Reverse Flow With Unidirectional Drive Or Unidirectional Flow With Reverse Drive Patents (Class 417/315)
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Patent number: 11739739Abstract: Non-limiting exemplary embodiments of a pumping system and methods for operating the pumping system in a region of high pressure or a region of high flow are disclosed. The pumping system includes a piston disposed within a piston cylinder, a drive shaft, an eccentric coupled to the drive shaft, a connecting arm having opposing first and second ends, and a controller for controlling the rotation of the drive shaft such that the piston oscillates within a region of high pressure or a region of high flow.Type: GrantFiled: September 15, 2022Date of Patent: August 29, 2023Assignee: Graco Minnesota Inc.Inventor: Bryan K. Colby
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Patent number: 11460026Abstract: A compressor unit including a screw compressor having a compressor housing that has a screw rotor chamber arranged in the compressor housing, two screw rotors that are arranged in the screw rotor chamber and are mounted on the compressor housing to be rotatable about a respective screw rotor axis, and at least one control slider, which is arranged in a slider channel of the compressor housing, is adjacent to both screw rotors and is movable in a direction of displacement parallel to the screw rotor axes and takes a form such that it affects the final volume and/or the initial volume, wherein there is provided on the screw compressor a compressor operational control unit that takes a form such that it performs a compressor operating function that assists at least one operation of the compressor unit.Type: GrantFiled: October 4, 2018Date of Patent: October 4, 2022Assignee: BITZER Kuehlmaschinenbau GmbHInventors: Tihomir Mikulic, Roni Loerch, Klaus Feller
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Patent number: 10883744Abstract: A screw compressor is disclosed. The screw compressor includes a suction inlet that receives a working fluid to be compressed; a compression mechanism fluidly connected to the suction inlet that compresses the working fluid; a discharge outlet fluidly connected to the compression mechanism that outputs the working fluid following compression by the compression mechanism; wherein the compression mechanism fluidly communicates with one or more outlets disposed at an intermediate location between the suction inlet and the discharge outlet, the one or more outlets being selectively fluidly connectable to the discharge outlet such that the working fluid can be provided from the one or more outlets to the discharge outlet.Type: GrantFiled: June 12, 2018Date of Patent: January 5, 2021Assignee: TRANE INTERNATIONAL INC.Inventors: Jay H. Johnson, Robert S. Bakkestuen
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Patent number: 10786089Abstract: A pump assembly is provided for use with an inflatable product. The inflatable product has a chamber having an air inlet and an air outlet. The pump assembly has a pump unit that is positioned inside the chamber for inflating and deflating the chamber, the pump unit having a motor that is operatively coupled to a first blower and a second blower, with the first blower is fluidly coupled to the air inlet and the second blower is fluidly coupled to the air outlet. The chamber is inflated by intake of air through the air inlet to the first blower and then into the chamber, and the chamber is deflated by drawing air from the chamber to the second blower and then out of the chamber through the air outlet.Type: GrantFiled: August 7, 2018Date of Patent: September 29, 2020Assignee: Sun Pleasure Company LimitedInventors: Vincent W. S. Lau, Shouguo Long
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Patent number: 10780566Abstract: A pneumatic tool includes a main body unit, a control valve unit, a switch unit and a trigger unit. The main body unit has a flow path for guiding inflow of air. The control valve unit removably blocks the flow path. The switch unit includes a sleeve member movable between an open position where the control valve unit is driven to unblock the flow path, and a block position where the control valve unit is driven to block the flow path. The trigger unit includes a trigger member operable to move the sleeve member between the open position and the block position.Type: GrantFiled: August 23, 2016Date of Patent: September 22, 2020Assignee: Basso Industry Corp.Inventor: San-Yih Su
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Patent number: 10697457Abstract: A device for compressing and expanding gases, wherein the device comprises an apparatus that can be driven in two directions, whereby in one direction the apparatus operates to compress a gas and in the other direction the apparatus operates to expand a gas.Type: GrantFiled: May 11, 2015Date of Patent: June 30, 2020Assignee: ATLAS COPCO AIRPOWER, NAAMLOZE VENNOOTSCHAPInventors: Kris Van Campfort, Kristof Pascal Hubin
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Patent number: 10335310Abstract: Apparatuses and methods for snore disrupting and prevention are disclosed. One apparatus includes: an inflatable bladder assembly configured to inflate and deflate to move a head of a user; a conduit connected to the bladder assembly and configured to extend at a distance from the bladder assembly; an air inflator connected to the conduit for inflating the bladder assembly through the conduit, the air inflator being at the distance from the bladder assembly when in use to minimize noise, radiation or discomfort for the user a controller in communication with the air inflator to actuate the air inflator to inflate the bladder assembly; and an audio processor in communication with the controller, the audio processor being configured to detect sound waves and transmit control commands to the controller to trigger cyclical actuation of the air inflator upon a trigger event.Type: GrantFiled: March 11, 2016Date of Patent: July 2, 2019Inventors: Aliasghar Hariri, Sahar Hariri
