Abstract: A brake master cylinder having a push rod including a body which includes resin material, a metal liner inserted within the body, a seal member disposed between the body and the metal liner, a piston slidably positioned within the metal liner and actuated by the push rod wherein the length of metal liner is slightly longer than the length of large diameter portion of the piston which is in contact with an inside wall of the metal liner plus a length defined by the range in stroke of the piston and a support member for securely holding the metal liner and limiting movement of the push rod.

Abstract: A vacuum brake booster is coupled to a master cylinder at the same time that an output member for the vacuum brake booster is adjusted relative to a piston for the master cylinder. The adjustment is carried out by a plunger adapted to activate a bonding material for bonding the plunger to the output member.

Abstract: A liquid cable transfer device is provided for transmitting input forces and/or displacements to corresponding output forces and/or displacements. The transfer device includes a section of tubing adapted to accommodate liquid under pressure, and terminal units attached to opposite ends of the tubing. Each unit includes a piston and a biasing element acting against the piston whereby the pistons of both units coact to maintain a certain minimum liquid pressure within the tubing. The piston displacement stroke within one terminal unit caused by either a pull or push input force being applied thereto is transmitted to the piston within the second terminal unit whereby the latter piston is displaced from its initial equilibrium position a predetermined amount.

Abstract: A method and apparatus which includes locating a compressible chamber filled with a non-compressible fluid confined in a closed circuit in the path of moving traffic so that the weight of the traffic passing over the chamber will affect a displacement of the incompressible fluid to create a fluid flow through the circuit. The circuit includes unidirectional flow control valves for directing the flow of displaced fluid through a fluid motor connected in circuit with the compressible chamber. Disposed in the circuit is a rectifier for rectifying the intermittent displacement of the fluid into a generally uniform fluid flow to affect the drive of the fluid motor with the output of the fluid motor being translated into useful work.

Abstract: Strong, light weight master cylinders for hydraulic braking systems are produced by incasing a section of steel tubing within a diecasting of metal such as an alloy of magnesium or aluminum. Master cylinders can thus be produced by diecasting the metal in situ around a seamless tube having a smooth accurately oversized bore so that it incases the exterior surface and extends over one end thereof and through predetermined shrinkage produces a final uniform bore diameter and operating surface. Tooling requirements are minimal, with little if any machining being needed following the diecasting operation. Unit production cost is thus lower than that of castings made with permanent molds. Light weight diecastable metals can thus be used in combination with strong but relatively thin steel tubing to provide durable master cylinders that are lighter, simpler and less expensive to make than cast iron cylinders. This composite construction can be used in power cylinders for numerous light weight applications.

Abstract: A tank valve apparatus particularly adapted for effecting rapid discharge of the liquid contents of a tanker truck or the like, the apparatus being characterized by an improved valve opening apparatus actuated by an air cylinder. The cylinder includes a single acting piston requiring a certain cylinder pressure to move the valve to its open position, but requiring a significantly lower pressure to permit its return stroke, whereby rapid closure of the tank valve is facilitated.

Abstract: A pneumatic control device for a displaceable member of an electric circuit, having a compressible air reservoir adapted and connected by a flexible conduit to an enclosure comprising the said movable member, and comprising three superposed rigid or semi-rigid members which are at least partially housed or enclosed one inside the other, and at least one member having a compressible wall and having an edge which is engaged and clamped between two of the superposed rigid or semi-rigid members; the first of said members together with the compressible walled member delimiting the air reservoir and being provided with a nozzle leading into an inner chamber which is delimited by the assembly of said three rigid or semi-rigid members; the second and third of said members delimiting a passage between them which connects the inner chamber to an annular outer chamber delimited by the second and the third rigid or semi-rigid members and open at its periphery; said flexible conduit being connected to the nozzle in the in

Abstract: An improved hydraulic master cylinder for use in a vehicle braking system wherein the housing of the master cylinder is formed of a material such as synthetic resin, aluminum alloy or the like and a cylindrical liner formed of corrosion-resistant and wear-proof metal is mounted in the housing to receive a piston slidably therein.

Abstract: The application discloses a foot actuated air or liquid dispensing means connected to a cylinder and piston rod for lifting the seat, so that the user will not have to soil his hands lifting the seat.

Abstract: A multi-directional positioner for moving one element relative to another element wherein a socket in a housing receives a ball with a rotating fit with a portion of the ball projecting outwardly of the socket and being connected to one element and the housing being connected to the other element. An arcuate groove in the socket extends in a plane passing generally through the center of the ball and receives a piston which is pivotally connected to the adjacent side of the ball. An arcuate groove in the outer surface of the ball extends in a plane passing generally through the center of the ball and perpendicular to the groove in the socket and receives a piston which is pivotally connected to the adjacent portion of the housing. Fluid is introduced under pressure selectively into the arcuate grooves in the ball and the arcuate groove in the socket to impart relative movement between the ball and the housing.

