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Publication numberUS3692041 A
Publication typeGrant
Publication dateSep 19, 1972
Filing dateJan 4, 1971
Priority dateJan 4, 1971
Also published asCA938859A, CA938859A1, DE2148259A1
Publication numberUS 3692041 A, US 3692041A, US-A-3692041, US3692041 A, US3692041A
InventorsPasquale Columbo Bondi
Original AssigneeGen Electric
Export CitationBiBTeX, EndNote, RefMan
External Links: USPTO, USPTO Assignment, Espacenet
Variable flow distributor
US 3692041 A
Abstract
A variable flow distributor for disbursing contaminated fluids through a plurality of metering orifices, wherein the metering area of each orifice is uniformly regulated by offsetting the coaxial alignment of a pair of holes through adjacent movable partitions, such that seizure of the moving partitions from contaminants entering the area therebetween is prevented by the introduction of highly filtered fluid from conduit means which surround each orifice.
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United States Patent Bondi [54] VARIABLE FLOW DISTRIBUTOR [72] Inventor: Pasquale Columbo Bondi, Revere,

Mass.

[73] Assignee: General Electric Company [22] Filed: Jan. 4, 1971 [21] Appl. No.: 103,600

[52] US. Cl. ..l37/238, l37/246.12, l37/625.47 [51] Int. Cl ..Fl6k 5/22 [58] Field of Search.l37/237, 238, 240, 246, 246.11,

[56] References Cited UNITED STATES PATENTS 2,641,280 6/1953 Fleischhauer.....137/625.ll X 2,734,523 2/1956 Wiggans ..l37/238 2,774,363 12/1956 Benzien ..l37/240 X 51 Sept. 19, 1972 Webster ..137/238 Brooks ..137/240 Primary Examiner-M. Cary Nelson Assistant Examiner--Richard Gerard Attorney-Edward S. Roman, Derek P. Lawrence, Frank L. Neuhauser, Oscar B. Waddell and Joseph B. Forman [5 7] ABSTRACT A variable flow distributor for disbursing contaminated fluids through a plurality of metering orifices, wherein the metering area of each orifice is uniformly regulated by offsetting the coaxial alignment of a pair of holes through adjacent movable partitions, such that seizure of the moving partitions from contaminants entering the area therebetween is prevented by the introduction of highly filtered fluid from conduit means which surround each orifice.

4 Claims, 3 Drawing Figures PATENTEDSEP 19 I972 INVENTOR. PASQUALE c. BOND! EMA Kw BACKGROUND OF THE INVENTION The present invention has particular application in the fuel control systems of jet engines wherein it is important to feed equal amounts of fuel to a multiple of burners in the. engine, and wherein the fuel must be carefully regulated so that flow to each burner starts simultaneously and is kept at various uniform flow ratios.

The equal distribution of fuel to jet engine burners may be accomplished by flowing fuel through a chamber such that the output flow is diverted through a series of metering orifices all of which may be adjusted simultaneously, allowing the same uniform rate of flow through each orifice. A simple yet highly effective metering orifice may be formed by two opposing walls, wherein each wall contains a hole of predetermined size and one partition is adapted to slide over the surface of the opposing partition such that the two holes cooperate to form a metering orifice. The metering orifice may be fully opened by sliding one of the walls into the position required for coaxial alignment of the holes, or alternatively the metering orifice maybe closed by fully offsetting the holes from each other with all ranges of orifice opening existing therebetween.

In a practical fuel distribution system for jet engines, however, the fuel is normally contaminated by undesirable particles. These contaminants tend to lodge between the moving walls of the fuel control system causing sticking and seizure of such members. Seizure and wear could be prevented by filtering all of the fuel undergoing distribution; however, this would prevent high flow rates since a filter small enough to remove the smallest contaminants would impose .high pressure drops upon the system.

