Normally Open Bypass Or Relief Passage Closed By Increased Pressure Or Flow Patents (Class 417/299)
  • Patent number: 10234185
    Abstract: A water purifier with an ice maker is provided that includes an ice making part having an evaporator and a circulation cooling part that circulates water stored in a cold water tank to the evaporator so that the water stored in the cold water tank is cooled by heat exchange with refrigerant flowing in the evaporator, to simultaneously make ice and cool water using a single evaporator and eliminating the need to make separate ice so as to cool water, thereby enhancing energy efficiency.
    Type: Grant
    Filed: September 29, 2016
    Date of Patent: March 19, 2019
    Assignee: Coway Co., Ltd
    Inventors: Jin Hwan Noh, Hee-Do Jung
  • Patent number: 10066622
    Abstract: A compressor may include first and second scrolls, a seal assembly and a valve ring. The first scroll may include a first end plate having a discharge passage, a modulation port, and a biasing passage. The modulation port may be in communication with a first pocket formed between spiral wraps of the first and second scrolls. The biasing passage may be in communication with a second pocket formed between spiral wraps of the first and second scrolls. The modulation valve ring is axially displaceable relative to the seal assembly and the first scroll between first and second positions. The valve ring may abut an end plate of the first scroll and close the modulation port when in the first position. The valve ring may abut an axially-facing surface of the seal assembly and is spaced apart from the end plate to open the modulation port when in the second position.
    Type: Grant
    Filed: July 17, 2017
    Date of Patent: September 4, 2018
    Assignee: Emerson Climate Technologies, Inc.
    Inventors: Dennis D. Pax, Stephen Barry Tummino, Troy R. Brostrom, Anthony Joseph Dahlinghaus, Brian R. Butler, Hua Xu, Mindy Lanzer
  • Patent number: 10018190
    Abstract: A valve plate or end cap includes a running surface having a pair of arcuate kidney ports formed thereon. The running surface also includes a plurality of pressure gradient grooves formed on the running surface, each pressure gradient groove having a proximal end adjacent to a respective one of the ends of one of the kidney ports and a distal end. The distal end of one of the pressure gradient grooves associated with one kidney port may overlap the distal end of a pressure gradient groove associated with the other kidney port. The distal end of at least one of the pressure gradient grooves is located outside the circumference of a pitch circle that passes through the center of each kidney port. The distal end of at least one of the other pressure gradient grooves is located inside the pitch circle circumference.
    Type: Grant
    Filed: May 19, 2017
    Date of Patent: July 10, 2018
    Assignee: Hydro-Gear Limited Partnership
    Inventor: Nathan W. Bonny
  • Patent number: 9970440
    Abstract: A screw compressor is provided having adjustable internal volume ratio, including a body and a male rotor, a female rotor and a slide valve configured inside the body, a groove being configured at one side of the male rotor and the female rotor, and the slide valve being configured inside the groove with the slide valve movable inside the groove from a first position corresponding to a minimum internal volume ratio to a second position corresponding to a maximum internal volume ratio.
    Type: Grant
    Filed: July 13, 2015
    Date of Patent: May 15, 2018
    Assignees: Johnson Controls Technology Company, Johnson Controls Air Conditioning and Refrigeration (Wuxi) Co. Ltd.
    Inventor: Yu Zhu
  • Patent number: 9879700
    Abstract: A control system may receive sensor data indicative of respective fluid levels of two or more hydraulic accumulators configured to operate at respective target fluid levels within a hydraulic system. The control system may determine respective errors of the hydraulic accumulators based on the respective fluid levels and respective target fluid levels of the hydraulic accumulators. The respective errors may correspond to pressure errors, fluid volume errors, or other types of errors of the hydraulic accumulators. Responsive to determining the respective errors, the control system may determine that the error of a given hydraulic accumulator is greater than errors of the other hydraulic accumulators and provide instructions to control a hydraulic valve to supply fluid from a single pump of the hydraulic system to the given hydraulic accumulator.
    Type: Grant
    Filed: October 9, 2014
    Date of Patent: January 30, 2018
    Inventors: Zachary John Jackowski, Stephen Berard, Alex Khripin, Alfred Anthony Rizzi
  • Patent number: 9115850
    Abstract: A priority valve assembly includes a fluid supply line, a first fluid discharge line, and a second fluid discharge line, both of which are to be supplied with fluid via the fluid supply line. A priority valve throttles a fluid flow from the fluid supply line into the second fluid discharge line to prioritize the supply of fluid to the first fluid discharge line over the supply of fluid to the second fluid discharge line if a control parameter which is characteristic for an inlet fluid pressure (pE) in the fluid supply line falls below a first predetermined threshold value (p2). The priority valve reduces the throttling of the fluid flow from the fluid supply line into the second fluid discharge line if the control parameter falls below a second predetermined threshold value (p4) which is smaller than the first predetermined threshold value (p2).
