With Mechanical Movement Between Actuator And Valve Patents (Class 251/58)
  • Patent number: 6708946
    Abstract: A ball valve (10) is described which has a ball valve retaining mechanism which, when subject to very slight movement, allows a ball element (20) to be unloaded off a valve seat (48) during rotation, but remain in contact with the valve seat (48) so as to prevent debris ingress between the ball and the valve seat, and to instantaneously reload onto the valve seat upon the event of closure. This instantaneous and automatic redirection of the reaction load path at the occurrence of closure provides an effective seal against high pressure aggressive fluids to prevent fluid escaping beyond the valve components whilst, at the same time, allowing effective rotational movement of the valve to occur without providing rotational reliability. This solution allows conflicting load paths through the valve to be resolved, namely through the trunnion during rotation and through the valve seat during sealing.
    Type: Grant
    Filed: June 7, 2001
    Date of Patent: March 23, 2004
    Assignee: Expro North Sea Limited
    Inventors: Jeffrey Charles Edwards, Gavin David Cowie
  • Patent number: 6698712
    Abstract: The ball valve assembly 10 includes a valve body 12, a ball 14, a seat ring 30, a support ring 40, and an actuator sleeve 50 surrounding the ball and axially moveable within the valve body for rotating the ball between the open position and the closed position. A plurality of seals seal with the seat ring, the actuator sleeve, the support ring, and the valve body. The actuator sleeve 50 maintains fluid pressure within the valve body. The ball, support ring and seat ring are each formed from a selective material to enhance life of the ball valve assembly. A pair of pins 80, 82 each extend in a slot within the ball and holes in the sleeve, and preferably the pair of pins and the ball rotate with respect to the sleeve as the sleeve moves axially within the valve body.
    Type: Grant
    Filed: May 2, 2002
    Date of Patent: March 2, 2004
    Assignee: Dril-Quip, Inc.
    Inventors: Lionel J. Milberger, Larry E. Reimert, Jason C. McCanna, Xhemal Kaculi
  • Publication number: 20040021105
    Abstract: The invention relates to a rotating regulating device (1), especially for a valve comprising a pivotable or rotatable valve body. Said device comprises at least one actuating device (2) for rotating a regulating element (3) which can be connected to the valve body in a moveable manner. The aim of the invention is to improve one such rotating regulating device in such a way that it is precise and reproducible, and can be especially automatically actuated. In order to achieve this, the regulating element (3) is a rotating collar (4) which is rotationally positioned in relation to a bearing collar (5), and the actuating device (2) comprises at least one mechanism (6) which converts a linear movement into a rotational movement.
    Type: Application
    Filed: September 3, 2003
    Publication date: February 5, 2004
    Inventors: Klaus Biester, Norbert Lenz
  • Patent number: 6672565
    Abstract: An actuating means for a valve that is both opened and closed with a snap-action. The bidirectional, bi-stable snap acting valve has adjustable resistive forces governing the snap action of the valve. The bi-stable snap action mechanism can be incorporated into the operation of the valving element or the valving actuators.
    Type: Grant
    Filed: April 1, 2001
    Date of Patent: January 6, 2004
    Inventor: Larry R. Russell
  • Patent number: 6651687
    Abstract: A pressure relief system for detecting and correcting an overpressure situation in a pressurized fluid. The system includes a pressure responsive member such as a buckling pin configured to mechanically collapse when a predetermined force is applied to the member. An actuator assembly axially compresses the member in response to the pressure of the fluid and rotates a first shaft upon mechanical collapse of the member. A bypass valve assembly establishes a bypass path for the fluid upon rotation of a second shaft. A clutch mechanism decouples the first and second shafts prior to and during initial stages of mechanical collapse of the member and subsequently couples the first and second shafts during remaining stages of mechanical collapse of the member. In this way, forces associated with the bypass valve assembly are isolated from the actuator assembly during steady state operation and during the initial stages of mechanical collapse.
    Type: Grant
    Filed: February 8, 2002
    Date of Patent: November 25, 2003
    Assignee: Taylor Innovations, L.L.C.
    Inventor: Julian S. Taylor
  • Patent number: 6651950
    Abstract: A valve for controlling fluids has a piezoelectric unit (3) for actuating a valve member (2) that is displaceable in a bore (8) of a valve body (9), having at least one control piston (7) and at least one actuating piston (10) for actuating a valve closing member (9). Between the control piston (7) and the actuating piston (10), a hydraulic chamber (11) functioning as a hydraulic coupler is embodied; the actuating piston (10), defining the hydraulic chamber (11), is supported displaceably in a blind bore (12) of the control piston (7), which bore is open in the valve seat direction. A cross-sectional area (A0), bordering the hydraulic chamber (11), of the control piston (7) on the one hand and a smaller cross-sectional area (A1) of the actuating piston (10) and a cross-sectional area (A2) of at least one reducing element (14) determine a boost for the stroke length of the actuating piston (10), during which the at least one reducing element (14) is braced on a stop (15) in the bore (8) (Drawing figure).
