Abstract: An arc-shaped flange 32 is provided protrusively on the peripheral surface at the top end of a filter 30, and guide ribs 33 extending downward are formed on the lower surface at both sides of the flange 32, so that the ribs 33 are slid in a cutout 12 formed in an annular rib 11 to guide the filter 30, and the cutout 12 is covered by the flange 32 when the filter 30 is put into a tank body 10.

Abstract: A hydraulic master cylinder and reservoir assembly having a master cylinder body with a fluid reservoir, and a master cylinder bore with a piston assembly sealingly reciprocal within the bore. The fluid reservoir has at least a portion thereof concentric with the master cylinder bore and is sealed from the atmosphere by a rolling diaphragm, which is sealingly slidable relative to an internal surface of the reservoir allowing the volume of fluid within the reservoir to expand or contract.

Abstract: Left and right two stage brake valves communicate fluid pressure to left and right brake mechanisms, each brake valve having an inlet for receiving pressurized brake fluid, a reservoir, a stepped bore and a stepped piston. The stepped bore and the stepped piston forming a high volume prefill chamber and a high pressure chamber. A prefill drain valve communicates the prefill chambers to the reservoir only when pump pressure is available at the inlet and blocks communication between the left and right prefill chambers and between the prefill chambers and a reservoir when pump pressure is not available at the inlet.

Abstract: An inlet union for master cylinder of the present invention is so constructed that a flange portion is disposed at the periphery of a duct member, a circular raised portion whose outside diameter is smaller than that of the flange portion is integrally formed, at least one convex portion protruding radially is disposed at the outer periphery of the circular raised portion, attaching holes for the duct members are disposed in the top plate of an attaching cover, a plurality of concave portions corresponding to the convex portion of circular raised portion of the flange portion are disposed at the inner periphery of the attaching hole so that the convex portion of the duct member selectively engages with the concave portion of the attaching cover, and a mounting portion is formed at the inner periphery of the attaching cover to mount the outer periphery of the flange portion.

Abstract: A fluid flow sensitive valve mechanism, including a valve member and a valve positioning device, positioned in a valve chamber between first and second inlet-outlet ports controls opening and closing of a third inlet-outlet port in response to flow of fluid to and from the valve chamber through two or more of the ports. The valve member has a planar platform section and a valve body section extending from one side of the planar platform section. The first inlet-outlet port connects with the valve chamber through a surface engageable by one end of a valve member planar platform section. Fluid flow impingement acts on various valve mechanism surfaces so that when fluid flows from the first port into the valve chamber the valve mechanism is moved to close the third port. It keeps the third port closed so long as there is thereafter no fluid flowing from the second or third port into the valve chamber.

Abstract: A cap which is so constructed that parts manufacture and product assembly are facilitated. The construction is such that a cap for a master cylinder reservoir connects a cover cap and a body cap with each other and a diaphragm is disposed in a space formed therebetween to provide a valve function. The cover cap has a concentric cylindrical portion and an annular protrusion, while the body cap has a funnel portion at its center and an annular disc portion at the periphery of the funnel portion. The diaphragm is fitted between the inner periphery of annular protrusion of the cover cap and the outer periphery of the funnel portion of the body cap. The diaphragm forms a suction valve and an exhaust valve together with the cylindrical portion and the annular disc portion, respectively.

Abstract: A brake system (10) having a master cylinder (14) connected to wheel brakes (24, 26) of a vehicle through remote compensation valves (20, 22). The master cylinder (14) has a two piece housing (66, 84) with a bore (74, 86) therein. First (32) and second (34) pistons are located in the bore (74, 96) by a sleeve and bearing arrangement (98, 82). Return springs (104, 110) in the bore (74, 96) position the first (32) and second (34) piston to define first (106) and second (114) chambers in the master cylinder (14). The two piece housing has first (22) and second (90) flanges that are joined together by hook (94, 94', 94", 94'") and slots (73, 73', 73", 73'") to form a unitary structure and by bolts (47, 47') which further compress seals (102) by joining the first flange (72) to a brake booster (12) to assure that the bore (114) is sealed from the surrounding environment.

