BR9705073A - Válvula de freio de dois estágios para comunicar pressão de fluido a um mecanismo de freio. - Google Patents

Válvula de freio de dois estágios para comunicar pressão de fluido a um mecanismo de freio.

Info

Publication number
BR9705073A
BR9705073A BR9705073-3A BR9705073A BR9705073A BR 9705073 A BR9705073 A BR 9705073A BR 9705073 A BR9705073 A BR 9705073A BR 9705073 A BR9705073 A BR 9705073A
Authority
BR
Brazil
Prior art keywords
high pressure
piston
brake
bleed
groove
Prior art date
Application number
BR9705073-3A
Other languages
English (en)
Inventor
Douglas Michael Durant
William Backes
Original Assignee
Deere & Co
Vickers Inc
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 Deere & Co, Vickers Inc filed Critical Deere & Co
Publication of BR9705073A publication Critical patent/BR9705073A/pt

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
    • 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
    • B60T13/10—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 fluid assistance, drive, or release
    • B60T13/12—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 fluid assistance, drive, or release the fluid being liquid
    • B60T13/16—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 fluid assistance, drive, or release the fluid being liquid using pumps directly, i.e. without interposition of accumulators or reservoirs
    • B60T13/161—Systems with master cylinder
    • B60T13/165—Master cylinder integrated or hydraulically coupled with booster
    • 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
    • B60T11/16—Master control, e.g. master cylinders
    • B60T11/224—Master control, e.g. master cylinders with pressure-varying means, e.g. with two stage operation provided by use of different piston diameters including continuous variation from one diameter to another

Landscapes

  • Engineering & Computer Science (AREA)
  • Transportation (AREA)
  • Mechanical Engineering (AREA)
  • Valves And Accessory Devices For Braking Systems (AREA)
  • Braking Arrangements (AREA)
  • Safety Valves (AREA)

Abstract

"VáLVULA DE FREIO DE DOIS ESTáGIOS PARA COMUNICAR PRESSãO DE FLUIDO A UM MECANISMO DE FREIO". Uma válvula de freio de dois estágios fornece pressão de fluido a um mecanismo de freio. A válvula de freio possui uma entrada para receber fluido de freio pressurizado a partir de uma bomba, uma porta de reservatório, um furo escalonado e uma peça de pistão escalonado, que compreende um pistão de enchimento prévio, de diâmetro maior, e um pistão de alta pressão, de diâmetro menor. O furo escalonado e o pistão escalonado formam uma câmara de enchimento prévio de alto volume e uma câmara de alta pressão. O pistão de alta pressão possui uma ranhura dosadora que controla a comunicação entre a entrada e o mecanismo de freio. Um orifício de sangria é formado no pistão de alta pressão e liga a câmara de alta pressão a uma superfície externa do pistão de alta pressão. O orifício de sangria inclui uma ranhura de sangria anular formada numa superfície externa do pistão de alta pressão e uma passagem radial que se estende a partir da ranhura de sangria até o interior do pistão de alta pressão. A ranhura de sangria é colocada de modo que o orifício de sangria fica aberto para a porta de reservatório através da câmara de enchimento prévio durante o movimento inicial de pistão, e fica fechado quando o pistão de alta pressão se move de uma distância predeterminada além da posição na qual a ranhura dosadora é primeiro ligada à entrada.
BR9705073-3A 1996-10-17 1997-10-17 Válvula de freio de dois estágios para comunicar pressão de fluido a um mecanismo de freio. BR9705073A (pt)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US08/733,229 US5778672A (en) 1996-10-17 1996-10-17 Brake valve

Publications (1)

Publication Number Publication Date
BR9705073A true BR9705073A (pt) 1999-09-14

Family

ID=24946752

Family Applications (1)

Application Number Title Priority Date Filing Date
BR9705073-3A BR9705073A (pt) 1996-10-17 1997-10-17 Válvula de freio de dois estágios para comunicar pressão de fluido a um mecanismo de freio.

