GB2044161A - Windshield wiper - Google Patents

Windshield wiper Download PDF

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Publication number
GB2044161A
GB2044161A GB7909912A GB7909912A GB2044161A GB 2044161 A GB2044161 A GB 2044161A GB 7909912 A GB7909912 A GB 7909912A GB 7909912 A GB7909912 A GB 7909912A GB 2044161 A GB2044161 A GB 2044161A
Authority
GB
United Kingdom
Prior art keywords
carrier
blade
windshield
wiper
moulded
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.)
Granted
Application number
GB7909912A
Other versions
GB2044161B (en
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.)
CHIVERSTONE Ltd
Original Assignee
CHIVERSTONE 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 CHIVERSTONE Ltd filed Critical CHIVERSTONE Ltd
Priority to GB7909912A priority Critical patent/GB2044161B/en
Publication of GB2044161A publication Critical patent/GB2044161A/en
Application granted granted Critical
Publication of GB2044161B publication Critical patent/GB2044161B/en
Expired legal-status Critical Current

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
    • B60S1/38—Wiper blades
    • B60S1/3848—Flat-type wiper blade, i.e. without harness
    • B60S1/3874—Flat-type wiper blade, i.e. without harness with a reinforcing vertebra
    • B60S1/3882—C-shape section
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C70/00—Shaping composites, i.e. plastics material comprising reinforcements, fillers or preformed parts, e.g. inserts
    • B29C70/68—Shaping composites, i.e. plastics material comprising reinforcements, fillers or preformed parts, e.g. inserts by incorporating or moulding on preformed parts, e.g. inserts or layers, e.g. foam blocks
    • 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
    • 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
    • B60S2001/3812—Means of supporting or holding the squeegee or blade rubber
    • B60S2001/3817—Means of supporting or holding the squeegee or blade rubber chacterised by a backing strip to aid mounting of squeegee in support
    • B60S2001/3818—Means of supporting or holding the squeegee or blade rubber chacterised by a backing strip to aid mounting of squeegee in support the backing strip being a channel-like element, e.g. not continuous
    • 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
    • B60S2001/3827—Wiper blades characterised by the squeegee or blade rubber or wiping element
    • B60S2001/3836—Wiper blades characterised by the squeegee or blade rubber or wiping element characterised by cross-sectional shape

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • Composite Materials (AREA)
  • Injection Moulding Of Plastics Or The Like (AREA)

Abstract

In manufacturing a windshield wiper with a blade (3, 4) and a carrier (1) of generally flat rectangular cross-section with a single continuous longitudinal undercut channel to house a rectangular section (3) of the blade, the carrier (1) is moulded, preferably in polypropylene, in situ using the rectangular section (3) of the blade as a core. <IMAGE>

