GB2350554A - Screen wash transfer tubing including a positive temperature coefficient of resistance plastics material - Google Patents

Screen wash transfer tubing including a positive temperature coefficient of resistance plastics material Download PDF

Info

Publication number
GB2350554A
GB2350554A GB0011850A GB0011850A GB2350554A GB 2350554 A GB2350554 A GB 2350554A GB 0011850 A GB0011850 A GB 0011850A GB 0011850 A GB0011850 A GB 0011850A GB 2350554 A GB2350554 A GB 2350554A
Authority
GB
United Kingdom
Prior art keywords
transfer tubing
plastics material
screen wash
temperature coefficient
positive temperature
Prior art date
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.)
Withdrawn
Application number
GB0011850A
Other versions
GB0011850D0 (en
Inventor
Peter Lumsden
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.)
MG Rover Group Ltd
Original Assignee
MG Rover Group 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.)
Filing date
Publication date
Application filed by MG Rover Group Ltd filed Critical MG Rover Group Ltd
Publication of GB0011850D0 publication Critical patent/GB0011850D0/en
Publication of GB2350554A publication Critical patent/GB2350554A/en
Withdrawn legal-status Critical Current

Links

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24H—FLUID HEATERS, e.g. WATER OR AIR HEATERS, HAVING HEAT-GENERATING MEANS, e.g. HEAT PUMPS, IN GENERAL
    • F24H1/00—Water heaters, e.g. boilers, continuous-flow heaters or water-storage heaters
    • F24H1/10—Continuous-flow heaters, i.e. heaters in which heat is generated only while the water is flowing, e.g. with direct contact of the water with the heating medium
    • F24H1/12—Continuous-flow heaters, i.e. heaters in which heat is generated only while the water is flowing, e.g. with direct contact of the water with the heating medium in which the water is kept separate from the heating medium
    • F24H1/121—Continuous-flow heaters, i.e. heaters in which heat is generated only while the water is flowing, e.g. with direct contact of the water with the heating medium in which the water is kept separate from the heating medium using electric energy supply
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60S—SERVICING, CLEANING, REPAIRING, SUPPORTING, LIFTING, OR MANOEUVRING OF VEHICLES, NOT OTHERWISE PROVIDED FOR
    • B60S1/00—Cleaning of vehicles
    • B60S1/02—Cleaning windscreens, windows or optical devices
    • B60S1/04—Wipers or the like, e.g. scrapers
    • B60S1/32—Wipers or the like, e.g. scrapers characterised by constructional features of wiper blade arms or blades
    • B60S1/38—Wiper blades
    • B60S1/3803—Wiper blades heated wiper blades
    • B60S1/3805—Wiper blades heated wiper blades electrically
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60S—SERVICING, CLEANING, REPAIRING, SUPPORTING, LIFTING, OR MANOEUVRING OF VEHICLES, NOT OTHERWISE PROVIDED FOR
    • B60S1/00—Cleaning of vehicles
    • B60S1/02—Cleaning windscreens, windows or optical devices
    • B60S1/46—Cleaning windscreens, windows or optical devices using liquid; Windscreen washers
    • B60S1/48—Liquid supply therefor
    • B60S1/487—Liquid supply therefor the liquid being heated
    • B60S1/488—Liquid supply therefor the liquid being heated electrically
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60S—SERVICING, CLEANING, REPAIRING, SUPPORTING, LIFTING, OR MANOEUVRING OF VEHICLES, NOT OTHERWISE PROVIDED FOR
    • B60S1/00—Cleaning of vehicles
    • B60S1/02—Cleaning windscreens, windows or optical devices
    • B60S1/46—Cleaning windscreens, windows or optical devices using liquid; Windscreen washers
    • B60S1/48—Liquid supply therefor
    • B60S1/52—Arrangement of nozzles; Liquid spreading means
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60S—SERVICING, CLEANING, REPAIRING, SUPPORTING, LIFTING, OR MANOEUVRING OF VEHICLES, NOT OTHERWISE PROVIDED FOR
    • B60S1/00—Cleaning of vehicles
    • B60S1/02—Cleaning windscreens, windows or optical devices
    • B60S1/46—Cleaning windscreens, windows or optical devices using liquid; Windscreen washers
    • B60S1/48—Liquid supply therefor
    • B60S1/52—Arrangement of nozzles; Liquid spreading means
    • B60S1/522—Arrangement of nozzles; Liquid spreading means moving liquid spreading means, e.g. arranged in wiper arms
    • B60S1/524—Arrangement of nozzles; Liquid spreading means moving liquid spreading means, e.g. arranged in wiper arms arranged in wiper blades
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
    • F16L53/00—Heating of pipes or pipe systems; Cooling of pipes or pipe systems
    • F16L53/30—Heating of pipes or pipe systems
    • F16L53/35—Ohmic-resistance heating
    • F16L53/38—Ohmic-resistance heating using elongate electric heating elements, e.g. wires or ribbons
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
    • B05B1/00—Nozzles, spray heads or other outlets, with or without auxiliary devices such as valves, heating means
    • B05B1/24—Nozzles, spray heads or other outlets, with or without auxiliary devices such as valves, heating means incorporating means for heating the liquid or other fluent material, e.g. electrically

