US4493173A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Automatic cable passage closure and sealing device
Assignee: Walker Systems Inc
•
Filing: 1981-01-23
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Granted: 1985-01-15
•
Expires: 2001-01-23
Abstract
Abstract An automatic electric cable passage closure and sealing device, for positioning in an opening in a structure such as a floor or wall, etc., for passing or connecting a cable or cables and cable conduits therethrough, the device automatically expanding and sealing itself and the cables and cable conduits in the structural opening on occurrence of excess heat or fire. The device comprises a hollow conducting casing to be positioned in a cable or conduit passage in the structure, said casing having novel means effectuating automatic movement and expansion of intumescing, fire retarding, means on occurrence of fire or highly elevated temperatures, said intumescing means pressing through the cables insulation and onto the conductor wires interiorly of the cables. Said wires are thereby automatically sealed in the casing, and in the structure, said intumescing means expanding in and around the casing, completely filling the casing and the floor or wall opening wherein the casing is positioned, automatically forming a unitary and continuous closure of the structure wherein the device is positioned, preventing passage of heat or flames therethrough.
Inventors
- 👤 John E. Kohaut
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 10:24
CPC Classifications
H; H02; H02G; H02G3/00; H02G3/22; F; F16; F16L; F16L5/00; F16L5/02; F16L5/04
Claims Analysis
Total Claims: 36
Claim 1
Independent Claim
134 words
An automatic cable sealing device for positioning in a floor or other opening through which cables may be passed, to automatically protect and seal said cables therein on occurrence of excess heat or fire, said device comprising: (a) a hollow casing, to be positioned in said opening, (b) guide means in said casing, (c) a first automatically sealing plate movably disposed on said guide means for movement of said plate therein, and (d) a thermally activated expanding fire sealing coating on said plate, whereby said sealing plate coating will automatically form and expand under pressure when exposed to fire or substantially highly elevated temperatures, automatically moving into position and flowing and closing said casing and closing onto and sealing said cables therein and sealing the floor or wall opening wherein the casing is positioned.
Claim 2
Dependent Claim
134 words
An automatic cable sealing device for positioning in a floor or other opening through which cables may be passed, to automatically protect and seal said cables therein on occurrence of excess heat or fire, said device comprising: (a) a hollow casing, to be positioned in said opening, (b) guide means in said casing, (c) a first automatically sealing plate movably disposed on said guide means for movement of said plate therein, and (d) a thermally activated expanding fire sealing coating on said plate, whereby said sealing plate coating will automatically form and expand under pressure when exposed to fire or substantially highly elevated temperatures, automatically moving into position and flowing and closing said casing and closing onto and sealing said cables therein and sealing the floor or wall opening wherein the casing is positioned.
Claim 3
Dependent Claim
33 words
In an automatic cable conduit device as set forth in claim 1, a second automatic fire sealing plate engaging said guide means, and a thermally activated fire sealing coating on said second plate.
Claim 4
Dependent Claim
16 words
In an automatic cable conduit device as set forth in claim 1, said casing being non-circular.
Claim 5
Dependent Claim
16 words
In an automatic cable conduit device as set forth in claim 1, said casing being rectangular.
Claim 6
Dependent Claim
31 words
In an automatic cable conduit device as set forth in claim 1, said casing having spaced end walls, and said guide means being secured to and extending intermediate the end walls.
Claim 7
Dependent Claim
33 words
In an automatic cable conduit device as set forth in claim 1, said casing having spaced end walls, and said guide means comprising guide bars secured to and extending intermediate said end walls.
Claim 8
Dependent Claim
37 words
In an automatic cable conduit device as set forth in claim 1, said guide means comprising guide bars secured to said casing and extending interiorly thereof intermediate the walls of said casing and in parallel spaced relation.
Claim 9
Dependent Claim
30 words
In an automatic cable conduit device as set forth in claim 1, said guide means comprising guide bars extending interiorly crosswise of the casing and freely passing through said plates.
Claim 10
Dependent Claim
20 words
In an automatic cable conduit device as set forth in claim 1, an intumescent coating on said fire sealing plate.
Claim 11
Dependent Claim
19 words
In an automatic cable conduit device as set forth in claim 1, said sealing plate being of non-intumescent material.
Claim 12
Dependent Claim
19 words
In an automatic cable conduit device as set forth in claim 1, said sealing plate being of metallic material.
Claim 13
Dependent Claim
26 words
In automatic electric cable conduit sealing device as set forth in claim 1, spaced guide means in said casing for movement of said sealing plate thereon.
Claim 14
Dependent Claim
19 words
In an automatic cable conduit device as set forth in claim 1, said fire sealing plate being thermally sensitive.
Claim 15
Dependent Claim
19 words
In an automatic cable conduit device as set forth in claim 1, said fire sealing means being waterglass means.
Claim 16
Dependent Claim
16 words
In an automatic cable conduit device as set forth in claim 1, said plate being rectangular.
Claim 17
Dependent Claim
21 words
In an automatic cable conduit device as set forth in claim 1, said plate being slidably disposed on said guide means.
Claim 18
Dependent Claim
51 words
In an automatic cable conduit device as set forth in claim 1, said casing having end walls, means connecting said end walls in spaced parallel relation, said plate and guide means being complementarily formed for so movably disposing the plate on said guide means intermediate the end walls of the casing.
Claim 19
Dependent Claim
41 words
In an automatic cable conduit device as set forth in claim 1, a second guide means in said casing, a second automatic fire sealing plate engaging said second guide means, and a thermally activated fire sealing coating on said second plate.