    Type: Grant
    Filed: March 11, 2002
    Date of Patent: November 25, 2003
    Assignee: Robert Bosch GmbH
    Inventors: Wolfgang Stoecklein, Dietmar Schmieder
  • Publication number: 20030183793
    Abstract: The present invention relates to a valve for controlling fluids, which has a piezoelectric actuator (2), a mechanical booster (3) for boosting the stroke of the piezoelectric actuator (2), a restoring element (4), and an actuating piston (6). The mechanical booster (3) is disposed in the actuating direction of the piezoelectric actuator between the piezoelectric actuator (2) and the restoring element (4). Thus the mechanical booster (3) boosts the stroke of the piezoelectric actuator (2) in the actuating direction, and in the opposite direction boosts the restoring force of the restoring element (4).
    Type: Application
    Filed: December 24, 2002
    Publication date: October 2, 2003
    Inventor: Friedrich Boecking
  • Publication number: 20030173533
    Abstract: A method and apparatus for translating linear movement into rotational movement in an actuator configuration is provided. For example, a rotary actuator assembly includes a housing having a central bore. A piston is disposed within the housing and is linearly movable along an axis of the central bore. A rolling diaphragm is disposed within the housing and coupled with the piston. A bifurcated linkage having an end flange couples with the piston and the rolling diaphragm. An articulatable coupling further connects the bifurcated linkage with a rotating linkage. A spring button, which can be cone shaped, is disposed within the housing. A compression spring is retained between the end flange of the bifurcated linkage and the spring button, for example, by a threaded rod and nut. The assembly is arranged such that when force is applied to the rolling diaphragm the bifurcated linkage is linearly transported, which results in the pivoting of the rotating linkage about a pivot point.
    Type: Application
    Filed: March 14, 2002
    Publication date: September 18, 2003
    Applicant: Fisher Controls International, Inc.
    Inventor: Hans D. Baumann
  • Publication number: 20030160202
    Abstract: The present invention relates to a valve for controlling fluids, which has an actuator (2) and a mechanical booster (3) for boosting a stroke of the actuator (2). A restoring spring (4) and a valve element (6) are also provided. The booster (3) is embodied as a kidney-shaped tilt lever (13, 14, 23), which has point-type bearing points.
    Type: Application
    Filed: March 7, 2003
    Publication date: August 28, 2003
    Inventor: Friedrich Boecking
  • Patent number: 6585227
    Abstract: An actuator for use with a subsea choke or similar apparatus is disclosed. The actuator uses a planetary roller screw mechanism to allow greater control of the torque output while allowing a fast closing of the choke when well conditions require so. A handle is positioned on one end of the actuator housing for manipulation of the actuator housing by a remotely operated vehicle, when required. A pressure responsive axially reciprocable piston is positioned around the driven shaft and controls movement thereof. Other embodiments show the actuator controlling the position of the cage in a cage type choke. A final embodiment shows the actuator configured for use on a subsea tree.
    Type: Grant
    Filed: July 26, 2001
    Date of Patent: July 1, 2003
    Assignee: Cooper Cameron Corporation
    Inventors: Johnny E. Newport, Todd J. Mosley
  • Patent number: 6581901
    Abstract: An automatic shut-off of a vacuum line for a tool having a first hose portion and a second hose portion, the portions of hoses being in fluid communication with each other. A first member is disposed in the first hose portion and the first member is moveable between a first position and a second position. A valve is disposed in the second hose portion, wherein the valve is movable between an open position and a closed position. A second member operatively interconnects the first member and the valve. The first member operatively moves said second member to open and close the valve. When the tool is being operated the first member will move, thus opening the valve, to allow a vacuum through the tool. Also, the automatic shut-off significantly reduces noise produced by the tool during operation.
    Type: Grant
    Filed: August 15, 2001
    Date of Patent: June 24, 2003
    Assignee: The Boeing Company
    Inventor: Gord N. Comley
  • Patent number: 6564819
    Abstract: A fluid flow control damper assembly having a damper vane and a piston actuator is relatively easy to install when the outer surface of a duct is inaccessible. The piston actuator includes a powder metal piston, lacking an elastomeric (for example, rubber) seal, that is closely received within a glass cylinder. The glass cylinder has a fitting that closes one end of the cylinder and is connectable to a pneumatic control system. A drive rod is connected between the piston and the damper vane to move the damper vane between an open position and a closed position.
    Type: Grant
    Filed: April 4, 2001
    Date of Patent: May 20, 2003
    Inventor: Alex Zelczer
  • Patent number: 6547214
    Abstract: A serpentine disk lever that can be utilized for surround-type levering in a pneumatically controlled valve actuator for high pressure applications. The design of the serpentine disk lever allows it to have the flexibility required for surround-type levering, whereby the disk lever may transition from a flat to a frusto-conical shape, and the strength necessary for high pressure levering applications. High flexibility results from the disk lever's serpentine pattern, which is created by cutting alternating internal and external slits into the disk from the internal and external edges, respectively. High Strength is created by use of a hard material and by limiting stress concentration by use of a generally symmetric disk shape as well as rounded edges within the internal and external slits of the serpentine pattern.
