Damper Patents (Class 110/163)
  • Patent number: 10401027
    Abstract: A non-return valve having an accumulation damper movable relative to a housing and shaped like a bowl to accumulate condensate running down from the chimney. The non-return valve has a smaller floating damper made of a material having a density less than water for resting against the accumulation damper when the appliance is in standstill and sealing the drainage holes in the accumulation damper when the condensate accumulation is below a threshold. Once condensate accumulates in the accumulation damper beyond the threshold, the floating damper is buoyed by the condensate thereby breaking the seal with the drainage holes and permitting the condensate to drain through drainage holes in the accumulation damper. When the appliance is operational, exhaust from the appliance lifts the floating damper and, in some cases, the accumulation damper also, to permit exhaust of combustion gases up the chimney.
    Type: Grant
    Filed: March 28, 2017
    Date of Patent: September 3, 2019
    Assignee: IPEX TECHNOLOGIES INC.
    Inventors: Martin Kwan Yu Leung, Filippo Martino
  • Patent number: 10323578
    Abstract: The present invention generally relates to a diverting system to be used in a combined-cycle power plant. According to the invention, the diverting system is integrated within the by-pass stack and carries out, in a sole component, the functions of by-passing the hot exhaust flow in a single-cycle configuration or guiding it through the HRSG, acting as a diffusor, in an open combined-cycle configuration.
    Type: Grant
    Filed: September 29, 2015
    Date of Patent: June 18, 2019
    Assignee: ANSALDO ENERGIA SWITZERLAND AG
    Inventors: Siegfried Trippold, Andre Koenig, Philipp Moller, Joerg Pfistner
  • Patent number: 10161268
    Abstract: A damper assembly for minimizing heat loss through an exhaust stack includes a housing mountable within the stack and an umbrella received within the housing. The umbrella is selectively movable between a first position in which the umbrella is received within the housing, and second position in which the umbrella is extended from the housing such that a peripheral edge of the umbrella is in close association with an interior sidewall of the exhaust stack to minimize a flow of fluid past the umbrella and out of the stack.
    Type: Grant
    Filed: January 13, 2017
    Date of Patent: December 25, 2018
    Assignee: GENERAL ELECTRIC TECHNOLOGY GMBH
    Inventors: Glauco Epis, Luca Angelo Cinquegrani, Luca Rigoni
  • Patent number: 9908393
    Abstract: An apparatus for raising and lowering a vehicle cover is provided. The apparatus includes a flexible member having a first end and a second end, the flexible member configured to flex so that, with the first end positioned adjacent to a vehicle and the second and positioned generally higher than the vehicle, the second end raises the vehicle cover up from the vehicle and lowers the vehicle cover down towards the vehicle. The second end of the flexible member is configured to retain the vehicle cover.
    Type: Grant
    Filed: August 19, 2013
    Date of Patent: March 6, 2018
    Inventor: Daniel Cornew
  • Patent number: 9709264
    Abstract: Provided is a dual venturi having: a tubular part; a body part, for opening/closing the flow of secondary air by rotating in the horizontal plane and vertical plane directions, the horizontal plane direction being the cross-sectional direction of the tubular part and the vertical plane direction being perpendicular to the horizontal plane; a central passageway, becoming the passageway for primary air; a damper part, and a damper part-side secondary gas outlet; a driving part, for rotationally driving the damper part in the horizontal and vertical planes; a gas inlet-side primary gas outlet connected openly to the damper part-side primary gas outlet; and a gas inlet for introducing gas into the tubular part via the damper part, which openly connects selectively to the damper part-side secondary gas outlet on the basis of the rotational position of the damper part, and for forming the rotational shaft of the damper part along with the rotational shaft of the driving part.
    Type: Grant
    Filed: January 21, 2013
    Date of Patent: July 18, 2017
    Assignee: KYUNGDONG NAVIEN CO., LTD.
    Inventor: Jeong Gi Yu
  • Patent number: 9593846
    Abstract: A method of and control apparatus for operation of a boiler plant are described. The boiler plant has a furnace volume, an oxyfuel firing system for oxyfuel combustion of fuel in the furnace volume, and a compression system for compression of gases exhausted from the furnace volume after combustion. The method and control apparatus are characterized by the step of controlling mass flow of gases through the compression system as a means to control pressure within the furnace volume. This invention relates to both single and multi unit arrangements.
    Type: Grant
    Filed: December 9, 2011
    Date of Patent: March 14, 2017
    Assignees: DOOSAN POWER SYSTEMS LIMITED, POWER SYSTEMS SYNETICS LIMITED
    Inventors: Konrad Jerzy Kuczynski, David James Adams
  • Patent number: 9464563
    Abstract: A turbocharger wastegate is provided. The turbocharger wastegate comprises a cover plate actuatable in an open and closed position, the open position enabling exhaust gas flow through a turbine bypass conduit and the closed position inhibiting exhaust gas flow through the turbine bypass conduit and a vibration-dampening extension coupled to the cover plate radially extending beyond a radial periphery of the cover plate. Exhaust gas flow acting on the extension thus reduces vibration of the wastegate, thereby improving durability and reducing unwanted noise.