Abstract: A master cylinder having first and second compensating ports with a plurality of openings therein for rapidly allowing fluid communication between a reservoir and first and second chambers to maintain the master cylinder in a ready condition with respect to an input force in the development of pressurized fluid to effect a brake application.

Abstract: The master cylinder comprises a body 10 formed with a bore 13, a piston 19 slidable in the bore to discharge hydraulic working fluid from the bore and an annular reservoir 17 for communication with the bore 13 and which is concentric with the bore. The reservoir contains a flexible diaphragm 30 which separate fluid in the reservoir 17 from ambient air. The use of the concentric reservoir 17 and diaphragm 30 makes the master cylinder particulary compact and suitable for use in a pre-filled clutch release system of a vehicle.

Abstract: A cartridge for selectively permitting flow from a master cylinder includes a cartridge body formed with an axial passage extending from a first end to a second end of the cartridge body. A cartridge stem is disposed in the axial passage and is movable in the axial passage between a closed position, in which the cartridge stem blocks flow between the first and second ends of the cartridge body, and an open position, in which the cartridge stem permits flow between the first and second ends of the cartridge body. A method for installing a master cylinder assembly, the master cylinder assembly including a master cylinder provided with a cartridge, in a fluid pressure control system is also disclosed.

Abstract: The present invention is directed to a cap assembly for screwing into an opening of a reservoir for storing a fluid therein. Around the cap, formed is a sealing groove in which a sealing member is disposed. The sealing member has a sealing portion which extends toward the inner periphery of the opening, and a pair of contacting portions which extend axially toward each inner side of the sealing groove in spaced relationship with each inner side of the sealing groove by a predetermined clearance respectively. The sealing member is formed around the periphery thereof with grooves for allowing the sealing portion and contacting portions to be deflected in response to a sliding motion of the sealing member when the cap assembly is screwed into the opening.

Abstract: A hydraulic pressure actuating system has a master cylinder pivotally mounted to the dash panel in line with the actuator pedal, a remotely mounted hydraulic fluid reservoir assembly positioned at the high point of the system for selfbleeding, and an actuating device actuated by pressurized fluid generated by actuation of the master cylinder. The reservoir assembly uses a fluid flow valve mechanism to control its connection with the fluid passage of the system. Several types of reservoirs are disclosed, including a siphon tube arrangement and various flexible bag arrangements. The reservoir volume is contained in minimum space by using a sidesaddle reservoir arrangement. Indicator arrangements are also disclosed which when actuated indicate actuation and release of the master cylinder in one instance and the amount of fluid in a flexible bag reservoir in another instance.

Abstract: In a master cylinder and booster assembly for a vehicle hydraulic system, the booster has a housing provided with a bore, an inlet connected to a source of hydraulic pressure, and an outlet connected to a booster reservoir, input and boost pistons working in the bore and a boost chamber for pressurization by fluid from the source, under the control of valve means, to actuate the boost piston which in turn actuates the master cylinder. The booster has a permanent connection between the boost chamber and the outlet and a connection between the source and the boost chamber which is closed when the booster is inoperative and open during operation. In order to provide a supply of fluid for a master cylinder reservoir, the booster has a feed passage leading from the bore to the master cylinder reservoir and an overflow passage leading from that reservoir to the outlet.

Abstract: A master cylinder includes a second piston that is provided with a hollow portion. The hollow portion includes a yoke portion for receiving an end of the second return spring, a cylindrical portion having a diameter that is larger than the diameter of the second return spring, and a tapered portion located at the open end of the hollow portion. The second return spring is disposed within the yoke portion so that the second return spring is coaxially arranged with respect to the second piston. Thus, although the second return spring is capable of moving rapidly to and fro within the hollow portion, the construction of the second piston and the arrangement of the second return spring within the hollow portion of the second piston helps avoid interference between the second piston and the second return spring. Thus, unpleasant noise can be reduced or eliminated. Moreover, small particles that would normally result when the second return spring scratches the second piston are not as likely to arise.