    Type: Grant
    Filed: May 8, 2001
    Date of Patent: April 15, 2003
    Inventor: Roger J. Gregoire
  • Patent number: 6531712
    Abstract: A valve for controlling fluids is proposed, which has a piezoelectric actuator (5) and a hydraulic pressure intensifier which transmits the stroke of the piezoelectric actuator (5). The hydraulic pressure intensifier has a pressure chamber (7) and a piston element (10) with a transmission surface area (12). The hydraulic pressure intensifier can actuate a valve member (18) that is connected to the piston element (10). A mechanical pressure intensifier is interposed between the hydraulic pressure intensifier and the valve member (18).
    Type: Grant
    Filed: April 16, 2001
    Date of Patent: March 11, 2003
    Assignee: Robert Bosch GmbH
    Inventor: Friedrich Boecking
  • Publication number: 20030034467
    Abstract: An automatic shut-off of a vacuum line for a tool having a first hose portion and a second hose portion, the portions of hoses being in fluid communication with each other. A first member is disposed in the first hose portion and the first member is moveable between a first position and a second position. A valve is disposed in the second hose portion, wherein the valve is movable between an open position and a closed position. A second member operatively interconnects the first member and the valve. The first member operatively moves said second member to open and close the valve. When the tool is being operated the first member will move, thus opening the valve, to allow a vacuum through the tool. Also, the automatic shut-off significantly reduces noise produced by the tool during operation.
    Type: Application
    Filed: August 15, 2001
    Publication date: February 20, 2003
    Inventor: Gord N. Comley
  • Publication number: 20030020034
    Abstract: An actuator for use with a subsea choke or similar apparatus is disclosed. The actuator uses a planetary roller screw mechanism to allow greater control of the torque output while allowing a fast closing of the choke when well conditions require so. A handle is positioned on one end of the actuator housing for manipulation of the actuator housing by a remotely operated vehicle, when required. A pressure responsive axially reciprocable piston is positioned around the driven shaft and controls movement thereof. Other embodiments show the actuator controlling the position of the cage in a cage type choke. A final embodiment shows the actuator configured for use on a subsea tree.
    Type: Application
    Filed: July 26, 2001
    Publication date: January 30, 2003
    Applicant: Cooper Cameron Corporation
    Inventors: Johnny E. Newport, Todd J. Mosley
  • Patent number: 6494434
    Abstract: A butterfly valve comprises a valve housing with a valve opening and a valve seat, this valve housing enclosing a vacuum area of the valve; a valve plate which is mounted at a valve rod guided through the valve housing and which is pressed against the valve seat in a closed position of the valve, tilted relative to the valve seat in a partially open position of the valve through tilting of the valve rod about a tilting axis, and tilted and rotated relative to the valve in a completely open position of the valve by subsequent rotation of the valve rod about its longitudinal axis; wherein the valve rod has portions extending on both sides of the tilting axis, the portion located on one side of the tilting axis acting centrally at the valve plate and the portion located on the other side of the tilting axis being connected, via a link guide which is located outside the vacuum area and which has a link with a part extending at an inclination to the longitudinal axis of the valve rod and a helical surface-shaped p
    Type: Grant
    Filed: July 12, 2001
    Date of Patent: December 17, 2002
    Assignee: VAT Holding AG
    Inventor: Friedrich Geiser
  • Patent number: 6485258
    Abstract: The invention relates to an electromechanical actuating drive for a valve, in particular of a steam turbine. It has a push rod for setting an opening position of the valve and also an electric motor for driving the push rod. The push rod is connected to the electric motor via a transmission device which generates a changing torque, depending on the axial displacement of the push rod. The invention relates, furthermore, to a steam turbine.
    Type: Grant
    Filed: November 16, 2000
    Date of Patent: November 26, 2002
    Assignee: Siemens Aktiengesellschaft
    Inventor: Richard Steinborn
  • Publication number: 20020166984
    Abstract: A serpentine disk lever that can be utilized for surround-type levering in a pneumatically controlled valve actuator for high pressure applications. The design of the serpentine disk lever allows it to have the flexibility required for surround-type levering, whereby the disk lever may transition from a flat to a frusto-conical shape, and the strength necessary for high pressure levering applications. High flexibility results from the disk lever's serpentine pattern, which is created by cutting alternating internal and external slits into the disk from the internal and external edges, respectively. High Strength is created by use of a hard material and by limiting stress concentration by use of a generally symmetric disk shape as well as rounded edges within the internal and external slits of the serpentine pattern.
    Type: Application
    Filed: May 8, 2001
    Publication date: November 14, 2002
    Inventor: Roger J. Gregoire
  • Patent number: 6467498
    Abstract: For use with a city water system having a plurality of street water mains interconnected by branch water mains and having hydrants connected to the branch water mains, a city water flushing and sludge prevention method consisting the steps of: inserting a sludge-prevention control valve into a branch water main between two street water mains and closer to one of the two street water mains; the sludge-prevention control valve in the closed position preventing water from flowing through the branch water main from the closer street water main during a flushing operations, whereby all water flows through the branch water main from the more distant street water main and thereby flushes the portion of the branch water main between the sludge-prevention control valve and the more distant street water main; and an optional control mechanism adapted to close and open the sludge-prevention control valve. The control mechanism can utilize any power source such as electric, pneumatic, hydraulic, etc.
