US4307546A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Fire retardant partitioning for openings for plastic pipe lines
Assignee: Geberit AG
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Filing: 1980-05-08
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Granted: 1981-12-29
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Expires: 2000-05-08
Abstract
Abstract Partitioning for preventing the spread of fire or smoke through wall apertures created by the burning of plastic pipe. Pre-stressed metal squeezing elements are retained by plastic bolts which melt at about 120° C., releasing the squeezing elements and permitting them to squeeze together the heat-softened plastic pipe. An insert of foamable material may additionally be used to supplement the aperture sealing effect.
Inventors
- 👤 Rene Dolder
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 03:59
CPC Classifications
E; E04; E04F; E04F17/00; E04F17/02; E04F17/04; E04F17/08; F; F16; F16L; F16L5/00; F16L5/02; F16L5/04; Y; Y10; Y10T; Y10T137/00; Y10T137/1624; Y10T137/1797; Y10T137/1819; Y10T137/1834
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
73 words
Fire retardant partitioning means for openings for a plastic pipe line through building walls and floors, comprising a housing surrounding a said pipe line, said housing having at least one resilient corrugated metal squeezing element held in a squeezed pre-stressed state by strain bolts which break at a temperature of about 120°, whereby said element is released, and during its tension release squeezes together the pipe line which has become plastic through heating.
Claim 2
Dependent Claim
73 words
Fire retardant partitioning means for openings for a plastic pipe line through building walls and floors, comprising a housing surrounding a said pipe line, said housing having at least one resilient corrugated metal squeezing element held in a squeezed pre-stressed state by strain bolts which break at a temperature of about 120°, whereby said element is released, and during its tension release squeezes together the pipe line which has become plastic through heating.
Claim 3
Dependent Claim
41 words
Partitioning means according to claim 1, wherein said housing with said squeezing element is joined with a second housing having at least one insert of a material which foams up at temperatures above 120° to a multiple of its original volume.
Claim 4
Dependent Claim
12 words
Partitioning means according to claim 2, wherein said material is sodium silicate.
Claim 5
Dependent Claim
12 words
Partitioning means according to claim 2, wherein said material is potassium silicate.
Claim 6
Dependent Claim
40 words
Partitioning means according to claim 2, wherein said second housing comprises two parts each surrounding one-half the circumference of said pipe line and comprising a housing part with a squeezing element as well as an insert having said foamable material.
Claim 7
Dependent Claim
25 words
Partitioning means according to claim 2, wherein said housing with said squeezing element is fitted in a recess of said second housing having said insert.
Claim 8
Dependent Claim
27 words
Partitioning means according to claim 1, wherein said housing has two parts each surrounding one-half the circumference of said pipe line and comprising a said squeezing 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) | 1984-12-28 | 1985-06-29 | 1985-12-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1988-12-28 | 1989-06-29 | 1989-12-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1992-12-28 | 1993-06-29 | 1993-12-29 | $7700.00 | Window Closed / Lapsed |