GB2341903A - Single hydraulic piston bicycle/tricycle/tandem brake - Google Patents
Single hydraulic piston bicycle/tricycle/tandem brake Download PDFInfo
- Publication number
- GB2341903A GB2341903A GB9820668A GB9820668A GB2341903A GB 2341903 A GB2341903 A GB 2341903A GB 9820668 A GB9820668 A GB 9820668A GB 9820668 A GB9820668 A GB 9820668A GB 2341903 A GB2341903 A GB 2341903A
- Authority
- GB
- United Kingdom
- Prior art keywords
- braking system
- tricycle
- bicycle
- tandems
- tricycles
- 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- Withdrawn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
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
- F16D55/00—Brakes with substantially-radial braking surfaces pressed together in axial direction, e.g. disc brakes
- F16D55/02—Brakes with substantially-radial braking surfaces pressed together in axial direction, e.g. disc brakes with axially-movable discs or pads pressed against axially-located rotating members
- F16D55/22—Brakes with substantially-radial braking surfaces pressed together in axial direction, e.g. disc brakes with axially-movable discs or pads pressed against axially-located rotating members by clamping an axially-located rotating disc between movable braking members, e.g. movable brake discs or brake pads
- F16D55/224—Brakes with substantially-radial braking surfaces pressed together in axial direction, e.g. disc brakes with axially-movable discs or pads pressed against axially-located rotating members by clamping an axially-located rotating disc between movable braking members, e.g. movable brake discs or brake pads with a common actuating member for the braking members
- F16D55/2245—Brakes with substantially-radial braking surfaces pressed together in axial direction, e.g. disc brakes with axially-movable discs or pads pressed against axially-located rotating members by clamping an axially-located rotating disc between movable braking members, e.g. movable brake discs or brake pads with a common actuating member for the braking members in which the common actuating member acts on two levers carrying the braking members, e.g. tong-type brakes
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B62—LAND VEHICLES FOR TRAVELLING OTHERWISE THAN ON RAILS
- B62L—BRAKES SPECIALLY ADAPTED FOR CYCLES
- B62L3/00—Brake-actuating mechanisms; Arrangements thereof
- B62L3/02—Brake-actuating mechanisms; Arrangements thereof for control by a hand lever
- B62L3/023—Brake-actuating mechanisms; Arrangements thereof for control by a hand lever acting on fluid pressure 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
- F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
- F16D2121/00—Type of actuator operation force
- F16D2121/02—Fluid pressure
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- Braking Arrangements (AREA)
Abstract
A hydraulic braking system for a bicycle / tricycle / tandem, uses one hydraulic piston per wheel. Hydraulic Piston a pushes brake arms <B>c</B>, <B>c2</B> outwards on a horizontal plane, causing them to rotate around fulcrums <B>d</B>, <B>d2</B> to force brake pads <B>f</B>, <B>f2</B> onto the wheel rim <B>e</B>, thus providing friction which will stop the wheel from rotating. Brake arms are also disclosed (Figs.1.2 and 1.3) which enable the geometry of the system to be adjusted. Quick release mechanisms may be provided at pivot points <B>b</B>, <B>b2</B>, and the individual mounting plates <B>g</B>, <B>g2</B> may be replaced by a single U-shaped member (<B>j</B> Fig. 1.4).
Description
2341903 SINGLE HYDRAULIC PISTO BICYCLE / TRICYCLE / TANDEM BRAKE The
purpose of this invention is to provide braking on bicycles / tricycles tandems which utilise hand operated braking devices.
Many such systems exist today. The majority of these systems involve the pulling of a cable, by way of a hand operated brake lever, which in turn causes brake pads attached to various different styles of leverage mechanisms to clamp on to either side of the rim of the bicycle / tricycle / tandem wheel.
There are also variations on the cable pulling systems which operate drum style brakes positioned on the hub of the bicycle / tricycle / tandem wheel.
In addition to cable operated systems, there are also hydraulic systems. These come in two basic formats.
The first employs two hydraulic pistons to which the brake pads are directly mounted. The hydraulic pistons are positioned on either side of the bicycle / tricycle / tandem wheel rim. When the bicycle / tricycle / tandem rider pulls the brake lever, hydraulic brake fluid stored in a chamber within the brake lever, is forced down piping into the hydraulic pistons. This in turn forces the brake pads onto the bicycle / tricycle / tandem wheel rim. The set up described in this paragraph is in relation to one wheel, so must be duplicated should both the front and rear wheels of the bicycle / tricycle / tandem require braking.
The second employs a metal disk fixed to the centre of the bicycle / tricycle / tandem wheel, to which brake pads are positioned on either side. When the bicycle / tricycle / tandem rider pulls the brake lever, hydraulic brake fluid stored in a chamber within the brake lever, is forced down piping into hydraulic pistons. These pistons then force the brake pads onto the brake disc. The set up described in this paragraph is in relation to one wheel, so must be duplicated should both the front and rear wheels of the bicycle / tricycle / tandem require braking.