    Type: Grant
    Filed: August 27, 2001
    Date of Patent: October 22, 2002
    Inventor: Karim Esmailzadeh
  • Patent number: 6416032
    Abstract: The present invention discloses an expansion valve of an air conditioning system for an automobile which does not employ a conventional method that opens and shuts in response to a motion of a pin and ball and can control a flow of a refrigerant and control linearly a flow rate of a refrigerant flow into an evaporator by using holes of a fixed hole plate fixed to a valve body and holes of a rotatable cam which is rotated by a motion of a pin moved upward and downward in response to a pressure difference between an outlet of an evaporator of an expansion valve and an interior of a pressure proof barrel. In the expansion valve of the present invention, it is possible to prevent a huntting phenomenon a reverse flow of the refrigerant into the evaporator and a noise caused by a ball, which have been generated in a conventional expansion valve, from creating.
    Type: Grant
    Filed: December 28, 2000
    Date of Patent: July 9, 2002
    Assignee: Hyundai Motor Co.
    Inventor: Man Ju Oh
  • Patent number: 6391629
    Abstract: The invention relates to a static unit (1) for the production of anaerobic, micro-aerophilic or other atmospheres (e.g., CO2) in a mobile interchangeable container, which is connected, at a lid of the unit to the system for the production of the desired atmosphere in the interior of the interchangeable container. The invention also relates to an interchangeable container particularly suitable for such a device. The static unit (1) can receive mobile interchangeable containers in an aperture provided for this purpose, in which the desired atmosphere in the interior is produced fully automatically. A vacuum-operated docking cylinder automatically couples the interchangeable container, which has an internal gas supply channel for the system (4) for the production of the desired atmosphere and is pressed gas-tight against an area of the interchangeable container lid having gas inlets and outlets.
    Type: Grant
    Filed: March 15, 2000
    Date of Patent: May 21, 2002
    Inventor: Alois Jenny
  • Patent number: 6371439
    Abstract: A device for adjusting the central position of the pistons and the angular position of the pinion in a valve driving actuator comprises a tubular body in which are tightly movably arranged a first and second pistons having opposite racks, meshing with a central pinion which can turn through discrete angles. The main feature of the invention is that the inventive device further comprises limit means for limiting the stroke of the pistons toward the pinion, which means can be accessed from the outside of the tubular body.
    Type: Grant
    Filed: December 21, 1998
    Date of Patent: April 16, 2002
    Inventor: Giovanni Trevisan
  • Patent number: 6347782
    Abstract: An axial actuator for actuating a valve by rotating the shaft of the valve includes an outer enclosure forming an interior space having an inner enclosure therein. A piston is linearly moveable within the interior space of the outer housing to divide such interior space into two chambers, one of which includes the inner enclosure. A rotation device is positioned at least partially within the inner enclosure and is interconnected with the piston for rotating the valve shaft in response to linear movement of the piston. The rotation device preferably includes a rotation bevel gear having a hub adapted to receive the valve shaft to be rotated and compound pinion gears each with a bevel pinion gear which mates with the rotation bevel gear and a spur pinion gear which mates with racks which extend from the piston. Movement of the piston causes movement of the racks which rotate the compound pinion gears. This, in turn, rotates the rotation pinion gear and the valve shaft.
    Type: Grant
    Filed: January 31, 2000
    Date of Patent: February 19, 2002
    Inventor: Ajit Singh Gill
  • Patent number: 6338330
    Abstract: An apparatus for moving a valve flap, especially in the air intake duct of an internal combustion engine, including a vacuum box (20) which executes a longitudinal movement in dependence on the application of a negative pressure or vacuum, and the longitudinal movement of the vacuum box is transmitted via a coupling rod (16) to a traverse rod (15), which in turn is connected to an actuating lever (13) for the valve flap (11). The coupling rod (16) and traverse rod (15) system allows the vacuum box to be arranged in any position relative to the valve flap (11). The apparatus can be simplified further by combining the diaphragm disk (27) with the coupling rod (16) to form a single, integral part. In this case, a force is exerted eccentrically on the vacuum box. The eccentrically exerted force can be compensated by the diaphragm having a shape other than a round contour.
    Type: Grant
    Filed: March 28, 2000
    Date of Patent: January 15, 2002
    Assignee: Filterwerk Mann & Hummel GmbH
    Inventors: Thomas Jessberger, Arthur Klotz, Georg Mehne
  • Patent number: 6302128
    Abstract: A rotary valve is opened and closed with a combination incremental rachet mechanism and a continuous motor mechanism. Two separate control circuits are used for opening and closing the valve. When the opening or closing circuit is energized alone, the valve is incrementally opened or closed by the ratchet respectively. When the opening circuit is energized and the closing circuit is subsequently energized, the valve is continuously opened by the motor. Likewise, when the closing circuit is energized and the opening circuit is subsequently energized, the valve is continuously closed by the motor.
