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| Number | Title | Issue Date |
| 7243672 | Flow control valve A spool bore (4) where a spool (6) slides, a concave portion (23) opened to the spool bore (4) and facing a return port 12 opened to the spool bore (4), and a land portion (11) disposed in an outer periphery of the sp... | 07/17/2007 |
| 7216662 | Flow control apparatus In a flow control apparatus, a fluid pressure is introduced from downstream of a metering orifice to a rear room of a spool while a relief valve in the spool is assembled in advance. A front section of a relief valve sub-assembly is press fitted to a hole provided o... | 05/15/2007 |
| 7217361 | Filter with support columns A filter includes first and second axially spaced end caps having filter media extending axially between the end caps and extending in a closed-loop around a perimeter defining a hollow interior communicating with an axial flow opening through one of the end caps. O... | 05/15/2007 |
| 7156135 | Quick-release connector structure for an air tank A quick-release connector structure for an air tank includes a connector body incorporated with an air tank and a seat block. The seat block is secured to the air tank and comprises a valve having a post extending forwardly. The valve is acting as a switch to turn t... | 01/02/2007 |
| 7131468 | Method for creating a ready-to-use product from a concentrated form A method for creating a ready-to-use product from a concentrated form comprises providing a source of locally supplied diluent to a dispenser having a fill station, providing a container of first concentrate at a remote site, providing a first product container, ide... | 11/07/2006 |
| 6758234 | Pressure reducing valve A combined fluid pressure reducing and relief valve having aligned inlet and outlet connections, a pair of abutting rotary disc valve sets each having an inboard stationary and an outboard rotary ceramic disc which are relatively rotatable against each other to expo... | 07/06/2004 |
| 6698446 | Check valve A check valve with an elongated body and a hole extending from an inlet end to an outlet end. A piston assembly is mounted within the body and can include a piston, a check valve seal and a piston spring. The piston spring biases the piston to a first pis... | 03/02/2004 |
| 6575189 | Automatic valve An automatic valve includes a housing having an inlet passage and a passage to outlet, a linearly movable shaft disposed in the housing having two stops separated by a predetermined distance, a hydraulic unit connected to the housing and to the linearly m... | 06/10/2003 |
| 6568418 | Precision regulator The precision regulator connects to a high pressure fluid source and regulates the pressure to a downstream apparatus. If an overpressure occurs, it can be vented to atmosphere. An elongate control stem engages a supply seal assembly and a vent seal assem... | 05/27/2003 |
| 6481454 | Regulator with segmented body The regulator connects to a high pressure fluid supply and regulates the pressure to a downstream apparatus. If an over-pressure occurs, it is vented to atmosphere. A segmented body reduces production costs. An elongate control stem engages a supply seal ... | 11/19/2002 |
| 6328535 | Flow control valve capable of adjusting fluid flow characteristics in accordance with a position of a valve element in a bore A flow control valve has body (20) containing a "bucket" shaped valve element (1) that moves in a bore (2). The valve element (1) has a discharge orifice (8) through which a needle valve (9) projects. Movement of the valve element (1) within the bore (2) ... | 12/11/2001 |
| 6173730 | Charging and bleed value A valve (60) for use in a brake system (10) through which a source (32) of fluid charges an accumulator (24) to a desired fluid pressure level and through which fluid pressure present in a conduit (52) is communicated to a reservoir (33) in the absence of... | 01/16/2001 |
| 6058962 | Flow rate regulating valve of hydraulic pump A flow control valve for a hydraulic pump is disclosed, which is so constructed that a first pilot chamber (101A) and a second pilot chamber (101B) are arranged in a manner to face a piston (102), resulting in the piston (102) varying initial load of a sp... | 05/09/2000 |
| 5857479 | Precontrolled three-way pressure reduction valve A precontrolled three-way pressure reduction valve having essentially vibration-free operation is encased in a cartridge and has a hollow control piston wherein a working fluid space is formed as a T-shaped cavity within the control piston. In the cavity,... | 01/12/1999 |
| 5735461 | High-pressure cleaner with bypass valve for the pump In a high-pressure cleaner of the type comprising a) a high-pressure pump (3), b) a motor driving said pump (3), c) a liquid supply (1,2) connected to the suction side (8) of the pump (3), d) a cleaning gun (4) connected to the delivery side (6) of the pump (3) thr... | 04/07/1998 |
| 5580817 | Valve assembly A valve assembly for a discharge device, in particular a steering pump, including a flow control valve for controlling flow from the discharge device to an actuator, and a pressure-limiting valve, wherein both valves form separate components of the valve ... | 12/03/1996 |