An alternate solution would be to remove a negligible amount of finely filtered wash fuel from the main flow path at a point upstream of the flow distributor, and introduce it between the slidable walls which define the metering orifices. The present state of the art relative to such systems however has not provided for a uniform flow of wash fuel across the circumferential edge of each orifice. Unless such a uniform flow is provided, contaminants will still have a tendency to lodge between the moving surfaces which define the metering orifice, and if spaced apart metering orifices are incorporated within the same moving members, a further tendency will exist for contaminated fuel to flow between metering orifices.

Therefore, it is an object of this invention to provide a variable flow distributor having the capability of channeling contaminated fuel through a plurality of metered orifices without sticking or seizure of the moving members.

It is also an object of this invention to provide a variable fuel flow distributor having a plurality of metering orifices wherein possible contamination paths between the orifices are eliminated.

SUMMARY A variable flow distributor is provided in accordance with this invention for uniformly disbursing fluids such as jet engine fuel that may have contaminating matter therein.

The variable flow distributor of this invention includes a plurality of meteringorifices formed by a first wall member having a plurality of holes therethrough, through which the flow of contaminated fuel is directed. A second wall member overlies the first wall member and includes a plurality of holes for alignment with the holes of the first wall member such that the holes of the first wall member cooperate with the holes of the second wall member to form a plurality of metering orifices. Actuating means are provided for offsetting the coaxialalignment of the holes of the first and second wall members, thereby further restricting the flow of contaminated fuel through each metering orifice.

Highly filtered wash fuel is provided for keeping the area between the wall. members free of contaminants, thereby preventing binding or seizing. A bypass located upstream of the flow distributor filters a portion of the contaminated fuel and conducts it to the opposing surfaces of the wall members. Grooves contained in either opposing wall surface or in both surfaces direct a uniform flow of filtered fuel around each metering orifice, such thatthere. is a substantially uniform flow of filtered fuel from the grooves towards the central axis of each metering orifice and across the entire circumferential edge of each hole which cooperates to form a metering orifice, thereby eliminating any possibility of contaminants lodging between the moving members.

The first wall member could comprise a hollow spool with a plurality of radially and longitudinally spaced apart holes therethrough, with the fiow of unfiltered fuel directed into the hollow center and out through the holes in the side thereof. The second wall member would be a hollow sleeve closely fitted around the outer diameter of the spool and having a plurality of radially and longitudinally spaced apart holes therethrough for alignment with the holes of the spool. The variable flow distributor may be actuated by either rotating the spool about its longitudinal axis or sliding the spool along its longitudinal axis, thereby offsetting the coaxial alignment of the holes forming the metering orifices and restricting flow therethrough.

BRIEF DESCRIPTION OF THE DRAWING FIG. 1 shows a cross-sectional view of the preferred variable flow distributor of this invention.

FIG. 2 shows a side view of the spool of FIG. 1 with its reticulated surface contour.

DESCRIPTION OF THE PREFERRED EMBODIMENT FIG. 1 shows a cross-sectional view of a typical embodiment of a flow distributor as may be incorporated in the fuel system of a gas turbine aircraft engine. Aircraft gas turbines are designed to burn various hydrocarbons ranging in grade from kerosene to high octane gasolines, and these fuels may be contaminated by gritilike impurities, such as rust and dirt. Contaminated fuel enters the hollow cylindrical housing of the variable flow distributor through the inlet port 11. A fine filter 12 is mounted in the inlet port and there is a chamber 14 surrounding the filter. A portion of the fuel from the inlet port passes through the filter and chamber 14 through passageway 16 into cylindrical chamber 18.

Meanwhile the remainder of the unfiltered fuel flows through passageway 20 and into the hollow central portion 22 of the rotatably operated spool 24. The flow of contaminated fuel is then equally distributed through the radially and axially spaced apart holes 26 located in the side of spool 24.

Spool 24 may be mechanically rotated about its axis through rod 28 which is pinned at 30 to the spool 24 to actuate the same. The actuating means for the rod 28 are not shown, but in a typical gas turbine engine may include a manually operated linkage interconnected with various types of low force automatic actuators for temperature, pressure and speed connections.