Claim 20
Dependent Claim
132 words
An automatic sealing device for positioning in a floor or wall opening through which cables may be passed, to automatically protect floor or wall and seal said cables therein occurrence of excess heat or fire, said device comprising: (a) a hollow casing, to be positioned in said opening, (b) guide means in said casing, (c) sealing plates movably disposed on said guide means for movement of said plates in said casing, and (d) one or more thermally active expanding coatings on each plate, whereby said fire sealing plate coatings will automatically foam and expand under pressure when exposed to fire or substantially highly elevated temperatures, automatically moving into position and flowing and closing said casing and sealing said cables therein and in the floor or wall opening wherein the casing is positioned.
Claim 21
Dependent Claim
132 words
An automatic sealing device for positioning in a floor or wall opening through which cables may be passed, to automatically protect floor or wall and seal said cables therein occurrence of excess heat or fire, said device comprising: (a) a hollow casing, to be positioned in said opening, (b) guide means in said casing, (c) sealing plates movably disposed on said guide means for movement of said plates in said casing, and (d) one or more thermally active expanding coatings on each plate, whereby said fire sealing plate coatings will automatically foam and expand under pressure when exposed to fire or substantially highly elevated temperatures, automatically moving into position and flowing and closing said casing and sealing said cables therein and in the floor or wall opening wherein the casing is positioned.
Claim 22
Dependent Claim
16 words
In an automatic cable conduit device as set forth in claim 19, said casing being non-circular.
Claim 23
Dependent Claim
16 words
In an automatic cable conduit device as set forth in claim 19, said casing being rectangular.
Claim 24
Dependent Claim
33 words
In an automatic cable conduit device as set forth in claim 19, said casing having spaced end walls and said guide means being secured to said end walls and extending intermediate the same.
Claim 25
Dependent Claim
33 words
In an automatic cable conduit device as set forth in claim 19, said casing having spaced end walls, and said guide means comprising guide bars secured to and extending intermediate said end walls.
Claim 26
Dependent Claim
37 words
In an automatic cable conduit device as set forth in claim 19, said guide means comprising guide bars secured to said casing and extending interiorly thereof intermediate the walls of said casing and in parallel spaced relation.
Claim 27
Dependent Claim
29 words
In an automatic cable conduit device as set forth in claim 19, said guide means comprising guide bars extending interiorly crosswise of the casing and passing through said plates.
Claim 28
Dependent Claim
19 words
In an automatic cable conduit device as set forth in claim 19, said fire sealing plates having intumescent coatings.
Claim 29
Dependent Claim
19 words
In an automatic cable conduit device as set forth in claim 19, said plates being made of non-intumescent material.
Claim 30
Dependent Claim
26 words
In an automatic cable conduit sealing device as set forth in claim 19, guide means in said casing for spaced parallel movement of said plates thereon.
Claim 31
Dependent Claim
19 words
In an automatic cable conduit device as set forth in claim 19, said fire retarding means being waterglass means.
Claim 32
Dependent Claim
18 words
In an automatic cable conduit device as set forth in claim 19, said fire retarding plates being rectangular.
Claim 33
Dependent Claim
64 words
In an electric cable conduit device as set forth in claim 19, said casing having end walls, means connecting said end walls in spaced parallel relation, said guide means being so disposed in said casing intermediate the end walls, and said plates and said guide means being complementarily formed for so movably disposing the plates on said guide means and intermediate the end walls.
Claim 34
Independent Claim
206 words
A device for enabling passage of a cable therethrough, adapted to prevent passage of fire, smoke, or gas therethrough, comprising: (a) means for preventing passage of fire, smoke, or gas through the device, comprised of intumescent material, adapted to be movably positioned in the device, comprising a sheet of intumescent material, having an opening therein for enabling the sheet to be movably positioned; and (b) means for movably positioning the preventing means in the device, adapted to enable the preventing means to be initially movable along a guided path into a position permitting a cable or a plurality of cables to extend loosely through the device, and to be automatically movable along a guided path upon intumescing of the intumescent material into a position closer to the cable or cables, for filling and sealing the device and sealing the cables under pressure, and further adapted to form a path for conducting heat to the intumescent material, comprising a frame, adapted to be positionable on a support surface, and a rod, mounted in the frame and extending lengthwise therein, on which the preventing means are adapted to be movably mounted, adapted to guide movement of the preventing means, the frame and rod being comprised of heat-conducting material.
Claim 35
Independent Claim
206 words
A device for enabling passage of a cable therethrough, adapted to prevent passage of fire, smoke, or gas therethrough, comprising: (a) means for preventing passage of fire, smoke, or gas through the device, comprised of intumescent material, adapted to be movably positioned in the device, comprising a sheet of intumescent material, having an opening therein for enabling the sheet to be movably positioned; and (b) means for movably positioning the preventing means in the device, adapted to enable the preventing means to be initially movable along a guided path into a position permitting a cable or a plurality of cables to extend loosely through the device, and to be automatically movable along a guided path upon intumescing of the intumescent material into a position closer to the cable or cables, for filling and sealing the device and sealing the cables under pressure, and further adapted to form a path for conducting heat to the intumescent material, comprising a frame, adapted to be positionable on a support surface, and a rod, mounted in the frame and extending lengthwise therein, on which the preventing means are adapted to be movably mounted, adapted to guide movement of the preventing means, the frame and rod being comprised of heat-conducting material.
Claim 36
Dependent Claim
16 words
A device as in claim 32, in which the frame and rod are comprised of metal.
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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) | 1988-01-15 | 1988-07-16 | 1989-01-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1992-01-15 | 1992-07-16 | 1993-01-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1996-01-15 | 1996-07-16 | 1997-01-15 | $7700.00 | Window Closed / Lapsed |