GB613527A - Two-stage hydraulic master cylinder - Google Patents
Two-stage hydraulic master cylinderInfo
- Publication number
- GB613527A GB613527A GB32282/45A GB3228245A GB613527A GB 613527 A GB613527 A GB 613527A GB 32282/45 A GB32282/45 A GB 32282/45A GB 3228245 A GB3228245 A GB 3228245A GB 613527 A GB613527 A GB 613527A
- Authority
- GB
- United Kingdom
- Prior art keywords
- piston
- pressure
- cylinder
- passage
- valve
- 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
- B60T11/16—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)
- Braking Systems And Boosters (AREA)
Abstract
613,527. Hydraulic master cylinders. WAGNER ELECTRIC CORPORATION. Nov. 29, 1945, No. 32282. Convention date, Jan. 4. [Class 103 (i)] In a two-stage master cylinder such as described in Specification 575,417, in which the cylinder initially slides bodily to cut off communication thereof with the reservoir and the low-pressure piston is rendered ineffective at a predetermined pressure by flow through a valve-controlled passage in the high-pressure piston, this passage is restricted to provide gradual transition from the low to the high pressure stage and a passage through the low-pressure piston which byepasses the restricted passage when the pistons are retracted is closed by initial forward movement of the highpressure piston relatively to the low-pressure piston. The cylinder 14 is slidably supported within the reservoir 1 by the outlet 15 of the cylinder and the rear end thereof which respectively slide within and over members 3, 12 screwed into the reservoir. A spring 11 bearing through a washer on the inner end of the plug 3 normally holds the cylinder in the position shown in which it communicates with the reservoir through passages 16. The highpressure piston 18, 23, 30 slides in the cylinder member 12 and in the low-pressure piston 36 which normally abuts on a fixed ring 35. A passage 41 through the head 30 of the lowpressure piston 'is normally' closed by a valve 31 acted on by a spring 26 and connected to a normally unseated valve 27 to which is attached a sealing cup 28. The space at the rear of the piston 36 is normally connected to the forward cylinder chamber 14<SP>1</SP> by passages 43 in the piston. The piston 23, 30 when initially moved by the pedal carries the cylinder forward by friction to close the passages 16 and then engages the piston 36, a valve member 38 sealing off the forward chamber 14<SP>1</SP> from the space at the rear of the piston 36-which, however, receives' liquid from the reservoir through passages 14a, 17 past the sealing-cup 28 and passages 44. When the pressure in chamber 14<SP>1</SP> acting on the valve 31 against the pressure of the spring 26 is sufficient to unseat the valve, the chambers at front and rear of the piston 36 are connected together by the passage 41 and the piston thus rendered ineffective. The passage 41 is restricted to delay equalization of the pressure at the two sides of the piston 36 so that the transition from the low to the high pressure phase is rendered gradual and the change-over tends to be further delayed if the pedal is moved rapidly.
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US613527XA | 1945-01-04 | 1945-01-04 |
Publications (1)
Publication Number | Publication Date |
---|---|
GB613527A true GB613527A (en) | 1948-11-30 |
Family
ID=22035236
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB32282/45A Expired GB613527A (en) | 1945-01-04 | 1945-11-29 | Two-stage hydraulic master cylinder |
Country Status (1)
Country | Link |
---|---|
GB (1) | GB613527A (en) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN102410278A (en) * | 2011-11-11 | 2012-04-11 | 三一重工股份有限公司 | Multistage single-action hydraulic cylinder and engineering machinery provided with same |
CN106627537A (en) * | 2015-11-04 | 2017-05-10 | 浙江万向精工有限公司 | Two-level assisting force ratio non-motor hydraulic braking system based on flexible pipeline connection |
-
1945
- 1945-11-29 GB GB32282/45A patent/GB613527A/en not_active Expired
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN102410278A (en) * | 2011-11-11 | 2012-04-11 | 三一重工股份有限公司 | Multistage single-action hydraulic cylinder and engineering machinery provided with same |
CN106627537A (en) * | 2015-11-04 | 2017-05-10 | 浙江万向精工有限公司 | Two-level assisting force ratio non-motor hydraulic braking system based on flexible pipeline connection |
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