WO2009116058A2 - Improved pantograph wiper mechanism - Google Patents

Improved pantograph wiper mechanism Download PDF

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Publication number
WO2009116058A2
WO2009116058A2 PCT/IN2008/000547 IN2008000547W WO2009116058A2 WO 2009116058 A2 WO2009116058 A2 WO 2009116058A2 IN 2008000547 W IN2008000547 W IN 2008000547W WO 2009116058 A2 WO2009116058 A2 WO 2009116058A2
Authority
WO
WIPO (PCT)
Prior art keywords
arm
wiper mechanism
spindle
body portion
blade
Prior art date
Application number
PCT/IN2008/000547
Other languages
French (fr)
Other versions
WO2009116058A3 (en
Inventor
Srinivasa Raju Gavarraju
Ashfaque Ahmed Ansari
Original Assignee
Tata Motors Limited
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 Tata Motors Limited filed Critical Tata Motors Limited
Publication of WO2009116058A2 publication Critical patent/WO2009116058A2/en
Publication of WO2009116058A3 publication Critical patent/WO2009116058A3/en

Links

Classifications

    • 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
    • B60S1/34—Wiper arms; Mountings therefor
    • B60S1/3402—Wiper arms; Mountings therefor with means for obtaining particular wiping patterns
    • B60S1/3406—Wiper arms; Mountings therefor with means for obtaining particular wiping patterns the wiper blades being rotated with respect to the wiper arms around an axis perpendicular to the wiped field
    • 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
    • B60S1/34—Wiper arms; Mountings therefor
    • B60S1/3402—Wiper arms; Mountings therefor with means for obtaining particular wiping patterns
    • B60S1/3409—Wiper arms; Mountings therefor with means for obtaining particular wiping patterns the wiper arms consisting of two or more articulated elements

Definitions

  • This invention relates to the wiping mechanism used in vehicles and more particularly to string type pantograph wiping mechanism.
  • Windshield wiping mechanism is generally used in vehicles to wipe the windshield glass to make it free from water, dirt and dust.
  • Conventional windshield wiper mechanism comprises of motor driven spindle, arm and blade. Wherein said arm is connected to the said spindle and blade, the rotary motion of the motor is converted to oscillatory motion of the blade through arm.
  • pantograph wiping mechanisms used in aircraft comprises of motor driven spindle, arm, link structure and blade. Wherein said arm is connected to the said spindle and blade, the rotary motion of the motor is converted to oscillatory motion of the blade through arm. Said link structure assist in achieving the pantograph wiping.
  • the main object of this invention is to provide an improved pantograph wiper mechanism, which will not affect the field of vision and contribute for good aesthetics.
  • Yet another object of this invention is to provide an improved pantograph wiper mechanism which is flexible and which can reach to the desired parking and up positions.
  • Yet another object of this invention is to provide an improved pantograph wiper mechanism, which is simple in construction and cost effective.
  • Improved pantograph wiper mechanism comprises of spindle, arm, flexible string, spring and blade, wherein said arm is having a head portion, a body portion and a hook portion, said head portion is provided with a provision to hold in a spindle, and is hinged to the said body portion, said body portion and hook portions are joined together through said spring, one end of said arm is connected to spindle and hooked end is connected to said blade, one end of said flexible string is connected to the said spindle at its periphery and other end is connected to the said hook portion of said arm.
  • Improved pantograph wiper mechanism in accordance with this invention basically comprises of spindle, arm, flexible string, spring and blade.
  • Said arm is having a head portion, a body portion and a hook portion, said head portion is provided with a provision to hold in a spindle, and is hinged to the said body portion.
  • Said body portion and hook portions are joined together by fastening through said spring.
  • One end of said arm is connected to spindle and hooked end is connected to said blade.
  • One end of said flexible string is connected to the said spindle at its periphery and other end is connected to the base portion of said hook portion of said arm.
  • Said flexible string is made to pass along the said body portion of said arm.
  • Said flexible string is connected to said spindle at left side of the centre line of the arm when it is in up position based on the requirement of desired wiping area.
  • Said hooking portion of said arm is provided with provision to hold the said blade.
  • Said arm is provided with coil spring to apply pressure on said blade, one end of said coil spring is connected to the said head portion and other end is connected to the said body portion.
  • Said body portion of said arm is provided with stopper to prevent the movement of the wiper blade beyond the desired wiping area.
  • the spindle receives oscillatory motion from motor, said oscillatory motion is transferred to the said wiper blade through said arm. Because of which the said blade moves between parking and up positions.
  • the said flexible string pulls the said hook portion of arm, which in turn tilts the said blade to the desired wiping area.
  • the said spring provided between body portion and hook portion of said arm assist in putting the said blade in original parking position.
  • FIG. 1 shows line diagram of the improved pantograph wiper mechanism in accordance with this invention.
  • FIG. 2 shows improved pantograph wiper mechanism fitted on vehicle.
  • Figure 3 shows the exploded view of the improved pantograph wiper mechanism.
  • Improved pantograph wiper mechanism in accordance with this invention basically comprises of spindle (8), arm (1), flexible string (6), spring (5) and blade (9).
  • Said arm is having a head portion (Ia), a body portion (Ib) and a hook portion (Ic), said head portion (Ia) is provided with a provision (2) to hold in a spindle (8), and is hinged to the said body portion (Ib).
  • Said body portion (Ib) and hook portions (Ic) are joined together by fastening (4) through said spring (5).
  • One end of said arm (1) is connected to spindle (8) and hooked end (Ic) is connected to said blade (9).
  • One end of said flexible string (6) is connected to the said spindle (8) at its periphery (15) and the other end is fixed in a slot (3) provided in the base portion of said hook portion (Ic) of said arm.
  • the body portion of the arm (Ib) has provision (7) for routing the flexible string (6) through the said body portion (Ib) of said arm.
  • Said flexible string (6) is connected to said spindle (8) at left side of the centre line of the arm when it is in up position based on the requirement of desired wiping area.
  • Said hooking portion of said arm (Ic) is provided with provision (10) to hold the said blade (9).
  • Said arm is provided with coil spring (11) to apply pressure on said blade (9), one end of said coil spring (11) is connected to the said head portion (Ia) and other end is connected to the said body portion (Ib).
  • Said body portion of said arm (1) is provided with stopper (12) to prevent the movement of the wiper blade beyond the desired wiping area.
  • Said body portion (Ib) of the said arm (1) has groove (13) to hold one end of the spring (5) and said hook portion (Ic) of the said arm (1) has groove (14) to hold other end of the spring (5).
  • the spindle (8) receives oscillatory motion from motor, said oscillatory motion is transferred to the said wiper blade (9) through said arm (1). Because of which the said blade (9) moves between parking position (A) and up position (B) on windshield (C). During movement of said blade (9) from parking to up positions, the said flexible string (6) pulls the said hook portion (Ic) of arm (1), which in turn tilts the said blade (9) by an angle ( ⁇ ) to the desired wiping area. During movement of said blade (9) from up position (B) to parking position (A) the said spring (5) provided between body portion (Ib) and hook portion (Ic) of said arm (1) assist in putting the said blade (9) in original parking position (A).

