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Class 137/515 - In couplings for coaxial conduits, e.g., drill pipe check valves


Subclass of Class 137 - Fluid handling
Definition: Valves in which the valve is associated with or mounted
No. of patents: 66
Last issue date: 09/02/2008


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NumberTitleIssue Date
7419012Wellbore top drive systems
A drive system for wellbore operations, the drive system, in certain, but not necessarily all aspects, including a main body, a motor apparatus, a main shaft extending from the main body and rotatable by the motor, the main shaft having a top end and a bottom end, a...
09/02/2008
7392828Insertion part for inserting into a gas or liquid line
An insertion part is provided in the form of a back-flow preventer and which can be inserted in a gas or liquid line. An insertion part is also provided that can be inserted into a gas or liquid line in the form of a flow regulator. The insertion parts are character...
07/01/2008
7318592Motorcycle steering damper
According to the invention, there is provided a steering damper (10) in which the interior of a cylinder (12) is divided into two oil chambers (A), (B) by a piston (14) which slides in the cylinder (12) as a steering operation takes place...
01/15/2008
7314238Fluid connection
A fluid connection comprised of a first fitting having a body with a first end and a second end. A passage extends through the body from the first end to the second end. A bracket is mounted to the second end of the body. The bracket defines a space adjacent the sec...
01/01/2008
7302971Umbrella valve and assembly
An umbrella valve includes an umbrella-valve body having a stem, a flexible umbrella, and a flange. The umbrella and the flange are each attached to, and extend radially outward from, the stem. The flange has at least one fluid passage. The umbrella valve can be pla...
12/04/2007
7243682Annular one-way valve
A one-way valve with an annular nozzle. The valve body is a truncated cone with an interior fluid manifold. The truncated cone section includes a lower retaining groove and a fluid groove. A fluid conduit connects the interior fluid manifold to the fluid groove. An ...
07/17/2007
7234480Telescopic snap valve
A telescopic snap valve assembly and method of assembling a snap valve with a liquid holding bag in a box fitting. The valve assembly includes a valve member having a lower protruding telescopic end with a raised exterior lower edge. The telescopic end of the valve ...
06/26/2007
7234529Flow switchable check valve and method
According to one embodiment of the invention, a flow switchable check valve includes a housing, a guide member having a bore extending therethrough disposed within the housing, and a poppet having a head and a stem. The head has an upstream surface engaged with a se...
06/26/2007
7222637Connector equipped with a valve
A connector housing of a valve-equipped connector is integrally formed from a tube connection section at a first axial side; a pipe insertion section at a second axial side; and a valve housing section between the tube connection section and the pipe insertion secti...
05/29/2007
7219690Flow control valve
A two-stage fluid pressure control valve has five components. An inlet socket with separate fluid flow orifices sealably engages an outlet socket which also has separate fluid flow orifices. A pressure check piston having a fluid flow orifice along its longitudinal ...
05/22/2007
7198061Valve
Hydraulically or pneumatically controlled seat valve (2), in particular a pressure control valve, having a valve seat (10) formed in a base part (4) which cooperates with the sealing surface of a valve body (8) displaceably disposed in a ...
04/03/2007
7171981Flow control device and system
A flow control valve has a ball and an annular seat providing a positive stop for automatically preventing flow through the valve when a line downstream has been broken. The flow control valve is useful for interior applications in which seepage through the valve wo...
02/06/2007
7040669Fuel feeding pipe
A fuel feeding pipe having a first feed oil pipe extending from an oil filler port, a second feed oil pipe projecting from a fuel tank, and a tightening belt for connecting and tightening these oil pipes together, comprising an outer fitting pipe provided to the fir...
05/09/2006
7028981Non-return valve
A non-return valve (10), typically of commonly called duckbill valve shape, comprising a valve body (12) and a valve membrane (14). The valve body (12) is generally tubular and includes an elongate passageway (16) with inlet (18...
04/18/2006
6988510Disc check valve
A free floating disc check valve is provided by the present application. The check valve includes a seal disc having an integral truncated torroidal shaped portion. The torroidal shaped portion provides structural rigidity to the seal disc to minimize deflection of ...
01/24/2006
6969013High pressure fluid spraying apparatus
This invention relates to equipment and a method for providing superior power washing at relatively low pressures. The equipment uses a unique mixing chamber wherein a pressurized water stream is mixed with a pressurized additive stream. For example, the additive st...
11/29/2005
6932100Flapper type fill tube check valve
A flapper valve for push-in snap-lock attachment to a spud to be welded to a fuel tank and attached to a flexible filler tube hose. The flapper has an annular flexible seal overmolded thereon, preferably of elastomeric material. The flapper has a pair of trunnions, ...
08/23/2005
6929023Back flow prevention device for pipelines conveying fluids
A back flow prevention device is shown for use in a plastic pipeline for conveying water, sewage, hydrocarbons or other fluids. A valve body features a flow control mechanism which is formed entirely or primarily of plastic materials. The valve body and its opposing...
08/16/2005
6902208Gas impermeable tube joint and method of forming same
A method of forming a gas impermeable joint in a fluid system includes: providing a tube having a metallic barrier layer disposed between an inner plastic layer and an outer plastic layer; forcing at least one of the inner plastic layer and the outer plastic layer i...
06/07/2005
6851448Rotary connector with valve
A rotary connector with valve, comprising first and second connector members (1, 2) having connector terminal parts (5, 6) and fitting parts (7, 8) with hollows (3, 4) as fluid passages formed therein and a valve member (12), where...
