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8061381 Sucker rod pump with improved ball and seat  
There is provided a seat assembly for use in a downhole oil pump ball valve. The assembly includes a seat, a seat rest, and a ball. The seat is used for seating the ball of the ball valve. The seat...
7959421 Compressor having a shutdown valve  
A compressor includes a shell, a compression mechanism supported within a suction pressure region of the shell and including a discharge outlet in communication with the discharge chamber, and a...
7874307 Check valve and method of use  
A check valve is shaped and dimensioned to be installable inside a conventional pipe coupling, thereby reducing the amount of length required to install the check valve.
7600532 Check valve having integrally formed seat and seal body  
A valve assembly includes first and second conduits having respective first and second flanges in abutment with each other, a stopper in the second conduit, and a valve body secured between the...
7484526 Sanitary check valve  
A check valve adapted for mounting between any flanges and specifically between sanitary flanges in a piping system, the check valve comprising a stationary portion and a flexible portion; the...
6622795 Flow actuated valve for use in a wellbore  
The present invention generally relates to a flow-actuated valve for use in a wellbore. The invention includes a body having a closing member and a seat. The closing member and seat are separable...
6192926 Safety valve especially for pneumatic circuits  
It comprises a body provided with an inlet and an outlet; a moving gate which separates said inlet and said outlet; a seat formed on said body and adapted for said gate to rest against it; hinge...
6152171 Check valve  
A check valve is positioned in and between opposed tube ends and includes a valve body having a valve seat engageable by a valve element having a stem extending centrally of peripherally spaced...
6123340 Modular flow devices  
The present invention provides a seal for use in a modular flow device and is utilized for joining and aligning a first mating surface and second mating surface having axial flow passageways. The...
6105609 Filtered check valve assembly  
A check valve assembly for an internal combustion engine includes a cup-shaped check valve housing having a cylindrical wall, an open end, and an upstream closed end, to define a chamber. An inlet...
6024121 Check valve  
A check valve having a valve housing with a pair of opposite end faces including an upstream end face and a downstream end face. The valve housing has a fluid passage extending axially therethrough...
6019127 Structure for connecting filler tube to fuel tank  
An inner diameter of a filler tube is formed smaller than that of a filler neck of a tank main body. Hence, a clearance is thus difficult to be created between inner peripheral surface of the...
5960822 Step valve  
The invention concerns a valve arrangement installed in a hydraulic system including a housing (17a, 17b) which is provided with two connections (22, 23) and includes a closing element (14) which...
5950670 Vacuum cup safety device  
A vacuum cup safety device selectively maintains pressure within a vacuum cup for an extended period of time until release of the vacuum is desired. The device includes a housing having first and...
5819792 Check ball valve seat  
A check ball valve seat assembly for a diaphragm pump is provided that includes an annular carrier plate which accommodates an annular seat member. The assembly is sandwiched between two components...
5713389 Check valve and check valve seat  
The present invention is directed to a check valve assembly comprising an upstream body member and a downstream body member which are joined in sealing engagement to thereby form a closed body; a...
5697382 Heart valve assembly method  
A method of assembling a heart valve is provided for use with an inner and a spreadable outer stent. The outer stent is mounted onto a spreading tool including a spreading ring, and expander, and a...
5664602 Check valve for meter run  
A fluid check valve for preventing back flow of fluid through a fluid conduit. The check valve is connected in series with a meter run to enable unrestricted normal flow to occur through a...
5522885 Assembly tooling for an autologous tissue heart valve  
An assembly tool for a bioprosthetic heart valve is disclosed. The tool assembles a valve having an inner and a spreadable outer stent, and includes a spreading ring with an elevated lip to hold...
5522423 Forged body full port swing check valve  
A full port swing check valve having a forged body and providing for the use of a replaceable swing wafer cartridge insert.
5443091 Non-return valve with improved line connecting mechanism  
A non-return valve, particularly adapted for a medium distributor, for example a lubricant distributor, includes a valve body having therethrough a passage for the flow therethrough of a medium....
5411049 Valve  
The present invention, in one embodiment, has a valve body within which is mounted a stem support; a plunger with a stem which is movably mounted for movement in the stem support to move a rounded...
5368069 Conduit joint assembly  
A conduit joint assembly having a pair of tubular flange members for rigidly coupling a pair of conduits together and for supporting a fluid engaging device. One of the tubular flange members has a...
5297579 Ball and seat-type check valve for downhole rod pump  
The plunger of the valve has a semi-spherical valve member of reduced diameter, so that it is inwardly spaced from the ribs of the cage. The plunger is centralized and guided by top and bottom...
5240037 Gas line check valve  
A low pressure gas flow check valve is formed by a relatively thin disc having an central aperture and valve seat is adapted to be interposed between adjacent flanges in a pipeline. The check valve...
