US4901488A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Fire/smoke protection structure for a plastic pipe or cable channel portion in a floor or wall
Assignee: Furukawa Electric Co Ltd
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Filing: 1988-11-09
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Granted: 1990-02-20
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Expires: 2008-11-09
Abstract
Abstract A fire/smoke protection structure for cable channel portion in a floor or wall includes thermal expansion composite molded members each molded into a desired shape and filled in a gap defined between a cable or the like and the channel portion. Each thermal expansion composite molded member is either a member obtained by coating a non-refractory material on the outer surface of a core consisting of a fire retardant resin foaming body compressed to 90% or less of a normal volume, or a member obtained by coating a thermally foaming fire retardant composition on the outer surface of a core consisting of a refractory material and molded into a desired shape. The fire/smoke protection structure can be easily constructed, maintained and reconstructed at a construction site and can be completely and reliably achieved.
Inventors
- 👤 George Murota
- 👤 Tadashi Naruse
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 17:35
CPC Classifications
H; H02; H02G; H02G9/00; F; F16; F16L; F16L5/00; F16L5/02; F16L5/04; H02G3/00; H02G3/02; H02G3/04; H02G3/0406; H02G3/0412; H02G3/22
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
140 words
A fire/smoke protection structure for filling a gap between an outer surface of a plastic pipe or cable channel portion and a floor or wall, comprising: a plurality of thermal expansion composite molded members each molded into a desired shape; said thermal expansion composite molded members being densely filled to form a filled layer in said gap defined between an inner surface of the floor or wall and said outer surface of said plastic pipe or cable channel portion, and said composite molded members being selectively removable from said gap; and each of said filled expansion composite molded members in said gap comprising a core of a predetermined shape formed of a fire retardant resin foamimg body compressed to not more than 90% of a normal volume thereof, and a non-refractory material coated on the outer surface of said core.
Claim 2
Dependent Claim
140 words
A fire/smoke protection structure for filling a gap between an outer surface of a plastic pipe or cable channel portion and a floor or wall, comprising: a plurality of thermal expansion composite molded members each molded into a desired shape; said thermal expansion composite molded members being densely filled to form a filled layer in said gap defined between an inner surface of the floor or wall and said outer surface of said plastic pipe or cable channel portion, and said composite molded members being selectively removable from said gap; and each of said filled expansion composite molded members in said gap comprising a core of a predetermined shape formed of a fire retardant resin foamimg body compressed to not more than 90% of a normal volume thereof, and a non-refractory material coated on the outer surface of said core.
Claim 3
Dependent Claim
24 words
The structure of claim 1, wherein each of said thermal expansion composite molded members in said gap is in the shape of a column.
Claim 4
Dependent Claim
26 words
The structure of claim 1, wherein each of said thermal expansion composite molded members in said gap is in the shape of a substantially square pillar.
Claim 5
Dependent Claim
27 words
The structure of claim 1, wherein each of said thermal expansion composite molded members in said gap is in the shape of a substantially rectangular square pillar.
Claim 6
Dependent Claim
24 words
The structure of claim 1, wherein each of said thermal expansion composite molded members in said gap is in the shape of a sphere.
Claim 7
Dependent Claim
139 words
A fire/smoke protection structure for filling a gap between an outer surface of a plastic pipe or cable channel portion and a floor or wall, comprising: a plurality of thermal expansion composite molded members each molded into a desired shape; said thermal expansion composite molded members being densely filled to form a filled layer in said gap defined between an inner surface of the floor or wall and said outer surface of said plastic pipe or cable channel portion, and said composite molded members being selectively removable from said gap; and each of said filled expansion composite molded members in said gap comprising a core of a predetermined shape formed of a refractory material, and a coating on said refractory material core, said coating being a thermally foaming fire retardant composition coated on the outer surface of said core.
Claim 8
Dependent Claim
139 words
A fire/smoke protection structure for filling a gap between an outer surface of a plastic pipe or cable channel portion and a floor or wall, comprising: a plurality of thermal expansion composite molded members each molded into a desired shape; said thermal expansion composite molded members being densely filled to form a filled layer in said gap defined between an inner surface of the floor or wall and said outer surface of said plastic pipe or cable channel portion, and said composite molded members being selectively removable from said gap; and each of said filled expansion composite molded members in said gap comprising a core of a predetermined shape formed of a refractory material, and a coating on said refractory material core, said coating being a thermally foaming fire retardant composition coated on the outer surface of said core.
Claim 9
Dependent Claim
24 words
The structure of claim 6, wherein each of said thermal expansion composite molded members in said gap is in the shape of a column.
Claim 10
Dependent Claim
26 words
The structure of claim 6, wherein each of said thermal expansion composite molded members in said gap is in the shape of a substantially square pillar.
Claim 11
Dependent Claim
27 words
The structure of claim 6, wherein each of said thermal expansion composite molded members in said gap is in the shape of a substantially rectangular square pillar.
Claim 12
Dependent Claim
24 words
The structure of claim 6, wherein each of said thermal expansion composite molded members in said gap is in the shape of a sphere.
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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) | 1993-02-19 | 1993-08-21 | 1994-02-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1997-02-19 | 1997-08-21 | 1998-02-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2001-02-19 | 2001-08-21 | 2002-02-20 | $7700.00 | Window Closed / Lapsed |