    Type: Grant
    Filed: December 5, 2012
    Date of Patent: October 11, 2016
    Assignee: Ford Global Technologies, LLC
    Inventors: Alan Eden, Anthony Morelli
  • Patent number: 8807990
    Abstract: A gaseous fuel fired furnace having a vapor condensing flue gas vent conduit, a flue gas flow restrictor disposed in the vapor condensing flue gas vent conduit having a flue gas upstream side and a flue gas downstream side, and a condensate bypass conduit extending around the flue gas flow restrictor having a condensate inlet in fluid communication with the flue gas downstream side of the flue gas flow restrictor and a condensate outlet in fluid communication with the flue gas upstream side of the flue gas flow restrictor.
    Type: Grant
    Filed: December 4, 2012
    Date of Patent: August 19, 2014
    Assignee: Utilization Technology Development, NFP
    Inventors: Shawn Matthew Scott, Lawrence Brand
  • Publication number: 20140020607
    Abstract: An apparatus and method are provided for controlling the introduction of air into a burner. More particularly, the invention provides for a damper system that controls the introduction of air into a burner system by altering the size of a peripheral flow path for the introduction of air into the plenum of the burner.
    Type: Application
    Filed: July 19, 2012
    Publication date: January 23, 2014
    Applicant: John Zink Company, LLC
    Inventors: Erwin M. Platvoet, Thomas M. Korb, Michel Sean McKinney, Ronnie Glen Taylor, Chad Nathan Carroll
  • Patent number: 7849805
    Abstract: A primary air system for a combustion plant provides a flow of primary air to at least one coal pulverizer, which emits pulverized coal in a downstream direction to a furnace. The primary air system includes a first primary air line for feeding hot primary air to the coal pulverizer and a second primary air line for admixing of cold primary air into the hot primary air line at a mixing location positioned upstream of the coal pulverizer. A control system shuts off the flow of primary air to the coal pulverizer, when the coal pulverizer is being repaired or serviced while the furnace is in operation. The control system includes a first flow control butterfly valve disposed in the first primary air line at a position upstream of the mixing location and a second flow control butterfly valve disposed in the second primary air line at a position upstream of the mixing location.
    Type: Grant
    Filed: February 4, 2008
    Date of Patent: December 14, 2010
    Assignee: ALSTOM Technology Ltd.
    Inventors: Hellmuth Brüggemann, Frank Rauch, Hasthika Weerasinghe
  • Patent number: 7717702
    Abstract: A direct sidewall vent system between a fuel-burning appliance in a first space and an external atmosphere, through a wall between the first space and external atmosphere. The direct sidewall vent system has a wall assembly that defines a first passage for communicating combustion gas generated through operation of the fuel-burning appliance to a first outlet through which the combustion gas is communicated to the external atmosphere. The wall assembly further defines a second passage for communicating makeup air from the external atmosphere to the fuel-burning appliance in the first space. The direct sidewall vent system further has an external portion that is situated within the external atmosphere and at which the first outlet is located. The external portion of the direct sidewall vent system has a top, a bottom, and spaced sides.
    Type: Grant
    Filed: July 7, 2005
    Date of Patent: May 18, 2010
    Assignee: Field Controls, LLC
    Inventors: James Lawrence Aycock, Steven E. Guzorek
  • Publication number: 20090181609
    Abstract: An apparatus for a damper cap for a chimney flue includes a top plate having dimensions conforming to a top of the chimney flue. A bird and animal screen is joined to and extends from a bottom of the top plate. The screen has dimensions for insertion into the chimney flue. A rod joined to a center of the top plate extends downward into the chimney flue. A support structure is secured to an interior of the chimney flue. A mechanism is joined to the support structure and the rod for moving the rod in a vertical direction. In an open position the top plate is above the chimney flue to allow smoke to exit and the screen restricts birds and animals from entering. In a closed position the top plate is proximate the chimney flue restricting airflow into and out of the chimney flue and the apparatus is retracted into the flue.
