Abstract: A fluid pressure transducer device including first fluid pressure responsive means and second fluid pressure responsive means which together define a sealed volume of fluid. The first fluid pressure responsive means is exposed to first and second input fluid pressures and responsive to variations in one or both thereof to vary the volume of the sealed volume as a function of the first input fluid pressure modified by the pressure ratio of the second input fluid pressure to the first input fluid pressure. The second fluid pressure responsive means is responsive to the changes in the sealed volume of fluid and produces an output force signal in response thereto. There may be provided a variable volume chamber containing a temperature responsive element vented to the sealed volume of fluid to cause an increase or decrease in the sealed volume to compensate for temperature variations of the sealed volume of fluid.

Abstract: The invention relates to a master-cylinder having a two-part cylinder, one part being of narrower diameter than the other, and a two-part piston slidable in the cylinder. Two pressure chambers are defined by the cylinder and the piston. Advance of the piston reduces the volume of both. One, the high pressure chamber feeds an external pressure system, and is itself fed by the other chamber through a valve system during an initial phase of the piston stroke. In a later phase the feed from the second in the first chamber ceases and instead the second chamber feeds the fluid reservoir through a control valve. Pressure-transmitting means such as a rod is arranged between the high pressure chamber and the control valve to open the control valve when the pressure in the high pressure chamber exceeds a predetermined value.

Abstract: A disc brake of the type comprising a torque-taking member associated with an actuator is adapted to urge at least one friction element against a rotary disc. The friction element comprises a backing plate carrying a friction lining and anchors by its backing plate against guiding surfaces formed on the torque-taking member. An anti-noise spring cooperating with the friction element and with the torque member comprises a lock fixing the anti-noise spring axially with respect to the backing plate. A first portion of the spring traverses an aperture formed in the backing plate and cooperates with a second portion of the spring in such a way that the spring forms with the friction element a subassembly removable as a unit from the remainder of the brake.

Abstract: A solenoid operated distribution valve for supplying a servomotor in a trailer with a sway control braking signal in response to a sway signal being evaluated in a comparator. A wave spring surrounds the plunger of the solenoid to nullify the movement thereof such that the output force which operates the distribution valve is a direct function of the sway signal.

Abstract: The present invention relates in general to reducing the internal combustion engine exhaust emission polutants. More specifically, it relates to a control device that regulates the amount of exhaust gas being recirculated into the intake manifold of an internal combustion engine such that the exhaust gas recirculation flow is nearly proportional to engine air flow, and is a controlled function of intake manifold vacuum. The flow may be completely inhibited at low engine temperatures and also at times of low manifold vacuum and high engine air flow in order to maintain acceptable driveability.

Abstract: A muffler for absorbing the noise created by air flowing around a cylindrical body and into the interior thereof by maintaining a predetermined cross sectional area through which the air can freely flow.

Abstract: A disc brake for a two-wheeled vehicle, such as a motorcycle, is disclosed. The brake includes a torque member fastened to a non-rotative part of the vehicle, a two-piece caliper carried by the torque member, and a pair of pins carried by the caliper which slidably support a pair of friction elements adjacent opposed friction faces of a convention disc brake rotor. In one embodiment of the invention, the torque member is rigidly secured to the pins, a sliding connection being provided between the pins and the caliper to permit the latter to slide axially with respect to the rotor. Bolts are provided to hold the pieces of the caliper together. In the other embodiment of the invention, the torque member and the caliper are integral with one another, and the attachment between the torque member and the vehicle permits the brake to move axially with respect to the rotor. In this embodiment, the pins which slidably support the friction elements are bolts which also hold the two pieces of the caliper together.

Abstract: In a disc brake of the type in which at least one fluid pressure actuated piston is associated with a caliper to urge a first friction element directly onto a first friction face of the disc, the caliper being slidable by way of at least one column on a torque-taking member to urge by reaction a second friction element on to the other side of the disc, a locking connection is provided between the second friction element and the column to immobilize the column with respect to the caliper through a removable support connection provided between the second friction element and the caliper. The locking connection is preferably comprised of at least one extension of the backing plate of the second friction element, this extension being designed to fit into a corresponding slot in the at least one column.

Abstract: A solenoid valve is provided for controlling fluid communication in a passage defined between a first and a second orifices. A valve seat is defined in the passage and a valve member is adapted to be urged into contact with the valve seat to interrupt fluid communication between the first and second orifices. A coil and a fixed core control movement of the valve member in response to energization of the coil. The valve member is attached to a magnetized rod which is coaxial with the core. When the coil is not energized, the magnetized rod is normally attracted toward the fixed core in response to induced magnetization of the latter, to keep the valve member away from the valve seat. In response to energization of the coil, magnetization of the core is reversed and the rod 28 is repelled so that the attached valve member is urged into contact with the valve seat.

Abstract: A vehicle fluid pressure braking system is disclosed which includes brake-applying devices having separate service and parking actuators. Separate service and parking actuation circuits are provided to control actuation of the service and parking actuators, respectively. An interlocking valve is provided which prevents release of the parking actuator until a predetermined fluid pressure level is communicated to the service actuator. This interlocking valve prevents inadvertent release of the parking actuators, and also prevents release of the parking actuators in a situation in which a malfunction of the service braking circuit would render operation of the vehicle dangerous.