    Type: Grant
    Filed: February 20, 1998
    Date of Patent: October 16, 2001
    Assignee: Hydril Company
    Inventor: John D. Muchow
  • Patent number: 6276659
    Abstract: A valve has a pushbutton assembly and a piston assembly. The valve has a chamber defined to receive therein the piston assembly and the pushbutton assembly. The piston assembly is controlled by the pushbutton assembly to activate the communication between the chamber in the body of the valve and the inlet of the body. The pushbutton assembly has a pushbutton movably received in the body to control an engagement of a piston of the piston assembly to the chamber so as that the the water flow out of the outlet is controlled by the movement of the pushbutton.
    Type: Grant
    Filed: June 26, 2000
    Date of Patent: August 21, 2001
    Inventor: Tzu-Meng Wang
  • Patent number: 6237693
    Abstract: A subsurface well safety valve having a flow tube telescopically movable in a housing for controlling the movement of a valve closure member. A piston and cylinder assembly actuates the flow tube and is in communication with hydraulic control fluid from the well surface on one side and a gas biasing chamber on the second side and includes a spring acting on the flow tube to close the valve. An equalizing system equalizes fluid pressure on opposite sides of the piston and cylinder assembly in the event of a failure in the seal between the piston and cylinder thereby allowing the spring to close the valve. The equalizing system uses fewer components than previous designs and utilizes a new reference chamber design that allows the reference chamber and the piston to be positioned within the same axial length reducing the overall length of the safety valve over previous designs.
    Type: Grant
    Filed: August 13, 1999
    Date of Patent: May 29, 2001
    Assignee: Camco International Inc.
    Inventor: Thomas M. Deaton
  • Patent number: 6231027
    Abstract: A high torque rotating actuator is disclosed. The high torque rotating actuator has a variable helix angle that allows the actuator to generate greater torque near the end of its travel when it is needed to close a valve or operate a choke. The high torque rotating actuator is designed for use with valves and chokes. In a second embodiment, a high torque rotating actuator is configured to give a shorter overall assembly. As in the preferred embodiment, a variable helix angle is used to generate greater torque near the end of its travel when it is needed to close a valve or operate a choke.
    Type: Grant
    Filed: September 18, 1998
    Date of Patent: May 15, 2001
    Assignee: Cooper Cameron Corporation
    Inventors: Gerald S. Baker, David Garnham, Brian Hart, Danny K. Wolff
  • Patent number: 6220566
    Abstract: An incrementally positionable ball valve for use in the fluid circuit of a refrigeration or air conditioning system which can be remotely controlled by a low amperage control signal is disclosed. The ball valve harnesses the pressurized refrigerant from the fluid circuit in which it is installed as the primary power medium to actuate the valve. A sensor provides feedback to a controller relating to the incremental position of the valve. The controller then controls the operation of the valve in accordance with predetermined criteria. In another embodiment, the ball valve incorporates locator detents so that its incremental position can be determined by an operator manually controlling the valve. In still another aspect of the invention, a restrictor is provided for varying the flow capacity of the valve.
    Type: Grant
    Filed: September 22, 1998
    Date of Patent: April 24, 2001
    Assignee: Mueller Industries, Inc.
    Inventor: Kent Alan Miller
  • Patent number: 6199822
    Abstract: A fluid-operated actuator (10) particularly for use in diesel-engined vehicles has a housing (12) defining a cylinder (14) having a cylinder wall (16) extending about a longitudinal axis (18). A piston (20) is arranged for reciprocal motion in the cylinder between a first end position and a second end position and an actuator rod (24) cooperates with the piston. The housing (12) includes first sealing means (28) for establishing a sealing contact with a first region (30) of the piston in the first end position and second sealing means (34) for establishing a sealing contact with a second region (36) of the piston in the second end position to thereby prevent leakage of operating fluid past the piston when the piston is in either of its end positions. To obviate e.g. the need for piston rings, the piston (20) and the housing (12) are arranged such that when the piston is between the first end position and the second end position, operating fluid is permitted to leak between the piston and cylinder wall (16).
    Type: Grant
    Filed: November 19, 1997
    Date of Patent: March 13, 2001
    Assignee: Volvo Lastvagnar AB
    Inventor: Nils-Olof H{haeck over (a)}kansson
  • Patent number: 6179172
    Abstract: A basket gate (18) mechanism, typically for use in the cargo holds (12), of bulk carriers (10), includes two opposed gate segments (50, 51) which shut along a central line. Each gate segment (50, 51) is supported at its ends by pairs of different length arms (57, 58, 59, 60), so that when the gate (18) is opened, the segments (50, 51) slope downwardly. The pairs of arms (57, 58, 59, 60) are interconnected by a small and compact direction reversing lever mechanism (61, 62, 63, 64) that ensures coordination of the movement of the segments (50, 51). The arms (57, 58, 59, 60) and the supporting framework (52) are protected by a hog back (53). The gate (18) is opened and closed by an actuating means (65), typically a double acting hydraulic cylinder, located between the gate segments (50, 51) at their midpoints, and directly acting on said said gate segments.