    Type: Application
    Filed: January 9, 2009
    Publication date: July 16, 2009
    Inventor: Daniel Paul Thomas
  • Patent number: 6748880
    Abstract: A flue gas passage arrangement for a steam generator which permits adjustment of the heat transfer effectiveness of a final bank of heat exchanger surface to control a temperature of the flue gas flowing through and exiting from the flue gas passage and conveyed to a downstream NOx reduction device having a minimum operating temperature. The NOx reduction device is advantageously an SCR. Economizer heating surface is located within the flue gas passage, and a baffle plate extends through the flue gas passage and creates two flue gas paths there through. The economizer heating surface may be a single, common bank having a section located in both gas paths, or in only one gas path. Alternatively, two separate banks of economizer heating surface may be employed. A variable position damper is provided in one gas path, either below or above one section.
    Type: Grant
    Filed: December 19, 2001
    Date of Patent: June 15, 2004
    Assignee: The Babcock & Wilcox Company
    Inventor: James F. DeSellem
  • Patent number: 6681497
    Abstract: Integrated web dryer and regenerative heat exchanger, as well as a method of drying a web of material using the same. The apparatus and method of the present invention provides for the heating of air and the converting of VOCs to harmless gases in a fully integrated manner via the inclusion of a regenerative combustion device as an integral element of the drying apparatus.
    Type: Grant
    Filed: November 15, 2002
    Date of Patent: January 27, 2004
    Assignee: Megtec Systems, Inc.
    Inventors: Michael P. Bria, Alan D. Fiers, Andreas C. H. Rühl
  • Publication number: 20030217677
    Abstract: An incinerator includes a furnace having a cylindrical top section, a cyclone separator connected to an effluent outlet of the top section, a tubular member mounted in the top section and defining a flue gas passage, and a flue gas guiding device mounted in the top section below the tubular member and including a seat body vertically aligned with the tubular member, and a plurality of angularly spaced apart helical blades extending radially from the seat body to an inner wall of the top section so as to provide helical movement to a stream of hot combustion gas passing therethrough and so as to split the stream of the hot combustion gas into a stream of high-density flue gas that exits from the effluent outlet, and a stream of low-density flue gas that flows outwardly through the flue gas passage.
    Type: Application
    Filed: May 24, 2002
    Publication date: November 27, 2003
    Inventor: Dai-You Lin
  • Patent number: 6652272
    Abstract: In order to create a device like a shuttle sluice for sluicing or distributing a hot meal-form material flow, in particular for cement plant construction, whose shuttle valve or shuttle valves is or are easy and inexpensive to repair or renew in case of wear and tear, a shuttle sluice is provided, whose shuttle valve has at least two parts and comprising of an upper suspension part and a lower expendable part, whereby the upper suspension part and the lower expendable part of the shuttle valve are stiff or rigid, i.e., detachably connected to each other, not hinged or pivoted to each other.
    Type: Grant
    Filed: January 10, 2003
    Date of Patent: November 25, 2003
    Assignee: KHD Humboldt Wedag AG
    Inventors: Horst Schilling, Ralf Filges
  • Patent number: 6546897
    Abstract: The invention is directed to a thermodynamically activated flue damper for a gas water heater that includes a flue damper for controlling the passage of exhaust gases through the flue; and a thermally sensitive member that is capable of contracting when the exhaust gasses in the flue heat the thermally sensitive member to its transition temperature and expanding when the temperature of the thermally sensitive material falls below its transition temperature. The thermally sensitive member is connected between the flue damper and a support member in the flue to control the pivoting of the flue damper as the thermally sensitive metal expands or contracts at the transition temperature. The flue damper system may also include a counter-balancing member to provide a counter-balancing force to the said thermally sensitive metal, such as a coil spring. The thermally sensitive member may be formed in the shape such as a rod, a wire, and an elongated bar, and may be made from Nytinol or other similar metals.
    Type: Grant
    Filed: February 19, 2002
    Date of Patent: April 15, 2003
    Assignee: American Water Heater Company
    Inventors: Thomas A. Edds, Allen W. Scott
  • Patent number: 6497230
    Abstract: An air port damper system for a recovery boiler employs plural louvers for altering the exit angle of air through an air port. Dampers are provided to enable adjustment of the flow through the device. Suitably, the device may be retracted away from the air port, to enable manual or automatic cleaning of the port. Further the damper system can be removed for maintenance/service purposes, without requiring shut-down of the boiler.
    Type: Grant
    Filed: April 7, 2000
    Date of Patent: December 24, 2002
    Assignee: Anthony-Ross Company
    Inventors: Daniel R. Higgins, Eugene Sullivan, Robert B. Hill
  • Patent number: 6481361
    Abstract: A damper assembly for adjusting a full flow of the air-entrained coal traversing at least one annular conduit along a flow path, wherein the one conduit has a peripheral wall defining the entire cross-sectional area of the conduit, the damper assembly includes an elongated blade, which has its length substantially greater than its width and which is rotatably mounted to the conduit to adjust the flow from no change to approximately 75% of the full flow.