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Water Supply & Treatment (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Cleaning By Liquid Or Steam (AREA)
  • Nozzles (AREA)
  • Rigid Pipes And Flexible Pipes (AREA)
  • Lubrication Details And Ventilation Of Internal Combustion Engines (AREA)

Abstract

Screen wash transfer tubing 50 comprises a tubular member 52 having an inner surface 54 defining a passageway through which wash fluid 60 may pass and an outer surface 56. A plastics material 58 having a positive temperature coefficient of resistance is located within the thickness defined between the inner surface 54 and the outer surface 56. In use, the plastics material 58 heats up when an electric current is passed across it thus preventing the wash fluid 60 from freezing within the tubing 50.

Description

2350554 Motor Vehicle Assembly The present invention relates to a motor
vehicle glazing washer assembly, and more particularly to one element making up such a motor vehicle glazing washer assembly.
A motor vehicle glazing washer assembly comprises a number of disparate elements including fluid transfer tubing for conveying washer fluid from a screen wash reservoir to a 5 spray nozzle.
However, in cold conditions the washer fluid may freeze within the washing system and it may not be possible to operate the washer assembly.
A number of solutions to prevent freezing of the washer fluid in the washing system have been suggested. These include that the fluid transfer tubing be mounted in close proximity to a heated component, such as the engine or exhaust component, to prevent freezing of the washer fluid within the fluid transfer tubing. It has also been suggested to heat the fluid transfer tubing by the use of a resistance wire.
It is an advantage of the present invention that it eliminates, or at least substantially reduces at least some of the problems identified above.
According to the present invention, screen wash transfer tubing comprises a tubular member having an inner surface defining a passageway through which fluid may pass and an outer surface, a thickness defined between the inner surface and the outer surface, in which the tubular member further comprises a plastics material having a positive temperature coefficient of resistance located within the thickness.
The invention will now be described, by way of example only, with reference to the accompanying drawings, in which:
Figure 1 shows a side view of screen wash transfer tubing according to a third aspect of the present invention; Figure 2 shows a section along line IT-H of Figure 1; Figure 3 shows a section along an alternative embodiment of transfer tubing according to the third aspect of the present invention.
Referring now to Figures 1 and 2, there can be seen screen wash transfer tubing 50 according to the present invention. The screen wash transfer tubing comprises an elongate tubular member. The transfer tubing may be of any desirable cross-section. The tubing 50 comprises a first tubular member 52 of a first flexible plastics material. The tubing has an inner surface 54 and an outer surface 56 defining a thickness therebetween. Within the thickness of the first tubular member 52 there is formed a second member 58.
In the embodiment shown in Figures 1 and 2, the first tubular member 52 is formed as a generally circular tube 62 having a passage through which screen wash 60 may flow and a rib 64 extending along the length of the transfer tubing. The second member 58 is located within the rib.
The second member 58 comprises a plastics material having a positive temperature coefficient of resistance. The flexible plastics material may comprise any suitable insulating plastics material. The flexible plastics material should be resistant to any additive contained within the screen wash passing through the tubing and also should be resistant to external environmental conditions, With reference to Figure 1, first and second electrical contacts 66,68 are introduced into the second member 58 through the outer surface 56 of the tubular member to place the second member 58 in an electrical circuit. The circuit may be operated by any convenient means, for example by an electrical control unit (not shown) which may operate the electrical circuit in response to a number of stimuli, for example a temperature sensor, a user operated switch operated from within a passenger cell of the motor vehicle to which the wiper blade assembly including the transfer tubing 50 of the present invention is fitted.
In use, when an electric current is passed across the second member, the second member will heat up. The second member will in turn heat the material of the tubular member to prevent freezing of any screen wash contained within the transfer tubing.
The screen wash transfer tubing may be formed by any suitable means. For example, the transfer tubing may be produced by coextruding the plastics of the tubular member 52 about the second member 58.
An alternative embodiment of the tubing is shown in Figure 3. In this embodiment, the transfer tubing 50' is generally circular in cross section and has an eccentrically located passageway 70 through which screen wash 60' may flow. The second member 58' is located within that portion of the transfer tubing 50' having greatest thickness.
The screen wash transfer tubing of the present invention has as an advantage that no metal components are contained within the screen wash tubing. As a result the screen wash tubing can more easily be recycled since there are no metallic parts to be removed from the screen wash tubing.