Abstract

This invention relates to the wiping mechanism used in vehicles and more particularly to string type pantograph wiping mechanism. Improved pantograph wiper mechanism in accordance with this invention basically comprises of spindle (8), arm (1 ), flexible string (6), spring (5) and blade (9), wherein said arm (1) is having a head portion (1a), a body portion (1 b) and a hook portion (1c), said head portion (1a) is provided with a provision (2) to hold in a spindle (8), and is hinged to the said body portion (1 b), said body portion (1 b) and hook portions (1c) are joined together through said spring (5), one end of said arm (1 ) is connected to spindle (8) and hooked end (1 c) is connected to said blade (9), one end of said flexible string (6) is connected to the said spindle (8) at its periphery and other end is connected to the said hook portion (1 c) of said arm (1).

Description

IMPROVED PANTOGRAPH WIPER MECHANISM
FIELD OF INVENTION
This invention relates to the wiping mechanism used in vehicles and more particularly to string type pantograph wiping mechanism.
BACKGROUND OF INVENTION
Windshield wiping mechanism is generally used in vehicles to wipe the windshield glass to make it free from water, dirt and dust. Conventional windshield wiper mechanism comprises of motor driven spindle, arm and blade. Wherein said arm is connected to the said spindle and blade, the rotary motion of the motor is converted to oscillatory motion of the blade through arm.
The drawback associated with said conventional windshield wiping mechanism is that, it is not possible to reach the desired parking and up positions with this type of mechanism.
US2336007 teaches pantograph wiping mechanisms used in aircraft, comprises of motor driven spindle, arm, link structure and blade. Wherein said arm is connected to the said spindle and blade, the rotary motion of the motor is converted to oscillatory motion of the blade through arm. Said link structure assist in achieving the pantograph wiping.
The drawback associated with said prior art is that, it requires additional link mechanism and the mounting of which obstructs the field of vision. In addition to this, this also affects aesthetic appeal. In order to overcome the above said drawbacks, this invention is devised. OBJECTS OF INVENTION
The main object of this invention is to provide an improved pantograph wiper mechanism, which will not affect the field of vision and contribute for good aesthetics.
Yet another object of this invention is to provide an improved pantograph wiper mechanism which is flexible and which can reach to the desired parking and up positions.
Yet another object of this invention is to provide an improved pantograph wiper mechanism, which is simple in construction and cost effective.
STATEMENT OF INVENTION
Improved pantograph wiper mechanism comprises of spindle, arm, flexible string, spring and blade, wherein said arm is having a head portion, a body portion and a hook portion, said head portion is provided with a provision to hold in a spindle, and is hinged to the said body portion, said body portion and hook portions are joined together through said spring, one end of said arm is connected to spindle and hooked end is connected to said blade, one end of said flexible string is connected to the said spindle at its periphery and other end is connected to the said hook portion of said arm.
BRIEF DESCRIPTION OF INVENTION
Improved pantograph wiper mechanism in accordance with this invention basically comprises of spindle, arm, flexible string, spring and blade. Said arm is having a head portion, a body portion and a hook portion, said head portion is provided with a provision to hold in a spindle, and is hinged to the said body portion. Said body portion and hook portions are joined together by fastening through said spring. One end of said arm is connected to spindle and hooked end is connected to said blade. One end of said flexible string is connected to the said spindle at its periphery and other end is connected to the base portion of said hook portion of said arm. Said flexible string is made to pass along the said body portion of said arm. Said flexible string is connected to said spindle at left side of the centre line of the arm when it is in up position based on the requirement of desired wiping area. Said hooking portion of said arm is provided with provision to hold the said blade. Said arm is provided with coil spring to apply pressure on said blade, one end of said coil spring is connected to the said head portion and other end is connected to the said body portion.
