GB2086502A - Brake block - Google Patents

Brake block Download PDF

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Publication number
GB2086502A
GB2086502A GB8132402A GB8132402A GB2086502A GB 2086502 A GB2086502 A GB 2086502A GB 8132402 A GB8132402 A GB 8132402A GB 8132402 A GB8132402 A GB 8132402A GB 2086502 A GB2086502 A GB 2086502A
Authority
GB
United Kingdom
Prior art keywords
layer
leather
elastomeric
brake block
article
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.)
Pending
Application number
GB8132402A
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.)
TI Raleigh Industries Ltd
Original Assignee
TI Raleigh Industries 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 TI Raleigh Industries Ltd filed Critical TI Raleigh Industries Ltd
Priority to GB8132402A priority Critical patent/GB2086502A/en
Publication of GB2086502A publication Critical patent/GB2086502A/en
Pending legal-status Critical Current

Links

Classifications

    • 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
    • F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
    • F16D65/00—Parts or details
    • F16D65/02—Braking members; Mounting thereof
    • F16D65/04—Bands, shoes or pads; Pivots or supporting members therefor
    • F16D65/092—Bands, shoes or pads; Pivots or supporting members therefor for axially-engaging brakes, e.g. disc brakes
    • 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
    • B29C70/78—Moulding material on one side only of the preformed part
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B25/00—Layered products comprising a layer of natural or synthetic rubber
    • B32B25/04—Layered products comprising a layer of natural or synthetic rubber comprising rubber as the main or only constituent of a layer, which is next to another layer of the same or of a different material
    • B32B25/08—Layered products comprising a layer of natural or synthetic rubber comprising rubber as the main or only constituent of a layer, which is next to another layer of the same or of a different material of synthetic resin
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B38/00—Ancillary operations in connection with laminating processes
    • B32B38/0012—Mechanical treatment, e.g. roughening, deforming, stretching
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B7/00—Layered products characterised by the relation between layers; Layered products characterised by the relative orientation of features between layers, or by the relative values of a measurable parameter between layers, i.e. products comprising layers having different physical, chemical or physicochemical properties; Layered products characterised by the interconnection of layers
    • B32B7/02—Physical, chemical or physicochemical properties
    • B32B7/022—Mechanical properties
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B9/00—Layered products comprising a layer of a particular substance not covered by groups B32B11/00 - B32B29/00
    • B32B9/04—Layered products comprising a layer of a particular substance not covered by groups B32B11/00 - B32B29/00 comprising such particular substance as the main or only constituent of a layer, which is next to another layer of the same or of a different material
    • B32B9/042—Layered products comprising a layer of a particular substance not covered by groups B32B11/00 - B32B29/00 comprising such particular substance as the main or only constituent of a layer, which is next to another layer of the same or of a different material of wood
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B9/00—Layered products comprising a layer of a particular substance not covered by groups B32B11/00 - B32B29/00
    • B32B9/04—Layered products comprising a layer of a particular substance not covered by groups B32B11/00 - B32B29/00 comprising such particular substance as the main or only constituent of a layer, which is next to another layer of the same or of a different material
    • B32B9/043—Layered products comprising a layer of a particular substance not covered by groups B32B11/00 - B32B29/00 comprising such particular substance as the main or only constituent of a layer, which is next to another layer of the same or of a different material of natural rubber or synthetic rubber