Claims (2)

1. Screen wash transfer tubing comprising a tubular member having an inner surface defining a passageway through which fluid may pass and an outer surface, a thickness defined between the inner surface and the outer surface, in which the tubular member further comprises a plastics material having a positive temperature coefficient of resistance located within the thickness.
2. Screen wash transfer tubing substantially as described herein with reference to and as illustrated in Figures 1, 2 and 3 of the accompanying drawings.
GB0011850A 1999-06-03 2000-05-18 Screen wash transfer tubing including a positive temperature coefficient of resistance plastics material Withdrawn GB2350554A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB9912874A GB2350552A (en) 1999-06-03 1999-06-03 Heated washer assembly for motor vehicle glazing

Publications (2)

Publication Number Publication Date
GB0011850D0 GB0011850D0 (en) 2000-07-05
GB2350554A true GB2350554A (en) 2000-12-06

Family

ID=10854647

Family Applications (4)

Application Number Title Priority Date Filing Date
GB9912874A Withdrawn GB2350552A (en) 1999-06-03 1999-06-03 Heated washer assembly for motor vehicle glazing
GB0011888A Withdrawn GB2350555A (en) 1999-06-03 2000-05-18 Screen wash reservoir including a positive temperature coefficient of resistance plastics material
GB0011850A Withdrawn GB2350554A (en) 1999-06-03 2000-05-18 Screen wash transfer tubing including a positive temperature coefficient of resistance plastics material
GB0011891A Withdrawn GB2350556A (en) 1999-06-03 2000-05-18 Spray nozzle with an insert of a positive temperature coefficient of resistance plastic

Family Applications Before (2)

Application Number Title Priority Date Filing Date
GB9912874A Withdrawn GB2350552A (en) 1999-06-03 1999-06-03 Heated washer assembly for motor vehicle glazing
GB0011888A Withdrawn GB2350555A (en) 1999-06-03 2000-05-18 Screen wash reservoir including a positive temperature coefficient of resistance plastics material

Family Applications After (1)

Application Number Title Priority Date Filing Date
GB0011891A Withdrawn GB2350556A (en) 1999-06-03 2000-05-18 Spray nozzle with an insert of a positive temperature coefficient of resistance plastic

Country Status (1)

Country Link
GB (4) GB2350552A (en)