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Patent number: 9845805Abstract: Dual operation centrifugal fan apparatus and methods of operating same that may be used, for example, to cool the internal heat-generating components of an information handling system or other device. The dual operation centrifugal fan apparatus may be implemented in one embodiment as a self-cleaning blower apparatus that is operated in a first normal cooling direction to dissipate heat from internal components of an information handling system, and operated in second cleaning direction to reverse airflow and expel accumulated dust from the interior of the information handling system.Type: GrantFiled: July 29, 2010Date of Patent: December 19, 2017Assignee: Dell Products, L.P.Inventors: Gurmeet Bhutani, Cheng-Kuo Wang, Hung-Pin Chien, Li-Chung Liu, Tien Hsiang Wu
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Patent number: 9169840Abstract: A screw compressor includes a valve hole formed at a discharge side end surface of a discharge casing and at a position opening to a compression work chamber; a bypass flow path having the valve hole and a discharge chamber communicate with each other; and a valve body arranged in the valve hole. The screw compressor also includes cylinder chambers provided on a rear surface side of the valve body; a piston reciprocally moving in the cylinder chambers; a rod connecting the piston and the valve body; communication paths for introducing a fluid on a discharge side into the cylinder chamber on a side opposite to a valve body side of the piston and on the valve body side; a pressure discharge path; a plurality of valve means; and a controller controlling the plurality of valves means.Type: GrantFiled: January 10, 2012Date of Patent: October 27, 2015Assignee: Hitachi Appliances, Inc.Inventors: Ryuichiro Yonemoto, Eisuke Kato, Masayuki Urashin, Shinichiro Yamada
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Patent number: 9151283Abstract: An electrochemical motive device is described having an electrochemical cell and at least one device configured produce motion as a function of electrochemical gas produced by the electrochemical cell. One example of an electrochemical motive device is a pump having one pump chamber, and pump member that forces a pumping fluid through the chamber. An electrochemical cell provides for a transfer of gas from the anode to the cathode. A control portion is described for taking input from the electrochemical pump and controlling the voltage and current to the electrochemical cell. In one embodiment, multiple pumping chambers are configured, and in one embodiment two pumping chambers are connected. It is further described that the control portion may automatically adjust parameters as a function of inputs, including user interface inputs.Type: GrantFiled: August 6, 2012Date of Patent: October 6, 2015Assignee: Xergy LTDInventors: Bamdad Bahar, William Paul Parmelee, Steve Naugler
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Digester assembly for providing renewable resources and associated systems, apparatuses, and methods
Patent number: 9127244Abstract: A renewable energy system includes a digester assembly having an outer tube with an input region and a digestion region. The input region extends above grade and is configured to receive liquid waste. At least a portion of the digestion region is positioned below grade and configured to receive the liquid waste and to anaerobically digest the liquid waste with microorganisms to supply renewable byproducts, such as methane, hydrogen, carbon dioxide, and/or carbon dioxide-rich water. The digester assembly can include two or more deformable tubes that are configured to move liquid through the outer tube by alternatingly compressing one another. In one embodiment, the deformable tubes are configured to replenish waste liquid and to deliver liquid byproducts. In another embodiment, the deformable tubes are configured to exhaust air, such as for delivery of gas byproducts and fostering an anaerobic environment.Type: GrantFiled: March 14, 2013Date of Patent: September 8, 2015Assignee: McAlister Technologies, LLCInventor: Roy Edward McAlister -
Patent number: 8959899Abstract: SCR system for treating the exhaust gases of an internal combustion engine, this system comprising a line for feeding a urea solution into the exhaust gases and a pump capable both of feeding the urea solution into the exhaust gases and of purging at least one part of the line by sucking a gas therethrough by means of a suction device, this system also comprising a control unit capable of activating and/or deactivating the operation of the pump and that of the suction device in a sequential manner in the course of one and the same purge procedure.Type: GrantFiled: January 14, 2013Date of Patent: February 24, 2015Assignee: Inergy Automotive Systems ResearchInventors: Jean-Claude Habumuremyi, Frederic Peucat, Nicolas Duret, Stephane Leonard, Guillaume Zeller
