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| Number | Title | Issue Date |
| 4930553 | Pressure relief valve A pressure relief valve comprises a poppet member that is biased toward and sealingly engages a slidable tubular valve seat having unrestrained axial rotation and a central relief flow passage. When the system pressure reaches a threshold pressure the val... | 06/05/1990 |
| 4905729 | Constant pressure type delivery valve for fuel injection pump The invention is a check valve including a valve housing defining a chamber, an inlet and an outlet; a spring holder retained in the chamber and defining a passage providing fluid communication between the chamber and the outlet, one end of the passage op... | 03/06/1990 |
| 4895499 | Outlet valve assembly for paint sprayer Outlet valve assembly for a paint sprayer and the like includes a spring stop engageable by the outlet valve during opening of the outlet valve to dampen the outlet valve movement during opening of the outlet valve. There is a slight initial clearance bet... | 01/23/1990 |
| 4893650 | One way high pressure flow control fittings A jam-proof, high pressure, check-valved input fitting comprising a travel limiting cage for controlling its internal valve spring system to prevent spring bending and cylinderization. A terminal engageably by a high pressure grease source leads to an int... | 01/16/1990 |
| 4852605 | Valve operating without friction A valve which works without friction is provided which includes a movable obturating member and an annular seat. The annular seat is secured to a base by means of a support. The obturating member, preferably a ball, is set in a support which is fixed in t... | 08/01/1989 |
| 4741352 | Adhesive for high temperature thread locking in hydraulic system A heat curable epoxy adhesive composition has been developed which is substantially insoluble in cold hydraulic fluid before it is cured and resistant to degradation in hot hydraulic fluid after it is heat cured. The adhesive comprises a diglycidyl ether ... | 05/03/1988 |
| 4736083 | Microwave heating digestion vessel Microwave digestion vessel of Teflon PFA material including a Teflon PFA vessel with a threaded top and a Teflon PFA cap with internal threads for engaging the vessel threads. A valve assembly extends upwardly from a center portion of the cap and includes... | 04/05/1988 |
| 4722359 | Valve arrangement for high pressure pumps A relief valve for high pressure pumps is described which is characterized by its extremely compact construction and complete reliability against leakage. The relief valve has a valve ball in the bypass path which is pressed by a high and preferably adjus... | 02/02/1988 |
| 4706705 | Check valve A miniaturized check valve comprises a generally tubular body including a cylindrical base and a guide sleeve of reduced diameter which axially extends from the base. The body forms a an interior valve seat which surrounds an axially extending fluid passa... | 11/17/1987 |
| 4692102 | Fuel injection pump for internal combustion engines A pressure valve is proposed herein which is built into the injection pump, its valve closing body being guided in a valve carrier, and arranged to open in the supply direction of the fuel, counter to the force of a restoring spring. A check valve is buil... | 09/08/1987 |
| 4632146 | Relief valve A relief valve adapted for use with either a liquid or gaseous flow stream and comprising a body having a cage member secured thereto and housing all of the working elements of the valve, the cage member being readily removable from and engagable with the... | 12/30/1986 |
| 4622989 | Check valve retainer A positive retainer for assuring maintenance of a desired position of a check valve within a flow path within a body. The retainer is a threaded member which engages threads internally disposed within a hollow plug used to secure a check valve in a non-th... | 11/18/1986 |
| 4613738 | Microwave heating digestion vessel Microwave digestion vessel of Teflon PFA material including a Teflon PFA vessel with a threaded top and a Teflon PFA cap with internal threads for engaging the vessel threads. A valve assembly extends upwardly from a center portion of the cap and includes... | 09/23/1986 |
| 4541412 | Check valve and spring to prevent forward and reverse thermosiphoning in solar collector systems A freeze protection system allows the working fluid contained in the communicating tubes of the solar collector to drain from both the input and output tubes of the collector when a first predetermined temperature of the working fluid is detected and to f... | 09/17/1985 |
| 4531542 | Fluid dampened back pressure regulator A fluid dampened back pressure regulator valve comprising a housing having an inlet port in communication with a fluid pressure source and an outlet port in communication with the inlet port, a valve seat disposed within the housing for cooperation with a... | 07/30/1985 |
| 4503882 | Flow valve A flow valve with a flow passage which exhibits a working flow path (A) and backflow path (R), having a pressure relief valve (18, 20) which consists of a spring-loaded closing device and a valve seat located to shut off the backflow path below a certain ... | 03/12/1985 |