I-Iollow cylindrical sleeve 32 includes radially and axially spaced apart output holes 34 through the side thereof. The output holes 26 through the spool 24 cooperate with the opposing output holes through sleeve 32 to form metering orifices. The flow of contaminated fuel through the metering orifices is controlled by actuating means which arcuately rotate rod 28. When the metering orifices are fully opened, the output holes 26 of the spool are radially and axially aligned with the output holes 34 of the sleeve. Arcuately rotating rod 28, causes spool 24 to rotate about its central axis offsetting the radial alignment of the output holes 26 of the spool with the output holes 34 of the sleeve, thereby simultaneously restricting the flow of contaminated fuel through each metering orifice. The distributed output fuel is discharged through output ports 36 in housing 10.

The rubbing surfaces of the spool 24 and the sleeve 32 are provided with a finely filtered flow of washing fuel through passage 16. FIG. 2 illustrates the contour of the outside surface of spool 24, and further shows one configuration for the arrangement of an 8 hole spool for uniformly distributing fuel to 8 burners. The spool alternatively could contain any number of holes depending on the number of burners serviced by the flow distributor.

The areas at the circumferential edges 38 at both ends of spool 24 are highly machined for a close tolerance fit with the inner diameter of sleeve 32, thereby acting as a seal between the highly filtered wash fuel and contaminated fuel. A small portion of wash fuel, however, does flow in the finite space between the circumferential edges 38 and the inner surface of sleeve 32, cleaning the rubbing surfaces and preventing seizure of the moving parts.

Highly filtered wash fluid exits from passage 16 into annular groove 40 on spool 24. Annular groove 40 uniformly distributes the filtered wash fuel to the longitudinal grooves 42 which are further intersected by additional annular grooves 44. The longitudinal and annular grooves surround each hole 26 on the surface of spool 24 so as to define a reticulated surface contour thereby insuring a uniform flow'of filtered wash fuel around each hole. Holes 26 on the spool. cooperating with holes 34 on the sleeve to form the metering orifices, effect reductions in the pressure of fuel flowing therethrough. The reduced pressure at the metering orifices causes filtered wash fuel to uniformly flow from the surrounding annular and longitudinal grooves toward the metering orifices and back into the unfiltered flow of fuel. The filtered wash fuel flows between the close fitting surfaces of the spool and sleeve maintaining the flow pattern as illustrated by the arrows of FIG. 2, thereby keeping the surfaces washed or bathed free of any grit-like impurities that may be present in the main flow path through the metering orifices. The filtered wash fuel prevents wear and possible seizure of the spool 24 and sleeve 32.

The annular and longitudinal grooves around each metering orifice effect a substantial improvement over prior art systems by insuring a uniform flow of filtered wash fuel over the circumferential edges of all the holes that define the metering orifices. If the flow of filtered wash fuel over the entire circumferential edge of each hole was not uniform, grit or impurities from the contaminated fuel could lodge between the closely fitted surfaces at those areas along the circumferential edges where filtered wash flow is reduced or lacking, thereby causing sticking or seizure. The annular and longitudinal grooves around each orifice also isolate the orifices from each other eliminating any possible contamination paths between the orifices. The grooves further insure that the filtered wash fuel is uniformly distributed to each metering orifice, no matter how far the metering orifice may be from the inlet passage 16.

FIG. 3 shows a cross-sectional view of sleeve 32 embodying an alternate scheme for incorporating the grooves into the inside surface of sleeve 32. Highly filtered wash fluid would exit form passage 16 into annular groove 46 on the inside surface of the sleeve. Annular groove 46 uniformly distributes the filtered wash fuel to the longitudinal grooves 48 which are further intersected by additional annular grooves 50. The longitudinal and annular grooves surround each hole 34 on the inside surface of sleeve 32 so as to define a reticulated surface contour thereby insuring a uniform flow of filtered wash fuel around each hole. Sleeve 32 as shown in FIG. 3 could be used in combination with the spool of FIG. 2 wherein the longitudinal and annular grooves of the spool and sleeve would be aligned in substantially opposing relation.