    Type: Grant
    Filed: December 7, 2012
    Date of Patent: August 25, 2015
    Assignee: AIRBUS OPERATIONS GMBH
    Inventor: Lars Hoffmann
  • Patent number: 8973598
    Abstract: A priming valve device for a beverage machine. The device includes a casing assembly including a water inlet, a water outlet, and a drain and venting portion for discharging water or air during priming and a valve assembly associated with the casing assembly. The valve assembly includes a valve member which is moveable to a closed position which closes the water outlet by elastic return when the pressure in the water inlet decreases under the elastic return pressure of the valve member.
    Type: Grant
    Filed: November 27, 2006
    Date of Patent: March 10, 2015
    Assignee: Nestec S.A.
    Inventors: Stefan Etter, Sandro Zingg
  • Patent number: 8628316
    Abstract: A compressor includes a housing, a first scroll member, a second scroll member and a modulation assembly. The first scroll member includes a first end plate having a discharge passage, a first spiral wrap, and a first aperture extending through the first end plate. The second scroll member includes a second end plate having a second spiral wrap extending therefrom and meshingly engaged with the first spiral wrap to form a series of pockets. The first aperture is in communication with a first of the pockets. The modulation assembly is in communication with the first aperture and is operable in a full capacity mode where the first aperture is isolated from a suction pressure region providing full capacity operation and in a reduced capacity mode where the first aperture is in communication with the suction pressure region providing approximately zero capacity operation.
    Type: Grant
    Filed: June 23, 2011
    Date of Patent: January 14, 2014
    Assignee: Emerson Climate Technologies, Inc.
    Inventors: Robert C. Stover, Masao Akei
  • Patent number: 8439069
    Abstract: A valve assembly is provided that is suitable for use as an air release valve. The valve mechanism is actuated by liquid forced through an orifice by a diaphragm under pressure from the main discharge and is less prone to valve chatter under varying pressure conditions. The use of an externally adjustable orifice and/or regulator allows the valve assembly to operate satisfactorily in a wide range of pressures. The mode of operation of the valve mechanism is externally visible.
    Type: Grant
    Filed: January 12, 2007
    Date of Patent: May 14, 2013
    Assignee: The Gorman-Rupp Company
    Inventor: Tommy William Yeater
  • Patent number: 8313318
    Abstract: A compressor including a housing defining a suction pressure region and a discharge pressure region includes first and second scroll members forming compression pockets. A first chamber located on the first end plate of the first scroll member includes first and second passages and a first aperture extending therethrough and in communication with the first chamber. The first aperture provides communication between a compression pocket and the first chamber. A piston in the first chamber is axially displaceable to isolate the first passage from communication with the second passage when in first and second positions, prevent communication between the first aperture and the first passage when in the first position, and provide communication between the first aperture and the first passage when in the second position.
    Type: Grant
    Filed: May 29, 2009
    Date of Patent: November 20, 2012
    Assignee: Emerson Climate Technologies, Inc.
    Inventors: Robert C. Stover, Masao Akei
  • Patent number: 7988434
    Abstract: A compressor may include a housing and first and second scroll members supported within the housing, each having an end plate with a spiral wrap extending therefrom and meshingly engaged with the other to form a series of compression pockets operating at an intermediate fluid pressure between a suction pressure and a discharge pressure. A first passage in communication with one of the compression pockets extends from a first side of the first end plate to a second side of the first end plate generally opposite the first side. A modulation plate overlies the second side of the first scroll member for radial displacement between first and second positions. The modulation plate isolates the first passage from communication with a suction pressure region of the compressor when in the first position and provides communication between the first passage and the suction pressure region when in the second position.
    Type: Grant
    Filed: May 29, 2009
    Date of Patent: August 2, 2011
    Assignee: Emerson Climate Technologies, Inc.
    Inventors: Robert C. Stover, Masao Akei
  • Patent number: 7988433
    Abstract: A compressor may include a shell assembly defining suction and discharge pressure regions, first and second scroll members disposed within the shell assembly, and a capacity modulation assembly. The first scroll member may include a first end plate defining a discharge passage, a biasing passage, a modulation port, a first spiral wrap extending from a first side of the first end plate, and an annular hub extending from a second side of the first end plate. The second scroll member may include a second spiral wrap meshingly engaged with the first spiral wrap forming a suction pocket in communication with the suction pressure region, intermediate compression pockets, and a discharge pocket in communication with the discharge passage. A first intermediate compression pocket may be in communication with the biasing passage and a second intermediate compression pocket may be in communication with the modulation port.
    Type: Grant
    Filed: April 6, 2010
    Date of Patent: August 2, 2011
    Assignee: Emerson Climate Technologies, Inc.
    Inventors: Masao Akei, Roy J. Doepker, Keith J. Reinhart
  • Patent number: 7976295
    Abstract: A compressor includes a housing, a first scroll member supported within the housing and having a first end plate with a discharge passage, and a second scroll member supported within the housing and having a second end plate with a second spiral wrap extending therefrom and meshingly engaged with the first spiral wrap to form a series of pockets. A first aperture extends through the first end plate and is in communication with a first product of the series of pockets. A modulation assembly axially biases the first scroll member into engagement with the second scroll member when the first aperture is in communication with a suction pressure region of the compressor.