    Type: Grant
    Filed: September 8, 2000
    Date of Patent: November 19, 2002
    Assignee: RJM Corporation
    Inventors: Edmund S. Schindler, Robert W. Monro, Jr.
  • Patent number: 6276929
    Abstract: A method for controlling kiln pressure for a shuttle kiln having an exhaust gas fan and an exhaust gas damper in an exhaust gas passage includes the steps of performing a control operation for controlling the number of revolution of the exhaust gas fan to control flow rate of the exhaust gas to maintain the kiln pressure at a predetermined pressure, and performing a control operation for adjusting opening of the exhaust gas damper based on the number of revolution of the exhaust gas fan. The method can expand the control range of exhaust gas flow, and operation with energy saving efficiency can be performed.
    Type: Grant
    Filed: September 2, 1998
    Date of Patent: August 21, 2001
    Assignee: NGK Insulators, Ltd.
    Inventors: Tsuyoshi Kuroda, Kenji Kawaguchi, Yasuhiro Ito
  • Patent number: 6257155
    Abstract: A damper vane assembly for controlling the flow of flue gas between a flue gas pass of a combustion vessel which generates flue gas and a selective catalytic reactor operable to catalytically treat flue gas in a combustion system is provided. The damper vane assembly includes a first turning vane having a curved extent and a second turning vane with a curved extent. The first turning vane is moveable between a blocking position in which it blocks communication between the combustion vessel and the selective catalytic reactor and a flow guiding position in which the curved extent of the first turning vane guides flue gas from the flue outlet to the selective catalytic reactor. The second turning vane is moveable between a blocking position in which it blocks communication between the selective catalytic reactor and the flue gas outlet and a flow guiding position in which the curved extent of the second turning vane guides flue gas from the selective catalytic reactor to the flue gas outlet.
    Type: Grant
    Filed: October 16, 2000
    Date of Patent: July 10, 2001
    Assignee: Alstom Power N.V.
    Inventor: Benjamin T. Greene
  • Patent number: 6257156
    Abstract: The present document describes a wind box used in the air supply of a chemical recovery furnace, the wind box comprising a frame (1) having at least one air inlet opening (2) and at least one air supply opening (3) through which air is led from an air channel via the wind box to the recovery furnace. The wind box further comprises at least one combined actuator (25) for regulating the air flow through the wind box and for cleaning each air supply opening (3) as well as means (19, 21) for moving each actuator (25). The invention is based on using a cleaning head (15) smaller than the air supply opening (3) when cleaning the air supply opening (3), whereby its path instead of a longitudinal motion is determined to be curved such that one to and from motion of the cleaning head will rub of all deposit from both the upper and the lower edge of the air supply opening (3) and also from the area between these.
    Type: Grant
    Filed: December 22, 1999
    Date of Patent: July 10, 2001
    Assignee: Osmo Kaulamo Engineering Oy
    Inventor: Osmo Kaulamo
  • Patent number: 6220188
    Abstract: The windbox burner has a register casing (2) with ports (3) for inflow of combustion air, secondary air pipe (35) enclosed by the register casing and having inlet ports (36) for secondary air, a ring damper (20) coaxial with the register casing and axially displaceable and having at each end an annular sealing means (21; 26) which in the closed position of the ring damper sealingly abuts a corresponding sealing arrangement (23; 22) at each axial end of the ports (3), thus preventing the combustion air from flowing through the ports (3) to the burner tip. Each of the sealing arrangements (21, 23; 22, 26) is made of a stainless and heat-resistant material, and each pair of the sealing arrangements is constituted by a plane leaf spring (23; 26) the plane of which is substantially perpendicular to the longitudinal axis of the ring damper (20), and a ring (21, 22) with a convex surface on which the leaf spring abuts tangentially in the closed position of the ring damper.
    Type: Grant
    Filed: March 9, 1999
    Date of Patent: April 24, 2001
    Assignee: Burmeister & Wain Energi A/S
    Inventor: Bruno Boutrup
  • Patent number: 6076476
    Abstract: An apparatus for preventing the emission of dioxins in an incineration facility including an incinerator having a boiler, and an exhaust gas treatment facility for treating exhaust gas discharged from a flue of the boiler. This apparatus further includes a steam supply pipe for supplying steam into a water tube or a downcomer of the boiler from an auxiliary boiler or another steam-generating source, a flue damper for opening and closing the flue of the boiler, a detector for detecting the temperature of gas within the boiler at a point disposed upstream of the flue damper, and a damper control device responsive to a temperature, detected by the detector, for opening and closing the flue damper.
    Type: Grant
    Filed: February 25, 1998
    Date of Patent: June 20, 2000
    Assignee: Sumitomo Heavy Industries, Ltd.
