Abstract: A brake fluid reservoir (10) for a motor vehicle having at least one impervious and flexible wall (12) whose capacity is adjusted to the volume of brake fluid contained therein to avoid placing the reservoir at a depression with a drop in the level of brake fluid. The flexible wall (12) forms a pouch containing brake fluid and has an outlet arrangement (16) that is initially closed by an impervious membrane (32) that is punctured to supply brake fluid to a second reservoir (20) connected to a brake system.

Abstract: A master cylinder having a housing with first and second bores that are connected to a same circuit in a braking system. A first piston is sealingly retained in the first bore to define a first chamber and a second piston is sealingly retained in the second bore to define a second chamber. The first piston has of a first cylindrical member that is connected to a second cylindrical member by a shaft. The shaft includes an actuation and a retraction ramp that terminate at an apex. An input force applied to the second cylindrical member is directly applied through the shaft to the first cylindrical member and through the actuation and retraction ramps to the second piston to respectively communicate fluid simultaneously to the same circuit.

Abstract: A master cylinder and booster device for a motor vehicle braking system, in which the master cylinder (10) and the booster (12) are assembled to form a one-piece entity comprising a small reservoir (20) of brake fluid mounted on the master cylinder (10) and connected by a flexible duct (22) to a separate brake fluid reservoir (24) secured temporarily to the entity (10 12) for the purposes of delivering it to a motor vehicle manufacturer.

Abstract: A hydraulic fluid container (10) for a vehicle hydraulic brake system comprises at least one connecting sleeve (14), in which a valve member (20) is displaceably guided. The valve member (20) in a first position, into which it is spring-biased, blocks the connecting sleeve (14) and in a second position clears the connecting sleeve (14). On its circumferential surface the valve member (20) is provided with at least one radially elastic detent element (32; 32′). The connecting sleeve (14) in its inner side wall (36) has at least one recess, into which the detent element (32; 32′) latches during introduction of the valve member (20) into the connecting sleeve (14) and which in relation to the direction of displacement of the valve member (20) forms a stop, which defines the first position of the valve member (20).

Abstract: The subject invention provides a master cylinder having a compact profile. In particular, the master cylinder comprises a hollow body having a continuous outer wall with a continuous thickness. An end wall is integrally formed with the outer wall at a first end to close an end of an integrally formed bore. A number of apertures are formed within the outer wall to provide fluid communication between the outer wall and the bore. A flange is also integrally formed with the outer wall at a second end to define a fully integrated master cylinder. The outer wall further includes thickened sections extending between an inner surface of the bore and a mounting surface with the thickened sections being at least 30 percent smaller than the inner diameter of the bore for providing the compact profile of the integrated master cylinder.

Abstract: The present invention is an improved reservoir cap for a braking fluid reservoir including a cylindrical skirt for surrounding an opening of the reservoir body, a disc portion having a hard stop formed unitarily with the cylindrical skirt for closing the reservoir fill opening, and a plurality of teeth formed unitarily about the hard stop for securing an elastic member. The elastic member is disposed about the teeth of the reservoir cap and secured thereto. The elastic member defines ridges disposed circumferentially about its center. Between the ridges and the center of the elastic member is a channel, which in turn defines a pair of openings which permit the flow of excess fluid through the elastic member, thereby reducing the possibility of fluid overflow, and thus preventing excess brake fluid from permeating the reservoir cap and leaking into the engine compartment of a vehicle.

Abstract: A support (1) through which first and second outlet pipes (7) from a first tank (9) is connected to a second tank (42). The support (1) has rear wall (17) separated from a front wall (37) by a spacer (39) to define rectangular cavities (33) therein. The rear wall (17) has a first and second sleeves (5) that extend therefrom and are correspondingly located in the outlet pipes (7). The front wall (37) has openings (35) therein that are aligned with openings (3) defined by the first and second sleeves (5). First and second claw rings (15) are correspondingly attached to the first and second sleeves (5) and first and second tubular pipes (41.1,41.2) are pushed through the claw rings (15) and into the first and second outlet pipes (7). Radial protrusions (13) on the claw rings (15) engage the tubular pipes (41.1,41.2) to define a sealed connection.

