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| Number | Title | Issue Date |
| 4403627 | Buffer valve A buffer valve or compensator for use in a margarine mold system to permit continuous operation of a positive discharge pump in the system, such valve including a valve housing connected to a conduit section for a flow line on the discharge side of the pu... | 09/13/1983 |
| 4370854 | Fuel valve A valve assembly for controlling the flow of a liquid fuel. The assembly includes a spring-biased movable valve member made of tungsten carbide, a captured sleeve member also made of tungsten carbide, and a readily accessible filtering screen member dispo... | 02/01/1983 |
| 4332274 | Disconnector for drinking water distribution system Disconnector intended to be inserted in a drinking water distribution system so as to prevent, in the case of a pressure drop for any reason whatsoever, the water which is downstream and may be considered as polluted, from being fed-back upstream beyond t... | 06/01/1982 |
| 4317467 | Two-way pressure relief valve There is disclosed a two-way valve which includes a single valve seat for controlling the flow of fluid in opposed directions through the valve responsive to differential fluid pressures across the valve. The valve includes first and second ports and a va... | 03/02/1982 |
| 4313463 | Pressure-relief valve device A pressure-relief valve device, especially for use with hydraulic props, has a main hollow housing containing a guide piece with a through bore in which a cylindrical shank of a valve or piston member is received. The shank is slidable within the guide pi... | 02/02/1982 |
| 4308887 | Gas damper A gas damper for regulating the mass flow of a stream of purging air as it is directed into an electrostatic precipitator including a generally cylindrical housing having a floating piston positioned in metering relationship to the discharge outlet of the... | 01/05/1982 |
| 4284101 | Pressure-relief valve devices A valve device for pressure-relief of, e.g., hydraulic props of mine equipment, has a main hollow housing into which a guide is in screw threaded engagement for adjustment purposes. The guide has a through bore which slidably receives the cylindrical stem... | 08/18/1981 |
| 4282896 | Pilot operated check valve A pilot operated check valve for high pressure service utilizing an O-ring is disclosed, wherein a poppet valve having a seating surface for engagement with a valve seat is provided on its front side with a spool member formed integrally therewith and pro... | 08/11/1981 |
| 4274435 | Excess pressure valve particularly for a fluid pressure operated telescopic supporting element employed in underground mining An excess pressure valve particularly for props having telescopic parts which are extensible or retractable by fluid under pressure used in underground mining operations, comprises a valve housing having a bore therethrough with a connection end connectab... | 06/23/1981 |
| 4267858 | Pressure relief valve A pressure relief mechanism seated within a wall of a pressure vessel features a novel flexible seal. The vessel pressure acts against both a spring and an internal valve pressure created by the flexible seal. The pressure relief mechanism can be designed... | 05/19/1981 |
| 4258793 | Oil well testing string bypass valve An improved bypass valve for use with an oil well testing string is disclosed which includes a check valve means for allowing fluid flow from the interior of the test string to the well annulus when the interior pressure exceeds the well annulus pressure.... | 03/31/1981 |
| 4256137 | Check valve A check valve for use in a flow line has a valve body which includes a first portion with an inlet and an outlet, the inlet and outlet being substantially aligned with one another. The valve body further includes a second portion with tubular member havin... | 03/17/1981 |
| 4176680 | Check valve A check valve used in a fluid flow line is disclosed and includes a body having a first portion defining an inlet passageway, an outlet passageway and a shoulder which directs fluid flow upwardly through an opening into the outlet passageway and a second ... | 12/04/1979 |
| 4171712 | Fuel tank venting valve A venting valve connected to the interior of the fuel tank has a sliding piston and a plurality of springs which hold the piston in different operative positions dependent upon the amount of pressure within the tank.... | 10/23/1979 |
| 4168721 | Pressure control valve An improved pressure control valve which provides equal damping force in both directions of movement of the valve spool and which also provides negative feedback to partially negate fast transients leading to valve instability. The pressure control valve ... | 09/25/1979 |
| 4161996 | Exhaust muffler An exhaust muffler intended for noise dampening of, for instance, pneumatic tools, comprising a variable flow restricting passage, an attenuation chamber and a non-variable flow restricting passage. A valve body is arranged to control said variable flow r... | 07/24/1979 |
| 4161189 | Control valve A pressure control valve having improved damping means which permits the valve to have a high degree of response combined with improved stability. The valve includes a valve spool mounted within a valve body and shiftable against spring pressure from a no... | 07/17/1979 |
| 4142550 | Pressure regulating valve A pressure regulating valve is disclosed as including a valve seat having a flat working surface and a central inlet bore extending perpendicularly from the flat working surface through the seat. A valve disc having a flat circular working surface, the di... | 03/06/1979 |
| 4142549 | Relief valve A pressure relief valve for instantaneously relieving high pressure from a chamber wherein the relief valve pressure area for exhaust is greater than the initiating pressure area and having a flow relief area that is smaller than the area gauging the pres... | 03/06/1979 |
| 4099894 | Fuel injection for diesel engines having controlled-rate pressure relief means A piston-type injection pump for supplying a nozzle-type injector in a diesel engine is provided with integral facilities for effecting the controlled expansion of the discharge conduit between the pump and the injector and with additional facilities for ... | 07/11/1978 |
| 4085772 | Valve assembly A valve assembly comprises a valve body having a bore therein, a first opening communicating with the bore, and a second opening displaced from the first opening and also communicating with the bore. A valve element is slidably mounted in the bore for lon... | 04/25/1978 |
| 4074796 | Adjustable sequence valve for towing winch hydraulic controls A towing winch system with fluid pressure actuated power input and winch input clutches disposed serially between the power take-off and cable drum. A controlled but variable reduced fluid pressure from a source is applied to the winch input clutches and ... | 02/21/1978 |
| 4064906 | Valve for water pipes A valve for water pipes comprises a housing with an inlet opening and an outlet opening with a through-flow chamber arranged between both these openings, in which a spring loaded valve spindle provided with a sealing means is arranged to work in a directi... | 12/27/1977 |
| 4064897 | Tire filler valve arrangement A filler valve arrangement for vehicle tires which includes a valve body having an air inlet passage and an auxiliary passage communicating therewith in which auxiliary passage is disposed and over-pressure valve which is normally biased into a closed pos... | 12/27/1977 |
| 4049014 | Power transmission A cartridge type sleeve and plunger hydraulic valve is retained in a blind bore along with a biasing spring by a closure plug. Spaced transverse passages intersecting the bore are either separated or connected depending upon whether the plunger is either ... | 09/20/1977 |
| 3955852 | Trailer hub cap device The hub cap device includes a cylindrical housing mountable on the trailer wheel hub and having a spring loaded piston that is movable between defined inner and outer positions. As the hub is filled with grease under pressure through a grease fitting on t... | 05/11/1976 |
| 3943969 | Positive acting check valve of polyvinylchloride to open in response to predetermined line pressure A valve, the housing and gate of which are composed of molded rigid polyvinylchloride, the valve body having an interior chamber with a main upstream inlet and a main downstream outlet and an annular valve seat in the housing, and a gate being arranged in... | 03/16/1976 |
