing means sealing the junction between the duct connector and the filler piece.
Claim 22
Dependent Claim
14 words
said sealing means sealing the junction between the duct connector and the filler piece.
Claim 23
Dependent Claim
50 words
said filler piece extending peripherally outwardly from the duct connector a sufficient distance to equal the distance the blade assembly extends inwardly from the frame to prevent impingement by the air stream upon the blade assembly; C. a frame connection member defining a central opening and overfitting the duct connector,
Claim 24
Dependent Claim
50 words
said filler piece extending peripherally outwardly from the duct connector a sufficient distance to equal the distance the blade assembly extends inwardly from the frame to prevent impingement by the air stream upon the blade assembly; C. a frame connection member defining a central opening and overfitting the duct connector,
Claim 25
Dependent Claim
15 words
said U-shaped trough being substantially filled with air resistant sealing means to prevent air leakage,
Claim 26
Dependent Claim
15 words
said U-shaped trough being substantially filled with air resistant sealing means to prevent air leakage,
Claim 27
Dependent Claim
16 words
The invention of claim 2 wherein the said filler piece is integral with the duct connector.
Claim 28
Dependent Claim
21 words
The invention of claim 3 wherein the sealing means helps seal the peripheral connection between the skirt and the filler piece.
Claim 29
Dependent Claim
40 words
said U-shaped trough peripherally overfitting the outer Periphery of the fire damper frame and squeezing the sealing means therebetween, a. said sealing means sealing all voids between the periphery of the frame and the trough to prevent air leakage therethrough,
Claim 30
Dependent Claim
40 words
said U-shaped trough peripherally overfitting the outer Periphery of the fire damper frame and squeezing the sealing means therebetween, a. said sealing means sealing all voids between the periphery of the frame and the trough to prevent air leakage therethrough,
Claim 31
Dependent Claim
40 words
The invention of claim 4 wherein the U-shaped trough extends from the plane of the skirt in the direction of the associated portion of the duct a distance sufficient to position the filler piece interiorly of the fire damper frame.
Claim 32
Dependent Claim
22 words
the skirt of the frame connection member overlying the filler piece of the duct adaptor in a substantially air tight, peripheral connection.
Claim 33
Dependent Claim
22 words
the skirt of the frame connection member overlying the filler piece of the duct adaptor in a substantially air tight, peripheral connection.
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) | 1977-04-01 | 1977-10-01 | 1978-04-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-04-01 | 1981-10-01 | 1982-04-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-04-01 | 1985-10-01 | 1986-04-02 | $7700.00 | Window Closed / Lapsed |