Patents Examined by Richard A. Bertsch
  • Patent number: 5525046
    Abstract: A high pressure cleaning device with a housing (1) containing a driving motor and a pump for cleaning fluid, in particular water, and a bypass valve arrangement, with a valve pistol (2) having a cleaning lance (3) or the like connected thereto, and with a high pressure line (4) leading to valve pistol (2) from a high pressure connection (4) on a housing (1). When the valve pistol (2) is closed, the pump continues to run and circulates, via the bypass valve arrangement, a finite, small volume of cleaning fluid. When the valve pistol (2) is in the closed position, a leakage flow passage having a very high flow resistance remains open, so that, even when the valve pistol (2) is in the closed position, a small leakage flow of cleaning fluid constantly drains out, and is replaced by a corresponding amount of fluid which flows in on the intake side of the pump and cools the circulating fluid.
    Type: Grant
    Filed: January 27, 1996
    Date of Patent: June 11, 1996
    Assignee: Elektra Beckum AG
    Inventor: Lothar Hartmann
  • Patent number: 5522707
    Abstract: A fluid flow delivery system switches a variable speed pump drive among a plurality of pumps. The remaining pumps can be operated as constant speed pumps and can be energized one at a time in response to increasing demand. The pump associated with the variable speed drive can be operated over a variable output range to provide relatively low levels of fluid output, in response to low demand, and can be operated in combination with one or more constant speed pumps to provide increased levels of output fluid in response to greater demand levels.
    Type: Grant
    Filed: November 16, 1994
    Date of Patent: June 4, 1996
    Assignee: Metropolitan Industries, Inc.
    Inventor: Richard W. Potter
  • Patent number: 5522709
    Abstract: Fluid transfer apparatus comprising a fluid reservoir and a pump connected to the reservoir by a supply line, wherein the apparatus is configured so that vapor generated in the pump during periods of inoperation may escape from the pump cavity through the pump inlet, rather than being trapped in the pump cavity, and liquid may flow into the pump cavity from the supply line through the pump inlet to replace escaping vapor, thereby providing reliable pump start-up during intermittent operation. The apparatus may be employed to pump LNG for fueling of vehicles. Where LNG or another cryogenic fluid is being pumped, the pump is preferably driven by a motor located above the pump and connected thereto by an elongated shaft. Shaft seals may be provided to prevent the fluid being pumped from contacting the motor or the bearings supporting the motor shaft. A vapor trap may be provided beneath the shaft seals to prevent contact between liquid being pumped and the shaft seals.
    Type: Grant
    Filed: June 5, 1995
    Date of Patent: June 4, 1996
    Assignee: Liquid Carbonic Corporation
    Inventor: George D. Rhoades
  • Patent number: 5522708
    Abstract: An improved sampling pump has utility for withdrawing contaminated fluid from a low pressure source and outputting cleaned fluid to a sampling container. The fluid pump assembly of the present invention includes an operator unit for reciprocating plunger, and a side body port positioned within the pump body for receiving a removable filter. The pump assembly includes a discharge check valve which is ideally positioned within the pump body for minimizing "dead areas" within the pump, but is also adjustable for controlling the downstream pressure generated by the pump. An operator unit for the pumping assembly may include a spacer attached to the operator piston for selectively controlling the pump stroke. The pump assembly preferably has a pump body inlet port substantially aligned with the plunger axis. High pump reliability is obtained by the preferred filtering technique which cleans both the fluid supplied to the pump and the fluid supplied to the operator unit.
    Type: Grant
    Filed: January 17, 1995
    Date of Patent: June 4, 1996
    Assignee: PGI International, Ltd.
    Inventor: Spencer M. Nimberger
  • Patent number: 5520517
    Abstract: The invention is a constant flow pump control system that compensates for a change in gas flow rate that is caused by a change in the load resistance, by making the speed change inversely with the change in load resistance, desirably by sensing the change in pressure and changing speed by an amount related to the pump performance characteristic that is required to restore the flow rate to its selected value. In a preferred embodiment the system includes a closed loop pump speed control in which a selected flow rate reference is combined with a pressure feedback to provide an inverse change in the pump speed reference function or a direct change in the motor speed feedback function to compensate for the change in flow rate caused by a change in flow resistance.
    Type: Grant
    Filed: June 1, 1993
    Date of Patent: May 28, 1996
    Inventor: Anatole J. Sipin
  • Patent number: 5519991
    Abstract: There is disclosed an anode for an electrothermal arcjet thruster. The anode includes a divergent nozzle having, in tandem, a recombination portion and an expansion portion. The expansion portion has a greater rate of divergence than the recombination portion. A regeneration channel containing flowing propellent gas extends internally within the anode adjacent the recombination portion. The combination of the biangle nozzle and the regeneration channel produces an arcjet thruster having a markedly increased thrust efficiency.
    Type: Grant
    Filed: August 30, 1994
    Date of Patent: May 28, 1996
    Assignee: Olin Corporation
    Inventor: George W. Butler
  • Patent number: 5520522
    Abstract: A micro pump which employs magnetostrictive or electrostrictive elements as solid drive elements and is capable of self-priming even though its flow rate is increased. In the pump, disk-shaped valve elements respectively having tapered protrusions on one side are used as check valves to reduce weight and made to follow the motion of liquids so as to smoothly open and close. Retainers for regulating the gap h between the valve seats and the valve elements are respectively provided with tapered recesses for guiding the protrusions of the valve elements, whereby the valves are prevented from contacting the retainers, thus undergoing less friction therewith, to ensure smooth opening and closure of the valves. Moreover, ringlike or sheetlike elastic materials are provided on the bottoms of the recesses to improve responsivity in the direction in which the valves are closed.
