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| Number | Title | Issue Date |
| 4574836 | Bypass valve with indicator A differential fluid pressure indicator including a bypass valve which provides an indication that the filter is in the bypass condition. The bypass valve includes a differential area piston which includes at the outlet port thereof a restriction orifice ... | 03/11/1986 |
| 4566486 | Soft seat for safety valve In a poppet-type relief valve, including a housing having a spring guide assembly axially biasing a valve toward a seat in its inlet passageway, a soft valve seat member is coaxially disposed in the inlet passageway. The soft seat member includes a rigid ... | 01/28/1986 |
| 4557136 | Valve testing A method of testing a relief or safety valve of the type which includes a valve member, urged into engagement with a seat by a spring arrangement and an adjustment member by means of which the urging force exerted on the valve member by the spring arrange... | 12/10/1985 |
| 4537384 | In-line check valve having combined downstream poppet support and flow control elements A poppet-type check valve utilizing an integral detachable flow control assembly for insertion into a cooperating housing. The checking poppet is oriented with its actuating stem, concentric guide, and concentric force bias spring downstream of the check ... | 08/27/1985 |
| 4529165 | Solenoid valve A normally-open, solenoid-controlled valve includes a stationary valve-seat spindle and a cylindrical valve sleeve encircling and slideable along part of the valve-seat spindle. The valve-seat spindle has an annular control edge and the valve sleeve inclu... | 07/16/1985 |
| 4520843 | Flow control valve The present invention comprises a valve body (24) with an inlet (28) and an outlet (30), and an inlet-closing poppet (32) moveably disposed within a chamber (26) in the valve body, the poppet incorporating a piston head (34) whose face (36) opposes the in... | 06/04/1985 |
| 4504081 | Check valve in pressure control circuit An integrated valve unit for a pressure control circuit which comprises a case, a drier wholely contained in the case, and a check valve formed and positioned in an inlet of the case having a longitudinal axis perpendicular to the longitudinal axis of the... | 03/12/1985 |
| 4498493 | Pressure valve assembly for a fuel tank filler neck cap A pressure/vacuum valve assembly for a fuel tank filler neck comprises a pressure-release valve member, a vacuum-relief valve, and a pressure-release control member in a vent passageway. The vent passageway has an axially outwardly facing surface and a ra... | 02/12/1985 |
| 4489697 | Distributor type fuel injection pump having a starting injection timing advance device In a distributor type fuel injection pump for use with an internal combustion engine, which is equipped with an injection timing control device operable in response to oil pressure within a pressure oil chamber, which is variable as a function of the rota... | 12/25/1984 |
| 4487217 | Reversing valve for combination meter A reversing valve for a combination meter, including a closure element, movable in the axial direction, which is provided with a cylindrical closure ring which in the closed position of the reversing valve covers radially outwardly directed valve openings... | 12/11/1984 |
| 4481973 | Differential pressure energized circulating valve A circulating valve is provided for connection into the tubing string of a well for establishing selective flow of fluid between the tubing string and the well casing. The circulating valve incorporates a valve body which is adapted for connection into th... | 11/13/1984 |
| 4446886 | Safety relief valve soft seat In a poppet-type relief valve, including a housing having a spring guide assembly axially biasing a valve toward a seat in its inlet passageway, a soft valve seat member is coaxially disposed in the inlet passageway. The soft seat member includes a rigid ... | 05/08/1984 |
| 4432389 | Reseat relief valve A relief valve with a low hysteresis closing curve with a fixed seat and a spring-biased poppet which is guided for longitudinal movement by an axial guide sleeve and aligns with its seat by pivoting about a fixed point through a small angle of rotation.... | 02/21/1984 |
| 4410109 | Leak detection system and check valve for use therein The leak detection system includes a leak detection sensor for sensing the pressure of fluid product in a supply line and holding the flow rate of the fluid through the supply line to a value below a maximum when the sensed pressure is below a predetermin... | 10/18/1983 |
| 4406302 | Pop-off gas evacuator valve for anesthesia machine A pop-off valve (92) having a significantly improved pressure-flow characteristic and resistance to vibration or "honking." The valve includes a poppet (154) having a flat bottom end wall exposed to pressure and a peripheral lip with a frusto-conical surf... | 09/27/1983 |
| 4395986 | Fuel injection apparatus A fuel injection apparatus is proposed for internal combustion engines with distributor and apportionment valves, which serves to apportion a quantity of fuel proportional to the induced air quantity. The distributor and apportionment valves of the fuel i... | 08/02/1983 |
| 4355657 | Pilot operated relief valve A pilot operated relief valve for use on medium and high pressure vessels, conduits, and the like. A unique two-stage, non-flowing pilot valve (5) operates a main relief valve (7) of substantially greater capacity. Flow control elements provided by 35, 36... | 10/26/1982 |
| 4350176 | Check valve structure A high lift check valve resistant to the flow of abrasive containing fluid therethrough, which valve may be transformed to also act as an excess fluid control valve.... | 09/21/1982 |
| 4312374 | Differential-pressure valve A differential-pressure valve is described including a valve passageway formed through a fixed wall and closable by a valve member displaceable by a differential-pressure sensor biassed to close the valve passageway and subjected to the differential press... | 01/26/1982 |