Abstract: A master cylinder having a reservoir and a cylinder formed from a single piece of molded plastic. A sight gauge is molded into a sidewall of the reservoir to permit the level of hydraulic fluid to be checked without removing the reservoir's cap. A vent hole and a replenishing hole permit hydraulic fluid to flow between the reservoir and the cylinder. A baffle is provided to deflect “geysers” that can occur during brake bleeding when hydraulic fluid is forced up through the replenishing port. In the preferred embodiment, the baffle includes an upright portion that is used to retain a float in alignment with the sight gauge.

Abstract: A throttle valve mechanism having a throttle function of throttling the flow of working fluid from a pressure delivering chamber to a reservoir at the operation time of the piston of a master cylinder, a valve function of allowing the working fluid to flow from the reservoir to the pressure delivering chamber by opening the valve at the return time of the piston, and a relief valve function of allowing a large quantity of working fluid to flow from the pressure delivering chamber to the reservoir is disposed in a fluid passage for connecting the master cylinder to the reservoir. The master cylinder can decrease the quantity of working fluid flowing to the reservoir at the time of operation start of the master cylinder, and can respond to the fluctuations in fluid pressure quickly when a traction control unit, an automobile stability control unit, etc. are released.

Abstract: A fluid injection port 10 is formed in the upper portion of a reservoir 5 at the front side of a vehicle. A first union hole 13 and a second union hole 14 are formed in a bottom wall 6g, and a level detector 15 is provided in a fluid chamber 4. The fluid chamber 4 is divided by partition walls 6i and 6j into a first fluid chamber 4a, a second fluid chamber 4b and a third fluid chamber 4c. The fluid injection port 10 communicates with the first fluid chamber 4a, the first union hole 13 communicates with both the first and the second fluid chambers 4a and 4b, and the second union hole 14 and the level detector 15 are placed in the third fluid chamber 4c. The second fluid chamber 4b and the third fluid chamber 4c communicate with each other via an opening 19.

Abstract: A hydraulic transmission device includes a front end member and a rear end member between which an active device, an active rotor, an intermediate member, a passive rotor and a passive device are connected. A closed space is defined in the transmission device and each part of the device has paths, openings or recesses which form a path system for the hydraulic liquid. The active device has control valves which closes or opens the paths so as to rotate the active rotor which is connected to an input power, and drive the passive rotor which is connected to an output device. The pressure of the hydraulic liquid can be controlled to rotate the passive rotor in desired ways.

Abstract: In the present invention, a throttle valve mechanism 43 having a throttle function (46b) of throttling the flow of working fluid from a pressure delivering chamber 29, 30 to a reservoir 19 at the operation time of the piston 27, 28 of a master cylinder 20, a valve function (46d) of allowing the working fluid to flow from the reservoir 19 to the pressure delivering chamber 29, 30 by opening the valve at the return time of the piston 27, 28, and a relief valve function (46c) of allowing a large quantity of working fluid to flow from the pressure delivering chamber 29, 30 to the reservoir 19 is disposed in a fluid passage for connecting the master cylinder 20 to the reservoir 19.

Abstract: To provides a technique capable of replenishing a working fluid smoothly while employing a method for replacing an atmospheric air with the working fluid. The reservoir apparatus (10) includes a main reservoir (20) having an inlet opening for feeding a hydraulic fluid, and an auxiliary reservoir (50) connecting thereto through a piping (30). There is a diagonally extending connecting pipe (60) at the auxiliary reservoir (50). There is a recessed portion (80) at an opening portion (64) of an inner periphery of the connecting pipe (60). This recessed portion (80), when compared with the case where there is no such a recessed portion, serves to enlarge the opening portion (64) of the connecting pipe (60) and more smoothly flow the replenishment working fluid at a nearby area of the opening portion (64).

Abstract: A housing (2) for a master cylinder (1) having a bore (3) in which a piston (4) is slideable to pressurize fluid ahead of a main seal (5) on the piston for the supply of pressurized fluid to an outlet (10). Two inlet openings (7,8) are provided into the bore, a first opening (7) for recuperation of fluid from an associated reservoir to that part (6) of the bore ahead of the main piston seal (5) when the piston is in a retracted position and a second opening (8) placing that portion (11) of the bore between the main piston seal and a second piston seal (9) behind the main seal in permanent communication with the reservoir. The housing also has an external inlet connection (41) formed integrally with the housing. The inlet connection has a free end for direct connection with a conduit (41a) connected with the associated reservoir and having a passage (42) for connection with the conduit which opens into the housing bore at the first (7) and second (8) openings.