| 5289843 | Hydraulic safety valve A hydraulic safety valve adapted to cut or divert the flow of pressurized fluid A hydrau/sudden rupture occurs in the hydraulic system. The valve has a valve body with an inlet port, first and second outlet ports and a sump port. A first valve member cont... | 03/01/1994 |
| 4674527 | Pressure relieving linear motion valve The point at which pump out pressure exceeds load is sensed to provide a point for scheduling flow to an actuator in a hydraulic system. Flow is controlled by a stepper motor (28) that moves a flow control valve (27). The steps needed to achieve fixed flo... | 06/23/1987 |
| 4554940 | Pressure reducing and regulating valve A pressure reducing and regulating valve which is operated to move a seal container between an inlet, outlet and vent port in response to fluid pressure. One feature allows the valve to be mounted on a subplate in which both the inlet pressure and the out... | 11/26/1985 |
| 4515176 | Solenoid operated pressure regulation A normally closed line pressure regulator valve has an orifice that is opened and closed as the coil of the solenoid is energized and deenergized. When the valve is opened, the pump outlet is opened to a vent port. A line pressure relief valve in parallel... | 05/07/1985 |
| 4475568 | Pressure reducing and regulating valve A pressure reducing and regulating valve having a body with a body cavity and a seal container movable in the cavity. The container includes primary and vent seals. At least one flow plate is positioned in the body adjacent the container and includes prim... | 10/09/1984 |
| 4470428 | Unloader and check valve A combined unloading valve and check valve (10) for use with a motor driven air compressor. The unloading valve (16) includes a spool (30) axially movable within a tubular body (12). In the unloading position of the valve, one of two spaced-apart ring sea... | 09/11/1984 |
| 4444216 | Pressure reducing and regulating valve A pressure reducing and regulating valve having a container with a plurality of openings for moving between first and second flow plates having a plurality of inlet ports and a plurality of outlet ports for providing multiple flow paths through the valve ... | 04/24/1984 |
| 4388047 | Solenoid-operated pump A solenoid-operated pump for discharging fluid from a tank through a fluid discharge passage in a pump body has a directional control valve disposed in the fluid discharge passage. The directional control valve is normally urged to direct fluid flow throu... | 06/14/1983 |
| 4249558 | Bypass valve A bypass valve includes a valve body containing a spring loaded valve member. The valve body includes first and second interconnected bores respectively connected to the outlet and inlet of a fluid pump feeding a fluid function. A valve member slidably di... | 02/10/1981 |
| 4182354 | Method and apparatus for flow diversion in a high pressure fluid delivery system A method and apparatus for the diversion of fluid flow at reduced pressure out of a high pressure fluid delivery system when the discharge of the system is closed. A bypass valve having a movable piston oriented transverse to the flow direction and a slid... | 01/08/1980 |
| 4178953 | Fail safe bypass valve A diaphragm operated valve includes a valve body having inlet, outlet and bypass ports in it. A diaphragm assembly includes a flexible diaphragm and a valve stem. The valve stem has a main valve member attached to it which is movable with the diaphragm as... | 12/18/1979 |
| 4171004 | Safety regulator for fluid pressure This safety device has a delivery outlet and a pressure-relief valve for venting gas from a source of gas when the gas pressure rises above a predetermined maximum. A delivery line supplies gas from the source to a place of use, and there is a delivery li... | 10/16/1979 |
| 4159025 | Back flow preventer valve A back flow preventer valve assembly for protecting fluid supply systems against back flow of contaminating fluids includes a pair of serially connected check valves positioned within respective housings which are connected together and to inlet and outle... | 06/26/1979 |
| 4121609 | Hydraulic speed governor Flow from a pressure source is bidirectionally conducted to a prime-mover driven, bidirectional, positive displacement pump and in-series flow restrictions; the pressure source and flow restrictions functioning to provide the reference flow rate; the pres... | 10/24/1978 |
| 4111223 | Control line relief valve The invention covers a control line relief valve which restricts control line flow in the event of overpressurization, and vents one portion of the line.... | 09/05/1978 |
| 3953154 | Pressure control and unloader valve An improved pressure control valve and unloader valve incorporating a floating check valve which is responsive to a gradual restriction in the discharge line and is also responsive to the shock wave formed as a result of a sudden shut-off of the discharge... | 04/27/1976 |
| 3939859 | Unloader valve with flow divider An unloader valve with flow divider having a fluid pressure source, a first fluid pressure circuit with an accumulator, and a second fluid pressure circuit, comprising a main body having a large diameter cylinder and a small diameter cylinder which are pr... | 02/24/1976 |