Description

SPECIFICATION Improved windshield wiper This invention relates to windshield wipers.
In United Kingdom Patent Specification 1,212,131, there is described and claimed a windshield wiper comprising an elastomeric blade mounted by a flange in an undercut channel extending along the concave side of a resilient and flexible carrier which is arcuate in its unloaded condition over at least part of its length, whereby when an intermediate zone of the carrier is compressed towards a windshield, substantially the whole length of the blade will be urged into conformity and wiping contact with the windshield.
In a preferred form of the invention in that specification the carrier is of a generally flat rectangular cross-section and has a single continuous undercut channel extending from end to end of the blade carrier. Such a configuration is difficult to mould in the plastics material, such as polypropylene, envisaged, since the continuous undercut channel is not easily released from the mould.
According to the present invention, there is provided a method of forming a windshield wiper having a carrier of generally flat rectangular cross section with a single continuous undercut channel extending between the ends of the blade carrier, in which the carrier is moulded in situ around a preformed wiper blade.
By this means the difficulties of moulding arising from the need to remove the carrier from its mould are overcome by using the blade itself as a core to form the undercut channel.
The invention also comprehends windshield wiperr formed according to the invention as set forth above.
The invention will be further described with reference to the accompanying drawings, in which: Figure 1 is a side elevation of a wiper in accordance with a preferred embodiment of the invention; and Figure 2 is a section on the line Il-Il of Figure 1.
The wiper illustrated herein is basically similar to that described in United Kingdom Patent Specification 1 212 The carrier comprises a strip 1 of polypropylene polycarbonate or similar resilient plastics material, which is arcuate in the unloaded state as illustrated in Figure 1, is of rectangular cross-section and has on the convex face an attach ment boss 2 for pivotal connection, by some suitable means (not shown), to a windshield wiper arm of conventional nature. The actual connection is not part of the present invention but for completeness it is mentioned that it may include a set screw for clamping, or alternatively some form of clip or clamp may be used.
The blade itself has a rectangular section portion 3 forming two longitudinal flanges, an intermediate neck 4 and a wiper portion 5 which can flex about the neck 4 and is also somewhat extensible so as to enable it to conform to the shape of a windshield as the carrier and blade oscillate.
The carrier is moulded around the rectangular sectional portion 3 and neck 4.
The rubber or elastomeric material of which the blade is formed must therefore be able to maintain its shape and physical and chemical properties during the moulding step.
As illustrated, the thickness of the carrier strip 1 is tapered away from the centre of the carrier to assist in allowing this to conform to the shape of the windshield.
Various modifications may be made within the scope of the invention.
1. A method of forming a windshield wiper having a carrier of generally flat rectangular crosssection with a single continuous undercut channel extending between the ends of the blade carrier, in which the carrier is moulded in situ around a preformed wiper blade.
2. A method as claimed in claim 1, in which the carrier is moulded of polypropylene.
3. A method as claimed in claim 1 or 2, in which the blade has a body portion of rectangular section connected by a neck to a wiping portion, the body portion being wider than the neck forming two longitudinal flanges around which the carrier is moulded.
4. A method of forming a windshield wiper substantially as hereinbefore described with reference to the accompanying drawing.
5. A windshield wiper having a blade and an in situ moulded carrier formed by a method as claimed in any of claims 1 to 4.
**WARNING** end of DESC field may overlap start of CLMS **.

Claims (5)

**WARNING** start of CLMS field may overlap end of DESC **. SPECIFICATION Improved windshield wiper This invention relates to windshield wipers. In United Kingdom Patent Specification 1,212,131, there is described and claimed a windshield wiper comprising an elastomeric blade mounted by a flange in an undercut channel extending along the concave side of a resilient and flexible carrier which is arcuate in its unloaded condition over at least part of its length, whereby when an intermediate zone of the carrier is compressed towards a windshield, substantially the whole length of the blade will be urged into conformity and wiping contact with the windshield. In a preferred form of the invention in that specification the carrier is of a generally flat rectangular cross-section and has a single continuous undercut channel extending from end to end of the blade carrier. Such a configuration is difficult to mould in the plastics material, such as polypropylene, envisaged, since the continuous undercut channel is not easily released from the mould. According to the present invention, there is provided a method of forming a windshield wiper having a carrier of generally flat rectangular cross section with a single continuous undercut channel extending between the ends of the blade carrier, in which the carrier is moulded in situ around a preformed wiper blade. By this means the difficulties of moulding arising from the need to remove the carrier from its mould are overcome by using the blade itself as a core to form the undercut channel. The invention also comprehends windshield wiperr formed according to the invention as set forth above. The invention will be further described with reference to the accompanying drawings, in which: Figure 1 is a side elevation of a wiper in accordance with a preferred embodiment of the invention; and Figure 2 is a section on the line Il-Il of Figure 1. The wiper illustrated herein is basically similar to that described in United Kingdom Patent Specification 1 212 The carrier comprises a strip 1 of polypropylene polycarbonate or similar resilient plastics material, which is arcuate in the unloaded state as illustrated in Figure 1, is of rectangular cross-section and has on the convex face an attach ment boss 2 for pivotal connection, by some suitable means (not shown), to a windshield wiper arm of conventional nature. The actual connection is not part of the present invention but for completeness it is mentioned that it may include a set screw for clamping, or alternatively some form of clip or clamp may be used. The blade itself has a rectangular section portion 3 forming two longitudinal flanges, an intermediate neck 4 and a wiper portion 5 which can flex about the neck 4 and is also somewhat extensible so as to enable it to conform to the shape of a windshield as the carrier and blade oscillate. The carrier is moulded around the rectangular sectional portion 3 and neck 4. The rubber or elastomeric material of which the blade is formed must therefore be able to maintain its shape and physical and chemical properties during the moulding step. As illustrated, the thickness of the carrier strip 1 is tapered away from the centre of the carrier to assist in allowing this to conform to the shape of the windshield. Various modifications may be made within the scope of the invention. CLAIMS
1. A method of forming a windshield wiper having a carrier of generally flat rectangular crosssection with a single continuous undercut channel extending between the ends of the blade carrier, in which the carrier is moulded in situ around a preformed wiper blade.
2. A method as claimed in claim 1, in which the carrier is moulded of polypropylene.
3. A method as claimed in claim 1 or 2, in which the blade has a body portion of rectangular section connected by a neck to a wiping portion, the body portion being wider than the neck forming two longitudinal flanges around which the carrier is moulded.
4. A method of forming a windshield wiper substantially as hereinbefore described with reference to the accompanying drawing.
5. A windshield wiper having a blade and an in situ moulded carrier formed by a method as claimed in any of claims 1 to 4.
GB7909912A 1979-03-21 1979-03-21 Windshield wiper Expired GB2044161B (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB7909912A GB2044161B (en) 1979-03-21 1979-03-21 Windshield wiper

