GB1574564A - Creation of Inventions and Patents with Artificial Intelligence

GB1574564A – Hot water heating system
– Google Patents

GB1574564A – Hot water heating system
– Google Patents
Hot water heating system

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Publication number
GB1574564A

GB1574564A
GB4047/78A
GB404778A
GB1574564A
GB 1574564 A
GB1574564 A
GB 1574564A
GB 4047/78 A
GB4047/78 A
GB 4047/78A
GB 404778 A
GB404778 A
GB 404778A
GB 1574564 A
GB1574564 A
GB 1574564A
Authority
GB
United Kingdom
Prior art keywords
hot water
valve
passage
bypass
heating radiator
Prior art date
1977-02-03
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)

Expired

Application number
GB4047/78A
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)

Denso Corp

Original Assignee
NipponDenso Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
1977-02-03
Filing date
1978-02-01
Publication date
1980-09-10

1977-02-03
Priority claimed from JP1115277A
external-priority
patent/JPS5919846B2/en

1977-07-01
Priority claimed from JP7921377A
external-priority
patent/JPS5413649A/en

1977-07-12
Priority claimed from JP8394877A
external-priority
patent/JPS5930566B2/en

1978-02-01
Application filed by NipponDenso Co Ltd
filed
Critical
NipponDenso Co Ltd

1980-09-10
Publication of GB1574564A
publication
Critical
patent/GB1574564A/en

Status
Expired
legal-status
Critical
Current

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Classifications

B—PERFORMING OPERATIONS; TRANSPORTING

B60—VEHICLES IN GENERAL

B60H—ARRANGEMENTS OF HEATING, COOLING, VENTILATING OR OTHER AIR-TREATING DEVICES SPECIALLY ADAPTED FOR PASSENGER OR GOODS SPACES OF VEHICLES

B60H1/00—Heating, cooling or ventilating [HVAC] devices

B60H1/00485—Valves for air-conditioning devices, e.g. thermostatic valves

B—PERFORMING OPERATIONS; TRANSPORTING

B60—VEHICLES IN GENERAL

B60H—ARRANGEMENTS OF HEATING, COOLING, VENTILATING OR OTHER AIR-TREATING DEVICES SPECIALLY ADAPTED FOR PASSENGER OR GOODS SPACES OF VEHICLES

B60H1/00—Heating, cooling or ventilating [HVAC] devices

B60H1/02—Heating, cooling or ventilating [HVAC] devices the heat being derived from the propulsion plant

B60H1/04—Heating, cooling or ventilating [HVAC] devices the heat being derived from the propulsion plant from cooling liquid of the plant

B60H1/08—Heating, cooling or ventilating [HVAC] devices the heat being derived from the propulsion plant from cooling liquid of the plant from other radiator than main radiator

G—PHYSICS

G05—CONTROLLING; REGULATING

G05D—SYSTEMS FOR CONTROLLING OR REGULATING NON-ELECTRIC VARIABLES

G05D23/00—Control of temperature

G05D23/01—Control of temperature without auxiliary power

G05D23/02—Control of temperature without auxiliary power with sensing element expanding and contracting in response to changes of temperature

Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS

Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC

Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION

Y10T137/00—Fluid handling

Y10T137/8593—Systems

Y10T137/877—With flow control means for branched passages

Y10T137/87708—With common valve operator

Y10T137/8778—Spring biased

Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC

Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION

Y10T137/00—Fluid handling

Y10T137/8593—Systems

Y10T137/877—With flow control means for branched passages

Y10T137/87829—Biased valve

Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC

Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION

Y10T137/00—Fluid handling

Y10T137/8593—Systems

Y10T137/877—With flow control means for branched passages

Y10T137/87909—Containing rotary valve

Description

PATENT SPECIFICATION
( 11) 1 574 564 ( 21) Application No 4047/78 ( 22) Filed 1 Feb 1978 ( 19) ( 31) Convention Application Nos 52/011 152 ( 32) Filed 3 Feb 1977 52/079 21 3 1 July 1977 52/083 948 12 July 1977 in ( 33) Japan (JP) ( 44) Complete Specification published 10 Sept 1980 ( 51) INT CL 3 B 60 H 1/04 F 16 K 11/00 ( 52) Index at acceptance F 4 U 41 F 2 V D 9 B 1 D 9 X E 1 H M 2 H ( 54) HOT WATER HEATING SYSTEM ( 71) We, NIPPONDENSO Co, LTD, a corporation organized under the laws of Japan of 1, 1-chome, Showa-cho, Kariya-shi, Aichi-ken, Japan, do hereby declare the invention for which we pray that a patent may be granted to us, and the method by which it is to be performed, to be particularly des-
cribed in and by the following statement:-
This invention relates to a heating system for use with an internal combustion engine.
In a conventional motor vehicle heating system the engine cooling water is supplied to a heating radiator for heating air flowing therethrough, a hot water flow control valve is provided with a pressure regulating valve which is connected to return the hot water supplied from the cooling water outlet of the engine to the cooling water inlet of the engine when the pressure of the hot water exceeds a predetermined value, thereby controlling hot water supplied into the heating radiator within a predetermined flow rate thus maintaining a comfortable air temperature The maximum heating capacity is therefore limited by the pressure regulating valve.
According to this invention a heating system in which the coolant, usually water, from an internal combustion engine, is supplied to a heating radiator, comprises a by-pass passage communicating between the inlet and outlet, of the heating radiator, a by-pass valve operable to admit a flow of coolant through the by-pass passage when the coolant pressure exceeds a predetermined value, and a main valve for controlling the flow of coolant to the heating radiator, which valve when fully open closes the by-pass passage.
In a system according to this invention the maximum heating capacity is not limited by the pressure responsive valve.
By providing a valve which interrupts the by-pass flow of cooling water when maximum heating capacity is required, irrespective of the pressure of the hot water, system is produced having a higher maximum capacity than conventional systems When the by-pass flow is shut off by the main valve all the coolant flowing from the engine passes through the heating radiator.
Embodiments of the invention will now be described by way of example with reference to the accompanying drawings, of which:
Figures 1 and 2 are cross-sectional views of an embodiment according to the present invention, respectively showing sections taken along line I-I in Figure 2 and line II-II in Figure 1, Figures 3 and 4 show in part cross-sectional perspective views component parts of the embodiment of Figure 2, Figures 5 and 6 are fragmentary crosssectional front and side views of modified embodiments, Figures 7 and 8 show another embodiment according to the present invention, Figure 7 being a cross-sectional side view taken along line VII-VII in Figure 8, and Figure 8 being a cross-sectional front view taken along -line VIII-VIII in Figure 7, Figure 9 is a perspective view showing a component part of the embodiemnt shown in Figure 8, and Figure 10 is a perspective view showing a modified form of the component part shown in Figure 9.
In the embodiment of Figures 1 to 4 first and second casings 1 and 2 generally are made of heat resistive synthetic material such as polyacetal and the like (so called Duracon, or 66 nylon) Die-cast metal such as aluminium or zinc may also be used The first casing 1 has a couple of tubes 3, and 5 within which are passages 4 and 6 respectively.
The passages 4 and 6 are connected to an engine 8 by passages 7 and 9 respectively in the latter case via a water pump 10 Also connected between the passages 7 and 9 are an engine cooling radiator 8 a and a conventional thermostat valve 8 b.
The second casing 2 also has a couple-of tubes 11 and 13 defining therein passages 12 and 14 which are connected to a heating h:f \Z uts 2 1,574,564 2 radiator 15 by passages 17 and 18 To secure the casings together flanges 19 and 20 respectively on casings 1 and 2 are held in abutment by an annular metal binder 21 and sealed by an O ring 22 or annular rubber sheet In a space 23 defined by the assembled casings 1 and 2 is a valve plate 24.
in the form of a segment of a circle preferably made of metal or heat resistive synthetic material such as polyacetal or 66 nylon and having its left side (viewed in Figure 2) a projection 24 a and at its base portion a rectangular aperture 25 The aperture 25 receives a shaft 26 made of brass or the like as shown in Figures 1 and 2 so that the valve plate 24 can be rotated by the shaft 26 The valve plate 24 has a plurality of apertures 27 a, 27 b, 27 c, and 27 d, of different sizes which increase in the above order A groove 28 is also formed on the arched outer periphery of the flow control valve 24 for the purpose same as the above described apertures With the valve 24 in the left most position, the flow of hot water is completely shut off but when the valve 24 is turned from the left to the right the flow increases since the larger of the apertures 27 a, 27 b, 28, 27 c, and 27 d, are effective in defining the area of flow through the valve A lever 29 is connected to the shaft 26 which is rotatably mounted in a bore 30 formed in the first casing, at the end opposite to the valve plate 24, this lever 29 being part of a linkage mechanism remotely controlled from a control panel (not shown) in a well known manner An O ring provides a seal between the first case 1 and the shaft 26.
In an annular groove 31 formed in the second case 2, are a resilient annular sealing plate 32 made of stainless, high carbon steel or heat resistive synthetic resin such as polyacetal or 66 nylon, and an O ring 33 A flanged cylindrical spring guide 34 of polyacetal or like material carries a coil spring urging the flow control valve plate 24 against the sealing plate 32 The spring guide 34 has an annular groove 36 on the surface containing the valve plate 24, thereby enlarging the contacting area.