Said body portion of said arm is provided with stopper to prevent the movement of the wiper blade beyond the desired wiping area.
During operation the spindle receives oscillatory motion from motor, said oscillatory motion is transferred to the said wiper blade through said arm. Because of which the said blade moves between parking and up positions. During movement of said blade from parking to up position, the said flexible string pulls the said hook portion of arm, which in turn tilts the said blade to the desired wiping area. During movement of said blade from up to parking position the said spring provided between body portion and hook portion of said arm assist in putting the said blade in original parking position.
BRIEF DESCRIPTION OF DRAWINGS
Figure 1 shows line diagram of the improved pantograph wiper mechanism in accordance with this invention.
Figure 2 shows improved pantograph wiper mechanism fitted on vehicle. Figure 3 shows the exploded view of the improved pantograph wiper mechanism.
DETAILED DESCRIPTION OF INVENTION
Referring now to the drawings wherein the showings are for the purpose of illustrating a preferred embodiment of the invention only, and not for the purpose of limiting the same,
Referring to figure 1, figure 2 and figure 3,
Improved pantograph wiper mechanism in accordance with this invention basically comprises of spindle (8), arm (1), flexible string (6), spring (5) and blade (9). Said arm is having a head portion (Ia), a body portion (Ib) and a hook portion (Ic), said head portion (Ia) is provided with a provision (2) to hold in a spindle (8), and is hinged to the said body portion (Ib). Said body portion (Ib) and hook portions (Ic) are joined together by fastening (4) through said spring (5). One end of said arm (1) is connected to spindle (8) and hooked end (Ic) is connected to said blade (9). One end of said flexible string (6) is connected to the said spindle (8) at its periphery (15) and the other end is fixed in a slot (3) provided in the base portion of said hook portion (Ic) of said arm. The body portion of the arm (Ib) has provision (7) for routing the flexible string (6) through the said body portion (Ib) of said arm. Said flexible string (6) is connected to said spindle (8) at left side of the centre line of the arm when it is in up position based on the requirement of desired wiping area. Said hooking portion of said arm (Ic) is provided with provision (10) to hold the said blade (9). Said arm is provided with coil spring (11) to apply pressure on said blade (9), one end of said coil spring (11) is connected to the said head portion (Ia) and other end is connected to the said body portion (Ib). Said body portion of said arm (1) is provided with stopper (12) to prevent the movement of the wiper blade beyond the desired wiping area.
Said body portion (Ib) of the said arm (1) has groove (13) to hold one end of the spring (5) and said hook portion (Ic) of the said arm (1) has groove (14) to hold other end of the spring (5).
During operation the spindle (8) receives oscillatory motion from motor, said oscillatory motion is transferred to the said wiper blade (9) through said arm (1). Because of which the said blade (9) moves between parking position (A) and up position (B) on windshield (C). During movement of said blade (9) from parking to up positions, the said flexible string (6) pulls the said hook portion (Ic) of arm (1), which in turn tilts the said blade (9) by an angle (α) to the desired wiping area. During movement of said blade (9) from up position (B) to parking position (A) the said spring (5) provided between body portion (Ib) and hook portion (Ic) of said arm (1) assist in putting the said blade (9) in original parking position (A).
The foregoing description is a specific embodiment of the present invention. It should be appreciated that this embodiment is described for purpose of illustration only, and that numerous alterations and modifications may be practiced by those skilled in the art without departing from the spirit and scope of the invention. It is intended that all such modifications and alterations be included insofar as they come within the scope of the invention as claimed or the equivalents thereof.

