US3559660A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Pipe insulation and method of making same
Assignee: Chevron USA Inc
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Filing: 1968-08-28
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Granted: 1971-02-02
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Expires: 1988-08-28
Abstract
Abstract A method and apparatus for insulating pipes in which annular spacers are secured to the pipe along its length. Sheet metal covers encircling the pipe are secured to the spacers and supported by the spacers at the distance required for insulation of the desired thickness. Liquids capable of reacting rapidly to form a solid foam of excellent insulating characteristics are injected into the annular space between the pipe and the sheet metal cover to fill that space with the foam insulation material.
Inventors
- 👤 Carl L Rollins
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 12:09
CPC Classifications
F; F16; F16L; F16L59/00; F16L59/04; F16L59/12
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
167 words
Pipe insulation comprising plastic annular spacers secured at intervals along the length of pipe; said spacers comprising a heavy outer rim of substantial width, thin substantially sectorial webs extending inwardly from the outer rim a distance adapted to engage the outer surface of the pipe, said webs being spaced from adjacent webs to provide openings through the spacers when the spacers are in position on the pipe, flanges at the edges of the sectorial webs having substantially the same width as the outer rim, a radial cut extending through the rim and continuing at least to the center to permit installation of the spacers around the pipe; connecting means extending across the cut to hold the free ends of the spacers together and the spacers in place on the pipe; sheet metal wrapped around the spacers and secured thereto to form a cylindrical cover surrounding and spaced from the pipe; and foam insulation formed in situ filling the space between the pipe and the sheet metal cover.
Claim 2
Dependent Claim
167 words
Pipe insulation comprising plastic annular spacers secured at intervals along the length of pipe; said spacers comprising a heavy outer rim of substantial width, thin substantially sectorial webs extending inwardly from the outer rim a distance adapted to engage the outer surface of the pipe, said webs being spaced from adjacent webs to provide openings through the spacers when the spacers are in position on the pipe, flanges at the edges of the sectorial webs having substantially the same width as the outer rim, a radial cut extending through the rim and continuing at least to the center to permit installation of the spacers around the pipe; connecting means extending across the cut to hold the free ends of the spacers together and the spacers in place on the pipe; sheet metal wrapped around the spacers and secured thereto to form a cylindrical cover surrounding and spaced from the pipe; and foam insulation formed in situ filling the space between the pipe and the sheet metal cover.
Claim 3
Dependent Claim
34 words
Insulation as set forth in claim 1 in which the radial cut extends through the outer rim and a web, and the connecting means are staples extending through the web and spanning the cut.
Claim 4
Dependent Claim
27 words
Apparatus as set forth in claim 1, in which securing means extend through the cover and the rim to hold the cover in place on the spacers.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-02-01 | 1974-08-03 | 1975-02-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-02-01 | 1978-08-03 | 1979-02-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-02-01 | 1982-08-03 | 1983-02-02 | $7700.00 | Window Closed / Lapsed |