JPS6455434A - Duo-servo type drum brake - Google Patents

Duo-servo type drum brake

Info

Publication number
JPS6455434A
JPS6455434A JP21256487A JP21256487A JPS6455434A JP S6455434 A JPS6455434 A JP S6455434A JP 21256487 A JP21256487 A JP 21256487A JP 21256487 A JP21256487 A JP 21256487A JP S6455434 A JPS6455434 A JP S6455434A
Authority
JP
Japan
Prior art keywords
shoes
brake
switch
vehicle
turn
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
JP21256487A
Other languages
Japanese (ja)
Other versions
JP2706724B2 (en
Inventor
Hideyuki Morimoto
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.)
Nabco Ltd
Original Assignee
Nabco 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 Nabco Ltd filed Critical Nabco Ltd
Priority to JP62212564A priority Critical patent/JP2706724B2/en
Publication of JPS6455434A publication Critical patent/JPS6455434A/en
Application granted granted Critical
Publication of JP2706724B2 publication Critical patent/JP2706724B2/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Landscapes

  • Regulating Braking Force (AREA)
  • Braking Arrangements (AREA)

Abstract

PURPOSE:To start/stop a vehicle smoothly on an uphill road by providing a switch switchable corresponding to displacement of a pair of brake shoes based on change of functioning direction of brake reaction on the wheel cylinder. CONSTITUTION:When a vehicle stops on a hill, counter-Rd rotary force is produced in a drum friction engaging with a pair of shoes 3, 4 through function of gravity and the shoes 3, 4 function respectively as secondary and primary shoes to turn a switch 14 ON through a reaction transmission member 10 and an anchor pin 9 so as to turn a brake switch 26 ON thus switching a solenoid valve 23 to position B through a control circuit 25 and continuing brake function even upon release of brake pedal 16. When the vehicle is started, rotary force in Rd direction is produced in the drum and the shoes 3, 4 function respectively as primary and secondary shoes to turn the switch 14 OFF so as to switch the solenoid valve 3 to position A thus releasing brake. Consequently, the vehicle can be started/stopped smoothly on uphill roads.
JP62212564A 1987-08-26 1987-08-26 Duo servo type drum brake Expired - Lifetime JP2706724B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP62212564A JP2706724B2 (en) 1987-08-26 1987-08-26 Duo servo type drum brake

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP62212564A JP2706724B2 (en) 1987-08-26 1987-08-26 Duo servo type drum brake

Publications (2)

Publication Number Publication Date
JPS6455434A true JPS6455434A (en) 1989-03-02
JP2706724B2 JP2706724B2 (en) 1998-01-28

Family

ID=16624788

Family Applications (1)

Application Number Title Priority Date Filing Date
JP62212564A Expired - Lifetime JP2706724B2 (en) 1987-08-26 1987-08-26 Duo servo type drum brake

Country Status (1)

Country Link
JP (1) JP2706724B2 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6290036B1 (en) * 1998-05-12 2001-09-18 Akebono Brake Industry Co., Ltd. Drum brake device

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS4914869A (en) * 1972-06-03 1974-02-08
JPS61247550A (en) * 1985-04-25 1986-11-04 Fuji Heavy Ind Ltd Brake device

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS4914869A (en) * 1972-06-03 1974-02-08
JPS61247550A (en) * 1985-04-25 1986-11-04 Fuji Heavy Ind Ltd Brake device

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6290036B1 (en) * 1998-05-12 2001-09-18 Akebono Brake Industry Co., Ltd. Drum brake device

Also Published As

Publication number Publication date
JP2706724B2 (en) 1998-01-28

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