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: Methods of and apparatus for advancing a carriage utilize a displacement pump for displacing a selected quantity of fluid. The displacement pump is driven continuously by a motor to provide a series of fluid displacements which are accumulated in a hydraulic cylinder. A ram projecting from the hydraulic cylinder is coupled to the carriage and is advanced stepwise as the individual fluid displacements are accumulated in the hydraulic cylinder. The method and apparatus is especially useful for minimizing banding effects when advancing a carriage which supports a scanning device used in laser printers.

Abstract: In a master cylinder, a communicating passage is formed in a piston guide which is disposed in a cylinder housing so that the communication passage is in communication with the through hole in said piston guide for supplying oil, and an annular spacer is interposed between the annular seal disposed at the side of the piston guide and the piston guide, an annular spacer which has a plurality of projections protruding outward from the external surface at intervals, so that the annular spacer is positioned in the cylinder housing with the projections of the annular spacer abutting the internal surface of the cylinder housing, and an oil passage is formed between the external surface of the annular spacer excluding the projections and the internal surface of the cylinder housing.

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 self-bleeding, 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 means 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: A setting method for minimizing the closure travel of a central valve in a master cylinder is proposed, wherein, after the assembly of all internal parts except the stop (10), the internal parts having a position which corresponds to the inoperative position, the distance (y) between that end of the axial extension (12) which is on the actuating side and a fixed point is measured and wherein then, in dependence upon the measured distance (y) a stop (10) is chosen such that the desired closure travel (x) between the closing body (13) and the valve seat (14) of the central valve is established. By means of said method the closure travel of the central valve (x) is exactly adjustable irrespective of the tolerances of other component parts or a preceding power booster.

Abstract: A hydraulic pump comprises at least one alternating-cycle piston (20) having a suction phase and a delivery phase, and sliding in a fixed cylinder (22). The pump possesses in addition a nonreturn suction valve (32) placed between a source of fluid under low pressure (28) and a working chamber (30) defined in the cylinder, and a nonreturn delivery valve (34) placed between the working chamber (30) and an output chamber (16) for the fluid under high pressure, connected to an application circuit 10, 12). The output chamber (16) possesses a wall (40) which is movable as a function of the pressure which prevails in the output chamber (16), the movable wall (40) being capable of controlling the locking of the delivery valve (34) in an open position substantially during the greater part of the suction phase when the pressure in the output chamber (16) is greater than a given pressure, in such a way that the suction valve (32) stays closed in a corresponding manner.

Abstract: A gas cylinder control system for use with machine systems such as die stamping systems that includes at least one gaseous fluid cylinder associated with the machine system, gaseous intensifier control cylinder normally operated in timed relation to the gaseous cylinder and a passage providing communication between the gaseous cylinder and the gaseous intensifier control cylinder. The gaseous intensifier cylinder operates at substantially higher pressure than the die cylinder. A normally closed control valve is provided in the passage and is operable to open the passage in time relation to the operation of the machine system in order to apply the higher gaseous pressure of the gaseous intensifier cylinder to the gaseous cylinder and lock the gaseous cylinder and prevent it from moving until the control valve is actuated to close the passage thereby providing a predetermined time delay.

Abstract: A durable, frictionless remote controlled manipulator, which is compact, stable, easy to construct, and has good dynamic capability, is a cradle suspension of lever arms, joined by crossed spring hinges to form a parallelogram suspension. The suspension creates vertical motions that have minimal cross-coupled horizontal error. Vertical cross-coupling error that arises at the extremes of parallelogram displacement in the two horizontal axes is hydraulically corrected by the remote controller. Thus, displacements are more nearly mutually perpendicular, and the position of the microtool more faithfully corresponds to the micromter settings. Being compact, the device can be mounted on a microscope stage to minimize cantilevering of the microtool, which is an unwanted source of vibration and also limits the load bearing in larger devices that can only be placed alongside the microscope.