    Type: Grant
    Filed: October 28, 1999
    Date of Patent: January 30, 2001
    Assignee: EMS-Tech Inc.
    Inventors: John B. Elder, Kirsten L. Sorensen
  • Patent number: 6170797
    Abstract: A rotary actuator in which, in order to realize cost reductions, the configuration of an extruded material used to form a cylinder body is modified to reduce the weight of the material, and the number of components or the number of manhours needed for machining is reduced by changing the method of installing a solenoid-operated switching valve, speed controllers and an open valve for short circuiting. The cylinder body (11) is produced from an extruded material (1) formed by extrusion. A section of the extruded material (1) that is perpendicular to the direction of extrusion of the extruded material (1) is circular at the inner periphery thereof and has upwardly, downwardly, leftwardly and rightwardly projecting thick-walled portions (12 to 15) at the outer periphery thereof. The outer peripheral portions of the section, exclusive of the projecting thick-walled portions (12 to 15), are generally formed from circular arcs.
    Type: Grant
    Filed: September 30, 1997
    Date of Patent: January 9, 2001
    Assignee: SMC Corporation
    Inventors: Yasuhito Kimura, Keisuke Inoue
  • Patent number: 6170514
    Abstract: For use with a city water system having a plurality of street water mains interconnected by branch water mains and having hydrants connected to the branch water mains, a city water flushing and sludge prevention apparatus consisting of: a sludge-prevention control valve insertable into a branch water main between two street water mains and closer to one of the two street water mains; the sludge-prevention control valve in the closed position preventing water from flowing through the branch water main from the closer street water main during a flushing operation, whereby all water flows through the branch water main from the more distant street water main and thereby flushes the portion of the branch water main between the sludge-prevention control valve and the more distant street water main; and a control mechanism adapted to close and open the sludge-prevention control valve.
    Type: Grant
    Filed: January 19, 1999
    Date of Patent: January 9, 2001
    Inventor: Karim Esmailzadeh
  • Patent number: 6155531
    Abstract: A proportional control valve has inlet and outlet solenoids controlling the pressurization and evacuation of a chamber between two pistons in a control valve of the rack and pinion opposed-piston type. The control valve can be maintained in fully open, fully closed, or intermediate positions by selectively energizing and de-energizing the solenoids. The solenoids can be of the normally open or normally closed solenoid poppet types depending on whether the control valve is to open, close or maintain its current state in the event of a power failure.
    Type: Grant
    Filed: January 22, 1999
    Date of Patent: December 5, 2000
    Assignee: Automatic Switch Company
    Inventors: Peter A. Holborow, Daniel M. Avis
  • Patent number: 6152229
    Abstract: A dual in-line ball valve assembly for a subsea tree intervention tool has a pair of axially-movable pistons and a rotatable linkage member pinned between each of the pistons and the independently operable ball valves. The linkage members have eccentric hubs which rotate the ball valves between open and closed positions when the pistons are axially actuated. A recess is formed in each ball valve adjacent to the central flow passage of the assembly for accommodating a lower side of tubing or wireline. The recesses prevent shearing of the tubing or wireline in two places when one of the valves moves to the closed position.
    Type: Grant
    Filed: August 24, 1998
    Date of Patent: November 28, 2000
    Assignee: ABB Vetco Gray Inc.
    Inventor: Charles E. Jennings
  • Patent number: 6135414
    Abstract: Apparatus for coordinating the positions of valves in a pair of air flow passages along a jet engine nacelle to control two rotary valves from a single linear actuator. Each of the valves is of a ball type which is rotatable within a housing to achieve variable flow control in accordance with the particular shape of the opening through the rotatable valve member which varies with valve member rotation. The valve member bore shape may differ for the two valves, as well as the angle of the linkage between the linear actuator and each valve, to achieve different flow control relationships for the two valves from the single actuator armature. Each valve incorporates a pressure balancing member at the inlet seal of the valve which results in a reduction of the force of the seal element against the rotatable valve member when the valve is in the closed position, thereby reducing the torque required to rotate the valve out of the closed position.
    Type: Grant
    Filed: December 24, 1998
    Date of Patent: October 24, 2000
    Assignee: Whittaker Corporation
    Inventor: Rafic Mohtar
  • Patent number: 6113063
    Abstract: The object of the present invention is to provide an actuator possible to transmit an output from a power rod of the actuator as rotary motion, and to provide an exhaust brake unit using the actuator, easy to assemble, a small space necessary for installation, able to place the actuator in such a manner that an axis of a power rod of the actuator and an axis of a valve shaft are aligned in a line, and heat transfer from an exhaust channel to the actuator is minimized.
    Type: Grant
    Filed: December 16, 1999
    Date of Patent: September 5, 2000
    Assignee: Nippon Thermostat Co., Ltd.