| 4500069 | Hydraulic directional control valve An improvement in ball-type check valve arrangements including a valve body in which is formed a fluid passageway and a valve chamber communicating through a valve seat in the chamber, a ball in the chamber seated in the valve seat, and a reciprocal retai... | 02/19/1985 |
| 4494570 | LP Gas safety valve A fluid flow valve having a rigid tube associated therewith for extending into a tank. In one embodiment, an on-off gas valve includes an extension threadedly mounted thereto with an insert positioned between the extension and valve. A passage extends fro... | 01/22/1985 |
| 4474208 | Safety valve A safety valve formed of a body with a fluid inlet and outlet and a passageway there between having a reduced diameter port providing an internal radial ledge, a cylindrical seat member supported on the internal ledge, the seat member having a circumferen... | 10/02/1984 |
| 4448212 | Check valve for use with high pressure pump A check valve for use with a high pressure sludge pump in which a valve member such as a ball is movable toward and away from a valve seat in the inlet to the valve housing, and which valve has a valve member lift limiter adjustably mounted on the valve b... | 05/15/1984 |
| 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 |
| 4440273 | Aeration preventing shock absorber A shock absorber comprising a cylinder, cylinder head having a relief check valve therein including an annular valve spool, relief valve ball, spring support, valve spring and valve cap, piston, piston head, outer case, foot valve body, dust cover, piston... | 04/03/1984 |
| 4406129 | Saturated cryogenic fuel system A cryogenic fuel system for an internal combustion engine utilizing both the liquid and vapor of a saturated liquid fuel comprising an insulated storage tank having inner and outer walls a vapor tube passing through the walls of the tank with its open end... | 09/27/1983 |
| 4399871 | Chemical injection valve with openable bypass A combination well flow control device having a passage therethrough for conducting fluids from the exterior to the interior of the tubing, this device having pressure responsive valve means therein for controlling flow of fluids such as well treating che... | 08/23/1983 |
| 4393895 | Check valve for use with high pressure pump A check valve for use with a high pressure sludge pump in which a valve member such as a ball is movable toward and away from a valve seat in the inlet to the valve housing, and which valve has a valve member lift limiter adjustably mounted on the valve b... | 07/19/1983 |
| 4372343 | Pressure-retaining valve and method of retaining pressure A cylinder valve is adapted to be mounted on a container storing a pressurized fluid. The cylinder valve has a main gate valve which is selectively operable to control the flow of such fluid. The cylinder valve further includes a pressure-retaining valve ... | 02/08/1983 |
| 4357955 | Electrohydraulic control arrangement An electrohydraulic control arrangement comprising at least one terminal plate having an inlet port connected to a pump pumping fluid under pressure from a tank and an outlet port connected to a return conduit leading to the tank and a plurality of consum... | 11/09/1982 |
| 4310018 | Check valve assembly This invention relates to check valve assemblies in general, and more specifically to an easy opening fuel line check valve assembly, wherein a cage structure which supports a free floating ball valve allows a relatively weak spring to be employed for the... | 01/12/1982 |
| 4217931 | Adjustable check valve A smoothly acting adjustable fluid flow check valve comprises an adjustably spring biased ball valve member, a piston upstream of the ball valve member and having a stem acting as an actuator for the ball valve member and as a further valving member actua... | 08/19/1980 |
| 4178959 | Fluid truck snubber A piston and cylinder motion dampening device having spiral groove metering, an orificed two-way pressure relief valve, a screw-on spring and an over-extension seal retainer.... | 12/18/1979 |
| 4124336 | Poppet check valve for controlled feeding of blowing agent A poppet type check valve for controlled feeding of blowing agent into an assembly for the extrusion of thermoplastic polymeric foam material and, in particular, for controlled feeding of a blowing agent such as pentane into the barrel of an extruder asse... | 11/07/1978 |
| 4112959 | Adjustable check valve A smoothly acting adjustable fluid flow check valve comprises an adjustably spring biased ball valve member, a piston upstream of the ball valve member and having a stem acting as an actuator for the ball valve member and as a further valving member actua... | 09/12/1978 |
| 4080800 | Cryogenic circuit A cryogenic circuit which comprises a tank for the liquid and vapor phase of the cryogen; there being a flow control valve connected at opposite ends to the liquid and vapor sides of said tank with a check valve being interposed between said vapor side an... | 03/28/1978 |
| 4076043 | High fatigue strength check valve A ball type check valve is provided featuring a simple rugged structure which can be easily fabricated and finished to have excellent fatigue strength and resistance to the stresses of continually repeating pressure fluctuations. The key to the success of... | 02/28/1978 |
| 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 |