Abstract: A fluid transmission linear actuator having a chamber with a cylindrical boundary and a central axis. An output plunger has a head in the boundary. A neck is formed on the chamber with a passage entering it. An input plunger is axially movable in the neck. The input plunger and the ouput plunger are coaxial. A transmission capsule has a continuous skin forming a first reentrant fold between the output plunger and the boundary, and a second reentrant fold between the neck and the input plunger. A substantially incompressible fluid fills the capsule so that movement of either plunger results in proportional movement of the other plunger. This input plunger can be formed with an exponential surface so that its movement can result in a non-linear response, or in some circumstances can provide a linear output in response to a non-linear input.

Abstract: The assembly comprises a brake-booster and a master cylinder having, in an outer casing (10), a space divided in leakproof fashion into a front chamber (12) and a rear chamber (14) by a movable partition (16), at least a first resilient mechanism (18) tending to displace the movable partition towards the rear chamber. The front chamber is connected to a vacuum source, and a pressure difference is established between the front and rear chambers by a valve mechanism (20) capable of connecting the rear chamber to the atmosphere upon actuation of a control rod (22) in order to displace the movable partition towards the front chamber. A master cylinder (30) is fixed on the front wall of the casing and has a bore (40) in which a tappet (42) integral with the movable partition and delimiting an enclosed space (28) in the master cylinder slides in leakproof fashion. This tappet has a bore (32) in which a reaction piston (24) subjected to the pressure of the enclosed space (28) slides in leakproof fashion.

Abstract: A fluid circuit assembly for maintaining substantially constant pressure between two abutting solid objects, the circuit assembly comprising a master cylinder assembly, a plurality of working cylinder assemblies, piston rods extending from the working cylinder assemblies, a spool on distal ends of the piston rods adapted to engage a surface against which it is desired to maintain constant pressure, the master cylinder and the working cylinders having first chambers in communication with a first fluid circuit, the master cylinder having a second chamber in communication with a source of gas under a selected substantially constant pressure, said gas being in communication with a gas reservoir portion of a liquid/gas tank, a liquid reservoir portion of said tank being in communication with second chambers of said working cylinder assemblies, such that upon change of pressure on the spool by the surface, a reaction is generated in the circuit assembly, such as to move the spool to restore a selected pressure betw

Abstract: A hydraulic control apparatus, more particularly for operating a motor vehicle clutch release mechanism, comprising a master cylinder, a slave cylinder and a conduit connecting the master cylinder to the slave cylinder. The apparatus is in the form of separate modular units which are separately filled with hydraulic fluid, and the filled modular units are shipped unconnected to a user. Each modular unit is provided with a leakproof quick-connect connector member, through which filling of the modular unit may be effected, and which mates with a complementary leakproof quick-connect connector member of another modular unit, such that after installation on a utilization device, a motor vehicle for example, complementary connector members are reconnected, thus opening ports in each connector member placing each member in fluid communication with the other. Preferably, the two connector members are provided with a one-way locking arrangement preventing separation of the connector members after coupling.

Abstract: In order to avoid energy losses, particularly in the case of actuating operations characterized by energetic cycles, it is suggested to insert a double-lever cam-and-roller transmission mechanism between a hydraulic accumulator and a hydraulic pressure consumer which mechanism has the effect that the accumulator pressure and the consumer pressure are always balanced. The consumer is therefore actuatable by means of slight control forces, the energy used thus remaining at a minimum. Thus, only the slight actuating energy of the control forces and the unavoidable hysteresis loss of the system need to be compensated for.

Abstract: An end cap adapted to be inserted into one end of a hydraulic cylinder having a body of plastic material defining a bore open at one end thereof and an end wall at the other end thereof closing the bore. A cylindrical tube is positioned within the bore and a piston is reciprocal within the tube. The end cap sandwiches the tube between the end cap and the end wall and the end cap includes radially extending circumferentially spaced ribs which collapse against the tube as the end cap is inserted into the cylinder.

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: The hydraulic booster device for a brake circuit, comprises a body (30) pierced with a bore (32), in which slide coaxially a pusher (25) controlled by a brake pedal and a piston means (34) located between first (5) and second (33) chambers containing a brake fluid, the first chamber (5) receiving at least one spring (51, 52) which loads the pusher (25) and the piston means (34) away from one another, the first (5) and second (33) chambers being connected respectively to sources of fluid under low pressure (11) and under high pressure (13) by valve mechanism (15). An auxiliary chamber (4) of a volume variable as a function of the position of the pusher (25m), made in the bore (32), communicates with the first chamber (5), on the one hand permanently by way of a restriction (6) and on the other hand by an auxiliary valve mechanism (3) allowing communication during an increased in the volume of the auxiliary chamber (4) and preventing it during a reduction of the latter.

