GB1451579A - Over-run brake device for a vehicular trailer - Google Patents

Over-run brake device for a vehicular trailer

Info

Publication number
GB1451579A
GB1451579A GB5306674A GB5306674A GB1451579A GB 1451579 A GB1451579 A GB 1451579A GB 5306674 A GB5306674 A GB 5306674A GB 5306674 A GB5306674 A GB 5306674A GB 1451579 A GB1451579 A GB 1451579A
Authority
GB
United Kingdom
Prior art keywords
shoe
brake
cam
shoes
over
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.)
Expired
Application number
GB5306674A
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.)
HAHN FAHRZEUGBAU GmbH
Original Assignee
HAHN FAHRZEUGBAU GmbH
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 HAHN FAHRZEUGBAU GmbH filed Critical HAHN FAHRZEUGBAU GmbH
Publication of GB1451579A publication Critical patent/GB1451579A/en
Expired 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
    • B60T7/206—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 by means of mechanisms mounted on trailer drum brakes

Landscapes

  • Engineering & Computer Science (AREA)
  • Transportation (AREA)
  • Mechanical Engineering (AREA)
  • Braking Arrangements (AREA)

Abstract

1451579 Trailer over-run brakes; internal shoe drum brakes HAHN FAHRZEUGBAU GmbH 9 Dec 1974 [28 Dec 1973] 53066/74 Heading F2E An over-run brake for trailers including an internal shoe drum brake 7, Fig. 1, operable by a hand-brake lever 3 or a draw rod 2 and member 4 through a floating expanded device 11, firm support for the primary shoe 8 being provided during forward travel 19 and the brake action being almost eliminated in the case of reverse travel 22, is characterized in that the ends of the shoes remote from the expander are supported on components including a pivot cam 25, Fig. 2, which in forward travel abuts a first fixed stop 28 as a result of the moments exterted on the shoes, and in reverse travel pivots to enable the secondary shoe 9 to move (circumferentially) a spring member 40 being inserted between the expander device 11 and the axis of the pivot cam; a second fixed stop 48 is provided by the pivot cam to enable a greater expansion of the shoes by the hand-brake lever 3. In operation, during over-run braking, the primary shoe 8, acting at point 39 of cam 25, Fig. 2, urges the latter clockwise about its axis of rotation 35, to abut first stop 28, because of the direction of travel 19, Fig. 1, of the drum 12, despite the greater lever arm 44 of the counterclockwise moment of the secondary shoe 9. Spring 40 is compressed. During reversing, on account of the opposite directon of rotation, 22, of drum 12, counterclockwise rotation by the secondary shoe 9, including the effect of the greater lever arm 44, prevails, and the cam 25 pivots to the position of Fig. 3. In this position lines 46, 47, of cam 25 constitute the second stop, and, the lower end of shoe 9 being nearer fixed housing 24 than in Fig. 2, the shoes are substantially ineffective. With the trailer stationary, hand-brake-lever operation produces equal forces at the shoes, so the greater leverage by shoe 9 pivots cam 25 to the Fig. 3 position again, after which the leverage provided by hand-brake-lever 3, which is greater than the leverage of draw rod 2 and member 4 in over-run braking, on transmission member 5, Fig. 1, serves to ensure maximum braking effect.
GB5306674A 1973-12-28 1974-12-09 Over-run brake device for a vehicular trailer Expired GB1451579A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE19732364822 DE2364822C3 (en) 1973-12-28 1973-12-28 Inner shoe brake for an overrun brake device for trailers

Publications (1)

Publication Number Publication Date
GB1451579A true GB1451579A (en) 1976-10-06

Family

ID=5902083

Family Applications (1)

Application Number Title Priority Date Filing Date
GB5306674A Expired GB1451579A (en) 1973-12-28 1974-12-09 Over-run brake device for a vehicular trailer

Country Status (6)

Country Link
AT (1) AT340791B (en)
BR (1) BR7410894D0 (en)
DE (1) DE2364822C3 (en)
FR (1) FR2256059B3 (en)
GB (1) GB1451579A (en)
IT (1) IT1027904B (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1054179A3 (en) * 1999-05-18 2003-03-26 Nisshinbo Industries Inc. A brake shoe anchor device for an internal drum brake device

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2814538C2 (en) * 1978-04-04 1982-06-03 Alois Kober KG, 8871 Kötz Inner shoe brake for trailers with overrun brakes
DE3143683C2 (en) * 1980-12-22 1986-03-20 VEB Fahrzeugwerk Olbernhau, DDR 9330 Olbernhau Support device for internal shoe brakes with automatic reversing for trailers with overrun brakes
DE3218701C1 (en) * 1982-05-18 1983-10-20 Eisenwerk Grümer GmbH & Co KG, 5276 Wiehl Internal-shoe drum brake for motor-vehicle trailers with overrun braking
DE8706527U1 (en) * 1986-09-26 1988-03-03 Alois Kober KG, 8871 Kötz Wheel brake for trailer
DE4208424C2 (en) * 1992-03-17 2000-12-21 Franz Schlegl Brake for overrun braked trailers for road vehicles

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE7222709U (en) * 1973-08-23 Bergische Achsenfabrik Kotz F & Soehne Drum brake in simplex design
DE7325794U (en) * 1974-07-18 Kotz F & Soehne Drum brake in simplex design for trailers
DE1000246B (en) * 1955-04-18 1957-01-03 Perrot Bremse G M B H Deutsche Self-amplifying inner shoe brake, especially for motor vehicles

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1054179A3 (en) * 1999-05-18 2003-03-26 Nisshinbo Industries Inc. A brake shoe anchor device for an internal drum brake device

Also Published As

Publication number Publication date
ATA988074A (en) 1977-04-15
FR2256059A1 (en) 1975-07-25
DE2364822B2 (en) 1978-07-13
AT340791B (en) 1978-01-10
DE2364822C3 (en) 1983-04-07
IT1027904B (en) 1978-12-20
FR2256059B3 (en) 1977-09-23
BR7410894D0 (en) 1975-09-16
DE2364822A1 (en) 1975-07-03

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Legal Events

Date Code Title Description
PS Patent sealed
732 Registration of transactions, instruments or events in the register (sect. 32/1977)
PCNP Patent ceased through non-payment of renewal fee

Effective date: 19921209