    Type: Grant
    Filed: May 29, 2009
    Date of Patent: July 12, 2011
    Assignee: Emerson Climate Technologies, Inc.
    Inventors: Robert C. Stover, Masao Akei
  • Patent number: 7976296
    Abstract: A compressor may include a housing, orbiting and non-orbiting scroll members, a first porting, and a second porting. The first and second porting may each extend through the end plate of the non-orbiting scroll member and may each have an angular extent of at least twenty degrees. An ending point of the first porting may be rotationally spaced from a starting point of the first porting by the angular extent in a rotational direction of a drive shaft of the compressor. An ending point of the second porting may be rotationally spaced from a starting point of the second porting by the angular extent in a rotational direction opposite the rotational direction of the drive shaft. The ending point of the second porting may be rotationally spaced from the starting point of the first porting by less than one hundred and eighty degrees in the rotational direction of the drive shaft.
    Type: Grant
    Filed: December 2, 2009
    Date of Patent: July 12, 2011
    Assignee: Emerson Climate Technologies, Inc.
    Inventors: Robert C. Stover, Masao Akei
  • Patent number: 7972125
    Abstract: A compressor may include a housing, first and second scroll members, and a compressor output adjustment assembly. The first scroll member may define a first chamber having first and second passages in communication therewith, a second chamber having third and fourth passages in communication therewith, and first and second apertures. The first and third passages may be in communication with a first pressure source and the second and fourth passages may be selectively in communication with a second pressure source. The compressor output adjustment assembly may include a first piston located in the first chamber and displaceable between first and second positions and a second piston located in the second chamber and displaceable between first and second positions. The first piston may isolate the first aperture from the first passage and the second piston may isolate the second aperture from the third passage when in their respective second positions.
    Type: Grant
    Filed: May 29, 2009
    Date of Patent: July 5, 2011
    Assignee: Emerson Climate Technologies, Inc.
    Inventors: Robert C. Stover, Masao Akei, Michael M. Perevozchikov
  • Patent number: 7891955
    Abstract: A compressor having a dual slide valve assembly is disclosed. The slide valve assembly includes: i) a volume slide valve mechanism that is slidably movable to control compressor volume ratio and power input to the compressor; and ii) a capacity and volume slide valve mechanism that is in operational association with the volume slide valve mechanism, and the capacity and volume slide valve mechanism is slidably movable to control compressor capacity and to control volume ratio and power input to the compressor. In at least some embodiments, the compressor is a rotary gas compressor for a compression (e.g., refrigeration) system. A method of increasing compressor efficiency using the dual slide valve assembly is also disclosed. Compressor volume load and/or volume ratio and/or compressor power input can be simultaneously controlled by both the volume slide mechanism and the capacity and volume slide mechanism. Advantageously, compressor efficiency is increased.
    Type: Grant
    Filed: February 22, 2007
    Date of Patent: February 22, 2011
    Inventor: Jean Louis Picouet
  • Publication number: 20100092314
    Abstract: Once the production route by the tubing has been selected, the stem travels through the inside of a guide whose upper end has a diameter adjusted to that of a rod which develops, increasing until it is connected to a barrel. The upper part of a anchor is arranged in the lower part of the barrel. The lower part of the anchor is connected to a nipple fixed to a transfer box. The fluid passage from an admission valve to the barrel in the upward stroke and the emptying of the barrel in the downward stroke is linked at least with a connector disposed between a basket and the transfer box. The basket houses the ball and the seat of at least one production valve arranged together with at least one connector in a carrier body retained between the transfer box on the top and a cage at the bottom and fitted to a conduit. The admission valve is housed inside the cage and it is provided with a ball that releases or obstructs the fluid passage.
    Type: Application
    Filed: March 27, 2009
    Publication date: April 15, 2010
    Inventor: Carlos Alberto CIFUENTES
  • Publication number: 20090129941
    Abstract: A method for controlling a pump arrangement comprising a fluid delivering pump having a pump drive, a bypass line having a bypass valve for routing fluid back from an outlet side of the pump to a reservoir is disclosed. During ramping up the pump drive to a predetermined target rotational speed, the bypass valve is controlled to reduce a volume flow through the pump so that the volume flow, at a respective delivery height, lies between a cavitational volume flow and the cavitational volume flow increased by a predetermined maximum volume flow deviation.
    Type: Application
    Filed: October 31, 2008
    Publication date: May 21, 2009
    Inventor: Sebastian Haas
  • Publication number: 20090085312
    Abstract: A pressure keeping mechanism is provided downstream of a discharge port of a compressor. The pressure keeping mechanism is set to a small flow path area having only a bypass orifice until a pressure in a downstream pipe reaches a predetermined pressure after the operation is started, the pressure keeping mechanism is set to a large flow path area of a pressure keeping valve which is opened when the pressure exceeds the predetermined pressure and the bypass orifice, thereby changing the flow path area at least in two stages. The pressure in the upstream pipe which is almost closed by the pressure keeping valve can be thus increased at a dash and the pressure in a compression chamber can also be increased swiftly immediately after the compressor is started.
    Type: Application
    Filed: September 29, 2008
    Publication date: April 2, 2009
    Applicant: Hitachi, Ltd.