Abstract: A master cylinder for vehicle braking systems includes a housing having a central cavity, at least one fluid supply inlet port, at least one pressure outlet port, and a flange at one end thereof. A piston actuation mechanism within the central cavity is moveable between a first position wherein the central cavity is in fluid communication with the fluid supply inlet and a second position where the central cavity is in fluid communication with the pressure outlet. A cup-shaped end cap is fastened to the housing flange in a fluid sealing relationship wherein the cup-shaped end cap receives at least a portion of the piston actuating mechanism therein and further retains the piston actuation mechanism in an operational configuration within the housing.

Abstract: The object of the present invention is to exhibit the function of a throttle valve mechanism without making the whole of a master cylinder large-sized and to simplify the structure and to reduce the number of pieces of parts. In order to attain this object, the present invention has throttle valve mechanisms with a floating valve body which sits and throttles the flow of the hydraulic fluid to the reservoir from the pressure generating chambers when the pistons operate and which opens when the pistons do not operate, and the throttle valve mechanisms are arranged in the fluid passage for the supplementation of the hydraulic fluid, and the throttle valve mechanisms have a floating valve body with a throttle passage and a valve seat with and from which the floating valve body is brought into contact and is separated, and the valve seat is provided at the tip of the connecting portions to the cylinder body of the reservoir.

Abstract: A liquid reservoir, particularly for use in an hydraulic system. The reservoir includes a container and a cover cap, and it is intended for containing an hydraulic pressure medium. A pressure equalization component is provided within the container for compensating for pressure differences between the interior of the container and the surrounding atmosphere, and a level compensation component is provided for compensating for changes in the volume of the pressure medium. The pressure equalization component is functionally separate from the level compensation component.

Abstract: A reservoir flange portion is formed in a leg portion of a reservoir so as to protrude beyond a seal member in a direction of a cylinder body and to extend radially outward. An annular retaining member, which has an outer diameter larger than the outer diameter of the reservoir flange portion and an inner diameter smaller than the outer diameter of the reservoir flange portion, is interposed between an engaging surface of the reservoir flange portion of the reservoir and an engaging surface of the seal member. By this arrangement, retention of the reservoir relative to the seal member and the cylinder body is markedly improved by means of the retaining member having an outer diameter larger than the outer diameter of the reservoir flange portion.

Abstract: A fluid reservoir system (10) for a master cylinder (12) having first and second fluid chambers each with associated pistons, the system comprising a main reservoir (16); a first secondary reservoir (18) for mounting on the master cylinder to supply fluid to the first fluid chamber; a second secondary reservoir (18) for mounting on the master cylinder to supply fluid to the second fluid chamber; a first fluid pipe (22) fluidly connecting the main reservoir with the first secondary reservoir; and a second fluid pipe (24) fluidly connecting the main reservoir with the second secondary reservoir; wherein the first secondary reservoir has a fluid capacity which is substantially equal to, or greater than, the capacity of fluid required by the first fluid chamber during full stroke of the associated master cylinder piston; and wherein the second secondary reservoir has a fluid capacity which is substantially equal to, or greater than, the capacity of fluid required by the second fluid chamber during full stroke of

Abstract: A fluidic valve assembly having a fluidic valve mechanism similar to the mechanisms in U.S. Pat. Nos. 5,003,780 and 5,348,040 provided with improved valve positioning devices which provide improvements in providing the force to move the valve members, and in positioning fluidic valve members in their valve chambers so that the valve members open and close a chamber port, depending upon the direction of fluid flow through the valve chamber.

Abstract: A low vent pressure master cylinder reservoir cap diaphragm assembly is used to keep brake fluid in the reservoir but allow air to freely pass to and from atmosphere. The diaphragm assembly includes a flexible sealing component having an aperture and a fluid flow restrictive material bonded to the flexible sealing component covering the aperture. The fluid flow restrictive material allows a limited amount of brake fluid to pass through but allows air to freely pass through. The flexible sealing component is preferably made from a rubber material. The fluid flow restrictive material is preferably made from a material such as nylon that is either mesh or has small pores.

Abstract: A fluid injection port 10 is formed in the upper portion of a reservoir 5 at the front side of a vehicle. A first union hole 13 and a second union hole 14 are formed in a bottom wall 6g, and a level detector 15 is provided in a fluid chamber 4. The fluid chamber 4 is divided by partition walls 6i and 6j into a first fluid chamber 4a, a second fluid chamber 4b and a third fluid chamber 4c. The fluid injection port 10 communicates with the first fluid chamber 4a, the first union hole 13 communicates with both the first and the second fluid chambers 4a and 4b, and the second union hole 14 and the level detector 15 are placed in the third fluid chamber 4c. The second fluid chamber 4b and the third fluid chamber 4c communicate with each other via an opening 19.