    Inventors: Masanori Takahashi, Masahiro Tokunaga
  • Patent number: 6105927
    Abstract: A low friction fluid motor has a diaphragm mounted in a shell to divide the shell into first and second chambers, a port means for connecting the second chamber to a pressure or vacuum source, and an actuator assembly. The actuator assembly is connected to the diaphragm and includes an actuator member extending out of the shell through an aperture. The actuator is free of any seal member which is interposed between the actuator member and the shell and which functions to form a seal between the actuator member and the aperture in the shell. The aperture is oversized relative to the actuator member to allow free passage of the actuator member from the actuator assembly through the first chamber and out of the fluid motor.
    Type: Grant
    Filed: October 7, 1997
    Date of Patent: August 22, 2000
    Inventors: Alex Zelczer, Ruth Zelczer
  • Patent number: 6098714
    Abstract: An improved fluid actuator is provided. The fluid actuator (25) comprises a variable volume fluid chamber (124). A first tube (162) is fixed within the variable volume fluid chamber (124). The first tube (162) has a first sealing surface (142) and a second sealing surface (144). A piston (100) is slidably disposed within the variable volume fluid chamber (124) and slidably movable over the first tube (162) between a first position and a second position. The piston (100) comprises a first sealing surface (140) and a second sealing surface (146). The piston first sealing surface (140) and the first tube first sealing surface (142) cooperate to form a seal between the piston (100) and the first tube (162) when the piston (100) is in the first position. The piston second sealing surface (146) and the first tube second sealing surface (144) cooperate to form a seal between the piston (100) and the first tube (162) when the piston (100) is in the second position.
    Type: Grant
    Filed: July 17, 1998
    Date of Patent: August 8, 2000
    Assignee: Halliburton Energy Services, Inc.
    Inventor: Thomas M. Deaton
  • Patent number: 6089530
    Abstract: A swing gate valve for closing a lateral discharge opening in an elongated conduit includes a swing gate shaped to fit around the exterior of the conduit in an open position adjacent the lateral opening. A pair of pivotable swing arms are connected to the swing gate on opposite sides of the conduit, and are operated by an air ram to swing the gate to move it to a closed position over the discharge opening to an open position.
    Type: Grant
    Filed: June 23, 1998
    Date of Patent: July 18, 2000
    Inventor: Henry A. Heer
  • Patent number: 6085770
    Abstract: A method and apparatus for remotely opening a manual valve of a gas cylinder from a remote location. The gas cylinder is first connected to a purge system which is purged of oxygen and pressurized with an inert gas to a pressure near that of the gas cylinder. The manual valve is then engaged with a pneumatic stepper mechanism. Pneumatic fluid is supplied to the pneumatic stepper mechanism to rotate the manual valve a predetermined stepped increment. The step of supplying pneumatic fluid to the pneumatic stepper mechanism is repeated, after pausing to let the system settle, to rotate the manual valve another stepped increment. The steps of rotating and pausing are repeated until the manual valve is opened. The purge system is then vented to atmosphere through a diffuser. Both the pneumatic stepper mechanism and the purge system are fully operable from the remote location. The pneumatic stepper mechanism includes a ratchet assembly and an attachment assembly connecting the ratchet assembly to the manual valve.
    Type: Grant
    Filed: September 24, 1997
    Date of Patent: July 11, 2000
    Assignee: AGA AB
    Inventors: James R. MacNeal, Richard D. Philpott, Matthew J. Philpott
  • Patent number: 6086038
    Abstract: Apparatus primarily for use in seating and unseating a valve by turning the valve stem between a fully opened and fully closed position. In one form of the invention, a lever arm attached to the valve stem is connected at one corner of a triangular shaped crank arm by a link. A second corner of the crank arm is rotatably mounted on a fixed shaft and the third corner is connected to an actuator. The shaft, the link and a pivot point on the distal end of the lever arm and are all brought into alignment along a common axis when the valve is in a fully closed position. Moving the actuator in the opposite direction breaks the alignment between the link and the crank arm and pulls the lever arm toward a valve opening position.
    Type: Grant
    Filed: November 16, 1998
    Date of Patent: July 11, 2000
    Assignee: Young & Franklin, Inc.
    Inventor: Weijian Ma
  • Patent number: 6076799
    Abstract: A rotary valve actuator and linkage include an actuator having a tubular housing with end caps and a piston that is moved by fluid pressure against a compression spring. A rolling diaphragm is used to bias the piston. A pair of ports are provided on opposite sides of the housing, and a linkage having two arms is interconnected with the piston through the ports. The linkage is coupled to a rotary valve shaft and linear movement of the piston causes rotational movement of the shaft. The linkage includes two separate arms and a centerpiece. In one embodiment, the arms and the centerpiece interengage each other at angled surfaces that force the centerpiece and the arms into radial engagement with the shaft when axial compression is provided to the arms and centerpiece to force them toward each other. In another embodiment, each of the linkage arms is provided with a collet having radially movable portions.
    Type: Grant
    Filed: February 19, 1998
    Date of Patent: June 20, 2000
    Assignee: Fisher Controls International, Inc.