    Inventors: Kiyotaka Yano, Minoru Sumitomo
  • Patent number: 5997277
    Abstract: This invention relates to a method and device for recovery of energy from a medium containing combustible substances even at low concentrations. The method is characterized by raising the temperature of the medium in a regenerative combustor such as a reversal flow direction combustion device wherein the combustion takes place in a warm zone, to the combustion temperature at which essentially all chemical energy of the combustible substances is transformed into thermal energy. The heated medium is then utilized for the production of a wanted form of energy.
    Type: Grant
    Filed: May 19, 1998
    Date of Patent: December 7, 1999
    Assignee: Megtec Systems AB
    Inventors: Bjorn Heed, .ANG.ke Kallstrand
  • Patent number: 5824275
    Abstract: An air nozzle assembly for use in associated combustion apparatus which includes a first elongated housing having first and second axial extremities. The first axial extremity thereof is open to the interior of the first housing and tapers axially from a larger to a smaller cross section that constitutes a generally flat nozzle at the first axial extremity. A second elongated housing has first and second axial extremities. The fist axial extremity is open to the interior of the second housing, at least the first axial extremity and an axial portion of the second elongated housing are dimensioned and configured to extend with at least the first axial portion disposed within the first elongated housing. The first axial portion tapers axially from a larger to a smaller cross section at the first axial extremity. The apparatus also includes means for selectively preventing flow in the second elongated housing.
    Type: Grant
    Filed: March 7, 1995
    Date of Patent: October 20, 1998
    Assignee: Combustion Engineering, Inc.
    Inventors: Alan S. Bitzer, George J. Prohazka
  • Patent number: 5738021
    Abstract: An air damper assembly for a coal-fired furnace in which a damper sleeve extends between two spaced walls adjacent the furnace in a manner to define an air inlet. A threaded support member is connected to the damper, and a threaded shaft is in threaded engagement with the support member. Rotation of the shaft causes corresponding movement of the support member, and therefore the damper, to vary the size of the opening and therefore the amount of air introduced into the furnace.
    Type: Grant
    Filed: February 6, 1996
    Date of Patent: April 14, 1998
    Assignee: Foster Wheeler Energy International, Inc.
    Inventors: Joel Vatsky, Walter Van Dyke
  • Patent number: 5730070
    Abstract: An apparatus for introducing gas recirculation into a furnace to control steam temperature includes a hot air chamber for receiving hot air from an air preheater. The hot air chamber has at least one outlet communicating with the interior of the furnace. The apparatus includes a recirculation gas chamber for receiving recirculation gas from a recirculation fan and includes at least one outlet communicating with the interior of the furnace. Each of the chambers is disposed about at least a portion of the circumference of the furnace with one of the chambers disposed above at least a portion of the other. Ducts are provided between the hot air chamber and the air preheater and between the recirculation gas chamber and the recirculation fan to provide communication between the elements. A passageway is disposed between the hot air chamber and the recirculation gas chamber.
    Type: Grant
    Filed: December 22, 1995
    Date of Patent: March 24, 1998
    Assignee: Combustion Engineering, Inc.
    Inventors: Robert C. Kunkel, Thomas J. Dunn, Jr.
  • Patent number: 5609522
    Abstract: A combination damper and chimney cap apparatus is provided to ventilate a fireplace and a flue connected thereto to provide a draft through the flue. The apparatus includes a platform constructed and arranged to be removably mounted to the flue and formed with an aperture extending therethrough in communication with the flue. An element senses temperature-smoke at the flue and at an area external to a fireplace connected to the flue to provide a signal in response to the temperature-smoke. A ventilation fan is connected to the a support to provide a draft sufficient to exhaust the smoke from the fireplace and the flue and to cool a electronic motor for the apparatus.
    Type: Grant
    Filed: January 18, 1995
    Date of Patent: March 11, 1997
    Inventor: Henry S. Szwartz
  • Patent number: 5292063
    Abstract: A stack damper control apparatus for positioning a stack damper and controlling a fuel source in response to closing of a temperature sensitive switch. Limit switches comprising drop cams are coupled to the drive shaft of the damper. In response to a call for heat, a motor turns the damper, coupling a source of energy to a fuel source when the damper is open and the limit switches transfer. A relay coil is energized to hold open a switch providing a parallel energization path for the motor. When the call for heat has been met and the temperature sensitive switch opens, the relay de-energizes closing the parallel energizing path and allowing the motor to close the damper. Provision is made for a safety interlock to ensure the fuel source is not activated when the damper is closed. Provision is also made for interface to a blocked vent shutoff system.