Abstract: A caging arrangement for limiting the extension of springs in a bore. The caging arrangement includes cylindrical members which are connected to pistons in a master cylinder. The cylindrical members which are joined to the pistons and communicates the force of piston return springs to urge the pistons toward a rest positions while a valve return springs retained by the cylindrical members urges valves toward stops to control fluid communication between a reservoir and pressure chambers associated with the pistons.

Abstract: A cap for a reservoir of a master cylinder having a disc member with a plurality of perpendicular guides located on a fixed radius from the center of the disc member for aligning a cylindrical body secured thereto. The cylindrical body has an annular flange with a tapered peripheral surface thereon extending from an edge of a shoulder formed adjacent the annular flange. A diaphragm has an annular base connected to an apex section by a first conical leg and a center section connected to the apex section by a second conical leg. The diaphragm has a plurality of ribs that engage the disc member when an annular lip is located on a shoulder of the cylindrical body.

Abstract: A master cylinder assembly in which the plastic reservoir has mounting tubes fitting about mounting bosses or into recesses of mounting bosses of a master cylinder body. The tube outer ends have elastic seals integrally formed thereon which engage a wall surface of the mounting bosses in sealing relation. The seals may be lip type or O-ring type seals.

Abstract: A semi-active suspension system having a linear actuator operatively connected between a sprung mass and an unsprung mass of the vehicle for each corner of the vehicle. An accumulator connected to the actuator through an electrically controlled valve. An actuatable fluid RAM is in fluid communication with the accumulator for controlling fluid pressure in the accumulator. A hydraulic ram driver is operatively connected to the RAM. A sensor senses force inputs to the vehicle. A controller controls (i) the ram driver for pressurizing the accumulator to a desired fluid pressure, and (ii) the electrically controlled valve in response to sensed force input so as to effect a fluid pressure change in the actuator. Each fluid RAM includes a hydraulic motor having a housing and a piston slidably mounted in the housing.

Abstract: The actuator comprises a clutch pedal lever (12) which is pivotally connected to a support (17). The pedal is integral with a cylinder (18) having a piston (20) therein which is connected to a hollow pushrod (28). The pushrod is also pivotally connected to the mounting (17). Pivoting movement of the pedal (12) causes the cylinder (18) to move relative to the piston so that fluid within the cylinder will operate a slave cylinder (44). The clutch and pushrod have spaced axes of pivoting (13a, 14a) and the piston (20) is shaped to permit a degree of tilting to take place between the piston and the cylinder. The system also includes a reservoir which can communicate with the cylinder when the piston occupies a particular position in the cylinder.

Abstract: A preassembled, prefilled hydraulic actuator apparatus for a motor vehicle clutch and adapted for connection to a non-integral fluid reservoir. The apparatus comprises a master cylinder having a supply inlet and a working pressure outlet, a slave cylinder having an inlet, a working pressure conduit interconnecting the outlet of the master cylinder and the inlet of the slave cylinder, and a low-pressure supply conduit for connection to a reservoir. In one embodiment, the supply conduit is connected at one end to the master cylinder inlet and the free end of the supply conduit is sealed by a bung partition, a piercing coupling is provided on the free end of the supply conduit, and the coupling is connected to an outlet fitting on a prefilled reservoir which may also serve as the hydraulic fluid source for the brake system of the vehicle.

Abstract: A tandem master brake cylinder has first and second pistons, each piston associated with a fluid chamber and a pressure chamber. The pistons are displaced in response to actuation of a brake pedal. A hydraulic booster is coupled to a power source and is operable to enhance the piston movement and for conducting pressurized fluid to a second of the fluid chambers associated with a second piston to displace that piston in a manner reducing the volume of the pressure chamber associated with the first piston. In the event that a negative pressure is communicated with the second fluid chamber, e.g. by a loss of pressurized fluid from the power source, brake fluid is supplied through a one-way check valve to the second fluid chamber to prevent the negative pressure from reversing the motion of the second piston.