Alternatively, it should be understood that the cylindrical spool 24 could be actuated by axially sliding the spool along its central axis, which also would simultaneously offset the opposing holes and uniformly restrict flow through each metering orifice.

The preferred embodiment of the invention has been described fully as applied to an aircraft gas turbine fuel system because the invention was conceived in an effort to overcome failures in such systems that were experienced as a result of impurities in the fuel. It should be obvious that the invention may be applied to any type of fluid transfer system wherein minute particulate matter is present in the fluid being transferred, and wherein it is desirable to protect the variable flow distributor from the particulate matter.

What is claimed is:

l. A variable flow distributor for uniformly dispersing fluids that may have contaminated matter therein comprising a housing;

inlet means for conducting the field into the housing;

a hollow sleeve disposed within the housing and having a plurality of radially and longitudinally spaced apart holes therethrough;

a hollow spool movably disposed within the hollow sleeve and having a plurality of radially and longitudinally spaced apart holes therethrough for cooperation with the holes of the sleeve to form variable metering orifices such that fluid may be directed into the hollow center of the spool and out through the metering orifices;

bypass means upstream of the housing for filtering a portion of the fiuid and channeling the filtered fluid to'between the opposing surfaces of the sleeve and spool;

conduit means as defined by the contour of the opposing surfaces of the sleeve and spool for receiving the filtered fluid and directing a uniform and continuous flow of filtered fluid entirely around each orifice independent of the metered orifice opening such that there is a substantially uniform and continuous flow of filtered fluid from the conduit means towards the central axis of each metering orifice and across the entire circumferential edge of each hole which cooperates to form a metering orifice for all variable metered orifices between full open and closed; and

outlet means for conducting the fluid from each metering orifice.

2. The variable flow distributor of claim 1 wherein the conduit means includes a series of intersecting grooves in the opposing surface of the sleeve, with the grooves so arranged as to completely surround each hole of the sleeve thereby forming a reticulated surface contour.

3. The variable flow distributor of claim I wherein the conduit means includes a series of intersecting grooves in the opposing surface of the spool, with the grooves so arranged as to completely surround each hole of the spool thereby forming a reticulated surface contour.

4. The variable flow distributor of claim 1 including actuator means having a rod for rotating the spool about its axis.

UNITED STATES PATENT OFFICE I CERTIFICATE OF CORRECTION v Patent No. 3,692,041 Dated September 19, 1.972

ln en fl Pasquale Columbo Bondi It is certified that error appears in the above-identified. patent and that said Le'ttersPatent are hereby corrected as shown below:

Column 5, line 4, "field" should read fluid Column 6 line 22, "actuator" should read actuating Signed and sealed this 1st day of May 19-73.

(SEAL)- Attest:

EDWARD M.FLETCHER,JR

ROBERT GOTTSCHALK Attesti ng Officer Commissioner of Patents USCOMM-DC 60876-P69 U.S. GOVERNMENT PRINTING OiFFlCE: I965 0-366-334,

