[go: up one dir, main page]

GB1481084A - Pressure-differential indicators - Google Patents

Pressure-differential indicators

Info

Publication number
GB1481084A
GB1481084A GB4332474A GB4332474A GB1481084A GB 1481084 A GB1481084 A GB 1481084A GB 4332474 A GB4332474 A GB 4332474A GB 4332474 A GB4332474 A GB 4332474A GB 1481084 A GB1481084 A GB 1481084A
Authority
GB
United Kingdom
Prior art keywords
piston
pressure
indicator
circuit
pin
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
GB4332474A
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.)
Automotive Products PLC
Original Assignee
Automotive Products PLC
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 Automotive Products PLC filed Critical Automotive Products PLC
Priority to GB4332474A priority Critical patent/GB1481084A/en
Priority to AU85191/75A priority patent/AU493777B2/en
Priority to DE19752544224 priority patent/DE2544224C2/en
Priority to FR7530704A priority patent/FR2287691A1/en
Publication of GB1481084A publication Critical patent/GB1481084A/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
    • B60T17/00—Component parts, details, or accessories of power brake systems not covered by groups B60T8/00, B60T13/00 or B60T15/00, or presenting other characteristic features
    • B60T17/18—Safety devices; Monitoring
    • B60T17/22—Devices for monitoring or checking brake systems; Signal devices
    • B60T17/226—Devices for monitoring or checking brake systems; Signal devices using devices being responsive to the difference between the fluid pressions in conduits of multiple braking systems
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01L—MEASURING FORCE, STRESS, TORQUE, WORK, MECHANICAL POWER, MECHANICAL EFFICIENCY, OR FLUID PRESSURE
    • G01L13/00—Devices or apparatus for measuring differences of two or more fluid pressure values
    • G01L13/02—Devices or apparatus for measuring differences of two or more fluid pressure values using elastically-deformable members or pistons as sensing elements

Landscapes

  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Transportation (AREA)
  • Mechanical Engineering (AREA)
  • Valves And Accessory Devices For Braking Systems (AREA)
  • Hydraulic Control Valves For Brake Systems (AREA)
  • Transmission Of Braking Force In Braking Systems (AREA)

Abstract

1481084 Indicators of imbalance of brake circuits AUTOMOTIVE PRODUCTS Ltd 22 Sept 1975 [7 Oct 1974] 43324/74 Heading F2F A pressure differential indicator 21 indicates a pressure difference between the circuit pressures of a dual hydraulic braking system correponding to failure of either circuit while allowing relatively small movements, to avoid seizure of the operating piston of the indicator, without indication. The indicator comprises a stepped bore 36 housing a stepped piston having a large diameter part 37 and a smaller diameter part 38 acted on by pressure in rear and front brake circuits respectively generated by tandem master cylinder 11. In normal brake operation the piston is centred in a neutral position by pin 52 and springs 48 and 53 but may perform small movements about the central position in response to small fluctuations in pressure, limited by the contact of washers 55 and 54 with abutment 56 and the end of pin 52 remote from the piston respectively. If either brake circuit should fail, the resulting relatively-large pressure difference across the piston will create a sufficient force thereon to slide pin 52 through either of the washers 54 and 55 with the result that either of piston parts 37 or 38 will contact probe 46 to operate a warning light. The line from the indicator to the rear brakes 29, 31 incorporates a pressure reducing valve 28 which is bypassed via line 32 in the event of failure of the front brake circuit.
GB4332474A 1974-10-07 1974-10-07 Pressure-differential indicators Expired GB1481084A (en)

Priority Applications (4)

Application Number Priority Date Filing Date Title
GB4332474A GB1481084A (en) 1974-10-07 1974-10-07 Pressure-differential indicators
AU85191/75A AU493777B2 (en) 1974-10-07 1975-09-25 Pressure-differental indicators
DE19752544224 DE2544224C2 (en) 1974-10-07 1975-10-03 Pressure difference display
FR7530704A FR2287691A1 (en) 1974-10-07 1975-10-07 PRESSURE DIFFERENCE INDICATOR

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB4332474A GB1481084A (en) 1974-10-07 1974-10-07 Pressure-differential indicators

Publications (1)

Publication Number Publication Date
GB1481084A true GB1481084A (en) 1977-07-27

Family

ID=10428273

Family Applications (1)

Application Number Title Priority Date Filing Date
GB4332474A Expired GB1481084A (en) 1974-10-07 1974-10-07 Pressure-differential indicators

Country Status (3)

Country Link
DE (1) DE2544224C2 (en)
FR (1) FR2287691A1 (en)
GB (1) GB1481084A (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3841749A1 (en) * 1988-12-12 1990-06-13 Wabco Westinghouse Fahrzeug METHOD AND ARRANGEMENT OF AN ELECTRICALLY CONTROLLED BRAKE CIRCUIT OF A MULTI-CIRCUIT BRAKE SYSTEM WITH PRESSURE-OPERATED BRAKES

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE255651C (en) *
US3394401A (en) * 1966-04-13 1968-07-23 Amp Inc Fluid system safety device

Also Published As

Publication number Publication date
AU8519175A (en) 1977-03-31
DE2544224C2 (en) 1985-04-04
FR2287691B1 (en) 1981-12-24
DE2544224A1 (en) 1976-04-08
FR2287691A1 (en) 1976-05-07

Similar Documents

Publication Publication Date Title
GB1253696A (en) Improved vehicle brake system
US3228194A (en) Split system indicating means
US3727989A (en) Emergency bypass for brake pressure control
US3477549A (en) Dual automotive brake system
GB1152054A (en) Warning Device for Split Brake System
GB1168170A (en) Dual-Circuit Brake System
US3672732A (en) Dual hydraulic braking systems for vehicles
US3439323A (en) Fluid pressure failure indicating means
GB887631A (en) An hydraulic master cylinder and dual piston assembly
US3772672A (en) Differential pressure warning device for dual brake system
GB1417023A (en) Pressure generating devices for vehicle braking systems
GB1307479A (en) Safety mechanism for vehicle brake installations
GB1481084A (en) Pressure-differential indicators
US3311422A (en) Front and rear brake proportioning system
GB1358000A (en) Motor vehicle braking circuits
GB1430859A (en) Pressure imbalance detecting device
GB1475645A (en) Brake pressure warning device
GB1290750A (en)
GB999538A (en) Improvements relating to hydraulic braking systems
GB993333A (en) Improvements in or relating to fluid pressure-operated braking apparatus
GB981176A (en) Hydraulic braking systems for vehicles
GB1260639A (en) Warning device for hydraulic brake systems
ES448783A1 (en) Dual hydraulic braking system for vehicles
GB1435854A (en) Tandem mastercylinder for a split braking circuit
GB1177885A (en) Warning Device for a Split Braking System

Legal Events

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