Housing arrangement for fire-endangered installations

• US 5,269,378 A
• Filed: 09/30/1992
• Issued: 12/14/1993
• Est. Priority Date: 05/19/1990
• Status: Expired due to Fees

• Current Assignee: Datwyler Kabel + Systeme GmbH
• Original Assignee: Bayer AG
• Inventors: Schte,uml/a/ pel, Dietmar, Maas, Willi
• Primary Examiner(s): Mitchell, David M.
• Assistant Examiner(s): Pike, Andrew C.
• Application Number:
  US07/954,597
• Time in Patent Office: 440 Days
• Field of Search: 169/26, 169/48, 169/54, 169/57
• US Class Current: 169/48
• CPC Class Codes: A62C 3/16 in electrical installations, e.g. cableways
• CPC Class Codes: H02G 3/088 Dustproof, splashproof, drip-proof, waterproof, or flameproof casings or inlets

Abstract

Fire-endangered installations arranged in commercially available housings (1) are kept operable for longer on exposure to fire if they are covered, in the mounted state, by a protective housing (5) made from a fire-protection composition which foams up on exposure to fire.

Claims

1. A protective enclosure for fire-endangered installations comprising:

a first housing (1) having a base surface and an outer surface;

at least one cable or pipe connected to said first housing;

a second housing (5) comprising a foamable fire-protection composition formed into a solid molded article having an inlet orifice for the cable or the pipe; and

a mounting plate (4) made from the foamable fire-protection composition and mounted on the base surface of the first housing;

wherein the outer surface of the first housing is covered at least in part by the second housing.

2. The protective enclosure according to claim 1, wherein the second housing (5) has a wall thickness of 3 to 50 mm.

3. The protective enclosure according to claim 1, wherein the inlet orifice for the cable or the pipe is packed with a plastically deformable, fire-protection composition.

4. The protective enclosure according to claim 1, wherein intermediate layers (7,8) made from a fire-protection composition are arranged in the inlet orifice (6) of the second housing for the cable or the pipe.

5. The protective enclosure according to claim 1, wherein the second housing is produced by a plastic molding process.

6. The protective enclosure according to claim 1, wherein the foamable fire-protection composition consists of a synthetic resin with filler and fibrous reinforcing material incorporated therein.

7. The protective enclosure according to claim 1, wherein the foamable fire-protection composition consists of layers of synthetic resin with filler and fibrous reinforcing material incorporated therein.

8. The protective enclosure according to claim 1, wherein the fire-protection composition is a polyurethane having a density from 200 to 1,100 kg/m₃.

9. The protective enclosure according to claim 1, wherein the foamable fire protection composition comprises a polymer resin selected from the group consisting of phenolic resins, urea resins, and melamine resins.