Concentric Elements Patents (Class 236/102)
  • Patent number: 9829115
    Abstract: A valve may include a housing forming one inlet and at least one outlet, an operating unit mounted in the housing, and performing expansion or contraction in accordance with a temperature of a flowing working fluid to selectively connect the at least outlet with the one inlet for exhausting the flowing working fluid outside of the housing, wherein the operating unit includes a sliding member slidably inserted into the interior of the housing, a flange member forming a penetration hole and fixedly mounted inside of the sliding member, a rod movably inserted into the penetration hole of the flange member, and a deformable member fixed at the penetration hole of the flange member and expanded or contracted in accordance with a temperature of the flowing working fluid.
    Type: Grant
    Filed: October 8, 2014
    Date of Patent: November 28, 2017
    Assignees: Hyundai Motor Company, Kia Motors Corporation
    Inventors: WanJe Cho, JaeYeon Kim, YongJeong Kim
  • Patent number: 8757508
    Abstract: A fluid flow control device has an annular fixed body with at least one aperture in an annular surface thereof. When in use, fluid is arranged to flow through the at least one aperture. A thermally responsive annular valve element is mounted concentrically with respect to the fixed body. The configuration of the annular valve element is changeable with temperature so as to control the flow of fluid through the at least one aperture.
    Type: Grant
    Filed: April 8, 2010
    Date of Patent: June 24, 2014
    Assignee: Rolls-Royce PLC
    Inventors: Andras D Haasz, Alexander E H Fitzhugh, Christopher J Burden, Jonathan Wilson, Samuel M Sampson, Derek Clarke
  • Patent number: 8746582
    Abstract: The hot and cold water mixing valve having a cylindrical casing is provided with a control valve member which adjusts a ratio between hot and cold water inlets by balancing loads applied by a biasing member and an actuator, and cylindrical temperature adjuster which adjusts a position of the control valve member when rotated. In the temperature adjuster, an upper surface is formed at one end, a knob is provided in the center of the upper surface, and a ring-shaped recess is formed around the knob at the upper surface. The temperature adjuster is arranged inside the casing and the knob is inserted, coaxially with the casing, into the hole which opens at one end of the casing. A spacer which covers the recess is interposed and held between the upper surface of the temperature adjuster and one end of the casing.
    Type: Grant
    Filed: December 1, 2008
    Date of Patent: June 10, 2014
    Assignees: Toto Ltd., Nippon Thermostat Co., Ltd.
    Inventors: Kensaku Todaka, Hideyuki Matsui, Eiji Seki, Isao Negishi
  • Patent number: 8353462
    Abstract: A hot and cold water mixing valve including a temperature adjusting dial, and a cylindrical casing having formed therein a hot water inlet and a cold water inlet is provided with a control valve member in which one end thereof is subjected to a load from a biasing member and the other end is subjected to a load from an actuator. By balancing between the loads applied by the biasing member and the actuator, a mixture ratio between the hot water which flows in through the hot water inlet and the cold water which flows in through the cold water inlet is adjusted. A temperature adjuster adjusts a position of the control valve member through the biasing member and includes a tapered skirt portion, which spreads in a radial direction, at an end on the control valve member side thereof.
    Type: Grant
    Filed: December 5, 2007
    Date of Patent: January 15, 2013
    Assignees: Toto Ltd., Nippon Thermostat Co., Ltd.
    Inventors: Kensaku Todaka, Hideyuki Matsui, Eiji Seki, Isao Negishi
  • Patent number: 7086604
    Abstract: The gate arrangement 11 is provided in order to regulate coolant airflow in a path typically in a turbine blade 1 of a jet engine. The gate arrangement 11 includes a gate component 12 having an opening end 15 which at low temperature is closed by a gate member 14. Due to different coefficients of expansion between the gate component 12 and the gate member 14 when the arrangement 11 increases in temperature there is a divergence between a seal end 21 of the gate member 14 in order to open the opening end 15 of the gate component 12 and to allow coolant airflow through the arrangement 11. Thus, coolant airflow is allowed for high temperatures but as the gate component 12 and gate member 14 converge at sustained typically lower temperatures coolant airflow is stopped in order to prevent unnecessary cooling and so provide greater thermal efficiency.
