US3788083A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of fitting piping for a hot or cold fluid
Assignee: RORKONSULT FOR FJARRVARMEI OREBRO SW AB
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Filing: 1971-11-15
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Granted: 1974-01-29
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Expires: 1991-11-15
Abstract
Abstract A piping for a hot or a cold fluid may be exposed to harmful stresses when the fluid in the piping changes its temperature. So-called compensators have been used for reducing said stresses. According to the invention the compensators may be omitted if the piping is heated to a temperature between its minimum and maximum operating temperature before it is fixed in the desired position.
Inventors
- 👤 J Lundgren
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 22:59
CPC Classifications
F; F16; F16L; F16L51/00; F16L3/00; Y; Y10; Y10T; Y10T29/00; Y10T29/49; Y10T29/49758; Y10T29/4976; Y10T29/49826; Y10T29/49863
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
119 words
Method of mounting a hot water pipe in a district heating system in a fixed position for use in conveying hot water which flows through the piping at an operating temperature range of minimum to maximum temperatures above the ambient temperature, comprising the steps of locating a continuous length of piping from a source to a point of use, bringing the piping to a temperature within the range of its operating temperature by flowing hot water through the piping and permitting it to change length freely in response to the temperature to which it is heated by the hot water, and while maintaining the piping at the temperature in its operating rangE, fixing the piping in the use position.
Claim 2
Dependent Claim
119 words
Method of mounting a hot water pipe in a district heating system in a fixed position for use in conveying hot water which flows through the piping at an operating temperature range of minimum to maximum temperatures above the ambient temperature, comprising the steps of locating a continuous length of piping from a source to a point of use, bringing the piping to a temperature within the range of its operating temperature by flowing hot water through the piping and permitting it to change length freely in response to the temperature to which it is heated by the hot water, and while maintaining the piping at the temperature in its operating rangE, fixing the piping in the use position.
Claim 3
Dependent Claim
26 words
Method, as set forth in claim 1, characterized by fixing the piping in the use position by fastening it at predetermined intervals to concrete attachment members.
Claim 4
Dependent Claim
174 words
Method of mounting a hot water pipe in a district heating system in a fixed position for use in conveying hot water which flows through the piping within an operating temperature range of minimum to maximum temperatures above the ambient temperature, comprising the steps of locating a continuous length of piping in a position for use within an excavated earth trench from a source to a position of use, bringing the piping to a temperature within the range of its operating temperature by flowing hot water through the piping and permitting it to change length freely in response to the temperature to which it is heated by the hot water, and while maintaining the piping at the temperature in its operating range, fixing the piping in the use position by fastening it at predetermined intervals to attachment members and by backfilling the earth about the pipe so that the pressure of the backfilled earth holds the piping in the position attained when it is brought to temperature within the range of its operating temperature.
Claim 5
Dependent Claim
174 words
Method of mounting a hot water pipe in a district heating system in a fixed position for use in conveying hot water which flows through the piping within an operating temperature range of minimum to maximum temperatures above the ambient temperature, comprising the steps of locating a continuous length of piping in a position for use within an excavated earth trench from a source to a position of use, bringing the piping to a temperature within the range of its operating temperature by flowing hot water through the piping and permitting it to change length freely in response to the temperature to which it is heated by the hot water, and while maintaining the piping at the temperature in its operating range, fixing the piping in the use position by fastening it at predetermined intervals to attachment members and by backfilling the earth about the pipe so that the pressure of the backfilled earth holds the piping in the position attained when it is brought to temperature within the range of its operating temperature.
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) | 1977-01-28 | 1977-07-30 | 1978-01-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-01-28 | 1981-07-30 | 1982-01-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-01-28 | 1985-07-30 | 1986-01-29 | $7700.00 | Window Closed / Lapsed |