Abstract: To control the flow of fluid from a positive displacement pump to a consumer line, a rotating shutter periodically opens return flow nozzles which permit the pressure-free return of the pumped fluid to a fluid reservoir. In order to provide hydraulic balancing of the forces on the shutter, the return flow nozzles are disposed symmetrically with respect to the axis of the rotating shutter. Pressure peaks which occur when the return flow nozzles are closed cause undesirable noise generation and these pressure peaks are reduced by the disposition of separate check valves associated with each of the symmetric flow conduits. The use of separate check valves reduces the length of the fluid column which must be accelerated upon nozzle closure. To reduce the opening stroke of the check valve, the edge of the valve seat meanders thereby extending its effective length. Axial play of the rotating shutter is controlled by the disposition of a spring loaded glide block.

Abstract: A stator has a cylindrical bore. A cylindrical rotor fits in the bore with a clearance. A circumferential groove varying in depth is formed around the circumference of the rotor. Ball bearings support the rotor for rotation in spaced relationship from the bore without a seal. Axially elongated inlet and outlet slots are formed in the stator so as to communicate with the groove at circumferentially spaced points. Vent holes lead from the bore to the exterior of the stator between the inlet and outlet and the ball bearings. The valve is coupled by first and second legs of a tee connection to a patient. A third leg of the tee connection is connected by a needle valve to a vacuum source.

Abstract: A control valve is provided which is adapted to be connected between a pressure source, such as vacuum pump, and a pressure vessel so as to control the pressure in the vessel. The valve comprises a housing having a longitudinal bore therethrough which is connected between the pump and vessel, and a transversely movable valve body which controls the air flow through an air inlet in the housing. The valve body includes cylindrical and conical shaped portions which cooperates with reciprocally shaped portions of the housing to provide flow control. A filter disposed in the air inlet filters out foreign matter in the air. The bottom end of the valve body screws into the valve housing control knob formed integrally with the valve body controls translation of the valve body and hence opening and closing of the valve.

Abstract: A modular multiple-fluid component selection and delivery system comprised of a main block having a centrally located main passageway intersected by a plurality of secondary passageways. Plug valves are inserted in bores in the block which intersect each respective main and secondary passageway. A valve at the entrance to the main passageway permits flushing the system with a solvent for cleaning the main passageway and spray gun. A check valve at the entrance to the main passageway prevents a backup of fluid components into the solvent supply system. The secondary passageway exits at the sides of the block to which are attached hose connecting fittings. The main passageway terminates in the opposite end of the block in threads for attachment to a main hose to a spray gun for spraying a fluid component such as paint.

Abstract: A valve assembly of the type providing bypass flow through a branch channel when the movable valve member is in the closed position to block flow through the main flow channel outlet. A venturi device is disposed in the main channel upstream of the movable valve member, and the venturi has secondary ports provided through the wall at the throat section. When the movable valve member is in the closed position, flow into the venturi exits at the flow ports and flows through the bypass channel. When the movable valve member is in the open position, flow discharges from the venturi, through the main channel outlet port downstream of the movable valve member, thereby causing reduced pressure at the venturi throat and preventing flow through the secondary ports to the bypass channel.

Abstract: A group valve for selectively connecting two liquid supply lines separately to a container. The valve comprises a housing with three chambers, one of which is separately connected to the others communicating with a respective liquid line. In each chamber there is a rotary slide, said slides cooperating to at each particular time open one line and close the other. In order to prevent leakage from one line to the other said two chambers communicating with the liquid lines, respectively, are provided with an outlet to the atmosphere, said outlet of each chamber being closed by the rotary slide when the liquid line is open and open when the line is closed.

Abstract: An improved hot water heating system used with an internal combustion engine is disclosed. This system provides a hot water flow control arrangement in which hot water supplied to a heating radiator is controlled by a valve and a pressure responsive bypassing means to keep a comfortable temperature. The pressure responsive bypassing means is closed when the maximum heating capacity is required to avail to the heating radiator all the hot water supplied by the engine even when the hot water pressure increases to exceed a bypassing pressure level.

Abstract: A valve consisting of a rotating flapper type valve which covers an inlet d outlet opening in a missile base and being held open by the insertion of an inlet fitting of a supply duct into the valve for supplying conditioned air into a missile and the valve having spring means biasing it in the closed direction against the action of the supply duct and latch means which latches the flapper type valve in the closed position when said supply duct has been removed from the air inlet opening of the valve.

Abstract: Manifold assembly having a plastic body with intersect flow passages and valve members for controlling communication between the passageways. Stops limit the movement of the valve members between predetermined positions, and the valve members can be removed from the body and reinstalled in reversed position to provide fixed communication between certain of the passageways. Externally threaded nipples are provided for connecting the assembly to external fixtures, and resilient sleeves are inserted between the valve members and the body to form fluid tight seals.

Abstract: In a non-drip valve for a fluid flow line having a vacuum unit comprising supply chamber, a discharge chamber and a vacuum chamber connected to the discharge chamber to withdraw fluid therefrom when the forward flow is arrested, an improved control valve controlling the flow of fluid from a source to the supply chamber comprising a ball element operable between alternate positions, one of which admits fluid from the source of supply to the supply chamber and blocks the flow of fluid from the supply chamber to a return line, and the other of which blocks flow of fluids from the supply source to the supply chamber and simultaneously affords flow of fluid from the supply chamber to the return line, the position of said ball element being controlled by the armature of a solenoid.

Abstract: The flow of fluid from a constant output positive displacement pump entering an outlet line directed to a consumer may be varied by periodically interrupting this flow and directing the flow instead into a zero pressure pump reservoir. This interruption is accomplished by a rotary shutter which periodically and alternately opens and closes the line to the reservoir. The line from the pump flows into two nozzles opening into opposite sides of the rotary shutter and directed toward one another. The rotary shutter comprises a shaft with two raised ribs thereon positioned to simultaneously open or close both of the nozzles, thus hydrostatically balancing the shaft. The edges of the raised ribs have cutting angles thereon for milling the opening of the nozzles during operation to produce an optimum gap between the rotary shutter and the nozzles. Only when the nozzles are closed is the flow directed into the outlet line to the consumer.

Abstract: A safety mechanism including a hand restraint safety mechanism for use by an operator of a machine such as a press, special machine or fixture wherein (absent the present invention) the operator's hands are exposed to the hazard of being caught in the work area of the machine by moving machine elements when the machine is stroked. The hand restraints for the operator's hands are operatively coupled via cables with a fluidic power cylinder mounted in fixed dimensional relation to the machine with which the safety mechanism is used. This restraint cylinder is operative between restraining and released positions to control the length of each cable extended from a housing on which the cylinder is mounted. When the cables are maximally extended, the operator can reach into the machine to load or unload a workpiece. When the cables are minimally extended, the operator's hands are positively removed from the work area of the machine.