    Type: Grant
    Filed: June 24, 2003
    Date of Patent: August 8, 2006
    Assignee: Rolls-Royce plc
    Inventor: Anthony B Phipps
  • Patent number: 6471135
    Abstract: An adjustment and control unit for gas burner valves provided with a bimetal rod-and-tube thermostat which is arranged on a rocker supporting the flow control element of a valve. A translational motion actuator is arranged so as to push on the rocker, on the opposite side with respect to the thermostat, and is kinematically connected to a knob by way of coupling elements which convert rotary motion into a translational motion. The coupling elements provide two distinct transmission ratios, each at specific rotation positions.
    Type: Grant
    Filed: May 29, 2001
    Date of Patent: October 29, 2002
    Inventor: Margherita Paolucci
  • Patent number: 5913891
    Abstract: A thermal expansion valve comprises a metal tube for flowing a fluid therethrough, and a metal rod fixed only at a first end in the tube and disposed wholly within the tube, the metal tube having a greater coefficient of expansion than the metal rod. A plug having an orifice therethrough is disposed in the tube proximate a free end of the rod. Lengthwise thermal expansion and contraction of the tube and the rod caused by the temperature of the fluid in the tube and around the rod causes the free end of the rod to retreat from the plug to increase flow of the fluid therethrough, and causes the free end of the rod to approach the plug to restrict flow of the fluid therethrough, respectively.
    Type: Grant
    Filed: October 13, 1998
    Date of Patent: June 22, 1999
    Inventor: Lawrence G. Clawson
  • Patent number: 5890652
    Abstract: The present invention is a thermally self-regulating nozzle for a snowmaking machine. The invention also relates to a system including the nozzle and method of snowmaking using the nozzle. The nozzle includes an outer housing made of a first material and a thermally separated inner housing, and a nozzle assembly attached to the outer housing by a member made of a second material having a thermal coefficient of expansion lower than the first material. The size of the nozzle outlet being dependent upon the expansion/contraction of the outer housing to accommodate more efficient snowmaking over a range of temperatures.
    Type: Grant
    Filed: July 8, 1997
    Date of Patent: April 6, 1999
    Inventor: Peter Taylor
  • Patent number: 5819548
    Abstract: A thermal expansion valve comprises a metal tube for flowing a fluid therethrough, and a metal rod fixed only at a first end in the tube and disposed wholly within the tube, the metal tube having a greater coefficient of expansion than the metal rod. A plug having an orifice therethrough is disposed in the tube proximate a free end of the rod. Lengthwise thermal expansion and contraction of the tube and the rod caused by the temperature of the fluid in the tube and around the rod causes the free end of the rod to retreat from the plug to increase flow of the fluid therethrough, and causes the free end of the rod to approach the plug to restrict flow of the fluid therethrough, respectively.
    Type: Grant
    Filed: June 19, 1997
    Date of Patent: October 13, 1998
    Inventor: Lawrence G. Clawson
  • Patent number: 5613634
    Abstract: A passively temperature actuated valve has a shape memory alloy (SMA) mechanism connected to a lever arm which engages the valve stem to actuate the valve against the biasing force of a valve stem biasing spring when the ambient temperature rises above the transition temperature of the SMA. The SMA mechanism can include an SMA rod, but preferably has a tube of shape memory alloy supported in couplings which allow ambient fluid to freely pass through the tube. A stack of Bellville springs concentrically mounted over the tube biases the tribe to the elongated condition when below the transition temperature. An optional latch latches the valve in the actuated position if it is required that the valve remain actuated when the ambient temperature falls below the transition temperature and the Bellville springs again elongate the SMA member.