Country Status (9)

Country Link
US (1) US5778672A (pt)
EP (1) EP0836974B1 (pt)
JP (1) JPH10138912A (pt)
AR (1) AR010248A1 (pt)
AU (1) AU713631B2 (pt)
BR (1) BR9705073A (pt)
CA (1) CA2206902C (pt)
DE (1) DE59706538D1 (pt)
ES (1) ES2170909T3 (pt)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6217128B1 (en) 1999-02-12 2001-04-17 Mico, Inc. Dual brake valve for a steering assist system
KR100429368B1 (ko) * 2001-11-16 2004-04-29 대우종합기계 주식회사 브레이크 밸브
GB0321389D0 (en) * 2003-09-12 2003-10-15 Meritor Heavy Vehicle Braking Master cylinder
CN102229336B (zh) * 2011-04-25 2012-12-26 周旭斌 刹车继动阀调节器

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3972191A (en) * 1975-08-11 1976-08-03 The Bendix Corporation Balanced servomotor valve
US4738109A (en) 1986-11-04 1988-04-19 Deere & Company Two stage brake control valve
DE4130832C1 (pt) * 1991-09-17 1993-05-13 Deere & Co., Moline, Ill., Us, Niederlassung Deere & Co. European Office, 6800 Mannheim, De
DE4132245C2 (de) * 1991-09-27 1994-03-10 Deere & Co Zweistufiges Ventil
US5400595A (en) * 1994-02-25 1995-03-28 Deere & Company Brake valve with prefill chamber unloading
US5394701A (en) * 1994-02-25 1995-03-07 Deere & Company Brake valve with prefill chamber unloading valve

Also Published As

Publication number Publication date
CA2206902A1 (en) 1998-04-17
ES2170909T3 (es) 2002-08-16
AU3920797A (en) 1998-04-23
EP0836974B1 (de) 2002-03-06
JPH10138912A (ja) 1998-05-26
EP0836974A2 (de) 1998-04-22
CA2206902C (en) 2000-02-22
EP0836974A3 (de) 1999-02-24
AU713631B2 (en) 1999-12-09
DE59706538D1 (de) 2002-04-11
AR010248A1 (es) 2000-06-07
US5778672A (en) 1998-07-14

Similar Documents

Publication Publication Date Title
US3088285A (en) Device for varying hydraulic pressure
JPS595468B2 (ja) ユアツシキパワ−ブレ−キソウチ
KR910004381A (ko) 서스펜션용 이중 작동 체크 밸브
BR9705073A (pt) Válvula de freio de dois estágios para comunicar pressão de fluido a um mecanismo de freio.
US4963692A (en) Brake control valve
JPH03109164A (ja) 複式親シリンダ
EP0280522A3 (en) Actuator with built-in pilot valve
CA1072607A (en) Hydraulic brake booster having independent reserve systems
ES403994A1 (es) Perfeccionamientos en cilindros maestros dobles.
JPH0366185B2 (pt)
JP2522487B2 (ja) 液圧倍力装置
JPS5989833A (ja) 液圧作動クラツチの防振装置
BR8705938A (pt) Valvula de freio a dois estagios
GB1239134A (pt)
KR880002711A (ko) 마스터 실린더용 급속 충전 밸브 기구
EP0219833A3 (en) Portless type master cylinder device with intake valve and flow resisting means between pressure chamber and reservoir chamber
US4832417A (en) Brake system
JPS5989834A (ja) 液圧作動クラツチの防振装置
JPH0741825B2 (ja) 流体ブレ−キブ−スタ
JPS5853617B2 (ja) ブレ−キ液圧制御装置
JPH0653489B2 (ja) 流体援助装置
KR890009700A (ko) 브레이크 장치
US2415245A (en) Master cylinder
GB2112041A (en) Fluid displacement well safety valve
JPS5650842A (en) Brake master cylinder device

Legal Events

Date Code Title Description
FF Decision: intention to grant
FG9A Patent or certificate of addition granted
B24C Patent annual fee: request for for restoration

Free format text: REFERENTE A 12A E 13A ANUIDADE(S).

B24H Lapse because of non-payment of annual fees (definitively: art 78 iv lpi)
B24F Patent annual fee: publication cancelled

Free format text: ANULADA A PUBLICACAO CODIGO 24.8 NA RPI NO 2257 DE 08/04/2014 POR TER SIDO INDEVIDA.

B21F Lapse acc. art. 78, item iv - on non-payment of the annual fees in time

Free format text: REFERENTE AS 12A, 13A E 14A ANUIDADES.

B24J Lapse because of non-payment of annual fees (definitively: art 78 iv lpi, resolution 113/2013 art. 12)

Free format text: EM VIRTUDE DA EXTINCAO PUBLICADA NA RPI 2606 DE 15-12-2020 E CONSIDERANDO AUSENCIA DE MANIFESTACAO DENTRO DOS PRAZOS LEGAIS, INFORMO QUE CABE SER MANTIDA A EXTINCAO DA PATENTE E SEUS CERTIFICADOS, CONFORME O DISPOSTO NO ARTIGO 12, DA RESOLUCAO 113/2013.