GB2385102A - A device for lengthening a brake operating linkage to prevent trailer overrun braking during reversing - Google Patents

A device for lengthening a brake operating linkage to prevent trailer overrun braking during reversing Download PDF

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Publication number
GB2385102A
GB2385102A GB0229889A GB0229889A GB2385102A GB 2385102 A GB2385102 A GB 2385102A GB 0229889 A GB0229889 A GB 0229889A GB 0229889 A GB0229889 A GB 0229889A GB 2385102 A GB2385102 A GB 2385102A
Authority
GB
United Kingdom
Prior art keywords
brake
bard
reverse
brakes
hydraulic
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
GB0229889A
Other versions
GB2385102B (en
GB0229889D0 (en
Inventor
Robert J Buckley
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
Priority claimed from GB0130806A external-priority patent/GB0130806D0/en
Application filed by Individual filed Critical Individual
Priority to GB0229889A priority Critical patent/GB2385102B/en
Publication of GB0229889D0 publication Critical patent/GB0229889D0/en
Priority to GB0319021A priority patent/GB2396673A/en
Priority to PCT/GB2003/003534 priority patent/WO2004056633A1/en
Priority to AU2003251056A priority patent/AU2003251056A1/en
Publication of GB2385102A publication Critical patent/GB2385102A/en
Application granted granted Critical
Publication of GB2385102B publication Critical patent/GB2385102B/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

Links

Classifications

    • 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
    • B60T7/00—Brake-action initiating means
    • B60T7/12—Brake-action initiating means for automatic initiation; for initiation not subject to will of driver or passenger
    • B60T7/20—Brake-action initiating means for automatic initiation; for initiation not subject to will of driver or passenger specially for trailers, e.g. in case of uncoupling of or overrunning by trailer
    • B60T7/203—Brake-action initiating means for automatic initiation; for initiation not subject to will of driver or passenger specially for trailers, e.g. in case of uncoupling of or overrunning by trailer with automatic brake release or reduction in case of reverse travel, e.g. by means of mechanisms mounted on the draw bar
    • 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
    • B60T11/107—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 overrun brakes with fluid means
    • 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
    • B60T13/00—Transmitting braking action from initiating means to ultimate brake actuator with power assistance or drive; Brake systems incorporating such transmitting means, e.g. air-pressure brake systems
    • B60T13/02—Transmitting braking action from initiating means to ultimate brake actuator with power assistance or drive; Brake systems incorporating such transmitting means, e.g. air-pressure brake systems with mechanical assistance or drive
    • B60T13/06—Transmitting braking action from initiating means to ultimate brake actuator with power assistance or drive; Brake systems incorporating such transmitting means, e.g. air-pressure brake systems with mechanical assistance or drive by inertia, e.g. flywheel
    • B60T13/08—Overrun brakes

Landscapes

  • Engineering & Computer Science (AREA)
  • Transportation (AREA)
  • Mechanical Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • Regulating Braking Force (AREA)

Abstract

To inhibit brake application of a mechanical or hydraulic trailer overrun braking system during reversing, a hydraulic device is provided which forms part of a brake operating linkage. In a normal position for forward motion, the device is biassed to a shortest length by a return spring E and is locked by a valve H which prevents oil flow, allowing operation of the overrun brake. When a towing vehicle engages a reverse gear, an electric solenoid or hydraulic brake valve H allows oil transfer to port G to lengthen the device, thus preventing overrun braking. Disengaging the reverse gear allows the spring E to return the piston C and piston rod B to the normal position. Reverse gear may be detected from a reversing light circuit or from reverse movement of a brake calliper. The device has male and female fittings J,K for connection to existing brake rods or cables, and also has a mechanical safety override. The device can be used with disc brakes.

Description

<Desc/Clms Page number 1>
BRAKE AUTO REVERSE DEVICE (BARD) DESCRIPTION There are many international road trailers fitted with axle braking systems which do not have auto-reverse facility as required by the current European Safety Regulations. For example, disc brakes which are more efficient, require less maintenance and are cheaper to maintain cannot be used in EU without modifications.
This invention is coupled into the operating linkage of such braking systems to provide this auto-reverse facility together with the advantages of improved brakes.
This device is an hydraulic auto-reverse actuator for mechanical or hydraulic brake systems. The actuator fits into the linkage between the overrun coupling and the brake compensator.
The device is a self-contained hydraulic ram which is kept in its shortest position by spring tension and hydraulic valve lock. The introduction of a valve in the flow allows normal operation of the brakes when not actuated.
When reverse gear is engaged on the towing vehicle either an electrical current applied to the valve solenoid from the reverse light circuit or reverse movement of the brake caliper opens the valve. The oil contained on one side of the ram flows to the opposite side, allowing the device to lengthen and consequently not apply the brakes.
Immediately the towing vehicle moves forward again, the piston is returned to the original position by the return spring within the cylinder. The oil flows back into the other side of the ram which is now again at its shortest length allowing the brakes to operate in the normal manner if the towing vehicle is braked.
The operating valve can be remotely mounted onto the chassis or assembled with the cylinder to the brake linkage.
<Desc/Clms Page number 2>
Part listing (see drawing attached) A. Ram Cylinder B. Piston Rod C. Piston D. Piston Seal E. Return Spring F. Port 1 G. Port 2 H. Electric solenoid OR hydraulic brake valve J. Male 10 mm fitting K. Female 10 mm fitting L. Check/Return Valve M. Hydraulic pipe from disc brake caliper OR wiring from vehicle plug When the BARD is in its normal running position (shortest), the valve (H) does not allow oil to transfer through the port 1 (F).
On application of the vehicle reverse gear the solenoid OR brake valve (H) is opened thus allowing oil to transfer through port 1 (F) via port 2 (G) to the rear of the piston (C). The piston rod (B) moves down the cylinder (A) thereby lengthening the cylinder and not applying the trailer brakes.
When reverse gear is disengaged and the valve (H) closes, the oil is allowed to flow back into the area as the piston is returned to its position by the return spring (E). The brakes will now operate normally The end fittings (J & K) of the cylinder (A) are 10 mm male and female fittings to suit commercially available brake operating rods and cables.