Claims

1. Improved pantograph wiper mechanism comprising of spindle, arm, flexible string, spring and blade, wherein said arm is having a head portion, a body portion and a hook portion, said head portion is provided with a provision to hold in a spindle, and is hinged to the said body portion, said body portion and hook portions are joined together through said spring, one end of said arm is connected to spindle and hooked end is connected to said blade, one end of said flexible string is connected to the said spindle at its periphery and other end is connected to the said hook portion of said arm.
2. Improved pantograph wiper mechanism as claimed in claim 1 wherein said flexible string is connected to said spindle at left side of the centre line of the arm when it is in up position based on the requirement of desired wiping area.
3. Improved pantograph wiper mechanism as claimed in claims 1 and 2 wherein said body portion and hook portion are joined together by fastening through said spring.
4. Improved pantograph wiper mechanism as claimed in claims 1 to 3 wherein said flexible string is made to pass along the said body portion of said arm.
5. Improved pantograph wiper mechanism as claimed in claims 1 to 4 wherein said arm is further provided with coil spring to apply pressure on said blade, one end of said coil spring is connected to the said head portion and other end is connected to the said body portion.
6. Improved pantograph wiper mechanism as claimed in claims 1 to 5 wherein said body portion of said arm is further provided with stopper to prevent the movement of the wiper blade beyond the desired wiping area.
7. Improved pantograph wiper mechanism as claimed in claims 1 to 6 wherein one end of said flexible string is connected to the said spindle at its periphery and other end is connected to the base portion of said hook portion of said arm.
8. Improved pantograph wiper mechanism as claimed in claims 1 to 7 wherein said body portion and hook portions are joined together through a torsion spring.
9. Improved pantograph wiper mechanism as claimed in claims 1 to 8 wherein said body portion of the said arm has groove to hold one end of the spring. Said hook portion of the said arm also has groove to hold other end of the spring.
10. Improved pantograph wiper mechanism and process of manufacturing improved wiper mechanism substantially as herein described with reference to accompanying drawings.
PCT/IN2008/000547 2008-03-18 2008-08-29 Improved pantograph wiper mechanism WO2009116058A2 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
IN544MU2008 2008-03-18
IN544/MUM/2008 2008-03-18

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WO2009116058A2 true WO2009116058A2 (en) 2009-09-24
WO2009116058A3 WO2009116058A3 (en) 2010-04-22

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
ITPR20100028A1 (en) * 2010-04-16 2011-10-17 Escar S R L CLEANER DEVICE
CN103786689A (en) * 2012-09-27 2014-05-14 法雷奥系统公司 Connection device for wiper system with two actuator arms and wiper system including such device

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2820238A (en) * 1955-03-23 1958-01-21 Laura E Roth Wipers for windshields severely curved in part
US3660862A (en) * 1970-04-24 1972-05-09 Trico Products Corp Wiper arm
DE2513273A1 (en) * 1975-03-26 1976-10-07 Volkswagenwerk Ag Wide sweep vehicle windscreen wiper - has pivoting spring mounting for blade on wiper arm to clean bottom corner
EP1512592A1 (en) * 2003-09-08 2005-03-09 Robert Bosch Gmbh Wiper device having a control unit
US7114215B1 (en) * 2003-09-25 2006-10-03 Chih-Wei Chen Slidable windshield wiper for automobiles

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2820238A (en) * 1955-03-23 1958-01-21 Laura E Roth Wipers for windshields severely curved in part
US3660862A (en) * 1970-04-24 1972-05-09 Trico Products Corp Wiper arm
DE2513273A1 (en) * 1975-03-26 1976-10-07 Volkswagenwerk Ag Wide sweep vehicle windscreen wiper - has pivoting spring mounting for blade on wiper arm to clean bottom corner
EP1512592A1 (en) * 2003-09-08 2005-03-09 Robert Bosch Gmbh Wiper device having a control unit
US7114215B1 (en) * 2003-09-25 2006-10-03 Chih-Wei Chen Slidable windshield wiper for automobiles

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
ITPR20100028A1 (en) * 2010-04-16 2011-10-17 Escar S R L CLEANER DEVICE
EP2377732A1 (en) * 2010-04-16 2011-10-19 Escar S.r.l. Windscreen wiper device
CN103786689A (en) * 2012-09-27 2014-05-14 法雷奥系统公司 Connection device for wiper system with two actuator arms and wiper system including such device
CN103786689B (en) * 2012-09-27 2016-04-13 法雷奥系统公司 For there is the connecting device of the mop system of two actuating arms and comprising its system

Also Published As

Publication number Publication date
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