Abstract: A brake master cylinder and a motorcycle including the brake master cylinder. The master cylinder has a main body and a sub-tank extending parallel to the main body. The master cylinder is arranged on the motorcycle to be generally perpendicular to the road surface, and the sub-tank is aligned with an axis of the main body. The main body and the sub-tank are integral and the sub-tank is disposed outwardly from the vehicle with respect to the axis of the main body. The resultant shape of the master cylinder is an elongated body which does not add to the width of the vehicle, and uses minimal space. The main body includes a mounting seat for mounting a brake hose, the mounting seat being arranged on the main body so as to extend perpendicularly to the axis of the main body.

Abstract: A fluid reservoir system (10) for a master cylinder (12) having first and second fluid chambers each with associated pistons, the system comprising a main reservoir (16); a first secondary reservoir (18) for mounting on the master cylinder to supply fluid to the first fluid chamber; a second secondary reservoir (18) for mounting on the master cylinder to supply fluid to the second fluid chamber; a first fluid pipe (22) fluidly connecting the main reservoir with the first secondary reservoir; and a second fluid pipe (24) fluidly connecting the main reservoir with the second secondary reservoir; wherein the first secondary reservoir has a fluid capacity which is substantially equal to, or greater than, the capacity of fluid required by the first fluid chamber during full stroke of the associated master cylinder piston; and wherein the second secondary reservoir has a fluid capacity which is substantially equal to, or greater than, the capacity of fluid required by the second fluid chamber during full stroke of

Abstract: The present invention provides a reservoir cap and bleed mechanism for use with the fluid reservoir of a dry interface corner actuator. The reservoir cap and bleed mechanism displaces a portion of the reservoir volume during filling and provides a diaphragm to maintain a fill reservoir volume during operation. The fluid reservoir can be bled and filled to the desired brake fluid level through a sealable passage in the reservoir cap assembly without removing the reservoir cap.

Abstract: A hydraulic brake system for a vehicle for braking the vehicle by brake pedal actuation and/or automatic braking. A pump is provided which has a suction connection that communicates with a supply container for a pressure fluid and a pressure connection for aspirating pressure fluid from the supply container and pumping the fluid to a connection of a master cylinder. A brake circuit of the vehicle brake system is connected with vehicle wheels associated with wheel brake cylinders and with valve assemblies for brake pressure modulation and is connected to the connection of the master cylinder. A valve pressure is also provided between a pressure chamber that communicates with the connection of the master cylinder and the supply container for pressure fluid.

Abstract: A reservoir flange portion is formed in a leg portion of a reservoir so as to protrude beyond a seal member in a direction of a cylinder body and extend radially outward. An annular retaining member, which has an outer diameter larger than the outer diameter of the reservoir flange portion and an inner diameter smaller than the outer diameter of the reservoir flange portion, is interposed between an engaging surface of the reservoir flange portion of the reservoir on a side of the seal member and an engaging surface of the seal member on a side of the cylinder body. By this arrangement, retention of the reservoir relative to the seal member and the cylinder body is markedly improved by means of the retaining member having an outer diameter larger than the outer diameter of the reservoir flange portion.

Abstract: A reservoir assembly for a vehicle hydraulic braking system includes two chambers (2, 3) for the storage of hydraulic fluid. The reservoir assembly is provided with a structure for increasing the effective volume of one of the chambers (2), for example a bellows (12) or a bucket (30), and which may be operable in conjunction with the fitting of a filler cap (17) to seal a filler opening (5) for that chamber. This enables a volume of fluid to be accommodated in a chamber of increased volume, thereby substantially eliminating the possibility of volume in excess of a given volume from overflowing from the chamber (2, 3). When the reservoir assembly is installed in a vehicle braking system of a brake-by-wire electro-hydraulic type (EMB) having a first power circuit (51), and a second back-up hydrostatic circuit (60), the one chamber (2) supplies fluid to the hydrostatic circuit, and the other chamber (3) supplies fluid to the power circuit.