Abstract: A hydraulic actuator is formed by a first element incorporating a plurality of different sized piston cavities by a first set of piston elements which cooperate with a second set of piston elements and piston cavities respectively formed on a second element. Each of the cavities is selectively connected to a source of high pressure fluid or a source of low pressure fluid. The second element forms a driven piston in a cylinder formed by an extension of the first element. A second cylinder of a cross sectional area different from the first cylinder is hydrulically connected to the first cylinder and incorporates a second piston at its end remote from the first piston. The force or distance travelled by the second piston is correlated with that of the first or driven piston in a ratio equal to the ratio of the cross sectional areas of the two pistons. Preferably the second piston will be a double acting piston so that pressure may be applied to force the driven piston and first element together.

Abstract: The invention relates to an arrangement for automatic control of a hydraulically operated friction disc clutch with diaphragm spring. The hydraulic operating unit comprises a hydraulic cylinder which, by acting on the diaphragm spring, disengages the friction disc clutch. In order to obtain a hydraulic operating unit in which the regulating pressure is proportional to the disengagement degree of the clutch, the hydraulic cylinder comprises a proportionality-forming spring which acts against the hydraulic cylinder piston during the final part of the disengagement stroke of the piston. In a system with master cylinder and slave cylinder, where the slave cylinder acts on the diaphragm spring for disengagement of the friction disc clutch, the master cylinder is also provided with a pressure supply, compensating for wear of the discs, via a hydraulic channel which is closed off at a predetermined regulating pressure level.

Abstract: A hydraulic actuator is formed by an assembly including a first element, a cylinder, a body section and a chamber. The first element is provided with a first set of a plurality of different sized piston cavities and piston elements which cooperate with a second set of piston elements and piston cavities respectively formed on a second element. The second element forms a piston in cylinder. The body sides incorporates, preferably in symmetrical relationship around the axis, of the assembly a plurality of valves, one valve for each of the pairs of cooperating pistons and cavities. A piston divides the chamber into a high pressure reservoir and a low pressure reservoir with the piston being urged toward the high pressure reservoir to maintain a difference in pressure between the high and low pressure reservoirs.

Abstract: For a hydraulic actuation arrangement of a motor vehicle friction clutch a hydraulic cylinder is proposed of which the cylinder, displaceably receiving a piston (7), consists of a synthetic plastics material moulding (3) and a tube piece (5) of metal arranged in the moulding (3) and guiding the piston (7). The tube piece (5) is cut off from a semi-finished tube and guided with axial play, but with resilient initial stress, in the moulding (3). Seals (27, 49) arranged at the ends of the tube part (5) seal the tube part (5) off from the moulding (3).

Abstract: The brake system has an apparatus for traction control having a pressure generator. The pressure generator has a longitudinally displaceable cylinder for receiving brake fluid. The cylinder is connected by means of a valve to a pressure course between a master brake cylinder and a wheel brake cylinder. An actuating element is provided for closing and opening the pressure course to the master brake cylinder as a function of the cylinder position. The actuating element, extending coaxially between the cylinder and the valve comprises a tube and furnishes hydraulic communication between the cylinder and the valve. If excessive drive slip occurs, brake fluid can be positively displaced out of the cylinder by longitudinal displacement thereof, and brake pressure can be generated in the wheel brake cylinder. The actuating element assumes a piston function, which enables a structure of the cylinder having a smaller diameter and a long stroke. This makes for more accurate adjustment of the brake pressure.

Abstract: A process for the precise adjustment of the lost travel of a piston in a master cylinder. Master cylinders typically include a number of components in spatial series arrangement, with all components having individual tolerances. The individual tolerances regarding the lost travel of the piston or pistons, can combine additively in the master cylinder. The resulting lost travel, hence, is relatively large and varies with individual master cylinders. The process provides that the lost travel of the piston or pistons in the master cylinder can be precisely adjusted and, hence, can be kept very low. The position of the piston or pistons is measured in the condition in which they just seal the associated equilibrium ports. Subsequently, the position of the pistons is calculated in consideration of the desired lost travels and, by adjustment of the force planes acting on the desired point, the resting position of the piston and pistons, respectively, is fixed to the desired distance.