    Inventor: Hans D. Baumann
  • Patent number: 6062534
    Abstract: A rotary valve actuator with movable actuator linkage maintained in a constant "pull-pull" tension, includes a sliding canister, rotatable lever, and a return spring substantially aligned in-line with each other. The linear motion of the canister in response to an expanding and contracting pressurized bladder is converted through chain linkage into rotary lever motion. The return spring is connected through respective chain linkage to the lever so the pulling tension of the spring/lever linkage rotates the lever and maintains tension on both chain linkages. Adjustable travel stops are provided. In an alternate embodiment the return spring chain linkage is configured at right angles to the linear movement of the canister. A double acting rotary valve actuator with pressurized bladders on opposite sides of a rotatable lever. One bladder is oval shaped.
    Type: Grant
    Filed: April 25, 1997
    Date of Patent: May 16, 2000
    Assignee: Fisher Controls International
    Inventor: Philip Wayne Eggleston
  • Patent number: 6059259
    Abstract: A force multiplication mechanism utilizing one or more upwardly open slotted conical disc springs to impart a highly amplified biasing force substantially at the center of the spring upon a force receiving member when the springs are oriented in an unrelieved, but loaded configuration. Two fulcrums are positioned, one each, proximate to upper and lower surfaces of the slotted disc springs. One fulcrum, a high amplification fulcrum, engages the upper surface of the disc spring in the unrelieved configuration causing the downwardly biasing force to be a multiple of the spring's rated force, exemplarily on the order of five times that rated force. A second fulcrum, a low amplification fulcrum, engages the lower surface of the disc spring and acts as a pivot point about which the spring transitions into the relieved configuration causing the downwardly biasing force to be relieved.
    Type: Grant
    Filed: December 31, 1997
    Date of Patent: May 9, 2000
    Assignee: Advanced Pressure Technology
    Inventors: Roger J. Gregoire, John C. Kaufman, Peter P. Szyperski
  • Patent number: 6053251
    Abstract: A reduced travel operating mechanism for downhole tools is provided. The reduced travel operating mechanism (57) includes a load ratio system (59) which may include compression ring (102) disposed within circumferential guide pocket (123) and a linkage system (61) disposed within mechanism pocket (125). The linkage system (61) may include first link (112), master link (114), and second link (116) coupled between compression ring (102) and connecting member (118). A loading system (63), which may include a hydraulic piston (100), acts on compression ring (102) to move compression ring (102) a first distance. Connecting member (118) moves a second distance in response to the movement of compression ring (102) a first distance. The linkage system (61) may operate such that the second distance is greater than the first distance or operate such that the first distance is greater than the second distance.
    Type: Grant
    Filed: April 9, 1998
    Date of Patent: April 25, 2000
    Assignee: Halliburton Energy Services, Inc.
    Inventor: Thomas M. Deaton
  • Patent number: 6032920
    Abstract: The objection of the present invention is to provide an actuator possible to transmit an output from a power rod of the actuator as rotary motion, and to provide an exhaust brake unit using the actuator, easy to assemble, a small space necessary for installation, able to place the actuator in such a manner that an axis of a power rod of the actuator and an axis of a valve shaft are aligned in a line, and heat transfer from an exhaust channel to the actuator is minimized.
    Type: Grant
    Filed: September 29, 1997
    Date of Patent: March 7, 2000
    Assignee: Nippon Thermostat Co., Ltd.
    Inventors: Masanori Takahashi, Masahiro Tokunaga
  • Patent number: 6024115
    Abstract: The instant invention consists of an inner cannula of hosing amenable to transport of a liquid coupled with an outer cannula or cannulae of hosing amenable to transport of a gas. As respects one embodiment, affixed to outer walling of the inner cannula and to inner walling of the outer cannula are rigid struts, typically three or four, at 120.degree. or rights angles with respect to one another at various points along the respective lengths of the cannulae that serve to maintain separation of the cannulae from one another at times when the inner cannula is filled with a liquid and the outer cannula is filled with a gas. A second embodiment is strut free. Each cannula has an ingress end whereat a liquid is introduced into the inner cannula and whereat a gas is introduced into the outer cannula.
    Type: Grant
    Filed: July 17, 1997
    Date of Patent: February 15, 2000
    Inventor: John F. Freed
  • Patent number: 6003605
    Abstract: A tubing retrievable surface controlled subsurface safety valve 106 is adapted to be positioned in a well tubing string 102 to control the flow through the tubing string. The safety valve includes an annular housing or body 200 defining a fluid passageway through which fluids and/or gasses may flow to the surface. The safety valve is equipped with a valve closure member such as flapper 252, positioned in the fluid passageway which is moveable between an open and closed position. The valve closure member is engaged and actuated by a longitudinally extending operator 242 that engages the valve closure member 252. In one embodiment, the longitudinally extending operator 242 may be a tubular member longitudinally moveable within the valve body. The longitudinally extending member 242 is operatively coupled to a spring guide 226. A biasing spring 222 is positioned in a spring chamber 120 defined by a spring housing 228 and the spring guide 226. A spring 256 biases the closure member 252 in the closed position.
    Type: Grant
    Filed: December 1, 1997
    Date of Patent: December 21, 1999
    Assignee: Halliburton Enery Services, Inc.
    Inventors: Rennie L. Dickson, Nam Van Le