Families Citing this family (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE10053686A1 (en) * 2000-10-28 2002-06-06 Bosch Gmbh Robert Wiper blade and method for heating a wiper blade
US6789744B2 (en) 2002-01-29 2004-09-14 Valeo Electrical Systems, Inc. Fluid heater with a variable mass flow path
US6782196B1 (en) 2003-02-28 2004-08-24 Valeo Electrical Systems, Inc. Fluid heater with freeze protection
DE102009057022B4 (en) * 2009-11-26 2021-01-14 Illinois Tool Works Inc. Device for guiding cleaning fluid
FR2984255B1 (en) * 2011-12-19 2014-09-12 Valeo Systemes Dessuyage PLASTIC AND ELECTRICALLY CONDUCTIVE COMPONENT OF A SYSTEM FOR THE SUPPLY AND / OR DISTRIBUTION OF ICE WASTE LIQUID OF A MOTOR VEHICLE
JP5781962B2 (en) * 2012-02-28 2015-09-24 アスモ株式会社 Washer nozzle
DE102013211870B4 (en) 2013-06-21 2022-03-24 Continental Automotive Gmbh Washer nozzle for a windshield washer system of a motor vehicle
KR101745204B1 (en) * 2015-12-11 2017-06-08 현대자동차주식회사 Wiper as one body with washer
DE102017206265A1 (en) * 2017-04-12 2018-10-18 Continental Automotive Gmbh Cleaning device for cleaning a transparent element of an optical or optoelectronic device

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2044601A (en) * 1979-03-22 1980-10-22 Smyth S Heated screenwash
GB2197419A (en) * 1986-09-25 1988-05-18 Raychem Gmbh Conduit with heater strip
US4798230A (en) * 1986-08-22 1989-01-17 Rehau Ag + Co. Heatable plastic hose
US5354965A (en) * 1990-08-21 1994-10-11 Gensonic, Inc. Window cleaning fluid heating system having timer-controlled heater and differential input circuit
GB2324585A (en) * 1997-04-23 1998-10-28 David Leslie Young Heated hoses

Family Cites Families (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3489884A (en) * 1966-12-28 1970-01-13 Texas Instruments Inc Heated windshield wiper and blade therefor
GB1318498A (en) * 1971-01-15 1973-05-31 Codeluppi L Cleaning windshields
US4212425A (en) * 1978-02-27 1980-07-15 Vdo Adolf Schindling Ag. Electrically heated windshield washer spray nozzle assembly
GB8321417D0 (en) * 1983-08-09 1983-09-07 M & W Exports Ltd Screen washer
DE3433091A1 (en) * 1984-09-08 1986-03-20 Audi AG, 8070 Ingolstadt SPRAY NOZZLE HEAD
GB2239823A (en) * 1990-01-16 1991-07-17 Pressac Ltd Electrically conductive nozzle assembly
GB2274410B (en) * 1993-01-25 1996-09-11 Valeo Wiper Systems Ltd Jet assembly for vehicle screen washer
US5749118A (en) * 1993-02-05 1998-05-12 Holland; Dewey T. Heated wiper blade
GB2310795A (en) * 1996-03-07 1997-09-10 Michael Stalaw Heated windshield wiper and washer systems

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2044601A (en) * 1979-03-22 1980-10-22 Smyth S Heated screenwash
US4798230A (en) * 1986-08-22 1989-01-17 Rehau Ag + Co. Heatable plastic hose
GB2197419A (en) * 1986-09-25 1988-05-18 Raychem Gmbh Conduit with heater strip
US5354965A (en) * 1990-08-21 1994-10-11 Gensonic, Inc. Window cleaning fluid heating system having timer-controlled heater and differential input circuit
GB2324585A (en) * 1997-04-23 1998-10-28 David Leslie Young Heated hoses

Also Published As

Publication number Publication date
GB2350555A (en) 2000-12-06
GB0011891D0 (en) 2000-07-05
GB2350556A (en) 2000-12-06
GB9912874D0 (en) 1999-08-04
GB0011850D0 (en) 2000-07-05
GB0011888D0 (en) 2000-07-05
GB2350552A (en) 2000-12-06

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Legal Events

Date Code Title Description
732E Amendments to the register in respect of changes of name or changes affecting rights (sect. 32/1977)
WAP Application withdrawn, taken to be withdrawn or refused ** after publication under section 16(1)