    Type: Grant
    Filed: October 24, 1994
    Date of Patent: March 25, 1997
    Assignee: Westinghouse Electric Corporation
    Inventors: Luciano Veronesi, Ian L. W. Wilson
  • Patent number: 5402935
    Abstract: A compensation device receives an inlet fluid flow and adjusts the pressure at an outlet so as to maintain a constant Reynolds number throughout the operating temperature range of the fluid. This is accomplished by a metering valve device in the nature of a fluted pin which becomes displaced in response to fluid temperature variations. This displacement varies the exposed cross-sectional area of a fluted end of the pin as it becomes seated to a greater or lesser extent in response to temperature variations. This results in corresponding changes in pressure between the inlet and outlet of the device while maintaining a constant Reynolds number. An additional embodiment includes an unfluted pin which becomes seated in a fluted bore located in a removable knurled knob. This allows one to insert various knurled knobs with fluted bores which have geometric configurations particularly adapted for particular fluids. Such a modular approach avoids the necessity of dismantling the device.
    Type: Grant
    Filed: February 2, 1994
    Date of Patent: April 4, 1995
    Assignee: Northrop Grumman Corporation
    Inventors: Aldo Arena, Christopher Horan, Brian Robinson
  • Patent number: 5280877
    Abstract: A tap assembly includes a body with a chamber having an inlet and an outlet, and a seat therebetween. A clapper is disposed for movement relative to the seat between a first position engaged upon the seat for resisting flow of fluid toward the outlet, and a second position of for permitting flow. The tap assembly also includes a reciprocal positioning assembly with a rod mounted for axial movement between a first position for allowing the clapper to engage upon the seat and a second position for precluding the clapper from engaging upon the seat; a cylindrical housing; and an elastically deformable elongated element which forms a split ring positioning unit for the rod. The positioning unit has an inner ring and an outer ring.
    Type: Grant
    Filed: January 29, 1993
    Date of Patent: January 25, 1994
    Assignee: Watts Investment Company
    Inventor: Jean L. Huveteau
  • Patent number: 5174497
    Abstract: A cryogenic pilot valve comprising a thermal sensing element of two disparate thermal expansion materials on an actuator body joined to a control fixture having an integral valve wherein the actuator body and the control fixture are rigidly joined by loaded threads which simultaneously serve as the calibration set point device.
    Type: Grant
    Filed: January 13, 1992
    Date of Patent: December 29, 1992
    Assignee: Praxair Technology, Inc.
    Inventor: Norman H. White
  • Patent number: 4898324
    Abstract: An apparatus for correcting the weight flow of fluid passing through a fuel control is shown. A bimetallic probe is placed within a metering spool to sense temperature variation of the fuel passing therethrough. A feedback mechanism senses changes in the probe and nulls the spool. The spool cooperates with specially shaped windows in a sleeve so that a percentage change in temperature allows a corresponding percentage change in fuel flow thereby offsetting changes in fuel density (and weight flow) caused by temperature changes. The probe is comprised of a rod and a perforated shell.
    Type: Grant
    Filed: May 30, 1989
    Date of Patent: February 6, 1990
    Assignee: United Technologies Corporation
    Inventors: Robert H. Perkinson, Charles F. Stearns, Rene F. Belanger
  • Patent number: 4852601
    Abstract: A self-actuating drip valve for attachment to a standard outdoor faucet for the prevention of freezing of such exposed faucets and water pipes leading to the faucet. A tube includes a collar at one end for securing to the end of the faucet. A stem extends within the tube so as to be adjacent the faucet. One or more ports extend between the faucet and the interior of the tube. The distal end of the stem mates with an orifice through the distal end of the tube. The tube and stem have different coefficients of expansion, one being plastic and the other being metal. In practice, the tube is attached to the faucet, which is open, and is filled with water. When the outside ambient temperature drops, the tube and stem contract at different rates and the relative movement opens the orifice in the distal end of the tube so as to permit water to drip therethrough.