Abstract: A hydraulic control apparatus, more particularly for operating a motor vehicle clutch release mechanism, comprising a master cylinder, a slave cylinder and a conduit connecting the master cylinder to the slave cylinder. The apparatus is in the form of separate modular units which are separately filled with hydraulic fluid, and the filled modular units are shipped unconnected to a user. Each modular unit is provided with a leakproof quick-connect connector member, through which filling of the modular unit may be effected, and which mates with a complementary leakproof quick-connect connector member of another modular unit, such that after installation on a utilization device, a motor vehicle for example, complementary connector members are reconnected, thus opening ports in each connector member placing each member in fluid communication with the other. Preferably, the two connector members are provided with a one-way locking arrangement preventing separation of the connector members after coupling.

Abstract: This invention comprises four hydraulic muscle pumps connected to four hydraulic dynamic muscles in hermetically sealed pairs to transfer tensive forces from a local to a remote location for use in actuating the articulation section of a borescope or endoscope.

Abstract: A method is suggested for assembling a tandem master cylinder and a vacuum brake booster of a hydraulic brake system for automotive vehicles. Air is injected via the pressure connection (19) of the pressure chamber (18) associated with the push-rod piston (2). Simultaneously, the push-rod piston (2) is moved in the direction pointing away from the brake pedal. The pressure increase in pressure chamber (18) is measured during the movement of the push-rod piston and, thus, during the movement of the central valve (6) accommodated in the push-rod piston. As soon as the closure member (5) of the central valve is seated on the valve seat (4), thus the central valve being closed, the air pressure will increase in the chamber (18). In the curve of the "pressure-against-central-valve-travel" diagram, which curve indicates the pressure increase, a trigger point is established which determines a measured distance on the abscissa of the diagram.

Abstract: A plastic piston of master cylinder has a first member having a small diameter portion and a second member having a large bore portion. Excess welding resin is prevented from being leaked into a seal ring mounting groove formed on a part of the outer peripheral surface of the small diameter portion by provision of welding portions in the form of a space defined between an outer peripheral surface of the small diameter portion of the first member and the large bore portion of the second member, and a gap defined between a tip end of the small diameter portion of the first member and the bottom of the large bore portion, the space and gap being provided respectively for preventing the excess welding resin from being leaked into the seal ring mounting groove. The plastic piston has no parting lines along the seal ring mounting groove which results in achieving a superior seal effect.

Abstract: A dual chamber master cylinder has a center compensation valve for fluid compensation of the secondary pressurizing chamber, eliminating lip seal damage to the secondary pressurizing piston seal that can occur when a bypass port is provided in the wall of the secondary pressurizing chamber. Center compensation is accomplished through a passage connecting the secondary pressurizing chamber, under control of the compensation valve, to a common compensation chamber for both the primary and the secondary pressurizing chambers. In the preferred embodiment the common compensation chamber is the quick take-up chamber of the master cylinder. This provides quick take-up pressure to both pressurizing chambers upon initial master cylinder actuation.

Abstract: A self contained, self charging automatic hydraulic activation mechanism (AHAM) for a superconducting energy magnetic storage (SMES) system is disclosed. The AHAM is operatively coupled to arc activated switches disposed across a superconducting coil to automatically close the switches upon a coolant dump. The arc activated switches are also self actuating and close in response to arcing across the switch contacts or across spark gaps provided on the switches.

Abstract: A hydraulic control apparatus, more particularly for operating a motor vehicle clutch release mechanism, comprising a master cylinder, a slave cylinder and a conduit connecting the master cylinder to the slave cylinder. The apparatus is in the form of separate modular units which are separately, but simultaneously, filled with hydraulic fluid after simultaneous evacuation of atmospheric air from the apparatus modular units and test of the integrity of the modular units, and the pre-tested and prefilled modular units are shipped unconnected to a user.

