Abstract: A positive displacement pump for a vehicle power steering system comprising a rotor (42) rotatable in and cooperating with a stator (20) to define a pump cavity (52), (54), inlet and outlet ports (56), (58) and (34), (36) communicating with the pump cavity and a flow control valve (96) located in the flow delivery circuit wherein provision is made for opening the flow delivery circuit to a bypass circuit (72) upon an increase in the speed of the vehicle beyond a design point thereby reducing the pump back pressure and power usage which results in increased "road feel" at increased speeds while maintaining normal power assist during steering maneuvers at low speeds.

Abstract: A vane type rotary pump comprises a cam ring mounted within a stator housing and having an inner peripheral wall defining four circumferentially equi-spaced semicylindrical inner cam surfaces, a pair of end wall structures fitted to opposite ends of the cam ring to form a pump cavity, a drive shaft rotatably mounted within the stator housing, a rotor contained within the pump cavity and mounted on the drive shaft for rotation therewith, and a plurality of circumferentially equi-spaced vanes slidably fitted in the body of the rotor to cooperate with the inner cam surfaces to form four pairs of suction and delivery chambers.

Abstract: A multiple cylinder rotary compressor in which a capacity control is effected in response to a fluctuating load so that a saving of energy to be consumed is intended by means of such control that a supply of a low-pressure refrigerant gas is interrupted with respect to eigher compression element of at least two compression elements in the multiple cylinder rotary compressor etc.

Abstract: A multiple cylinder rotary compressor in which a capacity control is effected in response to a fluctuating load so that a saving of energy to be consumed is contemplated by detecting a rotational frequency of the driving shaft or a temperature of the car interior and the like, whereby a supply of a low-pressure refrigerating gas is ceased with respect to some cylinders in a plurality of the cylinders.

Abstract: A vane compressor is provided with a discharge rate control device which comprises valve means arranged to close part of the fluid suction passage leading to the pump working chambers to vary the opening of the fluid suction passage, and valve driving means for controlling the valve means. The valve means may be formed of at least one valve disposed to close an associated one of the inlet ports opening in the pump working chambers. The discharge rate control device may be arranged to be operated as a function of the rotational speed of the rotor of the compressor or the temperature of fluid being sucked into the compressor, which makes it possible, for instance, to keep the refrigerating capacity of an air conditioning system associated with the compressor at a substantially constant value.

Abstract: This disclosure deals with a mechanism for adjusting the timing of initiation of injection by a fuel injector of an internal combustion engine. The mechanism includes a piston connected to be moved by a drive for the injector, and another piston which is connected to move the plunger of the injector. A timing fluid supply is provided for feeding a timing fluid into a timing chamber formed between the two pistons under selected operating conditions, the timing fluid forming a hydraulic link between the two pistons. The mechanism further includes pressure relief means for releasing a portion of the timing fluid after the termination of injection, the relief means comprising a pressure responsive mechanism.

Abstract: The control system is utilized in a high pressure liquid spraying system including an internal combustion engine, a pump driven by the engine, a source of liquid connected to the pump and a spray nozzle assembly connected by a high pressure conduit to the output of the pump. The control system includes an enclosure and a valve assembly mounted near the pump. The valve assembly is operated by an electric switch mounted on the nozzle assembly and connected to a first solenoid valve in a hydraulic system for operating the valve assembly. The valve assembly includes a hydraulic cylinder which is mounted on the enclosure and which has a plunger positioned to open a ball valve of the valve assembly which is mounted within the enclosure and which is connected to the output of the pump.

Abstract: The disclosure relates to a control apparatus for the preparation of silver halide emulsions in which the flow rates of the reactants can be controlled to provide a desired pAg in the precipitation vessel. Several embodiments are used, depending upon the desired accuracy of pAg. The pAg and flow rate can also be caused to follow programs to maintain constant, or to vary, the pAg during a particular emulsion making process.