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| Number | Title | Issue Date |
| 4759257 | Power unit particularly for refuse container packer mechanism A fluid operable power unit which is particularly adapted for movement of a compaction head in a refuse container. However, the power unit is also useful in other types of mechanism. The power unit comprises a plurality of telescopically movable cylinders ... | 07/26/1988 |
| 4728260 | Direction-selectable sending-out pump An impeller driven by a reversible motor is set in a housing and a functional path capable of sending out liquid by pump action is formed between the inner wall of the housing and the impeller. On the both-end side of the functional path are provided two ... | 03/01/1988 |
| 4664137 | Two-level pressure control device Two-level pressure control device has a pressure control valve VLP 3 associated with a system of jets and in series to obtain a first reference pressure level P1 and a second reference pressure level P2.... | 05/12/1987 |
| 4625751 | Vehicle steering and auxiliary function hydraulic circuit A hydraulic circuit includes as its major constituents a pump supplying hydraulic fluid to a main steering valve and to an auxiliary function valve through a priority valve. The priority valve allows the main steering valve to preempt the auxiliary functi... | 12/02/1986 |
| 4556078 | Priority valve A priority valve is disclosed for controlling fluid flow between a power source and a secondary hydraulic function operated by the power source. The priority valve includes a housing having first and second bores formed therein. An inlet passage connects ... | 12/03/1985 |
| 4541451 | Priority valve A priority valve is disclosed for controlling fluid flow between a power source and a priority function and secondary function operated by the power source. The priority valve includes a housing having first and second bores formed therein. An inlet passa... | 09/17/1985 |
| 4531536 | Flow divider-combiner valve A novel flow divider-combiner valve unit is disclosed. A valve body includes fluid passageway means for controlling fluid flow through the divider-combiner valve unit. The fluid passageway means comprises: a cavity, first, second and third passageways; fi... | 07/30/1985 |
| 4476889 | Control valve and switch assembly A control valve and switch assembly for automatic control of the pressure in a high pressure fluid system, such as in car washing apparatus, and comprising a housing having a fluid chamber therein providing communication between a pressure fluid source, s... | 10/16/1984 |
| 4458708 | Fluid distribution system A water distribution apparatus employs a self-positioning water flow actuated rotor for serially channeling water flow into each of a plurality of outlet conduits from a common source of water under pressure. The rotor, housed within an encapsulating cavi... | 07/10/1984 |
| 4412553 | Device to control the transmembrane pressure in a plasmapheresis system A fluid flow control device comprises first second, and third fluid pathways. The first and second pathways are adapted for communication with separate sources of pressurized fluid. The third pathway is coupled in flow communication with the first pathway... | 11/01/1983 |
| 4372334 | Overpressure relief control system A control system for an overpressure relief arrangement includes a valve providing selective communication between a pressure passage connected to a pressure vessel and a pair of relief passages, each relief passage having an overpressure relief device th... | 02/08/1983 |
| 4332270 | Flow control and accumulator charging valve The valve device disclosed includes first, second and third user ports. A pressure accumulator connects with the first user port. With the accumulator fully charged, a pressure port connected to a pump communicates with the second user port. With the accu... | 06/01/1982 |
| 4325400 | Fluid flow equalizing valve arrangement A fluid flow equalizing valve has two coupled valve devices for controlling flow to or from a common connection to respective ones of a pair of actuators. Control elements of the valve devices are responsive to intermediate pressures in flow paths to or f... | 04/20/1982 |
| 4320622 | Pump unloader and accumulator charging valve In an hydraulic system an unloader valve is located in a line between a pump and an hydraulic accumulator. The unloader valve is operative to prevent the accumulator from being overcharged and to allow the pump to re-charge the accumulator should the pres... | 03/23/1982 |
| 4244390 | Hydraulic circuit breaker A hydraulic circuit breaker comprising an inlet chamber supplied with pressurized fluid from a pump and connected to a hydraulic circuit of the open-center type through a variable constriction, to a control chamber via a passage of reduced cross-section p... | 01/13/1981 |
| 4232701 | Flow divider valve A valve for dividing a fluid flow at an inlet port subject to variable flow volume into two fluid flows at first and second outlet ports having a substantially constant ratio of flow volumes, including first and second flow passages from the inlet port to... | 11/11/1980 |