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: A servomotor having a metal backing plate for a diaphragm which separates the interior of a front shell and a rear shell into a front chamber and rear chamber. The metal backing plate is attached to a hub which extends through the rear shell. The hub has an axial bore with a first passageway which is connected to the front chamber and a second passageway which is connected to the rear chamber. A control means is retained in the axial bore by the metal backing plate being attached to the hub. When the control means is actuated, fluid under pressure enters the rear chamber and creates a pressure differential. The pressure differential develops a force across the diaphragm which is directly transmitted through the backing plate to an output push rod.

Abstract: The pistons, valves and failure warning switch mechanism contained within the bore of a master cylinder are preassembled in a container in kit form. The container provides for correct orientation of the parts in the master cylinder bore so that the failure warning switch actuating mechanism is properly aligned with the failure warning switch. The container is a tube of suitable material having a bore with the various internal parts of the master cylinder preassembled in it. Folding locating arms are attached near the forward end of the tube and normally held in a folded position by a cap and plug which closes the forward tube end. When the kit is ready to be used, the cap and plug are removed, the arms are unfolded, and the arm ends are aligned so that they extend through the bolt holes in the mounting ears of the master cylinder body. The tube bore is in alignment with the rear end of the master cylinder bore.

Abstract: A method and apparatus for producing useful work by utilizing the weight of moving traffic by incorporating in a roadway or traffic-way a readily deformable chamber which is filled with a fluid arranged so that the weight of a vehicle in passing thereof affects a displacement of the fluid therein. The energy of the displaced fluid in turn is translated into mechanical or electrical energy.

Abstract: A method of controlling the advance and retraction of a tool on a processing machine in dependence of mechanical properties of the workpiece which tool communicates hydraulically on one hand with a drive means and on the other hand via a shut-off member on by-passes, with a pressure converter, the closing or opening of the shut-off member taking place through electrical pulses of a pressure measuring element, the pressure produced during the flow of the pressure fluid through an adjusting valve being kept constant, increasing, or decreasing for respective time periods each, the setting of the adjusting valve being operated by a pressure control for producing constant increasing, or decreasing pressure, and the pressure produced by the pressure converter and causing the retraction of the tool starting immediately after completion of its advance and being kept uniform, and an apparatus for carrying out the method.

Abstract: A quick closing of a friction clutch for motor vehicles is provided by an arrangement where means acting in the same direction required for maintaining the clutch in the disengaged position are used to further close the clutch.

Abstract: A passageway forming a nozzle supplies a positive pressure impulse, derived from an oscillatory pressure source, to blades of a turbine mounted in a chamber. The passageway conducts fluid in a direction from the source toward blades of the turbine during a first portion of the oscillatory cycle while the pressure of the source exceeds the pressure of the fluid proximate the turbine. The fluid is directed by the nozzle in a concentrated stream toward the blades. During a second portion of the cycle while the source pressure is less than the fluid pressure proximate the turbine, fluid diffusely flows in the chamber away from proximate the turbine toward the source. The diffusely drawn fluid produces a negative pressure impulse on the turbine. The negative pressure impulse is substantially weaker than the positive impulse, whereby a net positive torque is exerted on the turbine to continuously drive the turbine in a positive rotational direction.

Abstract: A hand operated hydrostatic throttle & shut-off switch for remotely transmitting signals from a skier's hand to a power-driven ski's engine, comprising of a hand operated master cylinder, a slave cylinder for activating the throttle and a flexible coiled tube through which throttle control and shut-off signals are transmitted between the hand and the engine.

Abstract: Fluid within a pressure chamber is displaced and pressurized by reeling a flexible cable or filament into the pressure chamber. A movable piston or similar pressure-responsive member in fluid communication with the chamber is moved by the displacement of fluid in the chamber, so as to perform useful work. The flexible cable or filament is wound on a motor-driven reel located in the pressure chamber.

Abstract: A throttle actuator for accelerating and decelerating the speed of an internal combustion engine in response to work demand where the engine drives the pump of a hydraulic system. In one aspect, the invention is directed to a throttle actuating piston and rod arrangement for operating the throttle of the engine and a pulsation intensifier for sensitively controlling the piston's movement. The pulsation intensifier is connected in a pressure line from the pump and comprises a free spring biased floating piston of configuration such that there is a differential in area across the piston for fluid pressure intensification purposes. The intensifier piston in one embodiment also has an axial passage therethrough and an orifice communicating with the throttle actuating piston. Both pistons are slidably mounted in housings which have springs to normally position the pistons in directions to cause the engine to return to idle speed when there is no work demand.

Abstract: An intensifier for use with pressurized fluids requiring additional pressure boosting to assume higher presures includes an elongated housing with differential diameter internal bore of which large end is closed by a cap with fluid port therein and the opposite small end provided with an end wall having fluid passage therethrough, a differential diameter elongated piston of close sliding fit inside the bore having small plugging piston end at one end and a large actuating piston end at the other end with an intermediate diameter intensification piston therebetween and capable of being shuttled inside housing bore from first small piston end engaged position preventing pressurized fluid supply to the intensification chamber to the second small piston disengaged position allowing fluid supply thereto while simultaneously developing an evacuated annulus inside intensifier with a vacuum force tending to maintain piston in the first position and aiding in the operation of intensifier through an airless void when a