    Type: Grant
    Filed: January 3, 1989
    Date of Patent: August 1, 1989
    Inventor: John M. Chamberlin
  • Patent number: 4802621
    Abstract: A thermal modulating control valve for providing bleed air for aircraft anti-icing purposes includes a valve chamber with an inlet for high temperature bleed air and an outlet for temperature modulated bleed air for aircraft systems. A modular valve mechanism is mounted in a chamber for regulating the flow of hot bleed air to the outlet in response to the temperature of the supply. The valve includes a first wall section having a plurality of spaced apart flow orifices or openings in one face and fixedly secured adjacent the inlet end of the chamber, and a second confronting wall section having a plurality of spaced apart flow orifices or openings provided to directly confront the orifices in the first wall section. The wall sections are movable relative to one another in response to the temperature of the bleed air at the inlet end so as to displace the respective sets of flow orifices in and out of registry for controlling the flow of bleed air supplied to the outlet of the valve.
    Type: Grant
    Filed: September 25, 1986
    Date of Patent: February 7, 1989
    Assignee: Consolidated Controls Corporation
    Inventor: Helmut Standke
  • Patent number: 4759883
    Abstract: A temperature compensated carburetor having a fuel metering system including a variable restriction needle gate valve for varying the effective flow cross-sectional area of the main and/or idle fuel supply duct to modulate the flow rate of fuel to the carburetor venturi mixing passage. The needle gate valve is made of plastic material having a much greater coefficient of expansion than the aluminum carburetor body in which it is adjustably mounted such that differential linear expansion and contraction of the needle valve relative to the carburetor body in response to ambient temperature changes varies the flow-controlling cross-sectional area of the fuel duct inversely relative to ambient temperature changes. The needle valve is a rod-like body with a threaded cylindrical mounting portion at one end threadably secured in a threaded bore in the carburetor body.
    Type: Grant
    Filed: March 12, 1987
    Date of Patent: July 26, 1988
    Assignee: Walbro Corporation
    Inventors: John C. Woody, Mark S. Swanson
  • Patent number: 4603981
    Abstract: A device for regulating or respectively limiting the temperature provided an electric heating element in cooking apparatus. At least one temperature sensor is provided for regulating or respectively limiting the temperature, the sensor having a rod of high thermal expansion which is disposed in a tube of low thermal expansion, the tube being held between holding elements. A support member adjoins each end of the tube and surrounds the rod. The holding elements are alongside each of the support members. The support member has a coefficient of thermal expansion .alpha..sub.1 which is smaller than a coefficient of thermal expansion .alpha..sub.2 of the adjoining holding element and larger than the coefficient of thermal expansion .alpha..sub.3 of the tube.
    Type: Grant
    Filed: October 19, 1984
    Date of Patent: August 5, 1986
    Assignee: Electrovac, Fabrikation elektronischer Spezialartikel Gesellschaft m.b.H.
    Inventor: Karl Lieberth
  • Patent number: 4596360
    Abstract: To eliminate the effect of variables such as pressure and temperature on the operation of a pilot operated, pressure regulating valve, a poppet (30) is disposed between two ports (20), (34) in a valve body (14) and is biased towards a seat (26) by a pair of bellows (50), (58) which in turn are selectively compressed by an elongated rod (68). The bellows (50), (58) are disposed in opposing relation and have their interiors vented to eliminate the effect of ambient pressure while the body (14) and the rod (68) are made of materials having differing coefficients of thermal expansion to provide for temperature compensation.
    Type: Grant
    Filed: December 26, 1984
    Date of Patent: June 24, 1986
    Assignee: Sunstrand Corporation
    Inventor: Mordehy Cohen
  • Patent number: 4511083
    Abstract: Disclosed herein is a self-regulating hydrant which is characterized by a mechanism which automatically alters the flow of fluid through a valve seat in response to changes in ambient temperature. A temperature-responsive member, operatively coupled to a valve plug, is used to control the position of the plug relative to a valve seat. As the temperature of such member changes, its dimensions change. Such dimensional changes are preferably amplified and used to move the plug relative to the valve seat to control the rate of fluid flow through the valve seat.
    Type: Grant
    Filed: May 16, 1983
    Date of Patent: April 16, 1985
    Assignee: Ratnik Industries, Inc.
