GB2261272A - Cap for a brake bleed screw - Google Patents
Cap for a brake bleed screw Download PDFInfo
- Publication number
- GB2261272A GB2261272A GB9123852A GB9123852A GB2261272A GB 2261272 A GB2261272 A GB 2261272A GB 9123852 A GB9123852 A GB 9123852A GB 9123852 A GB9123852 A GB 9123852A GB 2261272 A GB2261272 A GB 2261272A
- Authority
- GB
- United Kingdom
- Prior art keywords
- bleed screw
- cap
- brake
- screw cap
- tongue
- 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- Withdrawn
Links
- 210000002445 nipple Anatomy 0.000 claims abstract description 13
- 239000004020 conductor Substances 0.000 claims abstract description 12
- 239000013536 elastomeric material Substances 0.000 claims description 3
- 239000012530 fluid Substances 0.000 description 13
- POIUWJQBRNEFGX-XAMSXPGMSA-N cathelicidin Chemical compound C([C@@H](C(=O)N[C@@H](CCCNC(N)=N)C(=O)N[C@@H](CCCCN)C(=O)N[C@@H](CO)C(=O)N[C@@H](CCCCN)C(=O)N[C@@H](CCC(O)=O)C(=O)N[C@@H](CCCCN)C(=O)N[C@@H]([C@@H](C)CC)C(=O)NCC(=O)N[C@@H](CCCCN)C(=O)N[C@@H](CCC(O)=O)C(=O)N[C@@H](CC=1C=CC=CC=1)C(=O)N[C@@H](CCCCN)C(=O)N[C@@H](CCCNC(N)=N)C(=O)N[C@@H]([C@@H](C)CC)C(=O)N[C@@H](C(C)C)C(=O)N[C@@H](CCC(N)=O)C(=O)N[C@@H](CCCNC(N)=N)C(=O)N[C@@H]([C@@H](C)CC)C(=O)N[C@@H](CCCCN)C(=O)N[C@@H](CC(O)=O)C(=O)N[C@@H](CC=1C=CC=CC=1)C(=O)N[C@@H](CC(C)C)C(=O)N[C@@H](CCCNC(N)=N)C(=O)N[C@@H](CC(N)=O)C(=O)N[C@@H](CC(C)C)C(=O)N[C@@H](C(C)C)C(=O)N1[C@@H](CCC1)C(=O)N[C@@H](CCCNC(N)=N)C(=O)N[C@@H]([C@@H](C)O)C(=O)N[C@@H](CCC(O)=O)C(=O)N[C@@H](CO)C(O)=O)NC(=O)[C@H](CC=1C=CC=CC=1)NC(=O)[C@H](CC(O)=O)NC(=O)CNC(=O)[C@H](CC(C)C)NC(=O)[C@@H](N)CC(C)C)C1=CC=CC=C1 POIUWJQBRNEFGX-XAMSXPGMSA-N 0.000 description 9
- 239000000356 contaminant Substances 0.000 description 2
- 230000000740 bleeding effect Effects 0.000 description 1
- 239000000428 dust Substances 0.000 description 1
- 239000011499 joint compound Substances 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01M—LUBRICATING OF MACHINES OR ENGINES IN GENERAL; LUBRICATING INTERNAL COMBUSTION ENGINES; CRANKCASE VENTILATING
- F01M11/00—Component parts, details or accessories, not provided for in, or of interest apart from, groups F01M1/00 - F01M9/00
- F01M11/04—Filling or draining lubricant of or from machines or engines
- F01M11/0408—Sump drainage devices, e.g. valves, plugs
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60T—VEHICLE BRAKE CONTROL SYSTEMS OR PARTS THEREOF; BRAKE CONTROL SYSTEMS OR PARTS THEREOF, IN GENERAL; ARRANGEMENT OF BRAKING ELEMENTS ON VEHICLES IN GENERAL; PORTABLE DEVICES FOR PREVENTING UNWANTED MOVEMENT OF VEHICLES; VEHICLE MODIFICATIONS TO FACILITATE COOLING OF BRAKES
- B60T11/00—Transmitting braking action from initiating means to ultimate brake actuator without power assistance or drive or where such assistance or drive is irrelevant
- B60T11/10—Transmitting braking action from initiating means to ultimate brake actuator without power assistance or drive or where such assistance or drive is irrelevant transmitting by fluid means, e.g. hydraulic
- B60T11/28—Valves specially adapted therefor
- B60T11/30—Bleed valves for hydraulic brake systems
-
- 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
- F16B—DEVICES FOR FASTENING OR SECURING CONSTRUCTIONAL ELEMENTS OR MACHINE PARTS TOGETHER, e.g. NAILS, BOLTS, CIRCLIPS, CLAMPS, CLIPS OR WEDGES; JOINTS OR JOINTING
- F16B37/00—Nuts or like thread-engaging members
- F16B37/14—Cap nuts; Nut caps or bolt caps
-
- 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
- F16B—DEVICES FOR FASTENING OR SECURING CONSTRUCTIONAL ELEMENTS OR MACHINE PARTS TOGETHER, e.g. NAILS, BOLTS, CIRCLIPS, CLAMPS, CLIPS OR WEDGES; JOINTS OR JOINTING
- F16B2/00—Friction-grip releasable fastenings
- F16B2/02—Clamps, i.e. with gripping action effected by positive means other than the inherent resistance to deformation of the material of the fastening
- F16B2/06—Clamps, i.e. with gripping action effected by positive means other than the inherent resistance to deformation of the material of the fastening external, i.e. with contracting action
- F16B2/08—Clamps, i.e. with gripping action effected by positive means other than the inherent resistance to deformation of the material of the fastening external, i.e. with contracting action using bands
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Transportation (AREA)
- Braking Arrangements (AREA)
Abstract