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Patent number: 8944779Abstract: The invention relates to a rotary lobe pump for conveying solids-laden fluids engendered in agriculture, in which the conveyed fluid volume flow adapts itself to different operating modes. For improved self-priming, the rotary lobe pump is designed for vertical mounting of the rotary lobes, wherein an angular gear is provided. The rotary lobes are mounted in a topside or underside cover, wherein the axes of the rotary lobes are vertically oriented. Using one of the covers, the rotary lobes can be vertically removed and maintained without having to dismantle other pump components from the pump housing. The rotary lobes can also be removed together with the angular gear as an integral pump component using one of the covers.Type: GrantFiled: June 30, 2010Date of Patent: February 3, 2015Assignee: Hugo Vogelsang Maschinenbau GmbHInventors: Paul Krampe, Heinrich Deyen
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Patent number: 8894385Abstract: A bi-directional pump comprises a pump housing, and the pump housing comprises a pump outlet. A fluid pressurizer is positioned in the pump housing and configured to provide fluid flow selectively in a first direction and a second direction. A first passage and a second passage are positioned in the pump housing. A junction is fluidly positioned, in the pump housing, connecting the first and second passages to the pump outlet. A flow controller is positioned in the pump housing to move relative thereto, between a first position, placing the first passage, in fluid communication, with the pump outlet via the junction when the fluid pressurizer provides fluid flow in the first direction, and a second position placing the second passage, in fluid communication with the pump outlet, via the junction when the fluid pressurizer provides fluid flow in the second direction.Type: GrantFiled: November 17, 2011Date of Patent: November 25, 2014Assignee: Deere & CompanyInventors: Ryan P. Goss, Lourens M. Jacobs
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Publication number: 20140161632Abstract: An example method of using a servomechanism can include controlling a reversible positive displacement pump that is located in a first chamber of a housing to push a fluid, via a first passage in the housing, against one side of a vane that is rotably disposed in a second chamber of a housing to rotate an output shaft that is coupled to the vane and controlling the reversible positive displacement pump to push a fluid, via a second passage in the housing, against another side of a vane to reverse rotation of the output shaft.Type: ApplicationFiled: December 11, 2012Publication date: June 12, 2014Inventor: Alan G. Cocconi
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Patent number: 8641391Abstract: A built-in electric air pump mounted on an inflatable bed by heat binding or adhesion is provided, and includes a pump housing; an air duct conversion mechanism mounted in the pump housing; a cover assembly covering the pump housing; a switch assembly connected with the air duct conversion mechanism; an air valve assembly disposed on the bottom of the pump housing; and a power source device connected with the switch assembly and powering the air pump. The air pump receives power from combinations of power sources in four different modes, namely, dry batteries, a rechargeable battery pack assembly, a vehicle-mounted power source and an AC adapter which match one another, to drive the pump, thereby forming multiple power source configurations to drive the same set of air pump and enable the same inflatable bed to be used indoors as well as outdoors at any time.Type: GrantFiled: December 28, 2010Date of Patent: February 4, 2014Assignee: Foshan Shunde Xinshengyuan Electrical Appliances Co., LtdInventor: Erjian Pan
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Publication number: 20130336815Abstract: A hydraulic pump rotates in both directions of rotation, and includes a casing, a common drive shaft mounted so as to be able to rotate relative to the casing, two swashplates borne by the common drive shaft, these two swashplates being symmetric and opposite each other and each including one supply crescent, a respective hollow piston pressing against each swashplate via the intermediary of a slipper shoe and designed to slide in a respective cylinder connected to the casing, the crescent of the swashplate being in each case arranged so as to pass over the hollow piston during a suction phase of the hollow piston, each cylinder being fitted with a check valve on the discharge side, such that only one of the two swashplates provides an output when the drive shaft rotates in one direction, the other swashplate providing an output when the shaft rotates in the other direction.Type: ApplicationFiled: May 30, 2013Publication date: December 19, 2013Inventor: Louis-Claude POREL
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Patent number: 8235684Abstract: An air pump includes a sliding member disposed movably a housing and cooperating with the housing and a partition casing in the housing to define first and second chambers thereamong. The air pump is operable between a deflation state, where air from an inflatable product connected to an air nozzle on the housing into an air impeller chamber in the partition casing through the first chamber and an air inlet in the partition casing is driven by rotation of an air impeller to flow outside the air pump through an air outlet in the partition casing, the second chamber and an first vent unit in housing, and an inflation state, where air flowing from the outside into the air impeller chamber through a second vent unit in the sliding member, an air pipe of the sliding member and the air inlet is driven to flow into the inflatable product through the air outlet, the first chamber and the air nozzle.Type: GrantFiled: June 4, 2010Date of Patent: August 7, 2012Inventors: Rong-Jyh Song, Tsung-Ping Yen