5232014 Check valve  
A check valve includes a spherical closing member arranged in a flow duct of a valve body. The flow duct includes guide ribs with stop surfaces. The spherical closing member is displaceable by...
5143117 Break away check valve  
A check valve assembly is disclosed for use with a pool or spa plumbing system and includes first and second hub sections connected together by a nut member. An insert member carrying an...
5117861 Ball and seat-type valve for downhole rod pump  
The plunger of the valve has a ball of reduced diameter, so that it is inwardly spaced from the ribs of the cage. The plunger is centralized and guided by top and bottom stems attached to the ball...
5000223 Swing check valve with secured cage  
A swing check valve wherein the valve seat, cage and disc are in the form of a cartridge having an overall length substantially equal to the length of the valve body. The valve is for use between...
4993452 Low pressure check valve  
An exhaust gas aftertreatment system having an air supply system is disclosed and includes an air feeding pump for selectively creating a flow of air through a flow passage which directs the flow...
4905728 Swing check valve with hinge pin retainer  
A swing check valve where the opposite end portions of the hinge pin of the disc are held in hinge pin recesses by an annular wall in the valve body. The wall in the valve body is sufficiently...
4896695 Check valve  
A check valve having a hollow cylindrical body with a ledge extending around its inner periphery between its ends. A bar extends across the hollow body and is attached at its ends to the ledge. A...
4867200 Unidirectional fluid flow check valve assembly  
A unidirectional fluid flow check valve assembly is ideally suited for controlling gaseous fuel flow to pre-combustion chambers of internal combustion engines. The unidirectional fluid flow check...
4852607 Support for check valve disc  
A swing check valve having a disc where the opposite end portions of the hinge pin of the disc are supported on flat surfaces formed at the opposite ends of a segmented ring surrounding a portion...
4852603 Swing check valve with secured cartridge  
A swing check valve for use between flanges wherein the valve seat and cage for the valve disc extend from the upstream to the downstream ends of the valve body. Cooperating shoulders are provided...
4813451 Swing check valve with removable cartridge  
A replaceable cartridge for a swing check valve which includes the valve seat, disc and hinge pin retainer, wherein the hinge pin retainer is secured in position by deforming a portion of the...
4782855 Check valve seat and cage retainer  
A swing check valve where the cage is a ring-like member supporting the disc or clapper where the disc is loaded from the downstream end of the body and held in operating position by a tubular...
4781212 Swing check valve with removable cage and disc  
A swing check valve having the disc supported in a surrounding cage and constructed with a minimum swinging arc. The cage is designed to permit the swinging movement of the disc through...
4687018 Jacketed valve  
A jacketed valve in which an annular jacket or ring is received over a wafer-type check valve. The ring includes eight axial bores therethrough spaced at 45° intervals to accommodate flange studs ...
4674529 Check valve  
This invention is concerned with a check valve made up of two housings or castings, each of which has a corrosion resistant liner which provides improved support and operation of the ball or check...
4655248 Check valve  
A check valve (22) is provided with a tapered plug (32), freely longitudinally movable with respect to a valve seat surface (34) disposed about the opening of the inlet passage (24). A plurality of...
4633853 Hot water tank check valve  
A valve mechanism especially suited for use in the inlet and outlet conduits of a hot water heater system comprises a pair of cup shaped metallic members positioned within the respective conduit in...
4605041 Check valve  
A check valve comprising a valve body with a bore and a counterbore, an insert inside the counterbore, and a flapper with a flapper pin is disclosed. The flapper pin is mounted in a recess in the...
4598734 Alarm check valve  
An alarm check valve has a tubular body arranged to fit within a pipe line, such as of a sprinkler system. The valve member is pivoted within the body so as to permit one way flow, and is spring...
4586534 Check valve mechanism  
A check valve mechanism providing a valve body and valve seat assembly having noncircular eccentrically located hinge pin receptacles with independently controlled X-axis and Y-axis hinge pin...
4556083 Pressure relief valve and method for modification thereof  
A pressure relief valve operable in large transient pressure conditions includes a valve body. A valve seat is movably mounted on the body. A valve disc or pallet is pivotally connected to the...
4543986 Ball check valve and plate  
A ball check valve assembly for assuring unidirectional flow through a meter run. The valve assembly includes a plate member adapted to be placed between the confronting flanges of a pipeline or...
4532958 Check valve having replaceable valve assembly  
A check valve having improved sealing qualities and provided in the form of a replaceable assembly of a valve member and valve seat to avoid the need to replace the valve housing. The sealing...
4531543 Uni-directional flow, fluid valve  
The valve has a seat and plate coupled together to define a shallow chamber therebetween, and a thin, metal, valving disc is freely movable, through the chamber, between the seat and plate. The...
4488566 Thermally responsive slam shut valve assembly  
A thermally responsive slam shut valve assembly includes a generally tubular body member having an internal valve seat at one end, a spider member connected to the other end of the body member, a...
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