2 The objective of this invention is to provide a hydraulic breaking system for bicycles / tricycles / tandems which employs only one hydraulic piston per wheel and that can be adjusted independently of the hydraulic element of the system.
The objective of this invention is met by coupling a hydraulic piston to a leverage mechanism. As the hydraulic piston expands, two brake arms are forced apart and pivot around fixed points. Brake pads attached to the brake arms are forced on to the bicycle 1 tricycle / tandem wheel rim. The system can be adjusted by altering the geometry of the leverage mechanism.
3 The invention will now be described in detail and shall make references to the accompanying drawings.
Figure 1.0 shows the front view of the invention whilst attached to a bicycle / tricycle / tandem. The drawing represents the front forks of a bicycle / tricycle /tandem and a cross section of the wheel rim, spokes and tyre.
Figure 1. 1 shows the side view of the invention whilst attached to a bicycle tricycle / tandem Figures 1.2 & 1.3 show (front view) examples of how Brake Arms (c) & (c2) could be manufactured with variable mounting positions for Hydraulic Piston 1 Brake Arm Pivots (b) & (b2). It also shows an example of the variable mounting position of the Fulcrums (d) & (C) Figure 1.4 shows how the Brake Arm Mounting Plates (g) & (g2) may be manufactured as an inverted "U' shaped one piece unit G).
As displayed in fig 1.0, Brake Pads (f) & (C) are fixed to Brake Arms (c) & (c2) so that they are positioned next to the bicycle / tricycle / tandem wheel rim (e). Brake Arms (c) & (c2) are attached to the Brake Arm Mounting Plates (g) & (g2) [Or directly to 0)l at Fulcrums (d) & (C).
The Brake Arm Mounting Plates (g) & (g2) [Or G)] are fixed to the front and or rear bicycle / tricycle / tandem forks (i) at Brake Mounting Points (h) & (h2). The Hydraulic Piston (a) is connected to the Brake Arms (c) & (c2) at the Hydraulic Piston / Brake Arm Pivots (b) & (b2).
The Hydraulic Piston (a) is attached to and operated by hydraulic brake levers (Of the type which are already available and used on existing hydraulic braking systems).
When the brake lever is pulled by the bicycle / tricycle 1 tandem rider, the Hydraulic Piston (a) expands on a horizontal plain. This in turn causes Brake Arm (c) to rotate around Fulcrum (d) in an anticlockwise motion and Brake Arm (c2) to rotate around Fulcrum (d2) in a clockwise motion.
4 The rotation of Brake Arms (c) & (c2) around Fulcrums (d) & (d2) as described above, forces the Brake Pads (f) & (C) to make contact with the bicycle tricycle 1 tandem wheel rim (e).
The more pressure that is applied to the brake lever, the greater is the expansion of Hydraulic Piston (a). Thus Brake Arms (c) & (c2) rotate further around Fulcrums (d) & (C), which in turn forces Brake Pads (f) & (C) onto the bicycle / tricycle / tandem wheel rim (e) with greater pressure.
When the brake lever is released by the bicycle / tricycle / tandem rider, the Hydraulic Piston (a) will decompress, causing Brake Arm (c) to rotate around Fulcrum (d) in a clockwise motion and Brake Arm (c2) to rotate around Fulcrum (C) in an anticlockwise motion.
This action ultimately causes the Brake Pads (f) & (C) to release the bicycle tricycle / tandem wheel rim (e), thus allowing the wheel to rotate freely once more.
Fig 1. 1 shows the invention from a side profile.
To ensure that Brake Arms (c) & (c2) do not inadvertently rotate around Fulcrums (d) & (C) in either a clockwise or anticlockwise motion simultaneously, Guidance Springs (k) & (k2) as shown in fig 1. 1, will be fixed at one end to the Brake Arm Mounting Plates (g) & (g2) [Or j 1 at or around the position of Fulcrums (d) & (C).
The Other end of the Guidance Springs (k) & (k2) will be connected under tension to Brake Arms (c) & (c2) so that a clockwise force is applied to Brake Arms (c) and a anticlockwise force is applied to Brake Arm (c2).
Additionally, dependent upon the requirements of the Bicycle / Tricycle / Tandem rider, Brake Arm Mounting Plates (g) & (g2) may be manufactured as an inverted "U" shaped one piece unit G) [See fig 1.4] which would link Brake Mounting Points (h) & (h2) directly. This would provide additional strength and support to the bicycle / tricycle / tandem forks (i) and Brake Arms (c) & (c2).
The Brake Arms (c) & (c2) could be manufactured in various different formats so that various existing styles of brake pads could be mounted and adjusted as required.
The Hydraulic Piston / Brake Arm Pivots (b) & (b2) and the Fulcrums (d) & (d2) may employ ballrace bearings, plain bush bearings or no bearings at all, dependent upon the requirements of the Bicycle / Tricycle / Tandem rider.
Figures 1.2 & 1.3 show how the Brake Arms (c) & (c2) could be manufactured with variable mounting positions for the Hydraulic Piston / Brake Arm Pivots (b) & (b2). It also shows an example of the variable mounting position of the Fulcrums (d) & (d2). These various mounting positions would alter the geometry of the leverage mechanism and thus provide adjustment of the braking system independent of the actual hydraulic system.