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Patent number: 8210834Abstract: An air pump for an inflatable article has a housing, and a blower, a switch assembly, an air valve and a fan guard mounted in the housing. The switch assembly has a slider and a driving device sliding the slider and the air valve to switch operating modes of the air pump. Thus, the air pump inflates or deflates the inflatable article or maintains or fine-tunes the air pressure inside the inflatable article. Therefore, the first and second openings of the housing are disposed on the housing for connection to different kinds of inflatable articles and the airflow directly flows through the air pump so inflating and deflating the inflatable article is fast.Type: GrantFiled: July 23, 2009Date of Patent: July 3, 2012Assignee: Dongguan Tiger Point, Metal & Plastic Products Co., Ltd.Inventor: Chun-Chung Tsai
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Publication number: 20120085119Abstract: A device that enhances compressor efficiency by reducing pressure losses in a discharge muffler space into which is discharged a refrigerant compressed by a compression unit. A low-stage discharge muffler space is formed in the shape of a ring around a drive shaft. In the low-stage discharge muffler space, a communication port flow guide is provided so as to cover a predetermined area of an opening of a communication port from a side of a flow path in a reverse direction out of two flow paths in different directions around the drive shaft from a discharge port through which is discharged the refrigerant compressed by a low-stage compression unit to the communication port through which the refrigerant flows out. The communication port flow guide transforms a direction of a flow into a direction of a connecting flow path.Type: ApplicationFiled: May 24, 2010Publication date: April 12, 2012Applicant: MITSUBISHI ELECTRIC CORPORATIONInventors: Tetsuhide Yokoyama, Raito Kawamura, Kei Sasaki, Shin Sekiya, Taro Kato, Masao Tani, Atsuyoshi Fukaya, Takeshi Fushiki
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Patent number: 8052402Abstract: A hand operated pump for generating negative and positive air pressure. The pump includes a pump body having a pump cylinder and a piston mounted for reciprocation in the cylinder. A selector valve communicates with the cylinder and is moveable between a positive-pressure position and a negative-pressure position. The arrangement is such that operation of an actuator to move the piston through a power stroke when the selector valve is in its negative-pressure position causes the pump to generate negative pressure at an outlet of the pump, and operation of the actuator to move the piston through a power stroke when the selector valve is in its positive-pressure position causes the pump to generate positive pressure at the outlet of the pump. A method of operating such a pump is also disclosed.Type: GrantFiled: October 20, 2008Date of Patent: November 8, 2011Assignee: Lincoln Industrial CorporationInventors: Scott A. Sanders, Ayzik Grach
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Publication number: 20100247337Abstract: An air pump for an air mattress has a housing, a first air vent and a second air vent respectively mounted on a top and a bottom of the housing, a chamber, a blower and an air direction switcher mounted in the chamber, an actuating mechanism, and an air valve. A slider in the air direction switcher is moved by operating the actuating mechanism being a solenoid valve or a knob gear and a follower. The air valve is propped up by a sloping partition of the slider to open the second air vent. Given the structure of the air pump, the first and second air vents are flexibly arranged and can be directly aligned with each other. Therefore, the air path is shortened to inflate and deflate more rapidly and more efficiently.Type: ApplicationFiled: October 27, 2009Publication date: September 30, 2010Inventor: Chun-Chung Tsai
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Publication number: 20100014993Abstract: An inflatable product includes an inflatable body having an exterior wall defining at least one air chamber therein, at least one electrical air pump unit, an electrical switch connected electrically to the electrical air pump unit, and at least one controller. The controller is operable manually to activate the electrical air pump unit so as to perform a selected one of inflation, full deflation, and partial deflation of the air chamber in the inflatable body.Type: ApplicationFiled: July 16, 2008Publication date: January 21, 2010Inventors: Cheng-Chung WANG, Kenneth WANG
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Patent number: 7624896Abstract: The present invention relates to a device for supplying liquids comprising heating elements (3) heating up said liquids and an electric drive pumping group (101). The characteristic is that the pumping group (101) comprises an intake (102) and at least a first and second intake duct (8a-8b, 8c-8d, 8e-8f), and is further equipped with an impeller (11a, . . . , 11c), said first and second intake duct (8a-8b, 8c-8d, 8e-8f) being selectively activated according to the direction of rotation of said impeller (11a, . . . , 11c) of the pumping group (4a, . . . , 4c).Type: GrantFiled: November 15, 2002Date of Patent: December 1, 2009Assignee: Rhea Vendors S.p.A.Inventor: Andrea Doglioni Majer