| 4223694 | Hydraulic circuit breaker In a hydraulic circuit breaker comprising a housing with an inlet orifice connectable to the outlet of a hydraulic pump, a first outlet orifice connectable to the pressure chamber of a hydraulic pressure accumulator, and a second outlet orifice connectabl... | 09/23/1980 |
| 4221232 | Shut off valve units of damaged sections in pneumatic multi-section braking systems of vehicles Shut-off valve unit for damaged section in multi-sectioned pneumatic braking system for vehicles: each section has a shut-off valve that is spring loaded to close; each valve has an associated pneumatic device for loading the spring of the shut-off valve ... | 09/09/1980 |
| 4197871 | Fluid control valve A vehicle power steering system which effects steering with a pair of fluid actuated cylinders, one cylinder being operatively connected to each steerable wheel. Each cylinder is normally powered independently of the other cylinder so that both cylinders ... | 04/15/1980 |
| 4161184 | Linear rolling contact valves Linear motion fluid-actuated valves in which all elements are in rolling contact. Two major rollers are prevented from moving apart by a retainer belt, a separator roller depressing the belt between the two major rollers to prevent them from moving toward... | 07/17/1979 |
| 4131125 | Charging valve for a fluid pressure accumulator An accumulator charging valve has a housing with an inlet and two outlet orifices respectively connected to the pump outlet, to a fluid accumulator and to an open center hydraulic circuit. A main passage is provided between the inlet orifice and the secon... | 12/26/1978 |
| 4089169 | Pressure actuated signal fluid control for load responsive systems A hydraulic system includes a fluid responsive means that controls the effective output of the pump in response to pressurization of signal fluid that is supplied by the pump. The signal fluid is pressurized by flowing through a synthetic signal generator... | 05/16/1978 |
| 4076036 | Hydraulic flow control valve assemblies A control valve assembly for use in a pump-operated vehicle hydraulic braking system as disclosed in which the output from the pump flows through the control valve, which selectively directs the output to steering gear of the vehicle or to an accumulator ... | 02/28/1978 |
| 4057073 | Plural-service hydraulic system A pump or other source supplies hydraulic fluid under pressure to a plurality of slave services which require a pre-selected priority of supply such as, e.g., brakes (first priority), power steering (second priority), and self-leveling device (third prior... | 11/08/1977 |
| 4054327 | Air brake system with line pressure loss protection An air brake system for a vehicle with a plurality of air-operated brakes has means for retaining braking capacity in the event of line rupture or severe leakage at various points in the system. Brake control means, preferably of the form with two separat... | 10/18/1977 |
| 4014360 | Plural-service hydraulic system A pump or other source supplies hydraulic fluid under pressure to a plurality of slave services which require a pre-selected priority of supply such as, e.g., brakes (first priority), power steering (second priority), and self-leveling device (third prior... | 03/29/1977 |
| 3999932 | Valve assembly having leak detection apparatus A valve assembly including a gas valve having first and second redundant valve members which are individually operable to open and close respective inlet and outlet valve ports, and a pressure regulating apparatus interposed between the inlet and outlet v... | 12/28/1976 |
| 3997107 | Servo modulating regulating control system A servo valve control system exemplified by way of temperature controlled gas valves. Multiple slave pressure regulating valves are utilized supplying multiple burner manifolds. The first valve of the group of valves is modulated in response to temperatur... | 12/14/1976 |
| 3963039 | Hydraulic installation with means for storing energy A hydraulic installation with means for storing energy produced by the prime mover during a rest period of the installation. Energy is stored by a fluid accumulator by suitable positioning of control valves during the reset period. Control of the valves i... | 06/15/1976 |
| 3950943 | Air diverter valve In a system for delivering air from an air pump to the exhaust system of an internal combustion engine, an air diverter valve assembly has a regulating control responsive to air pump discharge pressure which positions the diverter valve member to divert e... | 04/20/1976 |
| 3934413 | Air flow control unit for engine secondary air supply In a system for delivering air from an air pump to an exhaust system and accessories for an internal combustion engine, an air flow control unit has a high pressure relief valve, an outlet open to the exhaust system, a vent open to the atmosphere and an o... | 01/27/1976 |