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB7909912A GB2044161B (en) 1979-03-21 1979-03-21 Windshield wiper

Publications (2)

Publication Number Publication Date
GB2044161A true GB2044161A (en) 1980-10-15
GB2044161B GB2044161B (en) 1982-10-20

Family

ID=10504021

Family Applications (1)

Application Number Title Priority Date Filing Date
GB7909912A Expired GB2044161B (en) 1979-03-21 1979-03-21 Windshield wiper

Country Status (1)

Country Link
GB (1) GB2044161B (en)

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4342129A (en) * 1980-08-21 1982-08-03 Thompson William E Wiping inserts for windshield wipers, squeegees and the like
US4490880A (en) * 1983-03-14 1985-01-01 Thompson William E Windshield wiper
WO1988005004A1 (en) * 1986-12-24 1988-07-14 Swf Auto-Electric Gmbh Wiper blade, in particular for windshield wiper systems of motor vehicles
FR2730464A1 (en) * 1995-02-14 1996-08-14 Journee Paul Sa WIPER BLADE FOR A WIPER BLADE MOLDED IN AT LEAST TWO DIFFERENT RIGIDITY MATERIALS
WO2009000498A1 (en) * 2007-06-27 2008-12-31 Valeo Systemes D'essuyage Flat wiper blade
ES2386628A1 (en) * 2010-03-02 2012-08-24 Megatech Industries Orense, S.L. Procedure for the obtaining of a lamelunas piece and lamelunas piece so obtained. (Machine-translation by Google Translate, not legally binding)

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4342129A (en) * 1980-08-21 1982-08-03 Thompson William E Wiping inserts for windshield wipers, squeegees and the like
US4490880A (en) * 1983-03-14 1985-01-01 Thompson William E Windshield wiper
WO1988005004A1 (en) * 1986-12-24 1988-07-14 Swf Auto-Electric Gmbh Wiper blade, in particular for windshield wiper systems of motor vehicles
FR2730464A1 (en) * 1995-02-14 1996-08-14 Journee Paul Sa WIPER BLADE FOR A WIPER BLADE MOLDED IN AT LEAST TWO DIFFERENT RIGIDITY MATERIALS
EP0727337A1 (en) * 1995-02-14 1996-08-21 Paul Journee S.A. Windscreen wiper blade rubber moulded from at least two materials of differing rigidity
WO2009000498A1 (en) * 2007-06-27 2008-12-31 Valeo Systemes D'essuyage Flat wiper blade
ES2386628A1 (en) * 2010-03-02 2012-08-24 Megatech Industries Orense, S.L. Procedure for the obtaining of a lamelunas piece and lamelunas piece so obtained. (Machine-translation by Google Translate, not legally binding)

Also Published As

Publication number Publication date
GB2044161B (en) 1982-10-20

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PCNP Patent ceased through non-payment of renewal fee