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Patent number: 7588425Abstract: A reversible inflation system allowing a single pump to be used for both inflation and deflation of the air bladder. The present embodiment of the inflation system includes a motor and an impeller located within a housing having a diaphragm valve and a slide. Presently, the slide determines the direction of fluid flow through the housing, so that in a first position, the system causes fluid to flow into the bladder, and in a second position, the system causes fluid to flow out of the bladder.Type: GrantFiled: March 18, 2005Date of Patent: September 15, 2009Assignee: Aero Products International, Inc.Inventor: Tsai Chun Chung
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Patent number: 7536967Abstract: A marine water conversion apparatus capable of pumping ocean surface water several hundred feel below the surface to cause sufficient cooler water to rise to the surface to prevent formation of or to moderate hurricanes. The apparatus is remotely controlled and includes a propulsion system for moving it to a new location or in predetermined patterns through use of a global positioning system and computerized controls. Power for driving the pumps may be provided by a wind turbine driven electric generator at the upper end of an upper tube section pivotally connected to a float tank on a vertical axis.Type: GrantFiled: January 30, 2006Date of Patent: May 26, 2009Inventor: Gerald L. Barber
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Publication number: 20090047185Abstract: Systems and methods are provided for hydrogen generation utilizing two or more liquid fuel components, using a fuel delivery system comprising a single pump. Advantageously, a single reversible cycle pump is used to deliver two or more fuel components of a fuel mixture in desired proportions to a mixing zone, reaction zone, or reaction chamber of a hydrogen generation system, while reducing the number of active elements required for fuel delivery and flow control of multiple fuel components. Alternatively, a unidirectional single or duel feed pump co-operable with flow control means comprising a valve provides for delivering first and second fuel components in desired proportions. Control of the pump speed, and duty cycle of the pump in continuous or pulsed modes, provides for delivery of first and second fuel components in desired proportions, to control hydrogen generation, and to provide for dilution, mixing, and flush cycles, using a single pump.Type: ApplicationFiled: March 6, 2008Publication date: February 19, 2009Inventors: Keith A. Fennimore, John Spallone, Kevin W. McNamara
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Patent number: 7491037Abstract: A valving system for reversing flow in a compressing device. The reversible compressor includes a reversible drive motor for reversing a rotational direction of a rotor, a first and second port located in a left and right side of a stator, respectively, and a first and second manifold located on a right a left side of said reversible compressor, the first and said second manifold includes a corresponding first and second inlet valve moveable between an open and closed position. A valving system between said first and said second manifold switches one of the first and second inlet valve to an open position to open a corresponding first or the second port for directional flow corresponding to the rotational direction of the rotor. In a first embodiment the valving system is a pressure-actuated control element and in a second embodiment the valving system includes a solenoid.Type: GrantFiled: August 5, 2005Date of Patent: February 17, 2009Inventor: Thomas C. Edwards
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Publication number: 20080286129Abstract: The invention relates to a helical screw compressor which comprises two rotors (7, 9) having ribs (7?, 9) which extend a screw-like manner and grooves which engage with each other in a combing and sealing manner. The total number of ribs of both rotors is at least 14, and the height (H) of the grooves is no more than 0.15 times the external diameter (Da) of the rotor profile (7) and/or (9). The shaft journals of the rotors have a diameter which is not smaller than half of the external diameter (Da) of the rotor profile.Type: ApplicationFiled: June 9, 2006Publication date: November 20, 2008Applicant: GHH RAND SCHRAUBENKOMPRESSOREN GMBHInventors: Carsten Achtelik, Dieter Hütterman, Michael Besseling, Norbert Henning
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Publication number: 20080232982Abstract: A pump assembly for an inflatable structure comprises a blower unit disposed in a housing configured to move air in a single direction from an inlet in the housing to an outlet in the housing. A connector is in communication with the housing outlet. The connector is adapted to connect the pump assembly to an inflatable structure to allow inflation and deflation of the inflatable structure. A base is provided with first and second valve bodies positionable in the base for selective movement between inflate and deflate positions. The first valve body aligns the housing outlet in communication with the connector and the second valve body aligns the housing inlet with atmosphere in the inflate position. The second valve body aligns the connector in communication with the housing inlet and the first valve body aligns the housing outlet in communication with atmosphere in the deflate position.Type: ApplicationFiled: March 22, 2007Publication date: September 25, 2008Inventors: Dennis M. Boyd, John J. Shoenhair