A passage 37 is defined between the first and second casings 1 and 2 as a bypass for hot water from the upper passage 4 to the lower passage 6 both of the first case 1 as indicated by an arrow a A bypass valve 38 in the bypass passage 37 (Figures 2 and 4) opens or closes the bypass passage 37 in response to the pressure of the hot water flowing therethrough The bypass valve 38 is made of resilient metal such as stainless steel so that it deforms to open or close in response to the water pressure exerted thereon Figure 4 is a section of the bypass valve in the open condition and shows valve seats 39 and 40 respectively on the first and second casings 1 and 2, a valve aperture 41 and valve supports 44 and 42 also on the casings 1 and 2 respectively.
The part of the bypass valve (not shown) has a similar construction The flow control valve plate 24 carries, on its side surface facing the bypass valve 38, a sealing sheet 45 made of silicon rubber or other heat resistive sealing material This sealing sheet 45 is seated on the valve supports 42 and 44 when the flow control valve 24 is turned to the right as viewed in Figure 2 to obtain the maximum heating capacity to thereby close the valve aperture 41 A lever 46 having a pin 46 a and a projection 46 b is disposed with the pin mounting in a chamber 47 The pin 46 a projects from a stopper surface 48 through a recess 48 a into which the projection 24 a enters to push the pin 46 a when the flow control valve is turned to the left in Figure 2 The projection 46 b of the lever 46 is positioned directly beneath the bypass valve 38 A coil spring 50 in the chamber 47 urges the pin 46 a upwardly.
When the pin 46 a is depressed by the projection 24 a against the action of coil spring 50, the lever 46 pivots about a support 49 providing a fulcrum, to lift the projection 46 b, thereby operating the bypass valve 38 to close the aperture 41.
When heating is not required, the flow control valve 24 is turned to its left most position, wherein the hot water supply from the engine is shut off and the projection 24 a engages the pin 46 a to tilt the lever 46, and, accordingly, closes the bypass valve as shown in double-dotted chain lines in Figure 2.
As a result even when the pressure of the engine coolant exceeds that necessary to open the bypass valve 38, no coolant flows therethrough so that all the engine coolant can be utilized to cool the engine, which is 105 very effective in summer.
When moderate heating is required, the flow control valve 24 is turned from the left most position to a middle position where one of apertures 27 a, 27 b, 28 and 27 c com 110 municates the right passage 4 and the left passage 12 so that hot water is supplied from the engine 8 to the heating radiator 15 through the passages 7, 4, one of the above apertures (in Figure 1, 27 b is illustrated), 115 passages 12 and 17 When the pressure of the hot water supplied from the engine by the water pump 10 increases as engine speed increases, the pressure difference between the pressure on the both sides of the bypass 120 valve increases finally to open same so that the hot water flows from the upper passage 4 to the lower passage 6 through the valve as indicated by arrows a On the other hand, the bypass valve 38 closes when the hot water 125 pressure decreases, thus regulating the hot water pressure Consequently, the flow rate of hot water supplied to the radiator 15 is maintained constant irrespective of engine speed or other factors which offset the hot 130 1,574,564 1,574,564 water pressure, once the flow control valve 24 has been set This ensures a constant temperature.
When the flow control valve 24 is turned to the extreme right to obtain maximum heat, the largest aperture 27 d of the flow control valve 24 communicates between the right and left passages 4 and 12 At the same time, the aperture 41 is closed by the sealing sheet 45 so that no hot water flows through the bypass valve irrespective of the hot water pressure All the hot water flowing through the passages 7 and 4 is therefore supplied to the heating radiator, thus ensuring the maximum heating capacity when the hot water pressure increases.
The lever 46 can be omitted if the cooling capacity of the engine radiator is large enough to prevent overheating even when the bypass valve opens to bypass the engine coolant in very hot weather.
Figure 5 and Figure 6 show respectively modified bypass valves 38 Figure 5 shows a valve 38 having a T-shaped cross-section and a coil spring 38 a urging the valve against the valve seats 39 and 40 Figure 6 shows the stem of a similar T-shaped valve 38 (the cross-piece of the T-shaped valve being omitted for clarity) disposed in a support tube 51 having a flanged opening on which the valve is seated and a coil spring 38 a The tube 51 is disposed in a recess 52 formed in the first casing so that the front surface 24 b of the flow control valve plate 24 slides on the flanged opening of the support tube 51 to close same when the flow control valve plate 24 is turned to the right most position.
A partition 53 integral with the second casing shuts off the hot water bypass flow in co-operation with the valve plate 24.
Figures 7 to 9 show another embodiment of the present invention, in which features in common with the embodiments described above are designated by the same reference numerals The main difference is the flow control valve plate 24 which is formed with a bypassing recess 124 and lands 24 c and 24 d (Figure 9) in order to obviate the need for the lever 46 of earlier embodiment The valve plate 24 is disposed between the casings 1 and 2 as in the first embodiment Annular groove 131 in the first casing 1 contains an 0-ring seal 133 annular sealing plate 132 being disposed between the valve plate 24 and the 0-ring 133, in a similar manner to the sealing plate 32 and the 0-ring 33.
Lands 24 c and 24 d (dotted lines) and the bypass recess 134 between the above lands to be communicated with the bypass passage 37 as shown in Figure 7 by an arrow a The recess 134 is surrounded by arched walls 134 a, 134 b, 134 c and 134 d and the largest aperture 27 d is surrounded by the land 24 d which covers the flat portion of the annular sealing plate 132 when the valve plate 24 is in the 65 maximum heating position.
The operation of this embodiment is substantially the same as for the former embodiment except when the valve plate 24 is in the extreme left most and right most 70 positions When the valve plate 24 is in the left most position the land 24 c interrupts the flow of hot water to the radiator and, at the same time, closes the bypass passage 37, thereby preventing the hot water from by 75 passing therethrough As a result, even under a high water pressure when the bypass valve otherwise opens, all the coolant is utilized to cool the engine so that overheating in hot weather can be prevented 80 When the valve plate 24 is in the right most position, the largest aperture 27 d communicates with the right and left passages 4 and 12 to supply the maximum flow rate of hot water to the radiator At the same time, 85 the land portion 24 d which surrounds the aperture 27 d comes into contact with the flat portion of the sealing plate 132, thereby interrupting the hot water flowing to the bypass valve 38 As a result, even under a 90 pressure so high that the bypass valve would otherwise open, all the hot water supplied from the engine to passage 7 can be utilized for heating and, therefore, the maximum heating capacity is enhanced 95 Figure 10 shows a modified valve plate 24 which comprises a pair of plate members 24 e and 24 f In the plate member 24 e, a groove 24 g is formed so that it connects the recess 134 which is formed in the upper plate 100 member 24 e with the bypassing passage 37 therethrough The function of the valve plate is substantially the same as that shown in Figure 9.