A cap (10) for a bleed screw (30) of a brake of a motor vehicle comprises a flexible strip (12) having an opening (14) through which the bleed screw can pass to secure the cap (10) to the brake housing (34); an integral cap (18) for covering a nipple (42) of the bleed screw (30); and an integral tongue (22) for positioning adjacent the bleed screw, the tongue (22) and a portion (24) of the flexible strip (12) defining, in use, an aperture in which an insulated conductor wire (56) of a brake wear sensor can be secured. <IMAGE>
Description
BLEED SCREW CAP FOR A BRAKE
This invention relates to a bleed screw cap for a brake of a motor vehicle.
In a known arrangement, the brake (either a disc brake or a drum brake) of a motor vehicle comprises a fluid chamber within which a piston is slidably and sealably positioned. Hydraulic fluid within the fluid chamber can be pressurised to move the piston and actuate the brake. A bleed screw is normally screw threaded into an aperture in the brake which is fluidly connected with the fluid chamber.
The bleed screw has a nipple at its outer end and a throughbore from its outer end to its inner end. In a tightened position, the inner end of the bleed screw engages a shoulder in the aperture to close the throughbore and fluidly seal the aperture. In a loosened positioned, hydraulic fluid can flow (bleed) from the fluid chamber by way of the throughbore.
Bleeding of the hydraulic fluid is required on filling the brake system of the motor vehicle with hydraulic fluid and/or for the removal of air trapped in the brake system and/or on brake pad or brake shoe replacement. In order to substantially maintain the throughbore in a clean condition (and hence substantially prevent contaminants such as mud, dust and water reaching the hydraulic fluid in the brake system), an elastomeric bleed screw cap is normally positioned over the nipple. This known arrangement has the disadvantage that the bleed screw caps can easily become detached and lost.
It is also becoming common practice to attach a brake wear sensor to the brake to provide a warning of excessive wear of the friction lining material on the brake pads or brake shoes. The brake wear sensor includes an insulated conductor wire which can rub against the brake housing, thereby damaging the insulating covering on the wire.
It is an object of the present invention to overcome the above mentioned problems.
To this end, a bleed screw cap in accordance with the present invention comprises a flexible elongate body having an opening at one end through which the bleed screw can pass to secure the bleed screw cap to the brake; an integral cap at the other end of the flexible elongate body for covering a nipple of the bleed screw; and an integral tongue intermediate the opening and the cap and extending away from the flexible elongate body for positioning adjacent the bleed screw, the tongue and a portion of the flexible elongate body between the cap and the opening defining, in use, a substantially enclosed aperture through which an insulated conductor wire of a brake wear-sensor can pass to secure the insulated conductor wire relative to the brake.
When compared to the above mentioned prior art arrangement, the present invention provides a bleed screw cap which can be secured to the bleed screw and hence is not easily detached. Further, the present invention also provides securing means for the insulated conductor wire of a brake wear sensor to secure the insulated conductor wire relative to the brake and substantially prevent the insulated conductor wire rubbing on the brake housing.
Preferably, the tongue extends substantially perpendicularly away from the flexible elongate body when the bleed screw cap is not is use.
The tongue preferably comprises side walls and is substantially rigid.
Preferably, the bleed screw cap is moulded in one piece. In this case, the bleed screw cap is preferably moulded from elastomeric material.
The tongue is preferably positioned adjacent the opening. Alternatively, the tongue may comprise first and second sections spaced apart from one another and extending away from the flexible elongate body in the same direction, the first section being positioned adjacent the opening, the second section being positioned adjacent the cap, and the first and second sections being aligned and positioned adjacent the bleed screw when in use.