02/08/2005
6453941Pipe tubular element comprising a rigid longitudinal portion and a flexible longitudinal part in one single piece
A pipe element possessing a longitudinal axis (2) along which a rigid tubular part (3) and a flexible tubular part (4), together constituting a single piece, extend. The rigid part (3) has one end presenting a substantially radial connection surface (8) f...
09/24/2002
6382244Reciprocating pump standing head valve
A circular check valve with a central aperture is disclosed. The preferred use as a standing head valve for reducing hydrostatic pressure in a wellbore being produced by a reciprocating pump is discussed. In this application the circular check valve allow...
05/07/2002
6240957Backward flow prevention valve
A back flow preventing valve is formed of a valve main body and a valve member. The valve main body includes a fluid inlet at one side, a fluid outlet at the other side having a valve seat at an end surface thereof, a flange extending outwardly from an ou...
06/05/2001
6227299Flapper valve with biasing flapper closure assembly
A flapper valve assembly (110) having a biasing flapper closure assembly (102) is disclosed. The flapper valve assembly (110) comprises tubular valve housing (94) having a hinge (100) and a longitudinal hole (104). A valve seat (92) is mounted within the ...
05/08/2001
5799689Tubular refrigerant check valve with idented outer housing portion
A check valve connectable in a refrigerant line is economically fabricated from only three parts--(1) a copper tubing body connectable in the refrigerant line, (2) a nonmetallic shutoff ball, and (3) an annular valve seat member having a conically tapered...
09/01/1998
5797147Spill-resistent urinal
A urinal for men who cannot use a toilet or are otherwise incapacitated has a canister with a removable spout. A manual seal in the spout can be manipulated between open and closed positions by a trigger on the exterior of the spout, and locked into the o...
08/25/1998
5794661Tank isolation valve
A tank isolation valve assembly for use in an effluent discharge path to provide a vapor barrier to prevent back flow of gases while enabling fluid and solid substances to pass through in a desired flow direction. The assembly includes a main housing havi...
08/18/1998
5595368Apparatus for preventing slippage in pipe couplings
An apparatus for preventing slippage of the ends of pipes, which may be broken, from within a Dresser-type coupling utilized for mending such breaks. A slip stop ring member is provided for preventing slippage of a washer to the end of the pipe....
01/21/1997
5592966Back-flow preventer
The present invention is directed to a multi-cuspid back-flow preventer in the nature of a check valve that has a generally annular body portion with axially spaced upstream and downstream ends. A substantially cylindrical passageway extends through the b...
01/14/1997
5382142Wall pump having backwash valve actuator
A backwash valve for use in a sucker-rod actuated fluid pump, may be selectively actuated to permit both the standing and traveling ball valves to be unseated at the same time permit the pump to be backwashed and/or the production tubing string drained....
01/17/1995
5365906Fluid flow check valve for fuel system
A fluid flow check valve assembly having a tubular valve housing with opposite inlet and outlet end portions and a movable valve member therebetween. The valve member has an end sealing portion engageable with an inlet seating portion of the housing and a...
11/22/1994
5340291Flow restraining device for a thick matter conveying apparatus
An apparatus for conveying thick matter is provided including a delivery line, a thick matter pump connected to the delivery line for conveying thick matter from the pump through the delivery line in an output direction, and a restraining member positione...
08/23/1994
5318063Fluid check valve with replaceable valve seat and flapper assembly
A fluid check valve of the two flapper variety which has replaceable seat flapper assembly. The assembly comprises a tubular ring having a seating area on the surface of one end and a reduced diameter portion on the other end. A pair of pin keepers are at...
06/07/1994
5222519Reverse-flow prevention device for fuel tank
The present invention relates to a reverse-flow prevention device for a fuel tank of an automobile which is provided between a filler port and the fuel tank in the automobile. The reverse-flow prevention device of the invention comprises a valve body of w...
06/29/1993
5176165Air gap apparatus
An air gap apparatus particularly adapted for use in reverse osmosis (RO) units in which reject water must be carried off to a drain line. The apparatus is adapted for incorporation in an RO unit as original equipment or for addition later as an after mar...
01/05/1993
5172721Check valve for fuel tank
Even if a bellows is provided in the vicinity of a fuel check valve to be installed between a fuel filler port and a tank, the valve can be operated stably with a structure in which a valve body of the check valve comprises an annular main body section an...
12/22/1992
5159953Check valve apparatus for fuel tank
A check valve apparatus for a fuel tank of an automobile or the like compries only two members, i.e., a valve plate made of synthetic resin which is integral with rotating rod members and a valve body made of synthetic resin and having an annular configur...
11/03/1992
5159981Flapper valve
A flapper valve assembly when closed permits flow through in one direction and prevents flow in the opposite direction. When open, two way flow may occur and the flapper valve member is biased toward closed position, to sealingly engage an annular seat, b...
11/03/1992
5123591Radiator hose with internally mounted thermostat
An improvement in devices for the thermostatic control of engine coolant comprises a radiator hose with an internally mounted thermostatic valve. In one embodiment of the improved device, a flexible hose has a radially inwardly projecting annular flange o...
06/23/1992
5065791Fluid purifying apparatus and method of purifying fluids
A check valve for a fluid conduit line including a spaced break in a fluid conducting line with a chamber defining sleeve connecting opposed ends of the broken fluid line, the chamber having a float fluid check valve disposed therein of a specific gravity...
11/19/1991
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