Abstract: A reservoir including a housing having a chamber formed therein for the storage of hydraulic brake fluid. The chamber is in fluid communication with a master cylinder. The housing has an opening which is in communication with the atmosphere. The housing further including a passageway in communication with the cavity and the opening. A membrane is disposed in the passageway of the housing. The membrane has oleophobic properties such that the membrane permits the passage of air therethrough and substantially prevents the passage of brake fluid therethrough.

Abstract: An improved braking system includes a valving arrangement which permits reduction of deadband regardless of a randomly selectable piston home position or permits adjustment of the deadband. The system includes a fluid reservoir, a piston located in a cylinder including a reservoir port, a first fluid channel connecting the reservoir to the reservoir port, a brake actuator, and a second fluid channel connecting the cylinder to the brake actuator. The piston is moveable within the cylinder to produce fluid flow within the first channel. A first valve is disposed between the reservoir and the cylinder to prevent fluid flow from the cylinder to the reservoir when the piston is moved to pressurize fluid in the second fluid channel.

Abstract: In the master cylinder of the present invention, a cylindrical portion of a grommet seal includes at least two outer sealing projections on an outer circumferential surface thereof, an inner sealing projection on an inner circumferential surface thereof at a position corresponding to a recess between the outer sealing projections, and an abutting portion adapted to abut against a positioning stepped portion provided in a supply fitting of a reservoir. When the supply fitting is inserted into the grommet seal fitted in a boss of a cylinder body, deformation of the inner sealing projection is relieved by a cavity constituted by the recess between the outer sealing projections. When a hydraulic pressure is applied to the cylindrical portion of the grommet seal, because the abutting portion of the grommet seal abuts against the positioning stepped portion of the supply fitting of the reservoir, the cylindrical portion is axially compressed, so that sealability of the sealing projections can be improved.

Abstract: To provide a hydraulic master cylinder with inlet ports and outlet ports arranged in an angle to each other wherein the outlet ports can be on either side of the housing without the need of two different casts, the master cylinder according to the invention is equipped with either two sets of protrusions adapted to be machined into inlet ports or two sets of protrusions adapted to be machined into outlet ports. The two sets of identical protrusions are arranged symmetrically with respect to the one set of different protrusions. Thus, depending on the desired side of the outlet ports, only one set of the two sets of identical protrusions is machined while the other set remains an unmachined accumulation of material.

Abstract: The invention is directed to a hydraulic brake apparatus which includes a master cylinder having a cylinder body and a master piston slidably disposed therein for defining a pressure chamber ahead of the master piston and a power chamber behind the master piston. A control piston is slidably disposed in the cylinder body ahead of the master piston to define the pressure chamber behind the control piston, and adapted to be moved in response to movement of the master piston. An auxiliary pressure source is provided for pressurizing brake fluid to generate a power pressure, and a valve assembly is communicated with the auxiliary pressure source to regulate the power pressure into a regulated pressure in response to movement of the control piston. The valve assembly is adapted to supply the regulated pressure into the power chamber to assist the operation of a brake pedal.

Abstract: A master cylinder reservoir for use in an automotive vehicle includes a main body, a reserving chamber formed in the main body for storing operating fluid, a pouring opening provided at one end of the upper portion of the main body to permit introduction of the operating fluid into the reserving chamber, and a blocking device provided in the main body for preventing a leakage of the operating fluid outside the main body via the pouring opening.

Abstract: A tandem master cylinder with a bore (1a) for retaining primary (3) and secondary (4) pistons. The secondary piston (4) has a bearing surface (40) for retaining a ring (10) slideably located between a first spring (8) and a seal (4b). The ring (10) pushes the seal (4b) back against a shoulder (41) on the secondary piston (4) in order to transmit a compressive force to seal (4b). The intensity of the compressive force varies with the force exerted on and transmitted by spring (8). The secondary piston (4) has a stop piece (42) for limiting the sliding of the ring (10) in the direction of the second seal (4b) in the bore (1a) of the master cylinder resulting in better sliding of seal (4b) within bore (1a). The functional relationship between the stop piece (42) and second seal (4b) provided for a substantially total reduction of any pressure difference between the pressurized fluid supplied to a primary and secondary circuits supplied by the master cylinder.

Abstract: A master cylinder having a first housing with an axial bore therein which is connected to a second housing of a reservoir. The axial bore has a first replenishing port surrounded by a first boss and a second replenishing port surrounded by a second boss. A first radial bore in the first boss extends from the first replenishing port while a second radial bore in the second boss extends from the second replenishing port. First and second spigots which extends from the second housing are respectively located in the first and second radial bores to provide first and second flow communication paths from the reservoir to the axial bore.