The present invention will now be described, by way of example, with reference to the accompanying drawings, in which:
Figure 1 is a top view of a bleed screw cap in accordance with the present invention;
Figure 2 is an end view of the bleed screw cap of Figure 1;
Figure 3 is a cross-sectional view on the line III-III of Figure 1;
Figure 4 is a side view, partly in cross-section, of the bleed screw cap of Figures 1 to 3 when secured in position by a bleed screw;
Figure 5 is a top view of a disc brake of a motor vehicle showing the bleed screw cap of Figures 1 to 3 when in use; and
Figure 6 is a cross-sectional view of a second embodiment of bleed screw cap in accordance with the present invention.
Referring to Figures 1 to 3, the bleed screw cap 10 comprises a flexible elongate body 12 having an opening 14 therethrough at one end 16. The opening 14 is large enough for the main body of a bleed screw to pass through, as detailed below with reference to Figure 4. A cap 18 is integral with the flexible elongate body 12 at the other end 20 thereof. The cap 18 has an internal shape corresponding to that of the nipple of the bleed screw, as detailed below, such that the cap can resiliently grip and cover the nipple. A tongue 22 integral with the flexible elongate body 12 extends away from a portion 24 of the flexible elongate body between the opening 14 and the cap 18 at substantially 90 degrees thereto. The tongue 22 is positioned adjacent the opening 14 and includes side walls 26 for increased rigidity when compared with the flexible elongate body 12.The bleed screw cap 10 is preferably moulded in one piece from elastomeric material, such as rubber.
Figure 4 shows the bleed screw cap 10 when attached to a typical bleed screw 30, but with the cap 18 detached from the bleed screw. In Figure 4, the bleed screw 30 is screw threaded into an aperture 32 in a brake housing 34 of a disc brake 36 (see
Figure 5). The aperture 32 provides a fluid connection with a fluid chamber (not shown) in the brake housing 34. The bleed screw 30 comprises a main body 38 having a portion 40 with a hexagonal cross-section (for adjustment of the bleed screw with a spanner or the like) and a nipple 42 at its outer end 44. The inner end 46 of the bleed screw 30 is angled to correspond with a shoulder 48 in the aperture 32. A throughbore 50 extends from the angled inner end 46 of the bleed screw 30 through the main body 38 to the.nipple 42.When the bleed screw 30 is in a tightened position (as shown in Figure 4), the inner end 46 engages the shoulder 48 to fluidly seal the throughbore 50 at the inner end. Loosening of the bleed screw 30 moves the inner end 46 away from the shoulder 48 allowing hydraulic fluid to bleed through the aperture 32 and the throughbore 50.
The bleed screw cap 10 is secured to the disc brake 36 by passing the main body 38 of the bleed screw 30 through the opening 14 before threading the bleed screw into the aperture 32. This arrangement retains the bleed screw cap 10 on the disc brake 36. The portion 24 of the flexible elongate body 12 can then be bent round and the cap 18 pushed onto the nipple 42. The internal shape of the cap 18 is such that it grips the nipple 42 and closes the throughbore 50 at the outer end 44 of the bleed screw 30 to substantially prevent ingress of contaminants into the throughbore, and hence into the aperture 32 and the fluid chamber of the disc brake 36.The tongue 22 lies alongside the main body 38 of the bleed screw 30 and (when the cap 18 grips the nipple 42) together with the portion 24 of the flexible elongate body 12 defines a substantially enclosed aperture 52 (see Figure 5) through which an insulated conductor wire 54 of a brake wear sensor 56 can pass. This arrangement secures the insulated conductor wire 54 in position relative to the disc brake 36, and substantially prevents the insulated conductor wire rubbing on the brake housing 34 and becoming damaged.
A modification of the above described embodiment of the present invention is shown in
Figure 6. In this alternative arrangement, like parts have been given the same reference numeral as above in regard to Figure 1 to 3. The bleed screw cap 60 of Figure 6 comprises a tongue having a first section 62 and a second section 64. The first and second sections 62,64 are positioned at either end of the portion 24 of the elongate flexible body 12 adjacent the opening 14 and cap 18 respectively, and extend away from the flexible elongate body in substantially the same direction. In use, when the cap 18 grips the nipple of a bleed screw, the free ends 66,68 of the first and second sections 62,64 respectively substantially abut one another (such that the first and second sections are substantially aligned) to form a substantially enclosed aperture with-the portion 24 of the flexible elongate body 12.
As a further alternative, the tongue may comprise a single section positioned adjacent the cap.
Whilst the present invention has been described above for use with a disc brake, the present invention can also be used with a drum brake or any other type of motor vehicle brake.