Claims (9)

WHAT WE CLAIM IS:-

1 A heating system in which the coolant from an internal combustion engine is supplied to a heating radiator and comprising a bypass passage communicating between the inlet 110 and outlet of the heating radiator, a bypass valve operable to admit a flow of coolant through the bypass passage when the coolant pressure exceeds a predetermined value, and a main valve for controlling the flow of 115 coolant to the heating radiator, which valve when fully open closes the bypass passage.

2 A heating system according to claim 1 wherein the coolant is water.

3 A heating system in which the cooling 120 water from an internal combustion engine is supplied to a heating radiator having a hot water inlet and a hot water outlet, and comprising a hot water supply circuit including a first passage connecting the cooling 125 water outlet of the engine and the hot water inlet of the heating radiator, and a second passage connecting the hot water outlet of the heating radiator and the cooling water 1,574,564 inlet of the engine, and means disposed in the hot water supply circuit for controlling the flow of hot water to the heating radiator, said means comprising a first tube disposed in the first passage, a second tube disposed in the second passage, a bypass passage between the first and second tube having a pressure responsive valve operable to admit a bypass flow of hot water from the first tube to the second tube when the hot water pressure exceeds a predetermined value, and a main valve disposed in one of the first and second tubes for controlling the supply of hot water to the heating radiator, the main valve member having an additional member for closing the bypass passage when the main valve is fully open.