Abstract: A brake master cylinder (10) for a hydraulic vehicle brake system has a master cylinder housing (32) and at least one pressure chamber (40) designed therein. Connected to the pressure chamber (40) is a hydraulic fluid reservoir which, furthermore, is provided for connection to a precharge pump of a brake pressure regulating system. Moreover, the brake master cylinder (10) has a hydraulic fluid return connection (30) which makes a fluid connection between the delivery side of the precharge pump, the reservoir and the at least one pressure chamber (40). A throttle (60) is arranged in this liquid connection, said throttle not impeding a hydraulic fluid stream out of the reservoir into the at least one pressure chamber (40) and throttling a hydraulic fluid stream from the return connection (30) into the reservoir. The throttle (60) makes it possible to cause the precharge pump to act on the at least one pressure chamber (40), without an electromagnetic valve being interposed.

Abstract: An object of the present invention is to provide a master cylinder which decreases the number of necessary parts, achieves easy assembly and stabilized quality, and surely prevents a float from coming off. In the present invention, the master cylinder tank 20 contains working fluid in the interior of a tank body 21 and incorporates a float 25 movable vertically in response to the increase and decrease in the working fluid by being guided by a float guide 22, and coming-off preventive portions 24, 24, capable of being deformed elastically, are provided to cover at least a part of the float 25 by extending a part of the float guide 22 upward beyond a guide rib 23. The coming-off preventive portions 24, 24 are formed by being bent to the inside into a shape such as to partially cover the float 25, so that the float 25 is prevented from coming off by the coming-off preventive portions 24, 24.

Abstract: The invention is directed to a hydraulic brake apparatus which includes a master cylinder having a cylinder body and a master piston slidably disposed therein for defining a pressure chamber ahead of the master piston and a power chamber behind the master piston. The master piston includes a first piston connected to a brake pedal and a second piston slidably disposed relative to the first piston. The rear ends of the first piston and second piston are exposed to the power chamber, and the front ends of the first piston and second piston are exposed to the pressure chamber. An engaging member is provided for engaging the second piston with the first piston upon forward movement of the second piston. A control piston is slidably disposed in the cylinder body ahead of the master piston to define the pressure chamber behind the control piston.

Abstract: A resinous cylinder comprises a cylindrical portion with an open end and a closed end, and is formed by flowing raw material of resin from the center of the closed end. A first attaching portion is disposed at the side of the open end of the cylindrical portion and has a hole for securing to a vehicle body. A flange portion has a second attaching portion disposed at the side of the closed end. The second attaching portion has a hole for securing the resinous cylinder to the vehicle body. A resin flowing portion is formed between the second attaching portion and the closed end of the cylindrical portion. A connecting portion connects the first attaching portion and the second attaching portion through a clearance with the cylindrical portion. A volume of the flange portion is reduced so that a resin flowing speed of the flange portion is faster than a resin flowing speed of the cylindrical portion.

Abstract: A two-stage brake valve includes a valve housing. The valve housing contains a chamber, one side of which serves as an equalizing reservoir which is connected directly or indirectly with at least one brake cylinder bore which is formed in the valve housing. The other side of the chamber forms an emergency steering volume for a hydrostatic steering circuit. A return line of the hydrostatic steering circuit opens into the chamber and an overflow opening communicates an upper region of the chamber through a channel to a fluid reservoir. To prevent foaming brake fluid from reaching the brake circuit, an intermediate wall separates the equalizing reservoir from the emergency steering volume. The equalizing reservoir and the emergency steering volume are connected to each other via an equalizing opening.

Abstract: An annular inward turned flange and a plurality of ribs are integrally molded on an inner peripheral surface of an cylindrical portion formed at an upper portion of a reservoir for a master cylinder. The ribs extend from a lower surface of the flange and are disposed in a distributed manner in a circumferential direction of the flange. An annular flat surface area is formed on an upper surface of the flange, and a tip end of a working oil filler is placed into close contact with the annular flat surface area. Thus, when a working oil is filled under pressure into the master cylinder and its output hydraulic pressure circuit through the reservoir by the working oil filler, the urging force from the working oil filler can be reliably supported, and the deformation of the reservoir by a filling pressure cannot be produced.

