GB2216851A - Indicating wear in tyres - Google Patents

Indicating wear in tyres Download PDF

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Publication number
GB2216851A
GB2216851A GB8807141A GB8807141A GB2216851A GB 2216851 A GB2216851 A GB 2216851A GB 8807141 A GB8807141 A GB 8807141A GB 8807141 A GB8807141 A GB 8807141A GB 2216851 A GB2216851 A GB 2216851A
Authority
GB
United Kingdom
Prior art keywords
tyre
tread
layer
tyres
contrasting colour
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Withdrawn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
GB8807141A
Other versions
GB8807141D0 (en
Inventor
Frank Bromley
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.)
Individual
Original Assignee
Individual
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 Individual filed Critical Individual
Priority to GB8807141A priority Critical patent/GB2216851A/en
Publication of GB8807141D0 publication Critical patent/GB8807141D0/en
Publication of GB2216851A publication Critical patent/GB2216851A/en
Withdrawn legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60C—VEHICLE TYRES; TYRE INFLATION; TYRE CHANGING; CONNECTING VALVES TO INFLATABLE ELASTIC BODIES IN GENERAL; DEVICES OR ARRANGEMENTS RELATED TO TYRES
    • B60C11/00—Tyre tread bands; Tread patterns; Anti-skid inserts
    • B60C11/24—Wear-indicating arrangements

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Tires In General (AREA)

Abstract

A tyre tread includes a layer of material of contrasting colour, preferably red, which becomes exposed when the tread has worn down to a predetermined level, which may be at or close to the legal minimum tread depth. By using, in the conventional lamination of a tyre, a layer of rubber material incorporating a dye of contrasting colour, a complete lamination of the contrasting colour can be incorporated into the tyre.

Description

TYRES This invention relates to tyres.
Most pneumatic tyres are formed with a tread pattern for road-holding purposes, and in the U.K. and elsewhere, legal minima are laid down relating to the permissible depth of the tread pattern. Once the tyre is worn below this tread depth, the road-holding capability is impaired and, with pneumatic tyres, there is an increased danger of catastrophic tyre failure as the surface wears away and the wall thickness of it decreases.
It is an object of the present invention to provide a visible warning of tread wear to a predetermined depth.
In accordance with the invention, a tyre has a pattern of treads, and at least some of the treads, and preferably all of them, are provided with a layer of material of contrasting colour which becomes exposed when the tread has worn down to a predetermined level, which is basically that of incipient danger or at or close to the legal limit of minimum depth.
A pneumatic tyre is normally made by a process involving lamination of successive layers of soft rubber material which are adhered together. This process is known as "stitching", although the successive layers are not currently sewn together. Once the required thickness is achieved, a moulding process is adopted to form the required pattern and depth of tread of the tyre.
It will be appreciated that by using a layer of rubber material incorporating a dye of contrasting colour, a complete lamination of the contrasting colour can be readily incorporated into a tyre, and although the layer will be disturbed during the moulding process, it will be largely undisturbed in the full depth tread areas, which are the parts of the tyre to wear. There is thus close control of the position of the coloured layer , and therefore the positioning thereof within the thickness of the tyre.
The coloured layer is preferably red, which is the traditional warning colour, but other contrasting colours may be used.
Various modifications may be made within the scope of the invention. Thus, while the invention is primarily concerned with pneumatic tyres, it may also be applied to solid tyres with tread patterns.

Claims (3)

1. A tyre having a pattern of treads, wherein at least some of the treads, and preferably all of them, are provided with a layer of material of contrasting colour which becomes exposed when the tread has worn down to a predetermined level.
2. A tyre according to claim 1, which is a laminated pneumatic tyre having a complete lamination of the contrasting colour incorporated.
3. A tyre according to claim 1 or 2, wherein the coloured layer is red.
GB8807141A 1988-03-25 1988-03-25 Indicating wear in tyres Withdrawn GB2216851A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB8807141A GB2216851A (en) 1988-03-25 1988-03-25 Indicating wear in tyres

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB8807141A GB2216851A (en) 1988-03-25 1988-03-25 Indicating wear in tyres

Publications (2)

Publication Number Publication Date
GB8807141D0 GB8807141D0 (en) 1988-04-27
GB2216851A true GB2216851A (en) 1989-10-18

Family

ID=10634107

Family Applications (1)

Application Number Title Priority Date Filing Date
GB8807141A Withdrawn GB2216851A (en) 1988-03-25 1988-03-25 Indicating wear in tyres

Country Status (1)

Country Link
GB (1) GB2216851A (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2262489A (en) * 1991-12-17 1993-06-23 Wilfred James Victor Quibell Colour coded vehicle tyre for tread wear indication
GB2276130A (en) * 1993-03-02 1994-09-21 Derek Harold Hurst Tyre tread wear indication
GB2361219A (en) * 2000-04-14 2001-10-17 Nick Davies Motor vehicle tyre tread wear indicator
US7291237B2 (en) 2005-03-24 2007-11-06 O'brien John Michael Method of making tire having wear indicators

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1262669A (en) * 1969-03-17 1972-02-02 Eric Frederick Baxter Improvements in and relating to solid and pneumatic tyres
GB1400930A (en) * 1972-09-18 1975-07-16 Ppg Industries Inc Tyres
GB1557417A (en) * 1976-03-03 1979-12-12 Nissan Motor Pneumatic tyre with an indicator for indicating accumulated fatigue and internal damage of the tyre carcass
US4226274A (en) * 1978-09-18 1980-10-07 Awaya Herbert Y Rubber tire with wear indicator therein

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1262669A (en) * 1969-03-17 1972-02-02 Eric Frederick Baxter Improvements in and relating to solid and pneumatic tyres
GB1400930A (en) * 1972-09-18 1975-07-16 Ppg Industries Inc Tyres
GB1557417A (en) * 1976-03-03 1979-12-12 Nissan Motor Pneumatic tyre with an indicator for indicating accumulated fatigue and internal damage of the tyre carcass
US4226274A (en) * 1978-09-18 1980-10-07 Awaya Herbert Y Rubber tire with wear indicator therein

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2262489A (en) * 1991-12-17 1993-06-23 Wilfred James Victor Quibell Colour coded vehicle tyre for tread wear indication
GB2276130A (en) * 1993-03-02 1994-09-21 Derek Harold Hurst Tyre tread wear indication
GB2361219A (en) * 2000-04-14 2001-10-17 Nick Davies Motor vehicle tyre tread wear indicator
US7291237B2 (en) 2005-03-24 2007-11-06 O'brien John Michael Method of making tire having wear indicators

Also Published As

Publication number Publication date
GB8807141D0 (en) 1988-04-27

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Legal Events

Date Code Title Description
WAP Application withdrawn, taken to be withdrawn or refused ** after publication under section 16(1)