    Inventors: Shunsuke Mori, Kazutaka Suefuji
  • Patent number: 7451780
    Abstract: A valve apparatus is disclosed for use in regulating the flow of fluid between a closed hydraulic loop and a fluid source in a hydraulic circuit, where the valve apparatus provides up to four different functions including a check valve, a neutral valve, a relief valve and a pressure rise rate valve. The apparatus includes a valve seat for selectively permitting fluid communication between the closed hydraulic loop and the fluid source, a sleeve member and a relief poppet in the valve seat, a relief compression spring inside the sleeve and positioned adjacent the relief poppet and the base of the slidable member, a valve guide and an accumulator piston slidably mounted within the valve guide to define an accumulator volume therein.
    Type: Grant
    Filed: May 16, 2006
    Date of Patent: November 18, 2008
    Assignee: Hydro-Gear Limited Partnership
    Inventor: Robert E. Trimble
  • Patent number: 7334597
    Abstract: Bypass valve assembly that selectively establishes a bypass path for a fluid delivery system and having a body member with a fluid inlet and a bypass fluid outlet, a slidable piston assembly and a slidable cage assembly. Spring members bias the piston assembly and the cage assembly to a closed position to prevent fluid flow from the fluid inlet to the bypass fluid outlet when the delivery pressure is between an upper first threshold pressure value and a lower second threshold pressure value. When the delivery system pressure exceeds the first threshold pressure value, the piston assembly is moved to a first open position that permits fluid flow to the bypass fluid outlet; and when the delivery system pressure is less than the second threshold pressure value, the piston assembly is moved to a second open position to permit fluid flow to the bypass fluid outlet.
    Type: Grant
    Filed: February 27, 2004
    Date of Patent: February 26, 2008
    Assignee: Corken, Inc.
    Inventors: Michael F. Hughes, Paul J. Lutes, Stephen Seymour
  • Patent number: 7165949
    Abstract: A rotary screw vacuum pump system includes a vacuum bypass system, which communicates with a first closed cell formed by the rotor system. An air bypass valve within an air communication conduit is controlled by a solenoid valve that operates in response to a pressure switch. The pressure switch is in communication with a vacuum pump suction conduit that draws suction for a suction system attached thereto. The solenoid valve is activated by the pressure switch at a vacuum level slightly below the point at which the undesirable cavitation noise generated at terminal vacuum condition begins.
    Type: Grant
    Filed: June 3, 2004
    Date of Patent: January 23, 2007
    Assignee: Hamilton Sundstrand Corporation
    Inventor: Mark A. Firnhaber
  • Patent number: 7125228
    Abstract: An oilless high pressure pump suitable for use in devices such as pressure washers and the like is described. The pump includes an eccentric assembly suitable for converting rotary motion of a rotating shaft to rectilinear motion. One or more straps couple the eccentric assembly to a piston assembly. The straps communicate the rectilinear motion of the eccentric assembly to the piston assembly, reciprocating the piston assembly to pump the liquid.
    Type: Grant
    Filed: March 14, 2005
    Date of Patent: October 24, 2006
    Assignee: Black & Decker Inc.
    Inventors: Shane Dexter, Mark W. Wood, Allen Palmer, William B. Daniel
  • Patent number: 6866486
    Abstract: An oilless high pressure pump suitable for use in devices such as pressure washers and the like is described. The pump includes an eccentric assembly suitable for converting rotary motion of a rotating shaft to rectilinear motion. One or more straps couple the eccentric assembly to a piston assembly. The straps communicate the rectilinear motion of the eccentric assembly to the piston assembly, reciprocating the piston assembly to pump the liquid.
    Type: Grant
    Filed: March 10, 2004
    Date of Patent: March 15, 2005
    Assignee: DeVilbiss Air Power Company
    Inventors: Shane Dexter, Mark W. Wood, Allen Palmer, William B. Daniel
  • Patent number: 6837692
    Abstract: A centrifugal pump with facilitated self-priming, which comprises a casing with a suction inlet and a discharge outlet and with an internal series of diffusers and impellers, which form a cylindrical assembly that forms, together with the casing, an annular interspace which is connected to the inside of the series of diffusers and impellers on the discharge side through corresponding openings and on the inlet side through a hole arranged perimetrically in the intake region; the hole is controlled, on the side of the interspace, by a normally-open flexible metallic laminar valve. A wall of the pump struck by the fluid exiting from the interspace through the controlled hole is shaped so as to have a double symmetrical channel for imparting to the fluid a double vortex before passing through the first impeller.
    Type: Grant
    Filed: January 3, 2002
    Date of Patent: January 4, 2005
    Assignee: DAB Pumps S.p.A.
