Patent US4601426A successfully refreshed from Google Patents.
US4601426A
Expired / Lapsed
US
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Excess-pressure-free boiler and accumulator heating system
Assignee: Individual
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Filing: 1985-01-22
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Granted: 1986-07-22
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Expires: 2005-01-22
Abstract
Abstract The heating system includes water-radiators, a heat source as a boiler and/or one or more water-accumulators, an expansion vessel and a pipe-circulation system interconnecting the radiators and the source through which the water is pumped. The system is intended for one-family-houses with normally at most two floors above a cellar or a basement in which the source is situated. The expansion vessel is contrary to conventional open expansion systems arranged below the levels of the radiators in the boiler room and thus frost-free and immediately above or beside the top of the heat source. Its own top is provided with an open outlet to the atmospheric air in the boiler room. Thus the heat source is exposed approximately only for the very low water-pressure from its own water. Contrary to the heat source the radiators with belonging riser- and return-pipes are exposed to the same high water-pressure as at conventional radiator-systems with the expansion vessel situated above the topmost radiators. This pressure is here caused by a circulation pump for rather high pressure, situated at the lower end of the riser-pipe, which pump works in combination with flow-resistance means at the lower end of the return pipe. This pump-combination causes no external water-pressure on the heat source.
Inventors
- 👤 K. Hilding Brosenius
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 12:35
CPC Classifications
F; F24; F24D; F24D3/00; F24D3/02; F24D11/00; F24D11/002
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
238 words
A hot water heating system for heating of one-family-houses with at most two floors above a cellar, comprising a plurality of water-radiators with belonging riser- and return-pipes and branch-pipes to the radiators, a source of hot water, expansion vessel which has an unbroken water-connection to both radiators and heat source and a circulation pump, wherein the expansion vessel is arranged on a lower level than the radiators and situated immediately above or beside the top of the heat source and therefore causing only an insignificant or neglectible excess-pressure on boiler or accumulators and wherein the expansion vessel on said level is provided with an open outlet to the atmospheric air without that the water from the radiators on a higher level, which water has free water connection to the expansion vessel, escapes through said open outlet and wherein at the same time the radiators and belonging pipes are exposed to a large excess-water pressure corresponding to the level in the system of said parts and wherein last mentioned excess water-pressure is caused by a circulation pump, which is arranged downwards in the riser pipe of the system and which is working in combination with a flow-resistance means which is arranged downwards in the return-pipe of the system and whereby said pump in combination with said flow-resistance means continuously can move the circulation water from an essentially pressure-free heat source to permanently pressure-exposed radiators also at the topmost floor.
Claim 2
Dependent Claim
238 words
A hot water heating system for heating of one-family-houses with at most two floors above a cellar, comprising a plurality of water-radiators with belonging riser- and return-pipes and branch-pipes to the radiators, a source of hot water, expansion vessel which has an unbroken water-connection to both radiators and heat source and a circulation pump, wherein the expansion vessel is arranged on a lower level than the radiators and situated immediately above or beside the top of the heat source and therefore causing only an insignificant or neglectible excess-pressure on boiler or accumulators and wherein the expansion vessel on said level is provided with an open outlet to the atmospheric air without that the water from the radiators on a higher level, which water has free water connection to the expansion vessel, escapes through said open outlet and wherein at the same time the radiators and belonging pipes are exposed to a large excess-water pressure corresponding to the level in the system of said parts and wherein last mentioned excess water-pressure is caused by a circulation pump, which is arranged downwards in the riser pipe of the system and which is working in combination with a flow-resistance means which is arranged downwards in the return-pipe of the system and whereby said pump in combination with said flow-resistance means continuously can move the circulation water from an essentially pressure-free heat source to permanently pressure-exposed radiators also at the topmost floor.
Claim 3
Dependent Claim
106 words
The system of claim 1, wherein the branch-pipe from the bottom-connections to the radiators--at least on the top floor--is connected to the return-pipe for the radiator-system at a somewhat higher level than the top of the radiators on the same floor, and wherein a thin venting pipe is raised a piece upwards from said connections between said branch-pipe and the return pipe, which venting pipe breaks the siphon-action in the return pipe at stop of the circulation pump, and whereby the water content in the radiators will be permanently kept in the radiators at the lowest level of the top-connections of the branch-pipe to the radiators.
Claim 4
Dependent Claim
54 words
The system of claim 1, wherein the water in the radiator-system at a temporary pump-stop, for example by failure of current or mechanical pump-failure, by effect of vacuum in the radiator-system is prevented to escape downwards to said source to another degree than what possible untighnesses reduces the vacuum in an otherwise tight radiator-system.
Claim 5
Dependent Claim
125 words
The system of claim 1, wherein the return-pipe from the radiators at its bottom end is connected to a return-inlet at the bottom of a boiler or an accumulator, and where the riser-pipe to the radiators at its bottom end is connected to a hot-water-outlet at the top of the boiler or accumulator, and wherein during the running-time of the circulation-pump cooled radiator-return-water, which has returned through said return-inlet, by layering-action will press hotter water above in the boiler or in one or more serie-coupled accumulators upwards, which water in turn feeds the riser-pipe with the hotter water in the top of the boiler or in that accumulator, which is the last one in a serie of serie-coupled accumulators, which are affected by said layering-action.
Claim 6
Dependent Claim
160 words
The system of claim 1, wherein between said riser-pipe and said return-pipe is arranged a transverse-pipe, which is provided with an adjustable throttle-valve, the transverse-pipe of which is situated a piece above the the circulation pump in the riser-pipe and a piece above the flow-resistance means in the return pipe, and whereby at initial water-filling of the radiator-system by opening of the valve in the transverse pipe and closing of the flow-resistance valve in the return pipe water from the pressure-side of the circulation pump by pump-pressure from below is caused to flow both through riser- and return-pipes and through radiators with branch-pipes and whereby at the same time in the system existing air before its filling with water is forced to disappear upwards by opening the usual venting device valves of the radiators and whereby at last--after successive closing of the same venting valves--the whole radiator-system with pipes will be completely free from air and filled by circulation water.
Claim 7
Dependent Claim
25 words
The system of claim 1, wherein between riser-pipe and return-pipe in a conventional way is arranged a shunt-pipe with an automatically or manually adjustable shunt-valve.
References Cited (Backward Citations)
US3897903A
Cited
US4392610A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1989-07-21 | 1990-01-20 | 1990-07-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1993-07-21 | 1994-01-20 | 1994-07-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1997-07-21 | 1998-01-20 | 1998-07-22 | $7700.00 | Window Closed / Lapsed |