| 4296307 | Manufacturing method of the valve disk of spring loaded safety valves A manufacturing method of the valve disk of spring loaded safety valves comprising, making its bottom portion as the pressure receiving surface, a cup-shaped center portion having an annular protrusion slightly inwardly from the peripheral edge of its bot... | 10/20/1981 |
| 4276901 | High flow pressure relief valve A fluid pressure relief valve provides automatic venting of a high pressure source to an area of lower pressure in response to pressure build-up of the source. The valve includes a valve body in which a recess is provided, a passage providing communicatio... | 07/07/1981 |
| 4271796 | Pressure relief system for engine brake A pressure relief system for an internal combustion engine compression relief engine brake is disclosed. The pressure relief system comprises a bi-stable ball relief valve associated with the high pressure hydraulic system together with damping means adap... | 06/09/1981 |
| 4226261 | Relief valve A pressure relief valve (10) including a valve stem (34) having an elastomeric valve element (36) received in a counterbore (38) formed in one end thereof and engageable with a valve seat (32) formed in the body (12) of the valve. An annular channel (58) ... | 10/07/1980 |
| 4202369 | Gas relief valve design for low temperature A relief valve is provided with slots across the end of the valve stem where contact is made with the valve body to eliminate gas pressurization in the annular area bounded by circumferential contact between the valve stem and the body and a smaller diame... | 05/13/1980 |
| 4190071 | Backflow prevention devices A backflow prevention device is disclosed which includes a pressure differential relief valve. The relief valve includes a lift chamber functioning to accelerate opening of the valve to assure that the valve fully opens once it has partially opened. The r... | 02/26/1980 |
| 4171005 | Diverter tub spout A diverter tub spout for use in a bathtub installation including a shower head interconnected to a common source of water. A floating valve member is positioned within the spout water passage and is responsive to water pressure to abut a valve seat to clo... | 10/16/1979 |
| 4152893 | Internal combustion engine secondary air control system A secondary air control system for an internal combustion engine having an exhaust system provided with exhaust gas treating means adapted for secondary air injection and including a relief valve includes a mechanism which keeps the relief valve open afte... | 05/08/1979 |
| 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 |
| 4121619 | Tapered valves with conical seats A series of valves with tapered-conical seats including valves such as safety relief or self-regulating in-line check valves which operate without springs but by the use of self-holding tapers which firmly stay in place when seated, the angle of the taper... | 10/24/1978 |
| 4111227 | Pressure relief valve for hydraulic mine supporting elements A pressure relief valve for hydraulic mine supporting elements, particularly mine props, has a valve member loaded in its closing direction by a spring, a piston is connected to the valve member end sealingly sliding within a cylinder of the valve housing... | 09/05/1978 |
| 4091837 | Freezeproof breather valve A valve for controlling the pressure within a tank to prevent excessive above or below atmospheric pressure conditions, including a pressure responsive valve and a vacuum responsive valve, wherein each valve includes a pallet with seals and blowdown rings... | 05/30/1978 |
| 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 |
| 4062336 | Fuel control valve The disclosure illustrates an anti-tampering fuel control valve for a fuel system providing fuel at a regulated pressure to a series of unit injectors on a diesel engine. The injectors are cam actuated to inject fuel quantities related to the pressure of ... | 12/13/1977 |
| 4046163 | Relief valve An improved pressure relief valve for tubeless tires or the like is provided. The pressure relief valve includes a novel poppet valve dust cover structure which will automatically reposition the dust cover after each opening or cycle of the relief valve a... | 09/06/1977 |
| 4022236 | Safety device for a compressed gas tank Safety device for a compressed gas tank comprising a membrane influenced by an elastic effort and resting simultaneously on two concentric seats. It is characterized in that the applying of the pressure to the seat having the smallest diameter corresponds... | 05/10/1977 |
| 4011886 | Sleeve valve A highly responsive valve for exhausting high pressure combustion gases from a closed combustion chamber upon the occurrence of a predetermined pressure is disclosed. A valve housing defines a cylindrical pressure chamber adapted for connection to a combu... | 03/15/1977 |
| 4011848 | Fuel filter and roll-over valve A fuel supply line for an automobile engine extends from a fuel tank to a carburetor and contains an engine driven fuel pump and a poppet type flow check or roll-over valve downstream of the pump, which valve is normally held open by comparatively low pum... | 03/15/1977 |
| 3999528 | Diaphragm valve A diaphragm valve which may serve as an equal pressure valve or as a pressure equalizing valve of a fuel metering and distributing unit for an externally ignited internal combustion engine. The valve has a flexible diaphragm having a clamped diameter and ... | 12/28/1976 |
| 3996957 | Inflator valve with pressure gauge and safety regulator An improvement in an inflator valve, pressure gauge, and automatic pressure-responsive relief valve, all of which are combined into an integral hand-held and operated device for use in high pressure inflating applications.... | 12/14/1976 |
| 3987814 | Flow responsive poppet relief valve A flow responsive poppet relief valve includes a housing having an outlet chamber and an inlet passage opening thereon to define an annular valve seat therebetween, a spool disposed for axial movement in the housing and having a head with a conical nose p... | 10/26/1976 |