Abstract: An actuator/coupler having concealed rollers between forward coupler attaching to the towing vehicle and rear housing connected to trailer. Forward rollers bear on the underside of the top wall of the rear housing. The rear rollers bear on the underside of the top wall of the coupler. A hydraulic cylinder block is counterbored and the rear rollers have annular extensions fitting into the counterbores for roller support during assembly. Rests are provided under front rollers for roller support during assembly. A piston rod in the hydraulic cylinder extending forwardly through a pivotal latching wall having a clutching opening normally only letting the piston rod move rearwardly and locking against forward movement and a spring pressing the latching wall to locking position.

Abstract: In a hydraulic reservoir of a master cylinder for vehicle including: a main body having an internal space for storing brake fluid; a float provided with permanent magnet, so arranged as to be vertically movable in the internal space of the main body; a reed switch attached to the outside surface of the main body, the reed switch being actuated by magnetic force of the permanent magnet, when the float with permanent magnet is positioned under a predetermined level; and a hollow for attaching the reed switch to the outside surface of the main body, the reed switch is supported by a support member in the hollow, a rubber bush is tightly and elastically fitted to the inside wall of the hollow and a fixing member is so fitted to the hollow as to push the rubber bush to the support means, terminals of the reed switch being inserted tightly through holes of the rubber bush whereby the reed switch is held in the hollow.

Abstract: The assembly is composed of a vacuum pneumatic booster (1), a master cylinder (3) and a reservoir (5) of fluid under low pressure which feeds the master cylinder, and is intended to convert a force exerted on a control pedal into a fluid pressure supplying at least one fluid motor. The booster (1) has at least one chamber connected to a vacuum source via a non-return valve (30). This chamber is connected to the source via a duct (21) formed in the master cylinder (3), the non-return valve (30) being arranged at the outlet of the duct (21). The non-return valve (30) is arranged at the end of a pipe (25), the other end of which is connected in a sealed manner to the duct (21), the non-return valve (30) and the pipe (25) being incorporated into the reservoir (5).

Abstract: A brake master cylinder reservoir diaphragm has a vent slit therein to operate as a vent valve to equalize air pressure when a pressure differential is impressed across the diaphragm as the brake fluid level in the reservoir changes. The vent slit has an omega or bell curve shape so that the movable valve member is the tongue-like part formed on the inner curvilinear part of the curved vent slit. The tongue valve member acts as a cantilever supported valve which bends at its base to open in either direction under a differential pressure acting on one side or the other of the diaphragm. The opening and closing action of the tongue valve member can be fine tuned by modifying the bending resistance of the base of that member. Such modifications can include a partial base slit extending only part way into the thickness of the base to form a groove in alignment with the straight ends of the omega slit and located between them.

Abstract: The master cylinder (10) comprises a front or first housing part (12) which is generally U-shaped and a second or rear housing part (14) which is also generally U-shaped, the second housing part (14) being received within an end opening of the first housing part (12). The second housing part (14) has an end opening (16) opposite the first housing part (12) through which a first piston (18) is received. The first piston (18) and a second piston (22) are biased by respective resilient mechanisms (20, 24) disposed within a bore (26) defined by the parts (12, 14). Captured between the first and second housing parts (12, 14) are first and second interface members (80, 90) which have seals insert molded thereon. The first and second housing parts (12, 14) are held together by self-threading screws (100) such that a predetermined clamp load is imposed upon the interface members (80, 90). The master cylinder (10) has outlets (34, 36) all of which are oriented longitudinally toward the fron of the master cylinder.

Abstract: A fluid flow sensitive valve mechanism is positioned in a valve chamber between first and second inlet-outlet ports and controls the opening and closing of a third inlet-outlet port in response to the flow of fluid to and from the valve chamber through two or more of the ports. The valve mechanism includes a valve member and a valve positioning device. The inpingement of fluid flow acts on various surfaces of the valve mechanism so that (1) when fluid flows from the first port into the valve chamber the valve mechanism is move to close the third port and to keep the third port closed so long as there is thereafter no fluid flowing from the second or third port into the valve chambr, and (2) when fluid flows through the first port from the valve chamber, whether from the second port or the third port or both, the valve mechanism is moved to open the third port.

