GB1182311A - Improvements in or relating to Hydraulic Systems - Google Patents
Improvements in or relating to Hydraulic SystemsInfo
- Publication number
- GB1182311A GB1182311A GB281967A GB281967A GB1182311A GB 1182311 A GB1182311 A GB 1182311A GB 281967 A GB281967 A GB 281967A GB 281967 A GB281967 A GB 281967A GB 1182311 A GB1182311 A GB 1182311A
- Authority
- GB
- United Kingdom
- Prior art keywords
- pressure
- brake
- valve
- circuits
- chamber
- 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
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
- 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
- B60T11/101—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 equalising arrangements
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B11/00—Servomotor systems without provision for follow-up action; Circuits therefor
- F15B11/16—Servomotor systems without provision for follow-up action; Circuits therefor with two or more servomotors
- F15B11/20—Servomotor systems without provision for follow-up action; Circuits therefor with two or more servomotors controlling several interacting or sequentially-operating members
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- General Engineering & Computer Science (AREA)
- Transportation (AREA)
- Regulating Braking Force (AREA)
- Non-Deflectable Wheels, Steering Of Trailers, Or Other Steering (AREA)
Abstract
1,182,311. Braking systems; valves. ALFRED TEVES G.m.b.H. 19 Jan., 1967 [26 Jan., 1966; 12 March, 1966], No. 2819/67. Headings F2F and F2V. An hydraulic system comprises two circuits, each having an independently operable pressure transmitting device (5, 6), Fig. 1 (not shown), and a pressure receiving device (1, 2) interconnected by a pressure equalizing valve (7) including two pistons 13, 14, Fig. 2, each containing a spring closed valve 22, 23 and having means for opening the valve in the other piston arranged so that when the pressure transmitting devices are independently operated the valves remain closed and the circuits remain separated and when the pressure transmitting devices are operated together the pistons are forced towards each other to unseat the valves to connect the two circuits to equalize the pressures. The pressure equalizing valve interconnects two pressure lines (3, 4) between master cylinders (5, 6) and brake cylinders (1, 2). For steering a brake pedal is operated to increase pressure in either brake circuit which forces the corresponding control piston 13, 14, Fig. 2, against the force of spring 16 or 17 to the stop 15. The other control piston 14 or 13 abuts the end cover 9 or 10 so that the exensions 30, 31 do not reach the valve members 22, 23 and the valves 20, 21 remain closed. The brake circuits remain separate and can be operated independently. If both brake pedals are depressed the control pistons 13, 14 are both moved to stop 15 so that extensions 30, 31 open the valve members 22, 23 to interconnect the brake circuits thereby equalizing the braking force applied at each wheel. In another embodiment control piston 13 or 14, Fig. 3, moves against the pressure of a spring 47 to stop 45 or 46. The resulting pressure increase in chamber 63 opens the valve member 22 or 23 of the moving control piston to allow passage of fluid from chamber 63. Fluid in chambers 59 or 60 is forced via bores 57 or 58 into an equalizing reservoir 56. The other control piston remains against its stop and its valve member remains closed so that the two brake circuits remain separated. When the circuit pressure is relieved the piston 13 or 14 returns to its inoperative position and the fluid previously forced out of chamber 63 is returned via bores 52 or 53. Simultaneous application of both right-hand and left-hand brakes causes interconnection of the brake circuits as in Fig. 2. If the two steering road wheels are braked with the driving road wheels the brake cylinders of the steering road wheels are connected to chamber 63 by a further brake connection (not shown). The steering road wheels are therefore only braked when both of the vehicle brakes are applied. When only one of the steering brakes is applied no substantial increase occurs in chamber 63. Reference has been directed by the Comptroller to Specification 983,356.
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DET0030323 | 1966-01-26 | ||
DET0030659 | 1966-03-12 |
Publications (1)
Publication Number | Publication Date |
---|---|
GB1182311A true GB1182311A (en) | 1970-02-25 |
Family
ID=26000141
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB281967A Expired GB1182311A (en) | 1966-01-26 | 1967-01-19 | Improvements in or relating to Hydraulic Systems |
Country Status (3)
Country | Link |
---|---|
DE (2) | DE1550952A1 (en) |
FR (1) | FR1501309A (en) |
GB (1) | GB1182311A (en) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE2342430A1 (en) * | 1972-08-22 | 1974-03-07 | Girling Ltd | CONTROL DEVICE FOR CONNECTING TWO INTERCONNECTING HYDRAULIC SYSTEMS |
FR2470884A1 (en) * | 1979-12-07 | 1981-06-12 | Dba | Pressure equaliser for dual circuit braking systems - has non-return valves to equalise normal braking pressure and also allows directional braking |
Families Citing this family (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE2162441C2 (en) * | 1970-12-30 | 1982-10-07 | Svecia Silkscreen Maskiner AB, Vaarby, Stockholm | Silkscreen printing mach. stencil frame elevator - comprises hydraulica-lly operated frame actuated for inspection |
DE3839268C2 (en) * | 1988-11-21 | 1999-07-01 | Fte Automotive Gmbh | Hydraulic balancing valve |
-
1966
- 1966-01-26 DE DE19661550952 patent/DE1550952A1/en active Pending
- 1966-03-12 DE DE19661680816 patent/DE1680816A1/en active Pending
- 1966-11-17 FR FR83979A patent/FR1501309A/en not_active Expired
-
1967
- 1967-01-19 GB GB281967A patent/GB1182311A/en not_active Expired
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE2342430A1 (en) * | 1972-08-22 | 1974-03-07 | Girling Ltd | CONTROL DEVICE FOR CONNECTING TWO INTERCONNECTING HYDRAULIC SYSTEMS |
FR2470884A1 (en) * | 1979-12-07 | 1981-06-12 | Dba | Pressure equaliser for dual circuit braking systems - has non-return valves to equalise normal braking pressure and also allows directional braking |
Also Published As
Publication number | Publication date |
---|---|
DE1550952A1 (en) | 1969-07-24 |
DE1680816A1 (en) | 1970-05-14 |
FR1501309A (en) | 1967-11-10 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
PS | Patent sealed | ||
PLNP | Patent lapsed through nonpayment of renewal fees |