    Inventor: Davide Martinello
  • Patent number: 6823686
    Abstract: A pressure equalization method and system is provided for starting a compressor while maintaining the condenser at a high pressure and includes a valve and a bleed port. The compressor has a compressor inlet for receiving a fluid at a first pressure and a compressor outlet for discharging the fluid at a second pressure, and is operable to compress the fluid from the first pressure to the second pressure. The valve is proximate to and in fluid communication with the compressor outlet and is movable to an open position when the compressor is operating to permit the fluid at the second pressure to flow through the valve and is movable to a closed position when the compressor stops operating to prevent backflow of the fluid at the second pressure through the valve toward the compressor inlet. The bleed port is upstream of the valve and in fluid communication with the compressor inlet to equalize the pressure of the fluid contained in the compressor when the compressor stops operating.
    Type: Grant
    Filed: July 12, 2002
    Date of Patent: November 30, 2004
    Assignee: Bristol Compressors, Inc.
    Inventors: Eugene Chumley, Larry G. Pippin, Pantelis V. Hatzikazakis, William Z. Sun, Timothy M. Wampler, Charles E. Zimmerman, Rongchang Xin, David T. Monk
  • Publication number: 20040175278
    Abstract: An oilless high pressure pump suitable for use in devices such as pressure washers and the like is described. The pump includes an eccentric assembly suitable for converting rotary motion of a rotating shaft to rectilinear motion. One or more straps couple the eccentric assembly to a piston assembly. The straps communicate the rectilinear motion of the eccentric assembly to the piston assembly, reciprocating the piston assembly to pump the liquid.
    Type: Application
    Filed: March 10, 2004
    Publication date: September 9, 2004
    Inventors: Shane Dexter, Mark W. Wood, Allen Palmer, William B. Daniel
  • Patent number: 6779987
    Abstract: An oilless high pressure pump suitable for use in devices such as pressure washers and the like is described. The pump includes an eccentric assembly suitable for converting rotary motion of a rotating shaft to rectilinear motion. One or more straps couple the eccentric assembly to a piston assembly. The straps communicate the rectilinear motion of the eccentric assembly to the piston assembly, reciprocating the piston assembly to pump the liquid.
    Type: Grant
    Filed: March 1, 2002
    Date of Patent: August 24, 2004
    Assignee: DeVilbiss Air Power Company
    Inventors: Shane Dexter, Allen Palmer, Mark W. Wood, William B. Daniel
  • Patent number: 6769880
    Abstract: A pressure blowdown system for an oil-injected rotary screw air compressor having an output conduit mounted to a high pressure side of the compressor and having a feedback conduit mounted to an intake side of the compressor, includes a rigid container having a gas reservoir therein, the container having a rigid plate mounted thereon closing the reservoir, a rigid valve housing mounted to the plate, the housing defining a valve spool cavity and having a pressure blowdown vent, the cavity having first and second opposite ends, a valve spool slidably snugly mounted in the cavity for sliding translation between the first and second ends of the cavity, respectively into first and second positions in the cavity. Resilient means are mounted in the cavity for resiliently urging the valve spool from the first end towards the second end of the cavity. A first gas passageway in the plate provides unobstructed fluid communication between the first end of the cavity and the feedback conduit of the compressor.
    Type: Grant
    Filed: September 19, 2002
    Date of Patent: August 3, 2004
    Assignee: Mangonel Corporation
    Inventors: James Victor Hogan, Alan Michael Augustynek
  • Patent number: 6715999
    Abstract: In a compressor at least one bypass valve is arranged in a low-pressure zone inside a casing of the compressor. The bypass valve defines a chamber connected by a first duct to at least one compression pocket situated in the peripheral zone of the compression stage and by a second duct to the low-pressure zone, the two ducts opening near one another so that they can be shut off by a shutter which can move in the chamber, being guided by the walls that delimit this chamber, a third duct intended for conveying a shutter-control fluid opening into the lower wall of the chamber of the valve. The shutter is opened by gravity when no control fluid is applied.
    Type: Grant
    Filed: September 20, 2002
    Date of Patent: April 6, 2004
    Assignee: Danfoss Maneurop S.A.
    Inventors: Christophe Ancel, Yves Rosson, Jean De Bernardi
  • Patent number: 6698446
    Abstract: A check valve with an elongated body and a hole extending from an inlet end to an outlet end. A piston assembly is mounted within the body and can include a piston, a check valve seal and a piston spring. The piston spring biases the piston to a first piston location preventing air from flowing from the inlet toward the outlet end. The check valve seal can be positioned on the piston assembly to seal against either a check valve seat or the inside diameter of the hole to restrict air flow when the piston is in the first piston location. Movement of the piston to a downstream piston location can remove the check valve seal from the check valve seat and/or from the inside diameter of the hole, allowing air to flow from the inlet end toward to outlet end.
    Type: Grant
    Filed: July 12, 2002
    Date of Patent: March 2, 2004
    Assignee: R. Conrader Company
    Inventor: James P. Cornwell
  • Patent number: 6679683
    Abstract: The present invention provides the art with a scroll machine which has a plurality of built-in volume ratios along with their respective design pressure ratios. The incorporation of more than one built-in volume ratio allows a single compressor to be optimized for more than one operating condition. The operating envelope for the compressor will determine which of the various built-in volume ratios is going to be selected. Each volume ratio includes a discharge passage extending between one of the pockets of the scroll machine and the discharge chamber. All but the highest volume ration utilize a valve controlling the flow through the discharge passage.