    Type: Grant
    Filed: February 4, 1992
    Date of Patent: March 8, 1994
    Assignee: Johnson Service Company
    Inventor: Michael J. Klaus
  • Patent number: 5259411
    Abstract: A flow control has a rotary gate residing within an internal flow space in a conduit. The gate is mounted for movement relative to the conduit between first and second positions, the gate in the first and second positions accounting for a different flow rate between first and second fluid masses between which the gate resides. The gate has an actuator with a plurality of spaced shoulders. A flexible force-applying member is connected to the actuator and bears upon the shoulders to thereby urge the gate towards the other of the first and second positions. The shoulders are situated so that the number of shoulders engaged by the force-applying member at any one time is not the same as the gate moves from the one of the first and second positions towards the other of the first and second positions.
    Type: Grant
    Filed: November 2, 1992
    Date of Patent: November 9, 1993
    Assignee: The Field Controls Division of Heico, Inc.
    Inventor: Steven E. Guzorek
  • Patent number: 5244147
    Abstract: A method of controlling the pressure in an incinerator for incinerating municipal refuse, industrial waste, etc. Exhaust gas from an incinerator typically passes through an exhaust gas cooler and an exhaust gas treating device and then discharged into the atmosphere by the action of an induced draft fan. In a method of controlling the pressure in such an incinerator for incinerating municipal refuse, industrial waste, etc. gas, e.g., part of the flow of exhaust gas induced by the induced draft fan or air taken in from the atmosphere, is added to a gas flow path upstream of the inlet of the induced draft fan through an addition gas line provided with an addition gas control damper. The addition gas control damper is controlled on the basis of an output from a furnace pressure controller such that when the furnace pressure is relatively high, the flow rate of the addition gas is reduced, whereas, when the furnace pressure is relatively low, the flow rate of the addition gas is increased.
    Type: Grant
    Filed: March 26, 1992
    Date of Patent: September 14, 1993
    Assignee: Ebara Corporation
    Inventor: Masaaki Furukawa
  • Patent number: 5239947
    Abstract: A vent damper for limiting the flow of ambient air in a hot water heater including a main burner, a pilot light burner and a central core for evacuation of exhaust gases from the main burner and pilot light burner. The vent damper comprises an inner shell having legs that extend downwardly and attach to a central baffle which directs the flow stream of exhaust gases passing through the exhaust port, a closure element slidably engaged about the inner shell which is movable between an open position and a closed position, a deflector attached to the upper end of the inner shell for deflecting downdrafts and limiting the upward travel of the seal ring, and an outer shell attached to the deflector that houses the aforementioned components.
    Type: Grant
    Filed: May 22, 1992
    Date of Patent: August 31, 1993
    Inventor: Werner K. Schimmeyer
  • Patent number: 5167192
    Abstract: A controller for a damper in a chemical recovery furnace relieves physical engagement between the damper mechanism and an operating handle therefor when such handle is being repositioned. The damper is repositioned to prevent interference with an adjacent port cleaner.
    Type: Grant
    Filed: February 28, 1991
    Date of Patent: December 1, 1992
    Assignee: Anthony-Ross Company
    Inventors: Kenneth A. Pingel, Daniel R. Higgins
  • Patent number: 4981262
    Abstract: An improved unit (10) which supplies combustion air (A) to a furnace (100) or hot water heater (200) is described. The unit includes a switch (59) which continues the operation of motor (14) and fans (12 and 15) in unit (10) until the hot flue gases (H) are vented and to cool exhaust gas pipe (22) after the furnace and/or hot water heater cease to operate to produce heat.
    Type: Grant
    Filed: August 14, 1989
    Date of Patent: January 1, 1991
    Inventor: Bert W. Jackson
  • Patent number: 4880376
    Abstract: Damper position of a damper in a heating system is monitored. The damper is movable between end positions in response to movement of a motor shaft. The motor shaft moves in response to a movement request signal. A shaft position signal is received by a position detector and has a value representative of position of the motor shaft. When the damper reaches an end position, it is determined whether the value of the shaft position signal is within a predetermined tolerance. If it is outside of the tolerance, then the system is shut down as unreliable; otherwise, the shaft position signal is recalibrated to maintain accuracy.
    Type: Grant
    Filed: January 27, 1989
    Date of Patent: November 14, 1989
    Assignee: Honeywell Inc.
    Inventors: James I. Bartels, Paul B. Patton, Kenneth B. Kidder, Alfred J. Gaskell
  • Patent number: 4803931
    Abstract: A flue restrictor to control air flow in a combustion apparatus having an exhaust system that includes a flue. The restrictor has a housing to be attached in the flue. There is a first valve member located in the housing and a second valve member located in the housing. Each valve member is composed of open and closed areas, and cooperates with the other valve member to act as a valve. Movement of one valve member relative to the other controls air flow in the restrictor, and thus in the combustion apparatus. The restrictor provides sensitive control and ease of adjustment in position.