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B9/00—Layered products comprising a layer of a particular substance not covered by groups B32B11/00 - B32B29/00
    • B32B9/04—Layered products comprising a layer of a particular substance not covered by groups B32B11/00 - B32B29/00 comprising such particular substance as the main or only constituent of a layer, which is next to another layer of the same or of a different material
    • B32B9/045—Layered products comprising a layer of a particular substance not covered by groups B32B11/00 - B32B29/00 comprising such particular substance as the main or only constituent of a layer, which is next to another layer of the same or of a different material of synthetic resin
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B62—LAND VEHICLES FOR TRAVELLING OTHERWISE THAN ON RAILS
    • B62L—BRAKES SPECIALLY ADAPTED FOR CYCLES
    • B62L1/00—Brakes; Arrangements thereof
    • B62L1/005—Brakes; Arrangements thereof constructional features of brake elements, e.g. fastening of brake blocks in their holders
    • 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
    • F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
    • F16D69/00—Friction linings; Attachment thereof; Selection of coacting friction substances or surfaces
    • 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
    • F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
    • F16D69/00—Friction linings; Attachment thereof; Selection of coacting friction substances or surfaces
    • F16D69/02—Composition of linings ; Methods of manufacturing
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29K—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES B29B, B29C OR B29D, RELATING TO MOULDING MATERIALS OR TO MATERIALS FOR MOULDS, REINFORCEMENTS, FILLERS OR PREFORMED PARTS, e.g. INSERTS
    • B29K2021/00—Use of unspecified rubbers as moulding material
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29K—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES B29B, B29C OR B29D, RELATING TO MOULDING MATERIALS OR TO MATERIALS FOR MOULDS, REINFORCEMENTS, FILLERS OR PREFORMED PARTS, e.g. INSERTS
    • B29K2711/00—Use of natural products or their composites, not provided for in groups B29K2601/00 - B29K2709/00, for preformed parts, e.g. for inserts
    • B29K2711/08—Leather
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29L—INDEXING SCHEME ASSOCIATED WITH SUBCLASS B29C, RELATING TO PARTICULAR ARTICLES
    • B29L2031/00—Other particular articles
    • B29L2031/748—Machines or parts thereof not otherwise provided for
    • B29L2031/7482—Brakes
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B38/00—Ancillary operations in connection with laminating processes
    • B32B38/0012—Mechanical treatment, e.g. roughening, deforming, stretching
    • B32B2038/0016—Abrading
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2307/00—Properties of the layers or laminate
    • B32B2307/50—Properties of the layers or laminate having particular mechanical properties
    • B32B2307/51—Elastic
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2307/00—Properties of the layers or laminate
    • B32B2307/70—Other properties
    • B32B2307/744—Non-slip, anti-slip
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2317/00—Animal or vegetable based
    • B32B2317/08—Natural leather
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2475/00—Frictional elements
    • 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
    • F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
    • F16D69/00—Friction linings; Attachment thereof; Selection of coacting friction substances or surfaces
    • F16D2069/005—Friction linings; Attachment thereof; Selection of coacting friction substances or surfaces having a layered structure
    • 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
    • F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
    • F16D69/00—Friction linings; Attachment thereof; Selection of coacting friction substances or surfaces
    • F16D2069/005—Friction linings; Attachment thereof; Selection of coacting friction substances or surfaces having a layered structure
    • F16D2069/007—Friction linings; Attachment thereof; Selection of coacting friction substances or surfaces having a layered structure comprising a resilient layer