Patent Citations
Cited PatentFiling datePublication dateApplicantTitle
US2641280 *Jun 23, 1948Jun 9, 1953Fleischhauer Henry GAutomatic control valve for branch pipe lines
US2734523 *Jul 24, 1952Feb 14, 1956 Protective
US2774363 *Feb 28, 1952Dec 18, 1956Colgate Palmolive CoValve operation
US2928412 *Oct 22, 1956Mar 15, 1960Parker Hannifin CorpEight port distributor valve
US3026894 *Aug 15, 1958Mar 27, 1962Sun Oil CoSlurry stop plug
Referenced by
Citing PatentFiling datePublication dateApplicantTitle
US3819296 *Mar 6, 1972Jun 25, 1974Mitsubishi Heavy Ind LtdControl for hydraulic machine having adjustable blades
US3833018 *Feb 21, 1973Sep 3, 1974Pass Port Syst CorpLow leakage vacuum valve and chamber using same
US4298026 *Dec 17, 1979Nov 3, 1981Instrumentation Laboratory Inc.Spool valve
US4561469 *Jan 23, 1984Dec 31, 1985Aisin Seiki Kabushiki KaishaElectromagnetic control valve
US5031656 *May 31, 1990Jul 16, 1991Chrysler CorporationReciprocating valves in a fluid system of an automatic transmission
US5816290 *Mar 13, 1996Oct 6, 1998Fleck Controls, Inc.Rotary control valve for a water conditioning system
US5901737 *Jun 24, 1996May 11, 1999Yaron; RanRotary valve having a fluid bearing
US6185757Jun 24, 1999Feb 13, 2001Saratoga Spa & Bath Co., Inc.Manual control of water delivery through ports of tub, spa or shower
US6280000Nov 20, 1998Aug 28, 2001Joseph A. ZupanickMethod for production of gas from a coal seam using intersecting well bores
US6357523Nov 19, 1999Mar 19, 2002Cdx Gas, LlcDrainage pattern with intersecting wells drilled from surface
US6412556Aug 3, 2000Jul 2, 2002Cdx Gas, Inc.Cavity positioning tool and method
US6425448Jan 30, 2001Jul 30, 2002Cdx Gas, L.L.P.Method and system for accessing subterranean zones from a limited surface area
US6439320Feb 20, 2001Aug 27, 2002Cdx Gas, LlcWellbore pattern for uniform access to subterranean deposits
US6454000Oct 24, 2000Sep 24, 2002Cdx Gas, LlcCavity well positioning system and method
US6478085Feb 20, 2001Nov 12, 2002Cdx Gas, LlpSystem for accessing subterranean deposits from the surface
US6490740Feb 3, 2000Dec 10, 2002Saratoga Spa & Bath Co., Inc.Motorized control of water delivery through ports of tub, spa or shower
US6561288Jun 20, 2001May 13, 2003Cdx Gas, LlcMethod and system for accessing subterranean deposits from the surface
US6575235Apr 15, 2002Jun 10, 2003Cdx Gas, LlcSubterranean drainage pattern
US6598686Jan 24, 2001Jul 29, 2003Cdx Gas, LlcMethod and system for enhanced access to a subterranean zone
US6604580Apr 15, 2002Aug 12, 2003Cdx Gas, LlcMethod and system for accessing subterranean zones from a limited surface area
US6662384Oct 29, 2002Dec 16, 2003Saratoga Spa & Bath Co., Inc.Motorized control of water delivery through ports of tub, Spa of shower
US6662870Jan 30, 2001Dec 16, 2003Cdx Gas, L.L.C.Method and system for accessing subterranean deposits from a limited surface area
US6668918Jun 7, 2002Dec 30, 2003Cdx Gas, L.L.C.Method and system for accessing subterranean deposit from the surface
US6679322Sep 26, 2002Jan 20, 2004Cdx Gas, LlcMethod and system for accessing subterranean deposits from the surface
US6681855Oct 19, 2001Jan 27, 2004Cdx Gas, L.L.C.Method and system for management of by-products from subterranean zones
US6684722 *Jul 7, 2000Feb 3, 2004Rob G. ParrishAviatorial valve assembly
US6688388Jun 7, 2002Feb 10, 2004Cdx Gas, LlcMethod for accessing subterranean deposits from the surface