    Type: Grant
    Filed: July 15, 2002
    Date of Patent: January 20, 2004
    Assignee: Copeland Corporation
    Inventors: Stephen M. Seibel, Michael M. Perevozchikov, Norman Beck
  • Publication number: 20040007261
    Abstract: A check valve with an elongated body and a hole extending from an inlet end to an outlet end. A piston assembly is mounted within the body and can include a piston, a check valve seal and a piston spring. The piston spring biases the piston to a first piston location preventing air from flowing from the inlet toward the outlet end. The check valve seal can be positioned on the piston assembly to seal against either a check valve seat or the inside diameter of the hole to restrict air flow when the piston is in the first piston location. Movement of the piston to a downstream piston location can remove the check valve seal from the check valve seat and/or from the inside diameter of the hole, allowing air to flow from the inlet end toward to outlet end.
    Type: Application
    Filed: July 12, 2002
    Publication date: January 15, 2004
    Inventor: James P. Cornwell
  • Patent number: 6663358
    Abstract: A compressor for providing automatic capacity modulation is disclosed. The compressor comprises a compression chamber, a compressing member, a reexpansion area, a flow passage, a valve member, and a biasing member. The flow passage is in fluid communication with the compression chamber and the reexpansion area. In one position, the valve member permits flow through the flow passage and in a second position it prevents flow. The valve member is subjected to a first operating condition of fluid on one side and a second operating condition of the fluid on the other side. The biasing member exerts a biasing force on the valve member. When the first operating condition reaches a predetermined point relative to the second operating condition, the valve member moves and effects a change in the capacity of the compressor.
    Type: Grant
    Filed: January 29, 2002
    Date of Patent: December 16, 2003
    Assignee: Bristol Compressors, Inc.
    Inventors: Joe Frank Loprete, David Turner Monk, Eugene Karl Chumley, Tyrone Scott Simerly, John K. Narney, II, Mark Randall Trent, Panteleimon V. Hatzikazakis, Tom Evans Goodnight, Rongchang Xin, Robert Desmond Douglas
  • Publication number: 20030215336
    Abstract: A multi-stage screw compressor unit and method of operation thereof are provided, which enable operation with high efficiency always even when suction or discharge pressure fluctuates widely, the compressor unit comprising a combination of a compression stage provided with an unloader slide valve and that provided with an internal volume ratio control valve, or a combination of compression stage provided with an internal volume control valve and that of fixed internal volume ratio, or a combination of compression stages each provided with an internal volume control valve.
    Type: Application
    Filed: March 12, 2003
    Publication date: November 20, 2003
    Applicant: Mayekawa Mfg. Co., Ltd.
    Inventors: Toshiro Hattori, Katsuyuki Takahashi, Kiyoshi Tanaka
  • Patent number: 6641372
    Abstract: A hydraulic pump includes a housing, a primary discharge outlet, an auxiliary discharge outlet, and a flow control valve for controlling fluid flow from the primary and auxiliary discharge outlets. A first fluid passageway within the housing passes fluid from a first discharge port to the primary discharge outlet, and a second fluid passageway within the housing passes fluid from a second discharge port to a common port of the flow control valve. In a first position, the valve directs fluid from the second discharge port to the primary discharge outlet. In a second position, the valve diverts fluid from the second discharge port to the auxiliary discharge outlet. The valve may be positioned in response to such operating conditions as excessive pressure differential between the high and low-pressure sides, excessive pump rate of rotation (RPM), or excessive rate of fluid flow, among others.
    Type: Grant
    Filed: August 26, 2002
    Date of Patent: November 4, 2003
    Assignee: Delphi Technologies, Inc.
    Inventors: Thomas C. Rytlewski, David R. Aden, James L. Davison
  • Patent number: 6619934
    Abstract: Several transmission embodiments selectively communicate rotary drive to an orbiting scroll to achieve capacity modulation. In these embodiments, when the motor is driven in a first direction, the orbiting scroll is driven at a rate which is equal to the motor speed. However, if the motor is driven in a reverse direction, the orbit rate of the orbiting scroll is reduced. The transmission ensures that the orbiting scroll member itself is driven in the proper forward direction regardless of whether the motor is being driven in forward or reverse.
    Type: Grant
    Filed: August 22, 2002
    Date of Patent: September 16, 2003
    Assignee: Scroll Technologies
    Inventors: Joseph F. Loprete, John R. Williams, Gene Michael Fields, Joe T. Hill
  • Patent number: 6584791
    Abstract: A pressure equalization method and system is provided for starting a compressor while maintaining the compressor at a high pressure and comprises a valve and a bleed port. The compressor has a compressor inlet for receiving a fluid at a first pressure and a compressor outlet for discharging the fluid at a second pressure, and is operable to compress the fluid from the first pressure to the second pressure. The valve is proximate to and in fluid communication with the compressor outlet and is movable to an open position when the compressor is operating to allow the fluid at the second pressure to flow through the valve and is movable to a closed position when the compressor stops operating to prevent backflow of the fluid at the second pressure through the valve toward the compressor inlet. The bleed port is upstream of the valve and in fluid communication with the compressor inlet to equalize the pressure of the fluid contained in the compressor when the compressor stops operating.