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Patent number: 7418763Abstract: A hand-held portable vacuum having a filter indicator that is coupled to an outlet housing and in fluid communication with a portion of the outlet housing between a fan inlet and an intake. The filter indicator includes a pressure differential indicator that is configured to indicate a pressure differential between air in the portion of the outlet housing and atmospheric air pressure. The filter indicator is employed to indicate to the user of the hand-held vacuum that replacement and/or cleaning of the filter is required. The vacuum may also be used in a blower mode with a set of inflator nozzles to permit a user to inflate an article.Type: GrantFiled: February 25, 2004Date of Patent: September 2, 2008Assignee: Black & Decker Inc.Inventors: David M. Shaver, Jacob R. Prosper, Murray D. Hunter, Carolyn Martin, Patrick W. Mooney, Olga Makeev
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Patent number: 7313837Abstract: An inflatable product that includes a chamber and an electric air pump for inflating the chamber. The air pump has an air intake and an air outlet. The air intake is connected to the outside of the chamber and the air outlet is connected to the inside of the chamber when the air pump is moved to a first position. The air intake is connected to the inside of the chamber and the air outlet is connected to the outside of the chamber when the air pump is moved to a second position.Type: GrantFiled: September 5, 2006Date of Patent: January 1, 2008Assignee: Team Worldwide CorporationInventor: Cheng Chung Wang
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Patent number: 7120955Abstract: An inflatable product that includes a chamber and an electric air pump for inflating the chamber. The air pump has an air intake and an air outlet. The air intake is connected to the outside of the chamber and the air outlet is connected to the inside of the chamber when the air pump is moved to a first position. The air intake is connected to the inside of the chamber and the air outlet is connected to the outside of the chamber when the air pump is moved to a second position.Type: GrantFiled: October 30, 2003Date of Patent: October 17, 2006Assignee: Team Worldwide CorporationInventor: Cheng Chung Wang
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Patent number: 7040347Abstract: An inflatable product that includes an inflatable body, a switching pipe and a fan and motor. The switching pipe is switched between a first position and a second position. The fan and motor inflates the inflatable body when the switching pipe is switched to the first position. The fan and motor deflates the inflatable body via the switching pipe when the switching pipe is switched to the second position.Type: GrantFiled: April 1, 2005Date of Patent: May 9, 2006Assignee: Team Worldwide CorporationInventor: Cheng Chung Wang
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Patent number: 6953324Abstract: A stabilizing structure for a throw adjusting eccentric cam in a two-stage reciprocating compressor is provided. The compressor includes a block that has at least one cylinder with an associated compression chamber and piston, a crankshaft that includes an eccentric crankpin, and a reversible motor for rotating the crankshaft in a forward and a reverse direction. An eccentric, two position cam is rotatably mounted over the crankpin. The cam rotates to and operates at a first position relative to said crankpin when the motor is running in the forward direction and rotates to and operates at a second position relative to said crankpin when the motor is running in the reverse direction. The combined eccentricities of the crankpin and the cam cause the piston to have a first stroke when the motor operates in the forward direction and a second stroke when the motor operates in the reverse direction.Type: GrantFiled: May 31, 2000Date of Patent: October 11, 2005Assignee: Bristol Compressors, Inc.Inventors: Michael R. Young, Joseph F. Loprete, David T. Monk, Philip C. Wagner, Joe T. Hill, Robert B. Peters
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Patent number: 6592302Abstract: A blower unit is provided which is suitable for use in a pneumatic transmission system. The blower unit includes a housing having at least two inlet/outlet openings through which air can flow. Disposed within the housing are one or more blower motors, each blower motor for moving a volume of air from one of the at least two inlet/outlet openings to another. Also disposed within the housing are one or more bypass paths, each bypass path providing a route by which air can flow without flowing through an associated blower motor. A valve element is disposed within at least one of the bypass paths for substantially blocking air-flow through that bypass path when the associated blower motor is active.Type: GrantFiled: June 22, 2001Date of Patent: July 15, 2003Assignee: Comco SystemsInventor: Jack E. Balko
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Publication number: 20030021704Abstract: A pump has a pump assembly for pumping fluid. The pump assembly includes a fluid pressure changing mechanism in fluid communication with a valve plate which is in fluid communication with a port plate. A pair of flappers are interposed between and sealable with the valve plate and port plate. A head has a head port, and is in sealed engagement with the port plate, so that, in cooperation with the port plate and the valve plate, the flappers control fluid flowing through the head port and to and from the fluid pressure changing mechanism. Rotation of the port plate and valve plate relative to the head reverses flow of the fluid through the head port.Type: ApplicationFiled: August 5, 2002Publication date: January 30, 2003Inventors: Ross P Christiansen, Roy J Rozek