Abstract: A disc brake for a two-wheeled vehicle, such as a motorcycle, is disclosed. The brake includes a torque member fastened to a nonrotative part of the vehicle, a two-piece caliper carried by the torque member, and a pair of pins carried by the caliper which slidably support a pair of friction elements adjacent opposed friction faces of a convention disc brake rotor. The torque member is rigidly secured to the pins, a sliding connection being provided between the pins and the caliper to permit the latter to slide axially with respect to the rotor. Bolts are provided to hold the pieces of the caliper together. The pins which slidably support the friction elements are bolts which also hold the two pieces of the caliper together.

Abstract: An adjustable check valve for use in an oxygen regulator to establish limits at which a resiliently biased disc moves away from a seat to allow air to enter an atmospheric chamber. A regulator is connected to a linkage which operates an air flow valve and an oxygen proportioning flow valve. The regulator is responsive to inlet oxygen pressure such that a change in altitude causes a corresponding change in flow relationship of air through the air valve and oxygen through the oxygen valve.

Abstract: The invention relates to a failure detector for a dual hydraulic circuit such as a dual brake circuit in a motor vehicle. The detector comprises a movable piston assembly so as to define in a bore on opposite sides thereof two pressure chambers. Switch means are provided to make electrical contact when the movable assembly moves in certain direction from a central idle position due to pressure imbalance between the chambers. The movable assembly comprises a sleeve acting with the switch means and two resilient discs. The sleeve is mounted in a core fixed to a plug mounted in the bore and having the same axial length as the sleeve. The two discs are sealingly slidable along the bore and mounted in a fluid-tight manner on two axial projections attached to the opposite sides of the core and being smaller in diameter than the core.

Abstract: A rack and pinion steering gear for automotive vehicles includes a housing having a longitudinal bore in which the rack reciprocates and a cross bore in which the pinion which meshes with the rack is rotatably mounted. The rack is slidably mounted in the bore by an annular bearing, a portion of which is cut away to receive the pinion. A leaf spring is disposed in a groove provided in the wall of the bore and extending parallel thereto. The leaf spring bears against the side of the annular bearing member opposite the cut-away portion to thereby maintain the rack into meshing engagement with the pinion. The pinion is rotatably supported in the cross bore by a bearing arrangement which is designed so that substantially the same components may be used in either manual or power assisted steering gears.

Abstract: An annular rotor defined by a plurality of arcuate segments arranged in end to end relationship to form a friction disc. The arcuate segments are held in relatively loose annular formation by a retaining ring provided with opposite side plates fixedly secured thereto and between which radially extending projections of the arcuate segments extend. Ths side plates are provided with flange or tang portions which mate with recesses formed in opposite sides of the projections to thereby secure the segments to the ring in relatively loose formation to permit thermal expansion of the segments with minimal distortion thereof. If desired, the segments may each be provided with a recess in the unsecured peripheral edge thereof which recesses in aligned form provide a substantially continuous annular recess adapted to receive a flexible ring which, in turn, maintains alignment of the segments in a common plane.

Abstract: A speed sensor for an adaptive braking system is disclosed. The sensor is enclosed in a housing, so that all critical adjustments may be made at the time the sensor is manufactured and not when the sensor is installed on the vehicle. The entire sensor package is small enough to be mounted within the tubular axle used on many relatively large vehicles, such as semi-trailers, which are in use today. A driving connection is provided between the speed sensor and the hub cap of the vehicle, which of course, rotates with the corresponding vehicle wheel.

Abstract: An automatic brake adjust and reset device particularly adapted for use in a multiple disc aircraft disc brake and having one or more spring loaded axially movable tubular members engaged by a movable cutting member connected to and actuated by a brake applying pressure plate. A pair of spaced apart fixed stops operatively connected to the tubular member serve to limit axial movement thereof to a brake released position under the influence of the spring load thereon and to a brake applying position under the influence of the brake applying pressure plate connected to the cutting member. The tubular member is fixed at the brake applying position whereupon continued movement of the pressure plate and cutting member attached thereto results in cutting or slitting of the tubular member by the cutting member to the extent necessary to compensate for axial wear of the multiple brake discs.

Abstract: A correction mechanism for supplying an altimeter indicator with a rotational torque to compensate for the non-linear relationship between pressure altitude and barometric pressure. The correction mechanism has a first gear for receiving an input force and a second gear connected to the first gear. The second gear is eccentrically located on a shaft which connects a third gear with the altitude indicator. Because of the eccentricity of the second gear the line of action between the second gear and the first gear causes the shaft to rotate the third gear through a varying arcuate length for each tooth engagement.

Abstract: A device for use in an internal combustion engine for reducing emissions and for improving engine performance and economy having valve means for restricting air flow from the carburetor spark port to the vacuum advance cylinder at moderate acceleration to delay spark retard and for permitting unrestricted air flow at substantially full throttle acceleration to provide normal spark retard.

Abstract: A fluid pressure actuated piston is slidably carried in a fluid pressure actuated cylinder which, in turn, is slidably carried in a fixed carrier. Movement of the cylinder is resisted by a deformable tube frictionally engaged with a fixed circular member. A predetermined fluid pressure acting across a differential area wall portion of the cylinder generates a force overcoming the frictional resistance of the deformable tube engaged with the fixed circular member thereby advancing the cylinder in the direction of movement of the pressurized piston. The output force of the piston is substantially unaffected by the force imposed on the cylinder.