    Type: Grant
    Filed: April 5, 2001
    Date of Patent: July 1, 2003
    Assignee: Bristol Compressors, Inc.
    Inventors: David T. Monk, Larry G. Pippin, Pantelis V. Hatzikazakis, William Z. Sun, Timothy M. Wampler, Charles E. Zimmerman
  • Publication number: 20030108437
    Abstract: A centrifugal pump (10) with facilitated self-priming, which comprises a casing (11) with a suction inlet (12) and a discharge outlet and with an internal series (14) of diffusers and impellers, which form a cylindrical assembly that forms, together with the casing (11), an annular interspace which is connected to the inside of the series (14) of diffusers and impellers on the discharge side through corresponding openings (13a) and on the inlet side through a hole (18) arranged perimetrically in the intake region; the hole (18) is controlled, on the side of the interspace (16), by a normally-open flexible metallic laminar valve (19). A wall (20) of the pump struck by the fluid exiting from the interspace (16) through the controlled hole (18) is shaped so as to have a double symmetrical channel (21) for imparting to the fluid a double vortex before passing through the first impeller.
    Type: Application
    Filed: September 13, 2002
    Publication date: June 12, 2003
    Inventor: Davide Martinello
  • Patent number: 6551069
    Abstract: A compressor with a capacity modulation system includes a compression chamber, a rotatable shaft within the compression chamber, and a roller mounted on the shaft in contact with a wall of the compression chamber. A suction channel is in fluid communication with the compression chamber for providing fluid at a suction pressure and a discharge channel is in fluid communication with the compression chamber for removing fluid at a discharge pressure. A re-expansion channel adjacent to the compression chamber has a first end forming a re-expansion port in the wall of the compression chamber. A re-expansion chamber is connected to the re-expansion channel. A valve disposed in the re-expansion channel is movable between a first position, in which the valve allows fluid communication between the compression chamber and the re-expansion chamber, and a second position, in which the valve prevents fluid communication between the compression chamber and re-expansion chamber.
    Type: Grant
    Filed: June 11, 2001
    Date of Patent: April 22, 2003
    Assignee: Bristol Compressors, Inc.
    Inventors: John K. Narney, II, David T. Monk, Joseph F. Loprete
  • Publication number: 20020122730
    Abstract: An oilless high pressure pump suitable for use in devices such as pressure washers and the like is described. The pump includes an eccentric assembly suitable for converting rotary motion of a rotating shaft to rectilinear motion. One or more straps couple the eccentric assembly to a piston assembly. The straps communicate the rectilinear motion of the eccentric assembly to the piston assembly, reciprocating the piston assembly to pump the liquid.
    Type: Application
    Filed: March 1, 2002
    Publication date: September 5, 2002
    Inventors: Shane Dexter, Allen Palmer, Mark W. Wood, William B. Daniel
  • Patent number: 6431844
    Abstract: A high pressure pump suitable for use in devices such as pressure washers or the like is disclosed wherein the pump's head assembly includes an integral start valve for allowing the fluid through the head assembly so the engine may be more easily started. When the pump reaches a predetermined rate of flow of the fluid, the start valve assembly closes to circulate the fluid through said pump assembly.
    Type: Grant
    Filed: August 14, 2000
    Date of Patent: August 13, 2002
    Assignee: DeVilbiss Air Power Company
    Inventors: Shane Dexter, Allen Palmer, Mark Wood
  • Patent number: 6296456
    Abstract: A positive displacement pump system has first and second delivery passages for pumped fluid and a main delivery passage receiving flow from the first delivery passage and, via a non return valve, from the second delivery passage. A control valve is provided to apportion flow from the first and second delivery passage to an overspill port. A pressure sensitive control orifice is provided in the main discharge passage to receive the combined flows and the control orifice is of variable size.
    Type: Grant
    Filed: December 10, 1999
    Date of Patent: October 2, 2001
    Assignee: Dana Automotive Limited
    Inventors: Alec Thornelow, Derek Keith Brighton, Matthew Williamson
  • Publication number: 20010002239
    Abstract: A control for a refrigeration system serviced by a special pulse width modulated compressor coupled to a condenser and evaporator. The system can be of the distributed type wherein the condenser and compressor may be coupled to service a group of adjacent refrigeration cases, wherein each case would have its own evaporator. A controller is coupled to a load sensor for producing a variable duty cycle control signal in which the duty cycle is a function of demand for cooling. Moreover, fuzzy logic techniques may be utilized in order to provide self adaptive tuning control for the system.