So that the bicycle / tricycle / tandem rider can remove the wheel without the need for a tool or tools (Only where a quick release hub is fitted to the wheel) Hydraulic Piston / Brake Arm Pivots (b) and or (b2) may be secured with a type of quick release mechanism. This quick release mechanism could for example be in the form of a butterfly winged nut or a sprung pin.
Claims (9)
1) A hydraulic braking system for bicycles / tricycles / tandems which employs the use of one hydraulic piston per wheel.
2) A hydraulic braking system for bicycles / tricycles 1 tandems as claimed in Claim 1, wherein the hydraulic piston is coupled to a leverage mechanism to provide the motion required for the brake pads to come into contact with the bicycle / tricycle / tandem wheel rim.
3) A hydraulic braking system for bicycles / tricycles / tandems as claimed in Claim 1 and Claim 2 wherein the means is provided to adjust the braking system independent of the actual hydraulic system by way of altering the geometry of the leverage mechanism.
4) A hydraulic braking system for bicycles / tricycles / tandems as claimed in Claim 1 and Claim 2 and or Claim 3, wherein all or some pivots and fulcrums employ the use of plain bush bearings.
5) A hydraulic braking system for bicycles / tricycles / tandems as claimed in Claim 1 and Claim 2 and or Claim 3, wherein all or some pivots and fulcrums employ the use of ballrace bearings.
6) A hydraulic braking system for bicycles / tricycles / tandems as claimed in Claim 1 and Claim 2 and or Claim 3, wherein all or some pivots and fulcrums do not employ the use of any type of bearing.
7) A hydraulic braking system for bicycles / tricycles / tandems as claimed in all the above previous claims, wherein the means is provided for the bicycle / tricycle / tandem rider to release the braking system without the use of a tool or tools, to enable the wheel to be removed from the forks.
8) A hydraulic braking system for bicycles / tricycles / tandems as claimed in all the above previous claims, wherein a single inverted "U" shaped brake mount is employed to mount this hydraulic braking system to the bicycle tricycle / tandem.
9) A hydraulic braking system for bicycles / tricycles / tandems as described herein with reference to Figures 1.0, 1. 1, 1.2, 1.3 & 1.4 of the accompanying drawings.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB9820668A GB2341903A (en) | 1998-09-23 | 1998-09-23 | Single hydraulic piston bicycle/tricycle/tandem brake |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB9820668A GB2341903A (en) | 1998-09-23 | 1998-09-23 | Single hydraulic piston bicycle/tricycle/tandem brake |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| GB9820668D0 GB9820668D0 (en) | 1998-11-18 |
| GB2341903A true GB2341903A (en) | 2000-03-29 |
Family
ID=10839294
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB9820668A Withdrawn GB2341903A (en) | 1998-09-23 | 1998-09-23 | Single hydraulic piston bicycle/tricycle/tandem brake |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB2341903A (en) |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB1158933A (en) * | 1965-12-15 | 1969-07-23 | Elmer Eugene Freeland | Hydraulic cycle Brake. |
| GB1401152A (en) * | 1972-01-25 | 1975-07-16 | Dba Sa | Hydraulic control circuit |
| US3899056A (en) * | 1973-04-30 | 1975-08-12 | Carl L Doerr | Hydraulic bicycle brake assembly |
| FR2575991A1 (en) * | 1985-01-11 | 1986-07-18 | Leleu Jean | HYDRAULIC BRAKE FOR BICYCLES AND LIGHT VEHICLES |
| US4615415A (en) * | 1983-03-23 | 1986-10-07 | Mathauser William R | Hand operated hydraulic bicycle brake |
| EP0575720A1 (en) * | 1992-06-25 | 1993-12-29 | GUSTAV MAGENWIRTH GmbH & Co. | Hydraulic bicycle rim brake |
-
1998
- 1998-09-23 GB GB9820668A patent/GB2341903A/en not_active Withdrawn
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB1158933A (en) * | 1965-12-15 | 1969-07-23 | Elmer Eugene Freeland | Hydraulic cycle Brake. |
| GB1401152A (en) * | 1972-01-25 | 1975-07-16 | Dba Sa | Hydraulic control circuit |
| US3899056A (en) * | 1973-04-30 | 1975-08-12 | Carl L Doerr | Hydraulic bicycle brake assembly |
| US4615415A (en) * | 1983-03-23 | 1986-10-07 | Mathauser William R | Hand operated hydraulic bicycle brake |
| FR2575991A1 (en) * | 1985-01-11 | 1986-07-18 | Leleu Jean | HYDRAULIC BRAKE FOR BICYCLES AND LIGHT VEHICLES |
| EP0575720A1 (en) * | 1992-06-25 | 1993-12-29 | GUSTAV MAGENWIRTH GmbH & Co. | Hydraulic bicycle rim brake |
Also Published As
| Publication number | Publication date |
|---|---|
| GB9820668D0 (en) | 1998-11-18 |
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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) |