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 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: Remote control of a micromanipulator employs laterally inextensible metal bellows, connected by flexible tubing of constant intermal diameter, in both the micromanipulator and the remote controller. Variations in the length of one bellows is communicated to the other bellows by variations in hydraulic volume, as opposed to variations in hydraulic pressure.

Abstract: A master cylinder comprising a cylinder body having a bore, a plunger in the bore, a bearing secured to the rear end of the cylinder body and slidably supporting the plunger, a sleeve fitted in the cylinder bore adjacent to the bearing and receiving the plunger therein, and stopper means between the sleeve and plunger for defining a retreat limit of the plunger, wherein the cylinder body is connected to a booster shell with a sealing member therebetween, and the rear end of the plunger protrudes into the booster shell for connection to an output rod of the booster, the sealing member having a lip placed in close contact with the outer peripheral surface of the plunger. An annular set screw is threadedly mounted to the rear opening of the cylinder bore to fix the sleeve while surrounding the plunger, so that the lip of the sealing member is received in a tool-engaging recess provided on the set screw. Alternatively, the plunger comprises a front plunger and a rear plunger.

Abstract: A pressure cylinder has a piston actuated by a force-input rod. An enlarged head of the rod is engaged by a washer and the assembly retained within the cylinder by a cup-shaped retainer press-fitted into the cylinder open end. An outer surface of the retainer is flush with the adjacent axially outermost surface of the cylinder and engages a support, to which the cylinder is fixed, in order to transmit to the support retraction forces sustained by the rod.

Abstract: In a method for transmitting force from one piston to another piston, a superplastic alloy is used between the pistons as a pressure transmitting medium. An apparatus adopting the method serves as a force multiplication apparatus.

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: A master cylinder for use in automotive hydraulic brake device has a pressure liquid chamber formed at one side of the larger diameter portion of the piston and a supply liquid chamber formed between the other side of the large diameter portion of the piston and a ring-shaped cup seal. The inner lip of the ring-shaped cup seal is integrally formed at its distal end with an annular projection coming into contact with a cup seal locking member, which is inserted in the large diameter portion of the cylinder and serves to prevent a movement of the ring-shaped cup seal towards the supply liquid chamber, so that the deformation of the inner lip is restrained.

Abstract: A first flexible vessel of a first cross section communicates with the rod and a second flexible vessel of a second cross section, different from the first cross section communicates with the first vessel. A substantially incompressible fluid is contained in the first and second vessels. Movement of a heated rod against the first expansible vessel moves liquid to the second expansible vessel, the differing cross section ensuring that the longitudinal movement of the second vessel is different from that of the rod.

Abstract: An adjustable rear view mirror, the mirror element of which is supported by a ball-and-socket-like joint, and can be adjusted by two elements that can be actuated by pressure medium. In order to use single-acting adjustment elements, a reset spring is associated with the two elements. This reset spring is disposed on an imaginary line that bisects the angle defined by the two adjustment elements and the ball-and-socket-like joint. This reset spring is expediently a compression spring that is disposed across from the two adjustment elements.

Abstract: A retainer assembly for use with an hydraulic clutch actuator of the type including a master cylinder and a slave cylinder in fluid communication with one another. The retainer assembly acts to maintain the output member of the slave cylinder in a retracted position during shipment, storage, and vehicular installation of the hydraulic actuator. The assembly includes a rupturable plastic strap having a control socket and connected as a harness over the end of the slave cylinder output rod. The assembly further includes a non-rupturable steel wire positioned over the socket portion of the plastic strap. The free ends of the wire are clipped around the mounting flange of the cylinder body.

Abstract: A manipulator usable for a glass electrode or the like comprises roughly moving mechanisms for roughly moving the glass electrode not only in the longitudinal and lateral directions but also in the heightwise direction, as well as a finely moving mechanism for finely moving the glass electrode in the longitudinal and lateral directions. It further comprises an operation lever, which is provided interiorly with a hydraulic cylinder capable of being pushed by a piston interlocking with an operation knob. A base member and a slider slidable in the heightwise direction relative thereto are incorporated into any one of the roughly moving mechanisms. Between the base member and the slider there are disposed a piston and a second hydraulic cylinder, said second hydraulic cylinder being connected to the hydraulic cylinder within the operation lever.