4 A system according to claim 3 wherein the said means comprises a unitary casing integral with the first tube, second tube and bypass passage, the casing further having therein the main valve and a pressure responsive valve.

A system according to claim 4, wherein the main valve comprises a valve plate member having a plurality of different sized apertures and a shaft secured to the plate member.

6 A system according to claim 5, and comprising an additional valve member on a side surface of the valve plate.

7 A system according to claim 6, wherein the said means further comprises a lever having a pin on one end and a projection on the other end, the lever being pivotally supported in the casing whereby when the valve is fully closed the pin is pushed by the main valve thereby to lift the projection and close the pressure responsive valve irrespective of water pressure.

8 A system according to claim 3, wherein the valve plate has lands on a surface thereof for interrupting communication between the first passage and the bypass passage and a recess for communicating with the bypass 45 passage between the lands.

9 A hot water heating system in which the cooling water from an internal combustion engine is supplied to a heating radiator having a hot water inlet and a hot 50 water outlet, and comprising a first hot water passage having one end connected to the hot water inlet of the heating radiator, a second hot water passage having one end connected to the hot water outlet of the heating radiator, 55 and hot water flow control means having a first tube connecting the cooling water outlet of the engine with the other end of the first passage, a second tube connecting the other end of the second passage with the cooling 60 water inlet of the engine, a main valve member disposed in one of the first and second tubes for controlling the flow of hot water through the heating radiator and bypass means having a bypass passage and a pressure 65 responsive valve for bypassing the hot water in the first tube to the second tube when the pressure of the hot water exceeds a predetermined value, the main valve member having an additional valve member for closing the 70 bypass valve when the ‘main valve member fully opens.
A heating system in which the cooling water from an internal combustion engine supplied to a heating radiator and constructed 75 and arranged substantially as hereinbefore described with reference to and as illustrated in the accompanying drawings.
WITHERS & ROGERS, Chartered Patent Agents, 4, Dyer’s Buildings, Holborn, London, EC 1 N 2 JT.
Agents for the Applicants.
Printed for Her Majesty’s Stationery Office by Burgess & Son (Abingdon), Ltd -1980.
Published at The Patent Office, 25 Southampton Buildings, London, WC 2 A l AY, from which copies may be obtained.

GB4047/78A
1977-02-03
1978-02-01
Hot water heating system

Expired

GB1574564A
(en)

Applications Claiming Priority (3)

Application Number
Priority Date
Filing Date
Title

JP1115277A

JPS5919846B2
(en)

1977-02-03
1977-02-03

hot water heating system

JP7921377A

JPS5413649A
(en)

1977-07-01
1977-07-01
Hot water type heating device

JP8394877A

JPS5930566B2
(en)

1977-07-12
1977-07-12

hot water heating system

Publications (1)

Publication Number
Publication Date

GB1574564A
true

GB1574564A
(en)

1980-09-10

Family
ID=27279298
Family Applications (1)

Application Number
Title
Priority Date
Filing Date

GB4047/78A
Expired

GB1574564A
(en)

1977-02-03
1978-02-01
Hot water heating system

Country Status (3)

Country
Link

US
(1)

US4195777A
(en)

DE
(1)

DE2804722A1
(en)

GB
(1)

GB1574564A
(en)

Families Citing this family (26)

* Cited by examiner, † Cited by third party

Publication number
Priority date
Publication date
Assignee
Title

US4200124A
(en)

1978-02-21
1980-04-29
Eaton Corporation
Valve assembly

IT1160930B
(en)

1978-11-16
1987-03-11
Piemontese Radiatori

FOUR-WAY VALVE FOR VEHICLE HEATING SYSTEMS

DE2943064A1
(en)

1979-10-25
1981-05-14
Süddeutsche Kühlerfabrik Julius Fr. Behr GmbH & Co KG, 7000 Stuttgart

DEVICE FOR OPERATING A LIQUID CIRCUIT

FR2472707A1
(en)

1979-12-31
1981-07-03
Ferodo Sa

DEVICE FOR CONTROLLING THE LIQUID SUPPLY OF AN APPARATUS, IN PARTICULAR A HEAT EXCHANGER, ESPECIALLY FOR A MOTOR VEHICLE

FR2479397A1
(en)