US6708764Jul 12, 2002Mar 23, 2004Cdx Gas, L.L.C.Undulating well bore
US6725922Jul 12, 2002Apr 27, 2004Cdx Gas, LlcRamping well bores
US6732792Feb 20, 2001May 11, 2004Cdx Gas, LlcMulti-well structure for accessing subterranean deposits
US6848508Dec 31, 2003Feb 1, 2005Cdx Gas, LlcSlant entry well system and method
US6942030Feb 11, 2004Sep 13, 2005Cdx Gas, LlcThree-dimensional well system for accessing subterranean zones
US6957451Nov 3, 2003Oct 25, 2005Saratoga Spa & Bath, Inc.Flow control device for tub, spa, or shower
US6964298Jan 20, 2004Nov 15, 2005Cdx Gas, LlcMethod and system for accessing subterranean deposits from the surface
US6964308Oct 8, 2002Nov 15, 2005Cdx Gas, LlcMethod of drilling lateral wellbores from a slant well without utilizing a whipstock
US6976533Aug 15, 2003Dec 20, 2005Cdx Gas, LlcMethod and system for accessing subterranean deposits from the surface
US6986388Apr 2, 2003Jan 17, 2006Cdx Gas, LlcMethod and system for accessing a subterranean zone from a limited surface area
US6988548Oct 3, 2002Jan 24, 2006Cdx Gas, LlcMethod and system for removing fluid from a subterranean zone using an enlarged cavity
US6991047Jul 12, 2002Jan 31, 2006Cdx Gas, LlcWellbore sealing system and method
US6991048Jul 12, 2002Jan 31, 2006Cdx Gas, LlcWellbore plug system and method
US7025137Sep 12, 2002Apr 11, 2006Cdx Gas, LlcThree-dimensional well system for accessing subterranean zones
US7025154Dec 18, 2002Apr 11, 2006Cdx Gas, LlcMethod and system for circulating fluid in a well system
US7036584Jul 1, 2002May 2, 2006Cdx Gas, L.L.C.Method and system for accessing a subterranean zone from a limited surface area
US7048049Oct 30, 2001May 23, 2006Cdx Gas, LlcSlant entry well system and method
US7073595Sep 12, 2002Jul 11, 2006Cdx Gas, LlcMethod and system for controlling pressure in a dual well system
US7090009Feb 14, 2005Aug 15, 2006Cdx Gas, LlcThree-dimensional well system for accessing subterranean zones
US7100687Nov 17, 2003Sep 5, 2006Cdx Gas, LlcMulti-purpose well bores and method for accessing a subterranean zone from the surface
US7131460 *Oct 1, 2003Nov 7, 2006Ranco Incorporated Of DelawareAutomotive coolant control valve
US7134494Jun 5, 2003Nov 14, 2006Cdx Gas, LlcMethod and system for recirculating fluid in a well system
US7163063Nov 26, 2003Jan 16, 2007Cdx Gas, LlcMethod and system for extraction of resources from a subterranean well bore
US7207390Feb 5, 2004Apr 24, 2007Cdx Gas, LlcMethod and system for lining multilateral wells
US7207395Jan 30, 2004Apr 24, 2007Cdx Gas, LlcMethod and system for testing a partially formed hydrocarbon well for evaluation and well planning refinement
US7213644Oct 14, 2003May 8, 2007Cdx Gas, LlcCavity positioning tool and method
US7222670Feb 27, 2004May 29, 2007Cdx Gas, LlcSystem and method for multiple wells from a common surface location
US7264048Apr 21, 2003Sep 4, 2007Cdx Gas, LlcSlot cavity
US7299864Dec 22, 2004Nov 27, 2007Cdx Gas, LlcAdjustable window liner
US7353877Dec 21, 2004Apr 8, 2008Cdx Gas, LlcAccessing subterranean resources by formation collapse
US7360595May 8, 2002Apr 22, 2008Cdx Gas, LlcMethod and system for underground treatment of materials
US7373984Dec 22, 2004May 20, 2008Cdx Gas, LlcLining well bore junctions
US7419223Jan 14, 2005Sep 2, 2008Cdx Gas, LlcSystem and method for enhancing permeability of a subterranean zone at a horizontal well bore
