US4214698A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Arrangement for control of the temperature of heat radiators in a co-tube system
Assignee: Tour and Andersson AB
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Filing: 1978-11-20
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Granted: 1980-07-29
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Expires: 1998-11-20
Abstract
Abstract A heat control system for a discontinuously operated heat radiator of the co-tube type is disclosed. A thermostat located away from the radiator controls the opening and closing means of an inlet steam valve located between the steam feeder connection and the radiator. A condensed water outlet valve also located between the steam feeder connection and the radiator is normally biased closed by its own weight. When the inlet steam valve is open the steam pressure on each side of the outlet valve is equal and the outlet valve remains closed as the steam entering the radiator is condensed and backs up behind it. However, when the inlet steam valve is closed, the steam pressure in the radiator is eliminated so that the steam pressure in the steam feeder connection acts on the outlet valve to push it open and allow the condensed water to drain from the radiator into the steam feeder connection.
Inventors
- 👤 Hans E. Josefsson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 14:16
CPC Classifications
G; G05; G05D; G05D23/00; G05D23/01; G05D23/12; G05D23/125; G05D23/126; Y; Y10; Y10T; Y10T137/00; Y10T137/2931; Y10T137/3003; Y10T137/3021; Y10T137/304; Y10T137/8593; Y10T137/87265
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
215 words
A heat control system for a discontinuously operated heat radiator of the co-tube type in which the steam feeder connection also acts as a return for condensed water comprising: a thermostat which is placed away from the radiator; an inlet steam valve between the steam feeder connection and the radiator; means for moving said steam valve to an open or a closed position in response to an indication from said thermostat; and a condensed water outlet valve between the steam feeder connection and the radiator, said outlet valve being of the return blocking type in which said outlet valve is normally biased closed by its own weight and the weight of any condensed water in the radiator; such that in response to an indication from said thermostat, said moving means opens said inlet steam valve allowing steam to enter the radiator from the steam feeder connection and heat a room, the condensed water in the radiator being prevented from entering the steam feeder connection by said outlet valve whereby when said inlet valve is later closed, the steam pressure in the radiator drops and the steam pressure in the steam feeder connection pushes said outlet valve open allowing the condensed water in the radiator to drain from the radiator back through the steam feeder connection.
Claim 2
Dependent Claim
215 words
A heat control system for a discontinuously operated heat radiator of the co-tube type in which the steam feeder connection also acts as a return for condensed water comprising: a thermostat which is placed away from the radiator; an inlet steam valve between the steam feeder connection and the radiator; means for moving said steam valve to an open or a closed position in response to an indication from said thermostat; and a condensed water outlet valve between the steam feeder connection and the radiator, said outlet valve being of the return blocking type in which said outlet valve is normally biased closed by its own weight and the weight of any condensed water in the radiator; such that in response to an indication from said thermostat, said moving means opens said inlet steam valve allowing steam to enter the radiator from the steam feeder connection and heat a room, the condensed water in the radiator being prevented from entering the steam feeder connection by said outlet valve whereby when said inlet valve is later closed, the steam pressure in the radiator drops and the steam pressure in the steam feeder connection pushes said outlet valve open allowing the condensed water in the radiator to drain from the radiator back through the steam feeder connection.
Claim 3
Dependent Claim
33 words
A heat control system according to claim 1, in which the valve openings of the valves concerned are provided in a common separation wall through the valve casing containing both of the valves.
Claim 4
Dependent Claim
24 words
A heat control system according to claim 2, in which the steam valve is situated at a higher level than the condensed water valve.
Claim 5
Dependent Claim
33 words
A heat control system according to claim 1, in which the steam valve has a valve seat and a valve body, leaving only a narrow slot free when opened to pass steam therethrough.
Claim 6
Dependent Claim
40 words
A heat control system according to claim 4, in which the valve body is carried up by a valve stem under influence of a spring tending to open the valve, the movement means acting against the action of said spring.
Claim 7
Dependent Claim
29 words
A heat control system according to claim 1, in which the movement means is controlled by the thermostat under interaction of a pressure medium inside of a capillary tube.
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) | 1983-07-29 | 1984-01-28 | 1984-07-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1987-07-29 | 1988-01-28 | 1988-07-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1991-07-29 | 1992-01-28 | 1992-07-29 | $7700.00 | Window Closed / Lapsed |