    Type: Application
    Filed: January 16, 2001
    Publication date: May 31, 2001
    Applicant: Copeland Corporation
    Inventors: Hung M. Pham, Abtar Singh, Jean-Luc M. Caillat, Mark Bass
  • Patent number: 6238191
    Abstract: The apparatus for supplying fuel includes a fuel tank and a fuel feed unit in the fuel tank. The fuel feed unit has a main housing, a suction cover arranged in a bottom part of the main housing, a fuel pump and a degassing valve arranged in the suction cover for degassing the fuel pump. The fuel pump itself includes an impeller housing with a circular passage for fuel flow and an electric-motor-driven impeller. The impeller housing is arranged in the main housing and next to the suction cover and it is provided with a degassing passage connecting the circular passage with the degassing valve. To improve starting behavior the fuel feed unit has a degassing valve in the suction cover, which is connected with the circular passage of the impeller housing by a degassing passage. The degassing valve opens to the fuel tank when pressure in the degassing passage exceeds a predetermined value for degassing the fuel pump.
    Type: Grant
    Filed: July 15, 1999
    Date of Patent: May 29, 2001
    Assignee: Robert Bosch GmbH
    Inventors: Willi Strohl, Dietmar Schmieder, Albert Gerhard, Jochen Rose, Erich Eiler
  • Patent number: 6213731
    Abstract: A scroll compressor includes a capacity modulation system. The capacity modulation system has a piston that is connected to the non-orbiting scroll that disengages the non-orbiting scroll from the orbiting scroll when a pressure chamber is placed in communication with the suction chamber of the compressor. The non-orbiting scroll member moves into engagement with the orbiting scroll when the chamber is placed in communication with the discharge chamber. The engagement between the two scrolls is broken when the pressure chamber is placed in communication with fluid from the suction chamber. A solenoid valve controls the communication between the pressure chamber and the suction chamber. By operating the valve in a pulsed width modulated mode, the capacity of the compressor can be infinitely varied between zero and one hundred percent.
    Type: Grant
    Filed: September 21, 1999
    Date of Patent: April 10, 2001
    Assignee: Copeland Corporation
    Inventors: Roy J. Doepker, Mark Bass, James F. Fogt, Jeffrey Andrew Huddleston
  • Patent number: 6176685
    Abstract: In a scroll compressor provided with a fixed scroll member (4) and a movable scroll member (3) which define a plurality of compression spaces (6) therebetween in cooperation with each other, a hole (32) is formed to the fixed scroll member to be communicable with adjacent ones of the compression spaces. The adjacent compression spaces are different from each other in pressure when the scroll compressor is driven. A piston valve (33) is disposed in the hole and controls communication between the adjacent compression space through the hole. The compression spaces are movable with volumes reduced by movement of the movable scroll member.
    Type: Grant
    Filed: January 26, 1999
    Date of Patent: January 23, 2001
    Assignee: Sanden Corporation
    Inventors: Jiro Iizuka, Akiyoshi Higashiyama
  • Patent number: 6171071
    Abstract: A water pump includes a housing having a water inlet, a water outlet, an exit and a mouth. A circulating water passage couples the exit to the mouth of the housing. A pump may pump water from the exit to the mouth of the housing via the circulating water passage. The housing includes two ducts communicating with each other and communicating with the mouth, and the water inlet and the water outlet respectively. Two plugs are slidably disposed in the ducts for switching water to circulate through the exit and the circulating water passage when the water outlet is closed.
    Type: Grant
    Filed: August 16, 1999
    Date of Patent: January 9, 2001
    Inventors: Tsann Ruey Tzeng, Sheng Jong Tzeng
  • Patent number: 6168390
    Abstract: A dosing pump for dosed liquid conveyance that includes a suction valve built into a suction tube coming out of a suction container, a pump chamber having a displacement volume that can be modified by means of a pumping member, a pressure valve leading to a dosing tube, a deaeration device arranged on the top end of the tube and comprising a return valve and a flow-actuated deaeration and bypass valve built into a deaeration valve having response characteristics dependent upon the state of aggregation of the liquid contained therein. The flow-activated deaeration and bypass valve is open when idle, only closing when pressure is raised in the presence of liquid in the valve, and is provided with a membrane. Faulty pump operation is substantially reduced when the membrane is connected to a remote closing member which closes the deaeration tube when the membrane is moved. A return valve is arranged between the membrane and the closing member.
    Type: Grant
    Filed: October 22, 1999
    Date of Patent: January 2, 2001
    Assignee: Henkel Kommanditgesellschaft Auf Aktien
    Inventors: Herbert Hunklinger, Klaus Rutz
  • Patent number: RE40257
    Abstract: A scroll compressor includes a capacity modulation system. The capacity modulation system has a piston that is connected to the non-orbiting scroll that disengages the non-orbiting scroll from the orbiting scroll when a pressure chamber is placed in communication with the suction chamber of the compressor. The non-orbiting scroll member moves into engagement with the orbiting scroll when the chamber is placed in communication with the discharge chamber. The engagement between the two scrolls is broken when the pressure chamber is placed in communication with fluid from the suction chamber. A solenoid valve controls the communication between the pressure chamber and the suction chamber. By operating the valve in a pulsed width modulated mode, the capacity of the compressor can be infinitely varied between zero and one hundred percent.
    Type: Grant
    Filed: September 29, 2003
    Date of Patent: April 22, 2008
    Assignee: Emerson Climate Technologies, Inc.
    Inventors: Roy J. Doepker, Mark Bass, James F. Fogt, Jeffrey A. Huddleston