US7571771May 31, 2005Aug 11, 2009Cdx Gas, LlcCavity well system
US8291974Oct 23, 2012Vitruvian Exploration, LlcMethod and system for accessing subterranean deposits from the surface and tools therefor
US8297350Oct 31, 2007Oct 30, 2012Vitruvian Exploration, LlcMethod and system for accessing subterranean deposits from the surface
US8297377Jul 29, 2003Oct 30, 2012Vitruvian Exploration, LlcMethod and system for accessing subterranean deposits from the surface and tools therefor
US8316966Nov 27, 2012Vitruvian Exploration, LlcMethod and system for accessing subterranean deposits from the surface and tools therefor
US8333245Dec 18, 2012Vitruvian Exploration, LlcAccelerated production of gas from a subterranean zone
US8371399Feb 12, 2013Vitruvian Exploration, LlcMethod and system for accessing subterranean deposits from the surface and tools therefor
US8376039Feb 19, 2013Vitruvian Exploration, LlcMethod and system for accessing subterranean deposits from the surface and tools therefor
US8376052Feb 19, 2013Vitruvian Exploration, LlcMethod and system for surface production of gas from a subterranean zone
US8434568May 7, 2013Vitruvian Exploration, LlcMethod and system for circulating fluid in a well system
US8464784Jun 18, 2013Vitruvian Exploration, LlcMethod and system for accessing subterranean deposits from the surface and tools therefor
US8469119Oct 31, 2007Jun 25, 2013Vitruvian Exploration, LlcMethod and system for accessing subterranean deposits from the surface and tools therefor
US8479812Oct 31, 2007Jul 9, 2013Vitruvian Exploration, LlcMethod and system for accessing subterranean deposits from the surface and tools therefor
US8505620Oct 31, 2007Aug 13, 2013Vitruvian Exploration, LlcMethod and system for accessing subterranean deposits from the surface and tools therefor
US8511372Oct 31, 2007Aug 20, 2013Vitruvian Exploration, LlcMethod and system for accessing subterranean deposits from the surface
US8813840Aug 12, 2013Aug 26, 2014Efective Exploration, LLCMethod and system for accessing subterranean deposits from the surface and tools therefor
US20040040315 *Feb 12, 2002Mar 4, 2004Tomohiro KoyamaHigh and low pressure gas selector valve of refrigerator
US20040103947 *Oct 1, 2003Jun 3, 2004Ranco Incorporated Of DelawareAutomotive coolant control valve
US20050109505 *Nov 26, 2003May 26, 2005Cdx Gas, LlcMethod and system for extraction of resources from a subterranean well bore
US20050178454 *Jan 14, 2004Aug 18, 2005Parrish Rob G.Aviatorial valve assembly
US20080163948 *Nov 21, 2007Jul 10, 2008Parrish Rob GAviatorial valve assembly
US20080245077 *Jun 10, 2005Oct 9, 2008Sumitomo Heavy Industries, Ltd.Multiple Rotary Valve For Pulse Tube Refrigerator
US20080295525 *Aug 12, 2008Dec 4, 2008Mingyao XuMultiple rotary valve for pulse tube refrigerator
US20130334446 *Feb 14, 2012Dec 19, 2013Ory GurVariable orifice rotary valves for controlling gas flow
DE3408815A1 *Mar 10, 1984Sep 26, 1985Mesroc GmbhMulti-way fitting for changing directions of flow and/or controlling delivery rates of gaseous or liquid media carried in pipe systems, particularly in tubular heat exchangers
WO2006135364A1 *Jun 10, 2005Dec 21, 2006Sumitomo Heavy Industries, Ltd.Multiple rotary valve for pulse tube refrigerator
Classifications
U.S. Classification137/238, 416/157.00R, 137/246.12, 137/625.47
International ClassificationF02C7/22
Cooperative ClassificationF02C7/22
European ClassificationF02C7/22