    Type: Grant
    Filed: April 9, 1986
    Date of Patent: February 14, 1989
    Inventor: Brian Carson
  • Patent number: 4779795
    Abstract: According to the present invention there is provided a boiler comprising a firebox, a control device controlling the flow of air into the firebox, a water jacket surrounding at least part of the firebox, a sensor to sense the temperature of the water in or being discharged from the water jacket, the sensor being adapted to control directly or indirectly the control device. The sensor can be a temperature sensitive valve associated with the water jacket to control the position of the control device to thereby govern the flow of air to the firebox. The invention further provides a method of providing space heating and hot water from a boiler unit comprising the operation of a boiler unit.
    Type: Grant
    Filed: June 16, 1987
    Date of Patent: October 25, 1988
    Inventor: John A. Winmill
  • Patent number: 4777932
    Abstract: A barometric damper includes a swingably mounted damper blade having a first adjustable counterweight assembly lying in a common plane with the damper blade and mounted for rotation therewith. The torque arm mass loading can be varied. A second adjustable counterweight assembly coupled to the damper shaft adjusts the static control point of the damper.
    Type: Grant
    Filed: October 6, 1986
    Date of Patent: October 18, 1988
    Assignee: Regenerative Environmental Equipment Co. Inc.
    Inventor: Rodney L. Pennington
  • Patent number: 4770108
    Abstract: A vent cap for a heat treating furnace provides bidirectional pressure relief. The cap is weighted and balanced over the furnace vent such that the vent is closed as long as the furnace has a slightly positive internal pressure. If the internal pressure exceeds a preselected upper limit the cap opens the vent to relieve the overpressure. The vent cap has a controlled inlet which opens to equalize the pressure differential if the internal pressure falls below a preselected lower limit below the ambient pressure outside the furnace. Such controlled equalization prevents the formation of undesirable combustible mixtures of air and treating gas in the furnace.
    Type: Grant
    Filed: July 28, 1987
    Date of Patent: September 13, 1988
    Assignee: Abar Ipsen Industries, Inc.
    Inventor: Michael J. Ebert
  • Patent number: 4770158
    Abstract: A combustor including a combustion chamber having two paths for removing combustion exhaust gases, a valve in one path, and means to provide, when the valve is in a closed position, pressure at a downstream side of the valve higher than the pressure inside the combustion chamber to prevent leakage of combustion gases from the combustion chamber through the valve.
    Type: Grant
    Filed: April 27, 1987
    Date of Patent: September 13, 1988
    Assignee: Nu-Tec Incorporated
    Inventor: Peter S. Albertsen
  • Patent number: 4770160
    Abstract: An improved vent damper for oil or natural gas-fired hot water heaters includes a damper assembly incorporated into the exhaust duct above a hot water heater, and contains a lightweight, floating poppet closure slidably mounted on a reduced-diameter exhaust pipe. When the hot water heater's main burner is operating, hot exhaust gasses lift the floating poppet closure, and the gasses escape through the gap thereby created around its base. These exhaust gasses are then vented to the outside air via an exhaust duct. When the main burner is turned off again, the floating poppet closure falls back again to its original (closed) position, thereby blocking the exhaust duct and preventing cool room air from circulating through the heater and its central core. Pilot light exhaust gasses are able to continuously escape through the reduced-diameter exhaust pipe even when the floating poppet closure is in the closed position.
    Type: Grant
    Filed: May 29, 1986
    Date of Patent: September 13, 1988
    Inventor: Werner K. Schimmeyer
  • Patent number: 4702178
    Abstract: An emergency exhaust system (59) is provided for a mobile incineration system (10). A hinged gate (76) controls access to the emergency exhaust system (59), and operates only upon the sensing of a malfunction in one of a plurality of critical incineration system components (114, 36, 56) by sensors/relays (122-126). A malfunction as sensed by Sensors/relays (122-126) causes the power to be cut through switch (98) to the main incineration system components (114, 36, 56, 46, 116, 118, 22). In a preferred embodiment, the emergency exhaust system (59) comprises a plurality of water sprayers (64) to cool the volatile waste combustion products, and a granulated activated carbon column (68) to remove hazardous substances.
    Type: Grant
    Filed: May 27, 1986
    Date of Patent: October 27, 1987
    Assignee: Shirco Infrared Systems, Inc.
    Inventor: James N. Welsh
  • Patent number: 4643862
    Abstract: Disclosed herein is a preferred process for making a catalyst. A catalyst such as is named in the title of this invention. The process begins with the chosing and blending the different refractories in order to necessitate the longevity of the damper. The mixing of the materials, with water, to the right consistency is very important in this process. To much moisture in the material will not provide the necessary porosity the catalyst needs. After mixing, the dampened material is placed into a two piece break away mold and pressed into the desired shape, size and density. The proper amount of curing time and the damp cool area in which the curing is to take place also adds to the longevity of the damper. The object of this invention is to provide an inexpensive process that doesn't require heat, for manufacturing a catalyst that will not become contaminated or less active with use, but by it's causing a more complete combustion, will create a higher BTU output and a decrease in fuel consumption.