Abstract: A combination of a master cylinder and a fluid reservoir includes a master cylinder, a reservoir, and a pair of elastomeric seals between the master cylinder and the reservoir. The master cylinder has a first bore which defines a first reservoir seat and a second bore which defines a second reservoir seat. The first bore and the second bore are spaced a predetermined distance from each other. The master cylinder also has a rigid snap-in attachment seat disposed between the first bore and the second bore. The reservoir has a first cylindrical seating projection and a second cylindrical seating projection spaced the predetermined distance from the first seating projection. A snap-in attachment member is disposed between the first and second seating projections for alignment with and engagement with the snap-in attachment seat. The seals are disposed between each of the first bore and the first seating projection and the second bore and the second seating projection.

Abstract: A hydraulic master cylinder having a cylinder body (1) with a piston (3) slidable therein. The piston carries a sealing assembly (20) to permit pressurization of a pressure chamber (6) and fluid recuperation upon retraction of the piston. The sealing assembly includes a first seal (23) of relatively hard material slidable against the internal cylinder wall and a relatively resilient second seal (25) arranged to act between the sealing surfaces of the piston and the first seal to provide a fluid tight pressure seal during pressurization of the chamber.

Abstract: A master cylinder assembly including an elongated tubular shell defining a bore sized to slidably receive a piston, an opening at one of the shell for passage of a piston rod for driving engagement with the piston, a high pressure outlet proximate the other closed end of the shell for connection to a conduit connecting to a slave cylinder, and a shell fitting in the form of a socket formed in the closed end wall of the shell. The assembly further includes a spout defining a plug fitting at one end for coupling insertion into the socket of the shell and a fitting at its other end for connection to a hose for connection to a remote reservoir, and an integral reservoir structure including a main body bowl portion and a spout formed integral with the lower end of the bowl portion and defining a plug at its free end for insertion into the socket in the end wall of the shell.

Abstract: A dual acting master cylinder and reservoir assembly includes a pair of bayonets on the reservoir that are received within primary and secondary bosses of the master cylinder. The bayonets each include disks within their central openings wherein each disk has a control orifice for controlling the pressure rise in the associated primary and secondary braking circuits during the initial filling process of the master cylinder and reservoir assembly. Through means of the control orifices, the initial filling process of the braking system through the reservoir is effected while minimizing pressure differential establishment across the secondary piston.

Abstract: A brake booster with a master cylinder (10) comprises: a primary piston (12) and a secondary piston (14), with the secondary piston (14) being limited in its axial movability by a stop pin (25) being accepted transversely to a longitudinal axis (L) of the master cylinder (10) in a hole (24), and a reservoir (16) for brake fluid, comprising a connection (17) via which the reservoir (16) is connected with the master cylinder (10), with the connection (17) being arranged in the radial extension of the stop pin (25), with the connection (17) comprising a transverse web (28) in its flow cross sectional area which covers the hole 24 at least partially.

Abstract: A compliant master cylinder includes a primary piston and a secondary piston which are movable to provide fluid pressure to effect wheel braking in a vehicle. In addition, the master cylinder includes a compliant assembly which supplies conventional pedal feel and travel characteristics when the primary and secondary pistons are substantially immovable due to isolation the master cylinder from the wheel brakes. The compliant assembly includes a push rod piston that is movable against a selected amount of fluid pressure and spring force while the primary piston remains stationary. The fluid force is supplied by controlling the flow of fluid from behind the push rod piston through a flow restrictive orifice to a conventional fluid reservoir on the master cylinder assembly.

Abstract: A brake master cylinder assembly wherein a rod transmits forces acting on the master cylinder to the vehicle structure resulting in a master cylinder assembly with greater design flexibility. This permits forming the master cylinder body as an extrusion that is slidably received within a fluid reservoir.

Abstract: The present invention aims to provide a master cylinder reservoir in which the leakage of hydraulic fluid is prevented. To achieve the above object, in the master cylinder reservoir of the present invention in which a diaphragm is interposed between a cap and a body to define an upper chamber communicating with the outside and a lower chamber communicating with a reservoir chamber, and a slit is formed in the diaphragm so that the slit is opened by the deformation of diaphragm caused by the pressure difference acting on the upper and lower surfaces of the diaphragm, by which communication is permitted between the upper and lower chambers, a plate is disposed below the diaphragm in such a manner as to substantially cover the diaphragm, and a vent hole communicating between the upper and lower surfaces of the plate is provided.