Claims (5)

  1. CLAIMS BRAKE AUTO REVERSE DEVICE (BARD) 1. BARD is a special hydraulic ram which enables disc brakes to be used on road trailers within current safety legislation.
  2. 2. BARD incorporates an electrically OR mechanically operated hydraulic valve which automatically prevents the brakes operating when reversing, whilst ensuring that they operate reliably when in forward motion.
  3. 3. BARD enables the safe and legal operation of non auto-reverse equipped brake systems on trailers.
  4. 4. BARD allows the inherent benefits of disc brake efficiency and simple maintenance to be employed on trailers in place of more complex and less reliable drum brakes.
  5. 5. BARD makes possible the employment of the self cleaning and non sticking characteristics of disc brakes after immersion in water within the Auto Reverse Safety regulations.
GB0229889A 2001-12-22 2002-12-23 Brake auto reverse device Expired - Fee Related GB2385102B (en)

Priority Applications (4)

Application Number Priority Date Filing Date Title
GB0229889A GB2385102B (en) 2001-12-22 2002-12-23 Brake auto reverse device
GB0319021A GB2396673A (en) 2002-12-23 2003-08-13 A device for extending or retracting a brake operating linkage to prevent trailer overrun braking during reversing
PCT/GB2003/003534 WO2004056633A1 (en) 2002-12-23 2003-08-13 Auto reserse facility in trailer vehicle to automatically over-run braking system
AU2003251056A AU2003251056A1 (en) 2002-12-23 2003-08-13 Auto reserse facility in trailer vehicle to automatically over-run braking system

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
GB0130806A GB0130806D0 (en) 2001-12-22 2001-12-22 Brake auto reverse device
GB0229889A GB2385102B (en) 2001-12-22 2002-12-23 Brake auto reverse device

Publications (3)

Publication Number Publication Date
GB0229889D0 GB0229889D0 (en) 2003-01-29
GB2385102A true GB2385102A (en) 2003-08-13
GB2385102B GB2385102B (en) 2004-06-02

Family

ID=27614780

Family Applications (1)

Application Number Title Priority Date Filing Date
GB0229889A Expired - Fee Related GB2385102B (en) 2001-12-22 2002-12-23 Brake auto reverse device

Country Status (1)

Country Link
GB (1) GB2385102B (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2396673A (en) * 2002-12-23 2004-06-30 Alan Murfin Brooks A device for extending or retracting a brake operating linkage to prevent trailer overrun braking during reversing
NO20161512A1 (en) * 2016-09-21 2017-05-02 Svela Solutions As Device that prevents activation of the trailer's inertia brake during reversing
US10507808B2 (en) 2017-09-11 2019-12-17 Svela Solutions As System for preventing a trailer's overrun brakes from being activated during reversing

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE202017105492U1 (en) 2017-09-11 2017-10-02 Svela Solutions As System for preventing the activation of a trailer overrun during reverse drive

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1226849A (en) * 1968-05-24 1971-03-31
DE2944678A1 (en) * 1979-11-06 1981-05-21 Josef Peitz Fahrzeugteile, 4790 Paderborn Overrun brake for tractor drawbar - has hydraulic cylinder for normal braking and to lift overrun on reversing

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2186929A (en) * 1985-08-12 1987-08-26 Rajinder Singh Mudher Over-run hydraulic braking system
GB9705607D0 (en) * 1997-03-18 1997-05-07 Strong Reginald J H Braking system for trailers

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1226849A (en) * 1968-05-24 1971-03-31
DE2944678A1 (en) * 1979-11-06 1981-05-21 Josef Peitz Fahrzeugteile, 4790 Paderborn Overrun brake for tractor drawbar - has hydraulic cylinder for normal braking and to lift overrun on reversing

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2396673A (en) * 2002-12-23 2004-06-30 Alan Murfin Brooks A device for extending or retracting a brake operating linkage to prevent trailer overrun braking during reversing
NO20161512A1 (en) * 2016-09-21 2017-05-02 Svela Solutions As Device that prevents activation of the trailer's inertia brake during reversing
NO340516B1 (en) * 2016-09-21 2017-05-02 Svela Solutions As Device that prevents the activation of the trailer's brake during backing
WO2018056832A1 (en) 2016-09-21 2018-03-29 Svela Solutions As A system preventing the activation of a trailer's overrun brakes during reversing
US10507808B2 (en) 2017-09-11 2019-12-17 Svela Solutions As System for preventing a trailer's overrun brakes from being activated during reversing

Also Published As

Publication number Publication date
GB2385102B (en) 2004-06-02
GB0229889D0 (en) 2003-01-29

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Legal Events

Date Code Title Description
PCNP Patent ceased through non-payment of renewal fee

Effective date: 20091223