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Patent number: 6503068Abstract: In a variable capacity type pump, in the inner diameter of a cam ring, an inner diameter of a portion forming a middle section between a suction section and a discharge section in a pump chamber is constituted by a negative slope curve in which an end portion of a suction port is set to be a start point, and a complete round curve and a negative slope curve are connected by a high-order curve.Type: GrantFiled: October 19, 2001Date of Patent: January 7, 2003Assignee: Showa CorporationInventors: Eiichi Kojima, Chaojiu Wang, Kiyoshi Ando
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Patent number: 6422832Abstract: An air pump is capable of inflating and deflating an inflatable object and is formed of a main body having a cylinder duct, an air outlet and an air inlet in communication with the cylinder duct. The air in the cylinder duct is let out via the air outlet. The atmospheric air is let into the cylinder duct via the air inlet. Two check valves are disposed respectively at the air outlet and the air inlet. A compressing member has a piston which is movably disposed in the cylinder duct of the main body. An adjustment member is pivoted to the main body such that the adjustment member is displaced between a first position and a second position, so as to enable the adjustment member to be in communication with the air outlet or the air inlet to bring about the inflating function or the deflating function.Type: GrantFiled: March 27, 2001Date of Patent: July 23, 2002Inventor: Lo-Pin Wang
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Patent number: 6318974Abstract: The invention provides a compact oil pump for separate lubrication having no back gear with the rotation of an engine as a driving source even when the engine is reversely rotated.Type: GrantFiled: April 24, 2000Date of Patent: November 20, 2001Assignee: Mikuni Adec CorporationInventors: Hisanori Itoh, Kenichi Kubota
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Patent number: 6190137Abstract: A reciprocating piston compressor having at least one cylinder, a reciprocable piston disposed in the cylinder, a crankshaft rotatable in both a forward and a reverse direction, the crankshaft having a cylindrical eccentric portion, a latching member pivotally engaged with the crankshaft, a cam disposed about the crankshaft eccentric portion, the piston operatively connected to the cam, and a spring connected to one of the cam and the crankshaft, the position of the latching member influenced by the spring. The cam is rotatable about the crankshaft eccentric portion between a first cam position corresponding to a first piston stroke length during forward rotation of the crankshaft, and a second cam position corresponding to a second piston stroke length during reverse rotation of the crankshaft. In one of the first and second cam positions, the cam is rotatably locked to the crankshaft eccentric portion by the latching member.Type: GrantFiled: September 24, 1999Date of Patent: February 20, 2001Assignee: Tecumseh Products CompanyInventors: Elizabeth A. Robbins, Raymond D. Howell, Timothy Westcott
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Patent number: 6092993Abstract: A stabilizing structure for a throw adjusting eccentric cam in a two-stage reciprocating compressor is provided. The compressor includes a block that has at least one cylinder with an associated compression chamber and piston, a crankshaft that includes an eccentric crankpin, and a reversible motor for rotating the crankshaft in a forward and a reverse direction. An eccentric, two position cam is rotatably mounted over the crankpin. The cam rotates to and operates at a first position relative to said crankpin when the motor is running in the forward direction and rotates to and operates at a second position relative to said crankpin when the motor is running in the reverse direction. The combined eccentricities of the crankpin and the cam cause the piston to have a first stroke when the motor operates in the forward direction and a second stroke when the motor operates in the reverse direction.Type: GrantFiled: August 14, 1997Date of Patent: July 25, 2000Assignee: Bristol Compressors, Inc.Inventors: Michael R. Young, Joseph F. Loprete, David T. Monk, Philip C. Wagner, Joe T. Hill, Robert B. Peters
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Patent number: 5951261Abstract: A reciprocating piston compressor including at least one cylinder, a reciprocable piston disposed therein, a crankshaft rotatable in forward and reverse directions and having an eccentric crankpin, and a cam disposed about the crankpin, the piston operatively connected to the cam. The cam is rotatable about the crankpin between a first angular position corresponding to a first piston stroke length during forward crankshaft rotation and a second angular position corresponding to a second piston stroke length during reverse crankshaft rotation. In one of its first and second angular positions, the cam is rotatably locked to the crankpin.Type: GrantFiled: June 17, 1998Date of Patent: September 14, 1999Assignee: Tecumseh Products CompanyInventor: Andrew W. Paczuski
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Patent number: 5938410Abstract: A dust sucking/blowing device including a housing including a fan chamber for receiving a fan therein, a dust collecting sleeve fitted around the fan chamber and formed with a first and a second inlets communicating with a dust collecting room which is formed with at least one perforation for communicating with the incoming compartment of the chamber. The sleeve is further formed with an outlet for communicating with the outgoing compartment of the fan chamber. A control guide cartridge includes a hollow cartridge body formed with an inlet section fitted with the outlet of the sleeve for guiding air flow into the cartridge body, and an outlet for outward guiding the air flow from the cartridge body. When the outlet of the cartridge body is aligned with the fitting hole of the second casing, the outlet of the cartridge body permits the air flow from the fan to be outward blown from the passage of the dust sucking/blowing tube fitted with the fitting hole for blowing away dusts.Type: GrantFiled: August 6, 1997Date of Patent: August 17, 1999Inventor: Jeen-Ju Lee