1980-03-31
1981-10-02
Ferodo Sa

VALVE, IN PARTICULAR FOR ADJUSTING THE HEATING OF THE CABIN OF A MOTOR VEHICLE

US4373666A
(en)

1981-06-26
1983-02-15
General Motors Corporation
Engine cooling-passenger heating system

DE3269297D1
(en)

1982-04-06
1986-04-03
Ranco Inc
Engine coolant flow controlling valve

US4583499A
(en)

1983-11-03
1986-04-22
Hovey Stanton L
In-line thermostat apparatus for automotive vehicles

DE3416335A1
(en)

1984-05-03
1985-11-07
Wabco Westinghouse Fahrzeugbremsen GmbH, 3000 Hannover
Rotary slide valve

US4800925A
(en)

1987-08-05
1989-01-31
Ranco Incorporated Of Delaware
Automobile coolant flow control

IT214562Z2
(en)

1988-06-07
1990-05-09
Itw Fastex Italia Spa

FLOW DIVERTER FOR A VEHICLE HEATING SYSTEM

DE3935389A1
(en)

1989-10-24
1991-04-25
Wolf Woco & Co Franz J

MIXING VALVE

JPH0384213U
(en)

1989-12-18
1991-08-27

SE9002752D0
(en)

1990-08-28
1990-08-28
Bakelit Konstr Ab

AIR CONTROL SYSTEM FOR VEHICLES

WO1995003187A1
(en)

1993-07-21
1995-02-02
Firma J. Eberspächer
Dual-circuit vehicle heater

DE4324749A1
(en)

1993-07-23
1995-01-26
Freudenberg Carl Fa

Control valve

JP3322016B2
(en)

1994-08-29
2002-09-09
株式会社デンソー

Hot water heating system for automobiles

JP3596099B2
(en)

1995-07-10
2004-12-02
株式会社デンソー

Heating system

DE19732165B4
(en)

1996-07-30
2007-04-05
Denso Corp., Kariya

Hot water heater

US5950576A
(en)

1998-06-30
1999-09-14
Siemens Canada Limited
Proportional coolant valve

DE102004030993A1
(en)

2004-06-26
2006-01-12
Robert Bosch Gmbh
Heating and air conditioning installation for motor vehicle, has control valve controlling flow rate of water passing through heat exchanger, and inlet and outlet ducts thermally connected on part of their length, beyond exchanger

US20060196955A1
(en)

2005-03-01
2006-09-07
Bill Moxon
Domestic water pre-heating apparatus and method for a vehicle

US7584782B1
(en)

2006-08-28
2009-09-08
Hamilton Sundstrand Corporation
Valve defining modulated and unmodulated flow paths

US7770641B2
(en)

2007-12-18
2010-08-10
Chevron U.S.A. Inc.
Method for enhancing oil recovery with an improved oil recovery surfactant

FR2990898B1
(en)

2012-05-23
2015-02-20
Peugeot Citroen Automobiles Sa

HYDRAULIC LOOP OF THE COOLING CIRCUIT OF A VEHICLE

DE202019106394U1
(en)

2019-11-15
2021-02-16
Woco Industrietechnik Gmbh

Multi-way valve for adjusting a fluid flow

Family Cites Families (5)

* Cited by examiner, † Cited by third party

Publication number
Priority date
Publication date
Assignee
Title

US2028069A
(en)

1932-11-14
1936-01-14
Trico Products Corp
Motor vehicle heating and cooling system

US2490919A
(en)

1945-09-06
1949-12-13
Ranco Inc
Control apparatus

US3302696A
(en)

1965-02-08
1967-02-07
James R Rogers
Pressure response by-pass valve for heat exchange systems

US3966119A
(en)

1972-09-06
1976-06-29
Avm Corporation
Valve assembly with plural flow path control

US3889879A
(en)

1974-05-13
1975-06-17
Weatherhead Co
Internal combustion engine liquid cooling system

1978

1978-01-30
US
US05/873,479
patent/US4195777A/en
not_active
Expired – Lifetime

1978-02-01
GB
GB4047/78A
patent/GB1574564A/en
not_active
Expired

1978-02-03
DE
DE19782804722
patent/DE2804722A1/en
not_active
Withdrawn

Also Published As

Publication number
Publication date

DE2804722A1
(en)

1978-08-17

US4195777A
(en)

1980-04-01

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