GB250913A - Improvement in power actuators or servomotors - Google Patents
Improvement in power actuators or servomotorsInfo
- Publication number
- GB250913A GB250913A GB6732/26A GB673226A GB250913A GB 250913 A GB250913 A GB 250913A GB 6732/26 A GB6732/26 A GB 6732/26A GB 673226 A GB673226 A GB 673226A GB 250913 A GB250913 A GB 250913A
- Authority
- GB
- United Kingdom
- Prior art keywords
- valve
- piston
- ports
- rod
- pressure
- 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
- 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
- B60T13/24—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 gaseous
- B60T13/241—Differential pressure systems
- B60T13/242—The control valve is provided as one unit with the servomotor cylinder
- B60T13/243—Mechanical command of the control valve, mechanical transmission to the brakes
Landscapes
- Engineering & Computer Science (AREA)
- Transportation (AREA)
- Mechanical Engineering (AREA)
- Actuator (AREA)
Abstract
250,913. Bragg, C. S., and Kliesrath, V. W. April 16, 1925, [Convention date]. Fluid-pressure.-A pneumatic or hydraulic relay for operating brakes &c. comprises a doubleacting piston in a cylinder, provided with a cylindrical valve chamber having ports connecting it with the cylinder on either side of the piston, and a piston valve within the chamber, the valve having a suction chamber open to the interior of a sleeve operating the valve and cylindrical portions adapted to register with the ports, and means for admitting higher pressure fluid to both ends of the valve chamber. The operation of the valve controls the supply and exhaust of fluid to the ends of the cylinder and so actuates the piston and a part connected to it. Fig. 1 shows the piston carrying a tubular rod 7 passing through the cylinder stuffing-box and fitted with a lug 10 for attachment to a part of the brake, clutch, or other mechanism of a motor vehicle or aircraft; a pressure fluid inlet 11 is provided in the end of the rod. The piston hub is formed as a hollow valve chamber containing a valve 14 mounted on a hollow rod 20 passing through a stuffing-box in the other end of the cylinder and having a lug 30 for attachment to a brake pedal &c. The hollow rod 20 is divided by a plug 17 into a suction part open to a suction pipe 29, connected e.g. to the inlet manifold of an internalcombustion engine, and a pressure part open to the pressure, inlet 11, each of these parts having ports 18, 26. The suction ports 18 communicate with a suction chamber 23, Fig. 3a, in the valve 14, the pressure ports lead directly to one end of the valve chamber and through longitudinal passages in the valve to the other end. By operation of the valve one or other of the ports 15, 16, in the piston hub may be opened to the suction chamber 23 while the other is opened to the end of the valve chamber, and the piston is moved accordingly. A spring 31 fnr returning the. valve e.g. in the operation of brake mechanism is disposed. between the valve rod 20 and the pistonrod 7. The rod 20 has a flanged nut 37 which can be brought into contact with the end of the piston-rod by further actuation of the pedal when the brake mechanism has been automatically actuated to its fullest extent, thereby giving a further motion; foot or hand actuation in case of power failure is also rendered possible. The spring may be dispensed with, operation of the valve being effected by the operator in each direction. According to the Specification as open to inspection under Sect. 91 (3) (a), Fig. 4 (Cancelled) shows a modified apparatus, suitable for aviation control or for steering motor boats, in which the piston-rod extends at each side and wholly encloses the valve rod, connections 130, 130a. 110, 110a being provided at each end for the actuating means and the actuated parts. In a modified valve construction, Fig. 6a Cancelled), the ports 215, 216 are in the normal or off position open to vacuum. The relays may be subject to vacuum and atmospheric or super pressure, or to vacuum and super pressure on opposite sides. Fig. 7 (Cancelled) shows an hydraulic relay operated by a continuous circulation of oil from an inlet 311a to an outlet 329, the valve being constructed, as in Fig. 8a (Cancelled), to allow this free flow in the normal position. Movement of the valve closes the connection of one of the ports to the suction passage, and pressure building up on one side of the piston moves the piston and its connected part. In a further modification, independent oil inlets are provided to each end of the valve chamber, the longitudinal passages through the valve being omitted. This subject-matter does not appear in the Specification as accepted.
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US250913XA | 1925-08-16 | 1925-08-16 |
Publications (1)
Publication Number | Publication Date |
---|---|
GB250913A true GB250913A (en) | 1927-06-10 |
Family
ID=21823993
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB6732/26A Expired GB250913A (en) | 1925-08-16 | 1926-03-10 | Improvement in power actuators or servomotors |
Country Status (1)
Country | Link |
---|---|
GB (1) | GB250913A (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2544043A (en) * | 1947-01-25 | 1951-03-06 | Bendix Aviat Corp | Power brake control with automatic locking means |
-
1926
- 1926-03-10 GB GB6732/26A patent/GB250913A/en not_active Expired
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2544043A (en) * | 1947-01-25 | 1951-03-06 | Bendix Aviat Corp | Power brake control with automatic locking means |
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