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Patent number: 5901802Abstract: Hydraulic passages for an oil pump for a speed reducer used in electric vehicle include a first passage for connecting an inlet port of an oil pump to an oil reservoir through a first check valve, a second passage for connecting an outlet port of the oil pump to a discharged-oil demand part through a second check valve, a third passage for connecting the outlet port to the oil reservoir through a third check valve, and a fourth passage for connecting the inlet port to the discharged-oil demand part through a fourth check valve. The check valves are disposed such that, upon normal rotation of the oil pump, the first and second check valves are opened, and upon reverse rotation thereof, the third and fourth check valves are opened.Type: GrantFiled: May 15, 1997Date of Patent: May 11, 1999Assignees: Nissan Motor Co., Ltd., Aichi Machine Industry Co., Ltd.Inventors: Yoshio Sunohara, Tozo Yamada, Akihiro Morita, Hiroyoshi Ario
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Patent number: 5735644Abstract: A blower assembly for a pneumatic transfer tube system alternately creates a pressure or a vacuum in a transfer tube. The blower is comprised of a housing having an internal cavity and a first and a second external port communicating with the cavity. A movable plate divides the internal cavity into two chambers which are generally isolated from each other. A blower having a vacuum end and a pressure end is mounted to the plate, wherein the vacuum end is on one side of the plate and the pressure end is on the other side of the plate. The blower when operating creates a pressure chamber on one side of the plate and a vacuum chamber on the other side of the plate.Type: GrantFiled: March 25, 1996Date of Patent: April 7, 1998Assignee: Diebold, IncorporatedInventors: Leo J. Grosswiller, Mark A. DePietro, Morton B. Albert, Kenneth L. Wilhelm, Robert J. Beck
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Patent number: 5586862Abstract: An AC motor driven centrifugal pump includes an AC motor, a symmetrical pump volute, and an impeller shaft which is coupled to an impeller hub having a plurality of radial vanes or fins. The pump volute is symmetrical about a vertical axis with an axial inlet port and substantially tangential side walls feeding a radial outlet port. According to the invention, a movable gate is arranged between the impeller and the outlet port. The impeller hub is arranged axially with the inlet port and has a smaller diameter than the inlet port so that fluid entering the inlet port is free to flow around the impeller hub and into the spaces between the vanes. The gate is free to move and to rest against the interior of opposite tangential side walls of the volute. When the impeller begins to turn, the pivotal gate moved under the force of the fluid flow to rest against the opposite side wall blocking the passage of fluid backflow.Type: GrantFiled: June 15, 1995Date of Patent: December 24, 1996Inventor: Michael Danner
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Patent number: 5456581Abstract: A multi-piston pump is provided which uses microprocessor controlled check all valves to control flow rate of a fluid at the pump's outlet port. The pump includes nine cylindrical shaped chambers and associated reciprocating pistons which are driven by a cam attached to a shaft. The pump's shaft is coupled to the shaft of a motor which, in turn, drives the pump's shaft and cam resulting in a fluid, such as seawater, filling each of the nine chambers and then having the fluid forced from the chamber by the movement of its associated piston from bottom dead center to top dead center. A pressure transducer which monitors the pressure at the pump's outlet port and a shaft encoder which monitors the angular position of the pump's shaft respectively provide analog signals indicative of the pump's outlet port's pressure and the shaft's angular position.Type: GrantFiled: August 12, 1994Date of Patent: October 10, 1995Assignee: The United States of America as represented by the Secretary of the NavyInventors: Gregory R. Jokela, Roman Kruchowy, James Massey
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Patent number: 5432265Abstract: The continuous removal of solid products from a high-pressure system is achieved by operating a high-pressure pump in reverse to gradually reduce pressure at the exit line to atmospheric pressure. This process allows solid products to exit the system while at the same time maintaining high pressure in the reactor.Type: GrantFiled: July 27, 1993Date of Patent: July 11, 1995Assignee: The United States of America as represented by the Secretary of AgricultureInventor: Peggy M. Tomasula
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Patent number: 5366355Abstract: A rotor rides on the shaft end and is eccentric with respect to the rotational axis of the shaft. The rotor rotates in the bore of a pivot ring and coacts therewith in the nature of a double action pumping such that there are two pumping cycles per revolution of the shaft.Type: GrantFiled: November 10, 1993Date of Patent: November 22, 1994Inventor: Douglas T. Patterson