Patent US4397418A successfully refreshed from Google Patents.
US4397418A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Control unit for central heating systems
Assignee: VADSTENA PUMPAR AB
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Filing: 1980-03-19
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Granted: 1983-08-09
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Expires: 2000-03-19
Abstract
Abstract The invention relates to a control unit comprising two bodies, one of which is located in a main fluid-distributing section, such as a hot water heating system. A shunt valve in this main section body provides for shunting the hot water, of a boiler in the main section, between different channels which are enclosed within the two bodies. The second body section is located in a group flow-distributing section, and may be used in conjunction with a circulating pump. The two bodies are connected to each other via a mechanical heat-blocking device, made of a material having a heat conductivity figure which is lower than λ=1.00 kcal/m h °C. This heat-blocking device also establishes a communication for fluid flow between the channels, enclosed in the two bodies.
Inventors
- 👤 Lars S. Johansson
- 👤 Bert S. Nordqvist
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 02:50
CPC Classifications
F; F24; F24D; F24D19/00; F24D19/10; F24D19/1006; F24D19/1009; F24D19/1015; F24D19/1021; Y; Y10; Y10T; Y10T137/00; Y10T137/6416; Y10T137/6497; Y10T137/8593; Y10T137/85954
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
129 words
A fluid flow control unit for central heating systems, said unit comprising two independent bodies, shunt valve means in one of said bodies for selectively shunting fluid in a main fluid-distributing section, circulating pump means in the other body for distributing said fluid to a group fluid-distributing section, each of said independent bodies having inlet and outlet openings for connecting flow and return pipes of the respective fluid-distributing sections thereto, channel means enclosed within each of said bodies, and means for mechanically interconnecting said two independent bodies via a mechanical heat-blocking means made of a material having a heat conductivity figure which is lower than γ=1.00 kcal/m h °C., said interconnection of the two bodies connecting the channels of the first body to the channels of the second body.
Claim 2
Dependent Claim
129 words
A fluid flow control unit for central heating systems, said unit comprising two independent bodies, shunt valve means in one of said bodies for selectively shunting fluid in a main fluid-distributing section, circulating pump means in the other body for distributing said fluid to a group fluid-distributing section, each of said independent bodies having inlet and outlet openings for connecting flow and return pipes of the respective fluid-distributing sections thereto, channel means enclosed within each of said bodies, and means for mechanically interconnecting said two independent bodies via a mechanical heat-blocking means made of a material having a heat conductivity figure which is lower than γ=1.00 kcal/m h °C., said interconnection of the two bodies connecting the channels of the first body to the channels of the second body.
Claim 3
Dependent Claim
137 words
A fluid flow control unit for central heating systems, said unit comprising two independent bodies, shunt valve means in one of said bodies for selectively shunting fluid in a main fluid-distributing section, circulating pump means in the other body for distributing said fluid to a group fluid-distributing section, each of said independent bodies having inlet and outlet openings for connecting flow and return pipes of the respective fluid-distributing sections thereto, channel means enclosed within each of said bodies, and means comprising non-return valves in a mechanical heat-blocking means for mechanically interconnecting said two independent bodies, said mechanical heat-blocking means being made of a material having a heat conductivity figure which is lower than λ=1.00 kcal/m h °C., said interconnection of the two bodies connecting the channels of the first body to the channels of the second body.
Claim 4
Dependent Claim
137 words
A fluid flow control unit for central heating systems, said unit comprising two independent bodies, shunt valve means in one of said bodies for selectively shunting fluid in a main fluid-distributing section, circulating pump means in the other body for distributing said fluid to a group fluid-distributing section, each of said independent bodies having inlet and outlet openings for connecting flow and return pipes of the respective fluid-distributing sections thereto, channel means enclosed within each of said bodies, and means comprising non-return valves in a mechanical heat-blocking means for mechanically interconnecting said two independent bodies, said mechanical heat-blocking means being made of a material having a heat conductivity figure which is lower than λ=1.00 kcal/m h °C., said interconnection of the two bodies connecting the channels of the first body to the channels of the second body.
Claim 5
Dependent Claim
31 words
The control unit according to either claim 1 or claim 2, wherein the heat-blocking means is made of a material having a heat conductivity figure lower than λ=0.30 kcal/m h °C.
Claim 6
Dependent Claim
30 words
The control unit according to either claim 1 or claim 2, wherein said two bodies are made of a material having the low heat conductivity figure of the heat-blocking means.
Claim 7
Dependent Claim
127 words
Fluid flow control means comprising two independent bodies, a pair of inlet means and a pair of outlet means in said two bodies being interconnected by a fluid channel between said two independent bodies, said interconnecting channel having a heat barrier means therein, said heat barrier means comprises a pair of non-metallic, non-crystalline, one-way valves positioned in said channels, means for connecting one fluid flow distributing system to said fluid flow control means via a first of said inlets and a first of said outlets, means for connecting a second fluid flow distributing system to said fluid flow control means via a second of said inlets and a second of said outlets, said heat barrier means having a heat conductivity characteristic λ=1.00 kcal/m h °C. or less.
Claim 8
Dependent Claim
127 words
Fluid flow control means comprising two independent bodies, a pair of inlet means and a pair of outlet means in said two bodies being interconnected by a fluid channel between said two independent bodies, said interconnecting channel having a heat barrier means therein, said heat barrier means comprises a pair of non-metallic, non-crystalline, one-way valves positioned in said channels, means for connecting one fluid flow distributing system to said fluid flow control means via a first of said inlets and a first of said outlets, means for connecting a second fluid flow distributing system to said fluid flow control means via a second of said inlets and a second of said outlets, said heat barrier means having a heat conductivity characteristic λ=1.00 kcal/m h °C. or less.
Claim 9
Dependent Claim
39 words
The fluid flow control means of claim 5 and means associated with one associated pair of said inlets and outlets for selectively controlling the proportion of mixture between the fluids in the first and second fluid flow distributing systems.
Claim 10
Dependent Claim
31 words
The fluid flow control means of claim 5 and means associated with one associated pair of said inlets and outlets for driving fluid through one of said fluid flow distributing systems.
References Cited (Backward Citations)
US3124424A
Cited
US3934609A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1986-08-08 | 1987-02-07 | 1987-08-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1990-08-08 | 1991-02-07 | 1991-08-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1994-08-08 | 1995-02-07 | 1995-08-09 | $7700.00 | Window Closed / Lapsed |