Abstract: A milking apparatus automatically providing the appropriate amount of vacuum for purposes of milking a cow throughout the entire milking operation. The milking apparatus includes a fluid control valve system having a controller unit and a discharge valve in fluid communication with a collection jar. The controller unit is further adapted for communication with a source of vacuum, and the collection jar is adapted to be in communication with the cow such that the vacuum can draw milk from the cow into the collection jar. The discharge valve is further adapted for communication with a source of vacuum for drawing the milk through the discharge valve.

Abstract: The present invention relates to novel remotely dismountable valves comprising a valve body welded to the pipes and having a truncated seat, an outwardly truncated member fitting on said seat, an obturator whose movements may be remotely controlled due to an extension element and a heavy element made fast with the member via a cross-piece presenting an upper surface in the form of a segment of a sphere on which surface the likewise spherical surface of the lower face of said heavy element abuts.

Abstract: A pressure-compensated directional control valve assembly suitable for use in hydraulic power steering systems of off-highway working vehicles. The valve assembly integrally comprises a control valve for controlling communication between two engine-driven pumps and a steering cylinder, and a pressure compensator valve for controlling the fluid pressure delivered from the pumps to the control valve. Constantly comparing its outgoing fluid pressure with the fluid pressure at control ports of the control valve, the pressure compensator valve delivers to the control valve the pressurized fluid from one or both of the pumps. Any excess of the pressurized fluid is directed from the pressure compensator valve to, for example, an implement hoist cylinder of the work vehicle.

Abstract: An electromagnetically controlled pneumatic valve includes a chamber having a first nozzle of magnetic material in opposed relation to a second nonmagnetic nozzle. A cylindrical, permanent magnet, valve member may become seated upon one or the other of the nozzles in response to an electromagnetic field generated by a coil surrounding the first nozzle. A conduit from the chamber between the nozzles connects to a pneumatic load such as an air tool.

Abstract: A solenoid valve assembly including a movable armature acting through a lost motion unit for moving a valve member to an open position. The lost motion unit stores armature stroke energy during an initial stage of armature stroke, and sums the stored energy with armature stroke energy during a latter stage of armature stroke to open the valve member.

Abstract: The invention provides a siphonic apparatus to effect irrigation of a field from a water supply. The apparatus comprises a bridging structure which includes a chassis fabricated from spaced longitudinal bottom members, spaced longitudinal top members interconnected by cross members, vertical struts, diagonal braces and side plates to form a rigid structure having a central elevated section and downwardly angled end sections, the ends of which being on substantially the same plane as the surface supporting the chassis.At least one siphonic tube is rotatably, transversely supported in the chassis.

Abstract: A hydraulic flow control apparatus is provided which is adapted to provide a constant pressure differential between a pump and an external load. the apparatus includes a housing, and a balance piston slideably mounted therein. The pump pressure acts to bias the piston in a direction toward a pump bypass position, and the piston is urged in the other direction and toward its operating position by the consumer pressure and a spring. Means are also provided whereby the pressure of the pump necessary to move the piston toward its bypass position and against the force of the spring, may be minimized during operation in the idling mode, to thereby minimize power consumption.

Abstract: A combination vacuum lift pump and siphon for handling liquids, comprising a pump cylinder having an inlet disposed near one end and an outlet adjacent to but spaced from the other end, a piston reciprocatable in the cylinder, and a plunger and handle connected therewith, and a pair of check valves, one of which is associated with the piston and is operable to be closed when the plunger is lifted in the cylinder, and the other of which is disposed at the cylinder inlet and is operable to be closed when the plunger is lowered in the cylinder. The outlet of the cylinder is spaced a short distance from the upper end thereof, such that for siphon operation the piston and its check valve can be moved to a position in the cylinder which is beyond the location of the outlet. Accordingly, the flow of liquid by-passes the piston check valve completely, and the latter thus does not act in such a manner as to restrict the siphon flow, as was the case in many other constructions.

Abstract: A 4-way, 2-position pilot valve having two ball valves seatable at approximately the same time without a precise spacing.

Abstract: A control valve for a high pressure hydraulic system with a piston slide ch can be moved from a neutral position into a first and, if desired, into a second control position, which makes it possible to effect a connection between a pump connection opening and at least one consumer device connection opening staggered relative thereto in a longitudinal direction with flow pockets on the circumference and throughflow channels between the flow pockets.

Abstract: A speed control and transmission vent valve (10) includes a first valve (12), a second valve (14) having first (64) and second inlets (66), an openable outlet (70) and a spool (62 or 62') movable in response to fluid in the inlets (64,66) between first, second and third positions, a passage (112) connecting the first valve (12) to the first inlet (64), and two-state switch means (16) for communicating fluid in the passage (112) to the second inlet (66) in response to one state of the switch means (16) to move the spool (62 or 62') from the first to the second position and for communicating fluid in the passage (112) to the first inlet (64) in response to a second state of the switch means (16) to move the spool (62 or 62') from the second position to the third position in which a fluid control signal is generated.