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Ceramic Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • Composite Materials (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Wood Science & Technology (AREA)
  • Treatment And Processing Of Natural Fur Or Leather (AREA)

Abstract

The brake block 10 which is suitable for use on cycles, in which the block is brought against the rim of the cycle wheel to produce a braking force, comprises a laminated construction having a facing or friction layer 12 of chrome tanned leather, an intermediate layer 13 of elastomeric material e.g. rubber and a base layer 11 (e.g. of nylon or metal) which is relatively hard in comparison with the elastomeric layer 13. Details of moulding techniques for forming the block are given. The block 10 may be secured in a retaining shoe 16 of pressed metal by means of a bolt 21. <IMAGE>

Description

SPECIFICATION Brake blocks This invention relates to the construction of brake blocks and in particular to brake blocks used on cycles, which are brought against the rim of the cycle wheel to produce a braking force.
According to one aspect of the present invention a brake block comprises a laminated construction having a facing or friction layer of chrome tanned leather, an intermediate layer of elastomeric material and a base layer made of material which is relatively hard in comparison with the intermediate layer.
According to a further aspect of the present invention a brake block assembly comprises a retaining shoe with means for securing the assembly to a brake mechanism and a brake block of laminated construction having; a facing or friction layer of chrome tanned leather; an intermediate layer of elastomeric material, at least a portion of which is located within the shoe and which is maintained under compression by the shoe; and a base layer which is located wholly within the shoe and is made of material which is relatively hard in comparison with the intermediate elastomeric layer.
The chrome tanned leather facing or friction layer used in the present invention should be at least 1.5 mm thick and preferably from 2 to 5 mm thick.
Ox-hide is particularly suitable for this purpose, but other chrome tanned hides of the required thickness may be used. The elastomeric material may be a natural or synthetic rubber composition. The layer of elastomer is compressed by the walls of the brake block retaining shoe. Suitable elastomers may have a hardness of up to 95 IRHD (International Rubber Hardness Degrees) but preferably the hardness of the interlayer should be similar to, or lower than that of the leather layer. The base layer of the brake ensures that the block is securely located within the retaining shoe. For this purpose it should have a hardness, at least of the order of twice that of the elastomeric layer. The base layer may be made of any suitable material, for example metal, or a plastics material such as nylon. This hard base layer also ensures that the elastomeric and leather layers remain flat in use.
The elastomeric layer may be secured to the relatively hard base layer and the leather friction layer, by any suitable means, for example, by bonding using an adhesive. Preferably, however, the elastomeric layer is secured to either or both the leather facing layer and the base layer, by direct moulding in contact with these layers. When the elastomeric layer is moulded in direct contact with the leather layer, special precautions must be taken to avoid degradation of the leather layer at-the moulding temperature. Adhesion between the elastomeric layer and the leather facing layer and/or the base layer, as a result of direct moulding of lhe elastomeric layer, may be enhanced by treating the surfaces of the leather layer and/or base layer with suitable bonding agents.The three layer laminate, from which the brake blocks according to the present invention are manufactured, may conveniently be formed as a large sheet, which is subsequently cut into individual brake blocks.
An embodiment of the invention is now described, by way of an example only, with reference to the accompanying drawings in which: Figure 1 shows an exploded isometric view of the brake assembly; and Figure 2 shows a cross-section of the brake assembly shown in Figure 1.
As illustrated in Figures 1 and 2, the brake block 10 comprises a rubber interlayer 13, which is moulded on one side to a base layer 11 made of a relatively hard plastics material, for example nylon, and on the opposite side to a layer of chrome tanned ox-hide 12.
The layers, which thus form the brake block, are preferably substantially parallel to one another, although the cross section of the rubber layer 13 may vary to accommodate irregularities in the surfaces of the other two layers 11 and 12.