Abstract: A master cylinder includes a cylinder of one-piece construction made of a synthetic resin and including a cylinder body having an axial internal bore therein. At least one mounting flange extends perpendicular to an axis of the cylinder body, the mounting flange being adapted to be secured to a support structure to mount the master cylinder thereon. A plurality of ribs are formed integrally with and extends radially outwardly from the outer peripheral surface of the cylinder body in circumferentially spaced relation, the ribs also extending along the axis of the cylinder body. The mounting flange is connected to radial outer ends of the ribs. A piston received in the internal bore for sliding movement therealong.

Abstract: Improvement in a hydraulic control apparatus for actuating a remotely located mechanism having a shipping and installation restraining strap for an actuator having a housing and a linearly moveable output member projecting from the front end of the housing, the strap being non-elastic and rupturable and having a part thereof engageable with the free end of the output member and another part projecting rearwardly toward the rear end of the housing, the improvement comprising an elastic anchor arrangement for the restraining strap to allow full extension thereof without rupture thereof, a stop and positioning arrangement for the elastic anchor arrangement which predetermines the retracted position in which the output member is yieldably held, and an override arrangement to selectively debar functioning of the elastic anchor arrangement whenever it is intended to rupture the restraining strap.

Abstract: A sealing member for a master cylinder including outer and inner annular lip portions formed integrally on an annular base portion and an annular rib portion having a length greater than the lip portions.

Abstract: An assembly of a master brake cylinder and an associated power cylinder of larger diameter, disposed in front of the dashboard, is held together under tension by a stirrup-shaped retainer with a bight embracing the free end of the master cylinder and two legs anchored to the dashboard, these legs traversing the power cylinder. A roll membrane inside the power cylinder, forming a flexible partition that divides its interior into two chambers between which a pressure difference is developed to operate the master cylinder, has cuffs attached to two guide tubes rigid with at least one wall of the power cylinder, these tubes being traversed by the retainer legs.

Abstract: An assembly of a master brake cylinder and an associated power cylinder of larger diameter, disposed in front of the dashboard of an automotive vehicle with an extension traversing that dashboard, is held together by a flexible retainer such as a strap or a wire embracing the master cylinder and at least part of the outer periphery of the power cylinder under tension. The extremities of the retainer may be anchored directly to the dashboard and its center part is braced against the front end of the master cylinder by an adjustable tensioning device.

Abstract: The die-casting mold and the die-cast brake master cylinder housing comprise an axial master cylinder piston bore and a compensating bore, whose latter axis extends parallel to the axis of the master cylinder piston bore. The compensating bore has one end terminating in a compensating reservoir port oriented transversely relative to the housing's longitudinal axis and its other end terminating in a sealing chamber that is formed by an extension of the master cylinder piston bore. To render the casting process for manufacturing a die-cast brake master cylinder housing simpler, the mold comprises a core for the compensating bore whose longitudinal cross-sections containing the longitudinal axis are of conical construction, with the narrowest point being adjacent to the compensating reservoir port and whose cross-sections extending vertically to the longitudinal axis are of substantially reniform construction, while the concave sides of the cross-sections are close to the master cylinder piston bore.

Abstract: A disposable rupturable shipping and installation strap holding in a retracted position the output member of a linear actuator such as a pre-filled pre-bled hydraulic actuator. The strap has a retaining member fitted over the end of the actuator output member and a pair of symmetrically disposed strips or bands integrally formed with the retaining member and attached at their other end to a portion of the actuator housing. The strips or bands have portions of reduced strength which cause the strap to break and free the actuator output member upon first operation of the actuator. Preferably, the strap is molded of relatively thin flexible plastic.

Abstract: A master cylinder of resin material includes a cylinder having a receiving portion within which a piston is sealingly slidable, a cylindrical portion having a diameter which is larger than that of an outer periphery of the cylinder and coaxially rearwardly extending from the fore part of the receiving portion, and mounting flanges radially extending from a rearward end of the cylindrical portion. Each of the cylinder, the cylindrical portion and the mounting flanges are integrally formed.