    Inventor: Otto Muller-Girard
  • Patent number: 4468935
    Abstract: Device comprising an inlet duct for a gaseous refrigerating fluid under pressure connected to a choke opening into a fluid expansion and liquefaction chamber connecting with a refrigerating fluid discharge passage which exchanges heat with the said inlet duct, characterized in that, for the pressure range involved, the minimum opening (15) of the choke (10) and the heat exchange relationships with the inlet duct (7, 8) are such that in the minimum opening operating phase a liquefaction phase arises in the inlet duct upstream of the choke, so producing self-regulation producing the fluid flow just necessary to maintain liquefaction in the expansion and liquefaction chamber.
    Type: Grant
    Filed: January 4, 1983
    Date of Patent: September 4, 1984
    Assignee: Societe Anonyme de Telecommunications
    Inventor: Rene D. M. Albagnac
  • Patent number: 4451002
    Abstract: The temperature actuated valve comprises a thermally more sensitive valve stem than the valve housing. The stem expands at a faster rate and causes vapor entering the valve to be gradually vented through an orifice of gradually increasing area as the temperature of the gas increases. It has application as a cryogenic phase separator valve which allows any cryogen vaporized in a cryogen delivery system to be automatically vented from the valve and to allow for an even flow of liquid to the spray nozzles and onto products of cryogenic freezing tunnels.
    Type: Grant
    Filed: July 19, 1983
    Date of Patent: May 29, 1984
    Assignee: Air Products and Chemicals, Inc.
    Inventors: David J. Klee, Peter C. Nelson
  • Patent number: 4441327
    Abstract: The temperature actuated valve comprises a thermally more sensitive valve stem than the valve housing. The stem expands at a faster rate and causes vapor entering the valve to be gradually vented through an orifice of gradually increasing area as the temperature of the gas increases. It has application as a cryogenic phase separator valve which allows any cryogen vaporized in a cryogen delivery system to be automatically vented from the valve and to allow for an even flow of liquid to the spray nozzles and onto products of cryogenic freezing tunnels.
    Type: Grant
    Filed: December 7, 1981
    Date of Patent: April 10, 1984
    Assignee: Air Products and Chemicals, Inc.
    Inventors: David J. Klee, Peter C. Nelson
  • Patent number: 4360481
    Abstract: A carburetion system for an internal combustion engine having improved fuel metering is disclosed and includes a fuel supply conduit which is formed in a portion of the body of the carburetor extending from a fuel source to the carburetor bore with that carburetor body portion having a first linear temperature coefficient of expansion. A mixture control member formed of a material having a second linear temperature coefficient of expansion engages the body in a first region and defines relative to the carburetor body in a second remote region a fuel metering orifice for controlling fuel flow through the fuel supply conduit. The mixture control member may be moved relative to the first and second regions to change the fuel to air ratio supplied to the engine. Employing a fuel metering orifice in the adjustable fuel metering arrangement, the minimum flow area of which has a simply connected convex cross sectional configuration, minimizes the adverse effects of ambient temperature changes.
    Type: Grant
    Filed: January 28, 1980
    Date of Patent: November 23, 1982
    Assignee: Tecumseh Products Company
    Inventor: Vernon R. Kaufman
  • Patent number: 4261174
    Abstract: A temperature-sensitive actuator particularly for varying the pitch of blades spaced around a cooling fan hub. The actuator, as applied to a fan, includes at least first and second circular or part-circular elongate members within the hub, restraining means on the hub for one end of the first elongate member, support means for the first elongate member having a coefficient of expansion different from that of the first elongate member, and which inhibits radial deformation of the first elongate member during thermal expansion or contraction whereby the free end of the first elongate member moves circumferentially, means for transmitting movement of the first elongate member to the second elongate member, and further means between the second elongate member and the blades to vary the pitch of the blades in response to the combined thermal expansion or contraction of the elongate members.