In use the brake block 10, described above, is secured in a retaining shoe 16 which is conveniently formed from pressed metal. The retaining shoe 16 comprises a base plate 17, having a pair of upstanding end walls 18 and a pair of upstanding side walls 19. Base plate 17 is recessed at 20, the rectangular head of the bolt 21, which provides means for securing the brake block assembly to the brake mechanism, being located in this recess 20. The brake block 10 is positioned in the brake shoe 16, so that the base layer 11 is disposed wholly within the walls 18 and 19 of the brake shoe and the longitudinal walls 19 are inclined inwardly from the base 17, to compress the rubber interlayer 13 and thereby apply a clamping force to the base layer 11.The base layer 11 thus provides a means of securely anchoring the brake block 10 to the brake shoe 16, and also serve to keep the rubber and leather layers 13 and 12 substantially flat, while the elastomeric interlayer 13 minises stress concentrations and allows for natural expansion or contraction of the leather due to water saturation and stretching under load. The elastomeric interlayer also distorts under the clamping force produced by the brake mechanism, when the brake is applied and ensures that the whole surface of the leather is applied to the braking surface, under uniform load. Furthermore, if the layer of leather should be allowed to wear out before replacement or for some reason becomes detached from the elastomeric interlayer 13, the elastomeric interlayer will provide a friction material of conventional effectiveness.By direct moulding of the elastomeric interlayer 13 between the base and leather layers 11 and 12, variations in the thickness of these layers are automatically accommodated.
Brake blocks as illustrated in Figures 1 and 2, are produced as a large sheet, which is subsequently cut into individual brake blocks. A sheet of chrome tanned ox-hide leather of suitable thickness, i.e.
normally from 2-5 mm thick, is first prepared by removing the fine textured epidermal surface layer, by scraping or abrasion, until the coarse fibrous leather structure is exposed. The exposed surface 22 of the leather layer is then coated with a bonding agent, such as "CHEMLOK 220" which is commer cially available from Hughson Chemicals and comprises a solution of organic polymers and dispersed fillers in xylene perchloroethylene solvent systems.
The treated leather sheet is then heated at a temperature of between 105-110"C for about 3 hours, in a ventilated oven, to reduce the moisture content of the leather to less than 1%. The dried leather sheet is then immediately used in the next stage of the manufacturing process, or is stored in a moisture free container, so that it will not reabsorb moisture to above 3%, from the atmosphere.
The dried leather sheet is than placed against one of the faces of a suitable mould with the treated surface facing into the mould, and a premoulded layer of hard nylon is placed against the opposite surface of the mould. This layer of hard nylon may be pretreated with a suitable bonding agent, if required. A rubber composition is then introduced into the mould between the layers of leather and nylon using a conventional compression moulding technique. The rubber composition is cured by heating at 1 550C for 6 minutes. The composite nylon/rubber/leather sheet is removed from the mould and cut up into individual brake blocks of the required size. These brake blocks may then be mounted in retaining shoes as described above with reference to Figure 2, or may be sold separately as replacement brake blocks.
Alternative methods may be used to produce brake blocks according to the present invention, for example premoulded sheets of rigid plastics material and rubber and the layer of chrome tanned leather may be bonded together using suitable adhesives or alternatively the rubber layer may be moulded to the leather layer as described above, and the rigid plastics layer subsequently moulded or bonded to the rubber layer.
Various modifications may be made without departing from the invention, for example while in the embodiment described above the leather layer is chrome tanned ox-hide, any chrome tanned hide of the required thickness may be used. While it is convenient to dry the leather to a moisture content of 3% at most and preferably 1% or less, by heating, to between 100 and 120for 12 to 3 hours, other methods may be used.
In order to avoid degradation of the dried leather layer during curing of the elastomeric interlayer, the rubber composition used should be capable of being cured by heating uptoaboutl55'Cforupto 10 minutes. Rubber compositions which cure at higher temperatures or over a longer period may be used, but further precautions must be taken in orderto prevent degradation of the leather. For example, the part of the mould in which the leather is located may be water cooled and/or a layer of insulating material may be located between the layer of leather and the mould. The rubber compositions used in the present invention should not contain excess levels of oils or mould release agents, as these may penetrate the leather layer and affect the frictional characteristics of that layer.