Abstract: A dipstick in the brake fluid reservoir of a brake system of the type having one or more pistons carrying a seal of elastomeric material subject to swelling upon exposure to the presence of a foreign fluid other than brake fluid. A piece of elastomeric material of the same type as the elastomeric material of the piston seal is mounted on the dip stick at a level thereon to be consistently submerged in the brake fluid whereby the presence of the seal swelling foreign fluid in the brake fluid reservoir will be detectable by examination of the piece of elastomeric material upon removal of the dip stick from the reservoir.

Abstract: A master cylinder reservoir is provided with flexible arms adapted to snap-engage with a retaining formation on a pressure cylinder, the arms lying generally parallel to a spigot of the reservoir received within a socket of the cylinder. A seal is provided between opposed surfaces of the spigot and socket.

Abstract: A hydraulic pressure generator comprises a body in which is formed a bore, at least one piston mounted slidably in the bore, an annular sealing mechanism located in the bore, and the piston being slidable from a rest position during operation of the generator to cooperate with the sealing mechanism and divide the bore into a working chamber connectable by an output passage to a hydraulic actuator. A refill passage is connected to a source of hydraulic fluid. The output passage is formed in part between a first surface fixed in the bore and a second surface formed on a member mounted in the bore.

Abstract: A method and apparatus for filling a hydraulic control apparatus of the type including a reservoir, a diaphragm positioned in the reservoir, a master cylinder, a slave cylinder, and a conduit interconnecting the master cylinder and the slave cylinder. The apparatus is filled by the use of a filling head which is fitted into the open top of the reservoir and which includes a nozzle portion having an exterior surface enclosing a volume which approximates the volume of the diaphragm so that, following filling of the apparatus, removal of the filling head, and reinsertion of the diaphragm, the apparatus is automatically placed in a totally filled condition.

Abstract: A tandem master cylinder for a hydraulic brake unit with slip control. In the housing of the brake unit a primary piston pre-loaded by a first return spring and a secondary piston pre-loaded by a second return spring define a primary and a secondary pressure chamber within a longitudinal bore. The pressure chambers are connected to a fluid reservoir and are associated with a first and a second control valve which release or shut off a second connection between the pressure chambers and the fluid reservoir depending on an actuating force. In order to reduce the overall axial length of the tandem master cylinder, the control valves (10, 11) are arranged outside the pistons (6, 7) and are actuated linearly by the pistons (6, 7).

Abstract: Main brake cylinder (1) with brake fluid container (6). A valve (10) is arranged in the connection between the container and the interior of the cylinder. If the container becomes detached from the cylinder, the valve is closed automatically and prevents brake fluid from running out.

Abstract: A master cylinder assembly especially adapted for mounting in the passenger compartment of a motor vehicle in association with the clutch pedal assembly of the motor vehicle. The unit is permanently sealed and is non-serviceable so that no fluid leakage occurs in the passenger compartment as a result of attempts to service the unit. The master cylinder assembly includes a cylinder having an open rearward end and a closed forward end, an external mounting flange intermediate the ends, and an elongated reservoir mounted in piggyback fashion on the cylinder between the mounting flange and the forward end of the cylinder with the rear end of the reservoir pivotally secured to the mounting flange and with a discharge fitting on the forward end of the reservoir moving into telescopic sealing relation with a reservoir fitting on the forward end of the cylinder in response to pivotal movement of the rear end of the cylinder about the pivot axis defined between the rear end of the reservoir and the mounting flange.

Abstract: An improved fluid transformer which is capable of controlling the position of the operating pistons within the apparatus so that pressure equilibrium is maintained and the movements of the pistons are limited to predetermined locations within the cylinders. The transformer is capable of operating in a contaminated environment by purging unwanted fluid contamination from the internal workings of the transformer. Dynamic piston and cylinder seals are positioned such that destructive pressure forces are counteracted by opposite frictional forces during operation, thereby allowing the seals to remain effective at high pressures for long periods of time.

Abstract: A fabricated master cylinder having a reservoir part and in interlocked cylinder part defining a cylinder bore and which a slidable piston is supported. The reservoir part that extends into the cylinder bore defines a shoulder that cooperates with a recuperation valve for forming an actuating stop for holding the makeup fluid recuperation valve in an opened position when the piston is at its at rest position.