Claims (8)
1. A bleed screw cap for a bleed screw of a brake of a motor vehicle comprising a flexible elongate body having an opening at one end through which the bleed screw can pass to secure the bleed screw cap to the brake; an integral cap at the other end of the flexible elongate body for covering a nipple of the bleed screw; and an integral tongue intermediate the opening and the cap and extending away from the flexible elongate body for positioning adjacent the bleed screw, the tongue and a portion of the flexible elongate body between the cap and the opening defining, in use, a substantially enclosed aperture through which an insulated conductor wire of a brake wear sensor can pass to secure the insulated conductor wire relative to the brake.
2. A bleed screw cap as claimed in claim 1, wherein the tongue extends substantially perpendicularly away from the flexible elongate body when the bleed screw cap is not is use.
3. A bleed screw cap as claimed in claim 1 or claim 2, wherein the tongue comprises side walls and is substantially rigid.
4. A bleed screw cap as claimed in any one of claims 1 to 3, wherein the bleed screw cap is moulded in one piece.
5. A bleed screw cap as claimed in claim 4, wherein the bleed screw cap is moulded from elastomeric material.
6. A bleed screw cap as claimed in any one of claims 1 to 5, wherein the tongue is positioned adjacent the opening.
7. A bleed screw cap as claimed in any one of claims 1 to 5, wherein the tongue comprises first and second sections spaced apart from one another and extending away from the flexible elongate body in the same direction, the first section being positioned adjacent the opening, the second section being positioned adjacent the cap, the first and second sections being aligned and positioned adjacent the bleed screw when in use.
8. A bleed screw cap substantially as hereinbefore described with reference to, and as shown in, Figures 1 to 5, or Figure 6, of the accompanying drawings.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB9123852A GB2261272A (en) | 1991-11-09 | 1991-11-09 | Cap for a brake bleed screw |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB9123852A GB2261272A (en) | 1991-11-09 | 1991-11-09 | Cap for a brake bleed screw |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| GB9123852D0 GB9123852D0 (en) | 1992-01-02 |
| GB2261272A true GB2261272A (en) | 1993-05-12 |
Family
ID=10704370
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB9123852A Withdrawn GB2261272A (en) | 1991-11-09 | 1991-11-09 | Cap for a brake bleed screw |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB2261272A (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2002050459A1 (en) * | 2000-12-20 | 2002-06-27 | Freni Brembo S.P.A. | Cap for bleeding valve |
| WO2005071276A1 (en) * | 2004-01-20 | 2005-08-04 | Dnd Partnership Ltd | Protective covers |
| EP1934489A1 (en) * | 2005-09-23 | 2008-06-25 | Advanced Building Systems Pty Ltd. | Swagable washer locking plate |
| WO2014095085A1 (en) * | 2012-12-23 | 2014-06-26 | Gea Bock Gmbh | Fastening device |
| FR3011294A1 (en) * | 2013-10-02 | 2015-04-03 | Illinois Tool Works | INSERTING BODY IN A HOLE OF A SUPPORT |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB651075A (en) * | 1948-01-29 | 1951-03-14 | Metal Box Co Ltd | Improvements in or relating to dispensing containers for oil |
| GB2031858A (en) * | 1978-09-26 | 1980-04-30 | Lucas Industries Ltd | Sealing devices for bleed screws |
-
1991
- 1991-11-09 GB GB9123852A patent/GB2261272A/en not_active Withdrawn
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB651075A (en) * | 1948-01-29 | 1951-03-14 | Metal Box Co Ltd | Improvements in or relating to dispensing containers for oil |
| GB2031858A (en) * | 1978-09-26 | 1980-04-30 | Lucas Industries Ltd | Sealing devices for bleed screws |
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2002050459A1 (en) * | 2000-12-20 | 2002-06-27 | Freni Brembo S.P.A. | Cap for bleeding valve |
| WO2005071276A1 (en) * | 2004-01-20 | 2005-08-04 | Dnd Partnership Ltd | Protective covers |
| EP1934489A1 (en) * | 2005-09-23 | 2008-06-25 | Advanced Building Systems Pty Ltd. | Swagable washer locking plate |
| EP1934489A4 (en) * | 2005-09-23 | 2009-03-04 | Advanced Building Systems Pty | Swagable washer locking plate |
| US7931430B2 (en) | 2005-09-23 | 2011-04-26 | Advanced Building Systems Pty Ltd | Swagable washer locking plate |
| WO2014095085A1 (en) * | 2012-12-23 | 2014-06-26 | Gea Bock Gmbh | Fastening device |
| FR3011294A1 (en) * | 2013-10-02 | 2015-04-03 | Illinois Tool Works | INSERTING BODY IN A HOLE OF A SUPPORT |
| EP2857701A1 (en) * | 2013-10-02 | 2015-04-08 | Illinois Tool Works Inc. | Member which can be inserted in a hole of a mounting |
Also Published As
| Publication number | Publication date |
|---|---|
| GB9123852D0 (en) | 1992-01-02 |
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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) |