    Type: Grant
    Filed: September 5, 1978
    Date of Patent: April 14, 1981
    Assignee: Quinton Hazell Limited
    Inventor: Aubrey H. Wagstaffe
  • Patent number: 4060192
    Abstract: A fuel control system for a main burner having a dual rate pilot burner and a control device for providing a standby flame flow of fuel to the pilot burner when the output temperature effect of the main burner is above the temperature setting of the control device and for providing a large heater flame flow of fuel to the pilot burner when the output temperature effect of the main burner is below the temperature setting of the control device so that only the heater flame will cause a main flow of fuel to the main burner for a heating operation thereof. A diverter valve is provided for diverting the heater flame flow of fuel from the dual rate pilot burner to another pilot burner so that the main flow of fuel to the main burner will cease even though the output temperature effect of the main burner is below the temperature setting of the control device, the diverter valve being controlled by a timer or the like to provide a "cook and hold" feature of the system.
    Type: Grant
    Filed: August 19, 1976
    Date of Patent: November 29, 1977
    Assignee: Robertshaw Controls Company
    Inventor: Charles D. Branson
  • Patent number: 4023774
    Abstract: An orifice assembly includes a cylindrical orifice unit formed of synthetic resin material and having at one end thereof an end wall with an orifice therethrough. A metallic needle is mounted for reciprocation in the orifice. The needle has an oblique surface which defines with the surface of the orifice a gap which is variable with reciprocation of the needle. A holder element, preferably of metal, surrounds and supports the orifice unit. An annular recess is provided, preferably in the outer surface of the orifice, radially outwardly of the orifice to allow expansion and contraction of the resin material, due to temperature variations, without constraint.
    Type: Grant
    Filed: August 12, 1975
    Date of Patent: May 17, 1977
    Inventor: Hisatoshi Kojima
  • Patent number: 4008454
    Abstract: A differential expansion rod and tube thermostat wherein the material of the inner rod has a much lower coefficient of thermal expansion than does the material of the outer tube. The thermostat is adapted to be mounted through an opening in the wall of an oven cooking cavity. A certain amount of the tube remains outside the oven cooking cavity. The inner rod is adapted to lie within the oven cooking cavity. Joined to the inner rod is an extension strap of a material having a high linear coefficient of thermal expansion substantially the same as that of the outer tube. The longitudinal motion created by the difference in the rates of expansion between the outer tube and the combined inner rod and extension strap is transferred by a hinged amplifier lever to a switch mechanism which is calibrated to operate at a predetermined oven temperature.
    Type: Grant
    Filed: November 4, 1975
    Date of Patent: February 15, 1977
    Assignee: General Electric Company
    Inventor: Teamus Bowling
  • Patent number: 4002039
    Abstract: In a cryogenic cooler, wherein a fluid under pressure is transmitted through an expansion orifice in a nozzle into an expansion chamber at a rate which is controlled by the movement of a needle valve in the expansion chamber, an expander member extends from the nozzle and carries the needle valve. The expander member expands and contracts in response to the temperature in the expansion chamber at a different rate than the needle valve to automatically regulate the flow of fluid into the expansion chamber.
    Type: Grant
    Filed: August 28, 1975
    Date of Patent: January 11, 1977
    Assignee: The Bendix Corporation
    Inventors: Robert L. Cramer, James A. Mientus
  • Patent number: 3999568
    Abstract: A check valve having a piston with a greater coefficient of thermal expansion than the body which closes a bleeder port at running temperatures and opens the bleeder port when flow stops or when the valve cools. A body of brass and a piston of filled TFE is a preferred combination.
    Type: Grant
    Filed: January 13, 1976
    Date of Patent: December 28, 1976
    Inventor: Walter R. Chapman
  • Patent number: 3944135
    Abstract: A condition responsive valve construction having a housing provided with a valve seat. A pair of metallic balls are secured together in abutting relation and are movable toward and away from the valve seat so that one of the balls acts to open and close the valve seat. A lever is movably mounted in the housing and acts between the balls to cause movement thereof upon certain movement of the lever caused by a condition responsive means sensing different conditions. Spring means are provided for tending to hold the balls in the valve seat closed position thereof and in a certain valve seat open position thereof so that the lever can have lost motion travel between the balls for creating a differential in the conditions required to open and close the valve seat.
    Type: Grant
    Filed: July 12, 1974
    Date of Patent: March 16, 1976
    Assignee: Robertshaw Controls Company
    Inventor: Fred Kalinovski