Abstract: A hydraulic master cylinder assembly of the type including a reservoir in which a diaphragm is disposed to divide the reservoir chamber into a hydraulic fluid chamber outside of the diaphragm and in communication with the pressure chamber of the master cylinder and a gas chamber within the diaphragm. The diaphragm is generally tubular with an open end and a closed end, and in a cross section transverse to the central axis of the diaphragm, includes a plurality of radially extending arms arranged about the central axis of the diaphragm and each including a pair of side walls defining therebetween a portion of the volume of the gas chamber. The diaphragm is movable between an expanded condition in which it assumes a substantially circular configuration in cross section and a collapsed condition in which each of the pairs of side walls of the arms are collapsed with respect to each other to reduce the volume of the chamber.

Abstract: A connection for press fitting and securing together a reservoir (40) to a master cylinder housing (10) comprises a master cylinder housing extension (12) having an end (14) with an exterior abutment (16) and an enlarged interior diameter section (20) which provides a shoulder (22). An annular seal (30) is received within the enlarged interior diameter section (20) with a flat edge (34) of the seal (30) engaging the shoulder (22) and extending radially inwardly relative to the housing extension (12). A retainer member (50) is annular shaped and includes a horizontal portion (52) with a central opening (54), the horizontal portion (52) extending into a substantially orthogonally disposed side portion (56) that has a plurality of curved fingers (58). The retainer member (50) is snap fitted over end (14) of the housing extension (12) so that the fingers (58) resiliently engage the exterior abutment (16) and the horizontal portion ( 52) retains the seal (30) within the enlarged interior diameter section (20).

Abstract: A hydraulic master cylinder piston carries a circumferential seal ring which allows recuperation flow valving. The floating seal has a reinforcing metal girdle which prevents radial expansion and axial crushing. The seal material resists extrusion and has an outer radius slightly greater than the radius of the circumferential girdle. A forward slotted bearing ring maintains the piston in alignment with the bore. During piston return, recuperation occurs through a path comprising the radial clearance between piston and floating seal ring and at least one slot or groove in the bearing ring. Upon full piston return, the seal is withdrawn from the master cylinder working chamber into a larger diameter bore communicating with the reservoir and thus allows relatively free make-up flow.

Abstract: A portless-type master cylinder for use in an automotive fluid brake system has a supporting means which resiliently supports the end of a piston adjacent to a push rod so as to preserve a predetermined gap between the end of a valve rod and a stopper member when the master cylinder is not operating. With this arrangement, the wasteful stroke is minimized and the impact at the time of start-up of the master cylinder is reduced.

Abstract: A tandem master cylinder has a housing containing two pressure chambers for connection to separate braking circuits. A pressure piston component forms pistons movable in the pressure chambers to supply fluid under pressure to the circuits. A balance piston has opposed surfaces subject to the pressures respectively in the chambers and is movable, in response to a pressure difference between the chambers, to reduce the pressure difference. Control valves operate in response to brake actuating movement of the piston component normally to isolate the chambers from a fluid supply reservoir, and a disabling device disables the respective control valves individually to prevent pressurization of one of the chambers when actuation of one brake only is required.

Abstract: A hydraulic actuator assembly of the type including a hydraulic system comprising a master cylinder, a slave cylinder, and a conduit interconnecting the master and slave cylinder. One-way valve means are provided, either mounted on the master cylinder or interposed in the conduit interconnecting the master and slave cylinders, and these valve means function to block communication between the system and the associated reservoir when the system if pressurized but allow flow of replenishing fluid from the reservoir into the system when the system is depressurized to compensate for system losses and wear in the associated vehicular mechanism. The valve further includes a manual override member in the form of a plunger which is manually depressed and which moves a valving member of the valve to a position in which it establishes communication between the reservoir port and the system port so that fluid may be moved from the system and into the reservoir even when the system is pressurized.