    Type: Grant
    Filed: July 16, 1985
    Date of Patent: February 17, 1987
    Inventor: Earnest J. Callahan
  • Patent number: 4570549
    Abstract: An improved splitter for use with a coal-fired furnace utilizing a low load burner in which a splitter is provided in the main conduit leading from the pulverizer for splitting the stream of coal and air into two separate streams which are then fed to separate nozzles communicating with the furnace. The splitter includes a damper assembly defining a gap which can be adjustable and including a plurality of projections which prevent coal slippage along the damper blade.
    Type: Grant
    Filed: May 17, 1984
    Date of Patent: February 18, 1986
    Inventor: Norman K. Trozzi
  • Patent number: 4553731
    Abstract: A fail-closed gas safety valve system for blast furnace stove operations employing two tight seal butterfly valves, one a gas shutoff valve and the other a gas regulating valve, which together operate to prevent the leakage of hazardous gas into a blast furnace stove area in the event the supply of air to the stove is interrupted because of a power or a hydraulic failure.
    Type: Grant
    Filed: September 7, 1984
    Date of Patent: November 19, 1985
    Assignee: Bethlehem Steel Corporation
    Inventor: John A. Carpenter
  • Patent number: 4526160
    Abstract: Apparatus for cooperation with an associated flue having a first axis extending away from a point proximate to an associated combustion chamber which includes a funnel shaped member having first and second ends. The second end is larger than the first end. A damper is disposed in the associated flue which has a generally central bore. The damper is mounted in the associated flue for rotation about a second axis which is generally perpendicular to the first axis and the funnel shaped member is mounted with the first end higher than the second end and with the second end extending into the damper. The mounting for the damper may comprise at least one rod shaped member extending through at least one wall of the associated flue. The mounting for the funnel shaped member may comprise a plurality of elongated members extending radially from the funnel shaped member to the associated flue.
    Type: Grant
    Filed: June 2, 1980
    Date of Patent: July 2, 1985
    Inventor: John C. Ickes
  • Patent number: 4493311
    Abstract: A guillotine damper for use in exhaust or like duct systems which must be entered by men for servicing has its frame provided with guides extending about the flow path from one end of the opening by which the blade enters an air tight bonnet to the other end thereof and enclosed by resiliently flexible metal seals. The blade has marginal channels coextensive with the guides with the channels closely fitting the guides and compressing the sides of the seals with zero leakage attained by sealing air discharged along the channels during movement of the blade and while the damper is closed.
    Type: Grant
    Filed: October 19, 1983
    Date of Patent: January 15, 1985
    Assignee: Bachmann Industries, Inc.
    Inventor: Lothar Bachmann
  • Patent number: 4487137
    Abstract: An auxiliary exhaust system for use with a flue includes a conduit communicating at one end with an opening formed in the flue wall and a blower operable to introduce auxiliary air into the flue through the conduit. The conduit is angled so that the auxiliary air enters the flue with a velocity component extending in the downstream direction of the flow of the products of combustion to aid in venting the combustion unit. A damper located within the conduit operates an on-off switch in a blower control circuit which starts and stops the blower when the damper is opened and closed, respectively. The blower control circuit also includes an automatic combustion control which is responsive to flue temperature to increase the speed of the blower whenever the flue temperature is below a predetermined value and to decrease the blower speed whenever the flue temperature is above a predetermined value. The blower includes an access port which enables a fire extinguishing chemical to be introduced into the flue.
    Type: Grant
    Filed: January 21, 1983
    Date of Patent: December 11, 1984
    Inventors: George T. Horvat, Stephen D. Horvat
  • Patent number: 4484562
    Abstract: A flexible disk damper which is capable of providing tight seals for a large diameter opening over a wide range of temperatures. Disks are made sufficiently flexible to compensate for inherent warpage in the damper seat by using a steel with a higher yield strength. Additionally, a varying cross-sectional thickness of the flexible disk is provided to ensure that unit stress is not exceeded along any point of the radius of the flexible disk for the deformation required to provide a tight seal. A pneumatic cylinder is utilized to provide a constant pressure to the flexible disks. A damper seat is fabricated from a cut plate or flat bar which is formed in an annulus. A deflection cone is utilized to deflect flue gases. The flexible disk is coupled together by bolts which are disposed in holes sufficiently large to allow independent movement of the disks to maximize deflection.
    Type: Grant
    Filed: May 6, 1983
    Date of Patent: November 27, 1984
    Assignee: Adolph Coors Company
    Inventor: Daryl D. Burt