Claims (25)

1. A brake block comprising a laminated construction having a facing or friction layer of chrome tanned leather, an intermediate layer of elastomeric material and a base layer made of material which is relatively hard in comparison with the intermediate layer.
2. A brake block assembly comprising a retaining shoe with means for securing the assembly to a brake mechanism and a brake block of laminated construction, said brake block having; a facing or friction layer of chrome tanned leather; an intermediate layer of elastomeric material, at least a portion of which is located within the shoe and which is maintained under compression by the shoe; and a base layer which is located wholly within the shoe and is made of material which is relatively hard in comparison with the intermediate elastomeric layer.
3. An article as claimed in Claim 1 or 2 in which the chrome tanned leather is ox-hide.
4. An article as claimed in any one of the preceding claims in which the leather layer is at least 1.5 mm thick.
5. An article as claimed in Claim 4 in which the leather layer is from 2 to 5 mm thick.
6. An article as claimed in any one of the preceding claims in which the elastomeric layer has a hardness of up to 95 IRHD.
7. An article as claimed in Claim 6 in which the elastomeric layer has a hardness which is similar to or lower than that of the leather layer.
8. An article as claimed in any one of the preceding claims in which the elastomeric layer is formed from a vulcanising rubber composition.
9. An article as claimed in any one of the preceding claims in which the base layer has a hardness of at least, the order of twice that of the elastomeric layer.
10. An article according to any one of the preceding claims in which the base layer is made of metal.
11. An article according to any one of claims 1 to 9 in which the base layer is made of a plastics material.
12. A method of producing a brake block as claimed in any one of the preceding claims, in which the base layerand/orthe leather facing layer are bonded to the elastomeric layer by means of an adhesive.
13. A method of producing the brake block as claimed in any one of Claims 1 to 11 in which the base layer and/or the leather layer are bonded to the elastomeric layer, by moulding the elastomeric layer in contact with these layers.
14. A method according to Claim 13 in which the layer of chrome tanned leather is dried to a moisture content of less than 3%, the dried leather is then positioned in a mould and the elastomer composition is introduced into the mould and is cured to form the elastomeric layer and to effect bonding between the layer of leather and the elastomeric layer.
15. A method according to Claim 14 in which the layer of chrome tanned leather is dried to a moisture content of less than 1% before being positioned in the mould.
16. A method according to Claim 14 or 15 in which the layer of chrome tanned leather is dried by heating at a temperature of between 100 and 120 C.
17. A method according to any one of Claims 14 to 16 in which the fine textured epidermal surface layer of the leather is removed before the leather is dried.
18. A method according to Claim 17 in which the epidermal surface layer of the leather is removed by scraping or abrasion.
19. A method according to any one of Claims 14 to 18 in which the surface of the layer of leather which is to be moulded to the elastomeric block is coated with a bonding agent, prior to drying.
20. A method according to any one of Claims 14 to 19 in which the elastomeric layer is moulded using a compression moulding technique.
21. A method according to any one of Claims 14 to 20 in which the elastomer composition is cured by heating to a temperature of up to 1550C for up to 10 minutes.
22. A method of producing a brake block as claimed in any one of the preceding claims, in which the elastomeric interlayer is bonded to the leather layer by the method claimed in any one of Claims 13 to 21 and a plastic base layer is subsequently moulded or bonded onto the opposite surface of the elastomeric interlayer.
23. A method of producing a brake block as claimed in any one of Claims 1 to 11, substantially as described herein, with reference to the accompanying drawings.
24. A brake block substantially described herein with reference to and shown in Figures 1 and 2 of the accompanying drawings.
25. A brake block assembly substantially as described herein with reference to, and as shown in, Figure 2 of the accompanying drawings.
GB8132402A 1980-11-05 1981-10-27 Brake block Pending GB2086502A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB8132402A GB2086502A (en) 1980-11-05 1981-10-27 Brake block

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
GB8035521 1980-11-05
GB8132402A GB2086502A (en) 1980-11-05 1981-10-27 Brake block

Publications (1)

Publication Number Publication Date
GB2086502A true GB2086502A (en) 1982-05-12

Family

ID=26277420

Family Applications (1)

Application Number Title Priority Date Filing Date
GB8132402A Pending GB2086502A (en) 1980-11-05 1981-10-27 Brake block

Country Status (1)

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GB (1) GB2086502A (en)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2125122A (en) * 1982-07-27 1984-02-29 Fibrax Ltd A brake pad for use in a disc brake
GB2261711A (en) * 1991-11-15 1993-05-26 Ferodo Ltd Brake element e.g a pad
GB2309057A (en) * 1996-01-11 1997-07-16 Ferodo Ltd A brake pad for railway braking applications
FR2833668A1 (en) * 2001-12-13 2003-06-20 Sime Stromag Sas Disc brake for industrial use has circular pads that rotate as they are applied
EP3377332A4 (en) * 2015-11-16 2018-12-05 I.G. Cardboard Technologies Ltd. Rim brake system and a tire

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2125122A (en) * 1982-07-27 1984-02-29 Fibrax Ltd A brake pad for use in a disc brake
GB2261711A (en) * 1991-11-15 1993-05-26 Ferodo Ltd Brake element e.g a pad
GB2261711B (en) * 1991-11-15 1995-09-20 Ferodo Ltd Brakes
US5586626A (en) * 1991-11-15 1996-12-24 Ferodo Limited And British Railways Board Brakes
GB2309057A (en) * 1996-01-11 1997-07-16 Ferodo Ltd A brake pad for railway braking applications
GB2309057B (en) * 1996-01-11 1999-08-18 Ferodo Ltd Improved brake elements
US6142263A (en) * 1996-01-11 2000-11-07 Ferodo Limited Multi-layer brake element with enhanced thermal insulation
FR2833668A1 (en) * 2001-12-13 2003-06-20 Sime Stromag Sas Disc brake for industrial use has circular pads that rotate as they are applied
EP3377332A4 (en) * 2015-11-16 2018-12-05 I.G. Cardboard Technologies Ltd. Rim brake system and a tire

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