Abstract: The brake system in-line fast fill valve (10) of the present invention comprises a valve housing (12) which may be threadably inserted within the body of a master cylinder so that an inlet (28) at one end of the fast fill valve (10) communicates with an outlet (39) from a pressure chamber (33) of the master cylinder (30). The valve housing (12) includes a stepped bore (22) having a differential area fast fill piston (40) receiving slidably therein a poppet piston (60). A first seal (50) is disposed about a reduced diameter portion (46) of the fast fill piston (40) and axially opposite a second seal (52) disposed at an enlarged diameter end (48) of the fast fill piston (40).

Abstract: A master cylinder for a vehicle braking system comprises a body (2) with a bore (3) open at the rear end of the body, a reservoir (4), a transverse port (17) in the body opening into the bore (3) and positioned rearwardly of the reservoir, and a passageway defined between the exterior of the body (2) and a sleeve (22) mounted thereon to communicate the transverse port (17) with a chamber (7) of the reservoir. in different disclosed embodiments the sleeve may be integral with the housing of a booster assembled with the master cylinder and an element may be interposed between the sleeve and the master cylinder body and be provided with a tubular extension interconnecting the reservoir with the passageway.

Abstract: A master cylinder has a pressure cylinder and an outwardly projecting mounting flange mounted thereon by arms extending longitudinally of the cylinder in spaced relationship therewith and being connected to the cylinder at locations remote from the flange outside the area swept by seals carried by a piston. The cylinder, flange and arms are formed as an integral plastics molding.

Abstract: A master cylinder includes a pressure cylinder and a pressure-generating piston movable therein. The cylinder is closely surrounded over part of its length by a separate reinforcing member in the form of a sleeve which acts to prevent significant expansion of the cylinder under the effect of internally applied pressure. In the example shown, the pressure cylinder forms part of an integral moulding which includes a fluid reservoir.

Abstract: An inlet assembly for a brake master cylinder includes an inlet member made of synthetic resin installed in the cylinder body of the master cylinder which has at least two inlet portions and one outlet portion positioned between the inlet portions at the same side. The master cylinder is connected through the inlet portion to a hose communicating with a reservoir installed in a vehicle body. The inlet member includes a first member integrally formed of a first tubular portion on a cylinder body side of the inlet member which is fitted into an inlet portion of cylinder body, a second tubular portion for operative engagement with the hose, and a second member having a mounting portion for mounting on the cylinder body by apparatus for positioning the inlet member on the cylinder body and an opening portion which is fitted by a boss portion surrounding the outlet portion of cylinder body.

Abstract: A tandem master cylinder includes a pair of separately molded plastic cylinder half portions joined together. Each contains a pressure chamber and a piston of the tandem circuit. Coaxial cylindrical bodies surround the cylinder portions, each joining to its respective cylinder portion at a location axially beyond the limits of inward axial travel along the cylinder of seals carried by the pistons so as to account for any differential shrinkage in molding. The cylindrical bodies interconnect at their ends to form a sealed joint locating the cylinder halves in correct radial and axial alignment. Reinforcement members around the cylinder halves resist expansion from internal pressure.

Abstract: A hydraulic apparatus for remotely controlling the operative mode selector of a motor vehicle automatic transmission. The apparatus comprises a master cylinder having an input member operatively connected to the transmission operative mode selection or shift lever placed at the disposal of the motor vehicle operator, and a slave cylinder mounted on or proximate the transmission casing and having an output member connected to the transmission operative mode selector, the master cylinder and the slave cylinder being placed in fluid communication through flexible conduits such that each displacement of the master cylinder piston as a result of displacement of the master cylinder input member causes a corresponding displacement of the slave cylinder piston coupled to the slave cylinder output member.

Abstract: A modular structure for a hydraulic cylinder permitting the cylinder to be used in combination with a reservoir of hydraulic fluid either installed on the cylinder itself or at a remote location with a conduit connection to the cylinder. The cylinder is provided with a peripherally threaded portion over which a tubular member formed integral with the reservoir, or in the alternative, provided with a connector for connection of the cylinder to a remotely located reservoir is fitted. The tubular member-fluid reservoir assembly and the tubular member-connector assembly are interchangeable.