Abstract: The present invention relates to a device at hose reels having at least one windable hose (4) and at least one conduit (5) communicating with the hose via a swivel device (6).In order to provide at such hose reels a simple device rendering it possible to use hoses for distributing a plurality of media separated from each other, the invention is characterized by at least one bearing element (27) which, on one hand, is mounted on the swivel device (6) permitting flow of medium between the conduit (5) and the hose (4) and, on the other hand, forms an inner passage (29) for flow of medium between inner tubes (7 and 8 respectively) within the hose and the conduit, whereby at least one of the inner tubes (8 and/or 7) is rotatably connected to the bearing element.

Abstract: An armature of magnetizable material is mounted within a magnetic housing by means of a pair of Belleville springs so that the armature is movable along the central axis thereof between opposed pole pieces formed in the housing. A radially magnetized permanent magnet is positioned in the housing concentric with the armature and a single actuator coil is positioned in the housing concentric with one of the pole pieces. The armature is held in engagement with one of the pole pieces by the flux of the permanent magnet. When the coil is energized the armature is moved into engagement with the opposite pole piece against the biasing force of the Belleville springs, in which position one valve element is closed and the other valve element is opened. The armature pole faces and the pole pieces within the housing have a configuration such that when the armature is in the coil energized position the magnetic permeance of the armature with respect to each pole piece is substantially equal.

Abstract: An energy saver control system for prevention of water freezing in an outdoor tank, such as a stock tank, which involves a conventional type of water level control valve to maintain a selected level of water in the tank, and an electrical switch which is controlled by the pressure which is in the water line leading to the water level control valve. Means are provided to control the rate of water flow into the tank to a selected low value, sufficient for prevention of freezing of the surface of the water in the tank. When water is flowing into the tank the electrical heater is cut off. The electrical switch is controlled by the pressure in the water line leading to the water level control means.

Abstract: A starting valve is disclosed having a starter choke valve and a poppet valve which is kept closed by the starter choke valve when the choke valve is in an open position. For mounting the starter choke valve there is provided a choke shaft and a bushing set screw which interact with a plurality of tapered bushes. The arrangement provides for an axial and a radial compression of the bushes to prevent foreign matter from fouling the movement of the choke. Also a compensation for the varying tolerances between the component parts is accomplished by providing a plurality of rubber-elastic components.

Abstract: A three-way, normally closed only, pilot valve for supplying pressurized pilot air to a fluid flow control valve, such as a four-way valve, a three-way valve, a two-way valve, or the like, for shifting the main spool valve of such valves. The pilot valve includes a valve body with a pressurized pilot air inlet port, a cylinder port, and an exhaust port. The inlet port is connected by a first passageway to the cylinder port. The cylinder port is connected by a second passageway to the exhaust port. A poppet spool valve is movably mounted in the valve body between an inoperative position for blocking the first passageway means, and an operative position for opening the first passageway means and blocking the second passageway means. A spring and air assist return means moves the poppet spool valve to the inoperative position. A solenoid moves the poppet spool valve to the operative position. The poppet spool valve has only one dynamic seal.

Abstract: In a pneumatically powered grinding machine provided with a flyweight operated speed governor there is incorporated an independently operating overspeed safety device which in case of malfunction of the speed governor is intended to obstruct further motive air supply to the motor of the machine. The overspeed safety device comprises an annular valve disk having two centrifugal weights which together with a suspender plate form a latch means by which the valve disk is kept in its open position at motor speeds not exceeding a predetermined level. In its open position, the valve disk is elastically bent about a diameter line as a result of the latch engagement between the centrifugal weights and the suspender plate. When the predetermined speed limit is reached, the valve disk is released from the suspender plate to occupy, while resuming its original flat shape, an air supply obstructing, closed position. The safety device is not resettable without dismantling the machine.

Abstract: A bleed valve assembly which includes a bleed valve seat having a bleed orifice partially defined thereby and a piezoelectric crystal mounted adjacent thereto so that upon bending of the crystal, as by energization thereof, pressure contact is made with an intermediate valve element. The valve element is in turn adapted to move against the bleed valve seat to close the same. When the bleed valve assembly is closed in the manner above described, pressure is permitted to build up in the orifice to modify the position of a main valve with which the bleed valve assembly is utilized. In addition the crystal is beam mounted within a bore in which the valve seat is positioned and essentially in contact with said bore solely at spaced peripheral edge positions thereof.

Abstract: An improved winterizing system for a recreational vehicle or vacation home for the prevention of freezing and damage to the plumbing, the system providing for the sequential energizing of solenoid valves and the pump switch to effect the distribution of a non-toxic anti-freeze solution throughout the plumbing lines. A special cam switch assures the proper sequence of electrical switching.

Abstract: A pressure compensated load responsive flow control valve for use in a system controlling a plurality of loads. The system is powered by a single, fixed displacement pump. The flow control valve is equipped with a load responsive control, which during simultaneous control of multiple loads automatically maintains the pump discharge pressure at a level higher than the pressure required by the largest load being controlled. To obtain unidirectional flow, load sensing passages of individual valve spools are connected by check valves with the load responsive control, which is equipped with a leakage control, maintaining a relatively constant leakage from load sensing circuit, irrespective of sensing circuit pressure and permitting fast response of pressure compensated load responsive flow control valve without excessive leakage losses.