    Type: Grant
    Filed: September 21, 1994
    Date of Patent: May 28, 1996
    Assignee: TDK Corporation
    Inventors: Amer R. Rathore, Shigeo Okamoto, Teruo Mori
  • Patent number: 5520521
    Abstract: In a hydraulic control device for a viscous fluid pump with at least one feed cylinder (11) drivable by a hydraulic cylinder (12), the feed chamber (17) of which can be alternately connected via a hydraulically operable inlet valve (18) a hydraulically operable outlet valve (21) to a reservoir (19) and a feed line (22), whereby in the loading phase of the feed cylinder (11) the inlet valve (18) is open and the outlet valve (21) closed and in the feed phase of the feed cylinder, in which its piston is driven so as to reduce the volume in the feed chamber (17), the outlet valve is open and the inlet valve is closed, and with a hydraulic sequence control actuating the correct cyclic changeover between the inlet and outlet valves and the changeover of the pump drive, a valve forming part of the changeover control device of the sequence control and relieving the pressure in the feed chamber of the control cylinder (53) designed to actuate the outlet valve (21) takes the form of an electrically or hydraulically act
    Type: Grant
    Filed: February 15, 1994
    Date of Patent: May 28, 1996
    Assignee: Putzmeister-Werk Maschinenfabrik GmbH
    Inventors: Hartmut Benckert, Hans Renz, Werner Muenzenmaier
  • Patent number: 5520519
    Abstract: A base attachment for use with an air compressor having a motor enclosed within a housing, a compressor unit operatively connected to the motor and emitting compressed air from an air outlet, the base attachment including a tubular segment having a first end portion for receiving the compressed air emitted by the air outlet, and a second end portion for emitting the air to a pneumatically powered tool, wherein the tubular segment is constructed and arranged to provide a temperature and pressure regulating sink for emitting compressed air which is cooler and at more uniform pressure than air emitted directly from the air outlet.
    Type: Grant
    Filed: September 9, 1994
    Date of Patent: May 28, 1996
    Assignee: Seiko Epson Corporation
    Inventor: Thomas A. Birkeland
  • Patent number: 5518292
    Abstract: A fixing device (1) for securing a cover (3) to a seat (4) comprises a support (2), and a plurality of elastic fastenings (5) locked in the support (2), wherein the support (2) comprises more locking apertures (8) than the device (1) has elastic fastenings (5). The support (2) is sewn onto the covering (3), the fastenings (5) are locked in the support (2), and after positioning the covering (3) on the seat (4), the hooks (11) of the fastenings (5) are engaged upon components (17) of the seat (4).
    Type: Grant
    Filed: November 8, 1993
    Date of Patent: May 21, 1996
    Assignee: ITW De France
    Inventor: Henri Cozzani
  • Patent number: 5518371
    Abstract: A fluid pressure system comprising an electric motor-driven pump for maintaining a predetermined pressure range in a system, including a remote solid-state encapsulated triac motor control circuit having a micro pressure sensor switch in the outlet duct from the pump. For example, this control device includes a special nipple for installation in a water well casing for maintaining a given range of water pressure in a system supplied by the well.
    Type: Grant
    Filed: June 20, 1994
    Date of Patent: May 21, 1996
    Assignee: Wells, Inc.
    Inventors: Steffen R. Wellstein, Henry R. Burgess, William S. Jack
  • Patent number: 5517817
    Abstract: The present invention is a variable area turbine nozzle for use in a turbine engine. The variable area turbine nozzle adjusts the positions of its vanes to insure efficient operation of the turbine engine. The vanes rotate about bearing assemblies that are air cooled to extend the operating life of the bearing assemblies. Each vane is cantilevered off journal bearings outside the outer casing which carry moment loads while ball bearings take all radial loads for ease of rotation. This design provides long running time of the turbine nozzles without frequent overhaul.
    Type: Grant
    Filed: October 28, 1993
    Date of Patent: May 21, 1996
    Assignee: General Electric Company
    Inventor: William R. Hines
  • Patent number: 5518373
    Abstract: A compressor start-up controller includes a compressing section (37-39) for compressing a refrigerant; a motor (25) connected to the compressing section for rotating the compressing section; a drive circuit (10) connected to the motor for driving the motor; a rotation detecting device (1) connected to the drive circuit for detecting whether the motor is normally rotating; a control unit (8) connected to the drive circuit for operating the motor in a step mode at a very slow rotation at its start-up for effecting electricity conducting control to gradually increase or decrease commutating current at a very slow speed during the step mode operation at the motor start-up.
    Type: Grant
    Filed: February 16, 1994
    Date of Patent: May 21, 1996
    Assignees: Zexel Corporation, Epson Corporation
    Inventors: Nobukazu Takagi, Kiyohiro Harada, Sakae Mashio, Akihito Uetake, Osamu Shinkawa, Takeshi Fujihisa
  • Patent number: 5517816
    Abstract: A rotary engine having a rotor mounted in an engine block for rotation and operable for rotation in either of opposing rotational directions. In one aspect, the rotary engine comprises an oil slinger concurrently rotatable to centrifugally disperse lubricants to interior surfaces of the engine block and rotor. In another aspect, the rotor may utilize a swept-back saw-toothed configuration or a cruciform arcuate shape. The rotary engine of the invention can be provided as a plurality of engine modules which are operatively interconnected to form a power train of desired size and capacity.
    Type: Grant
    Filed: October 26, 1993
    Date of Patent: May 21, 1996
    Inventors: John A. Faraci, Anthony J. Nino
  • Patent number: 5518374
    Abstract: A variable capacity refrigerant compressor, particularly a single headed piston type variable capacity refrigerant compressor having a framework unit including at least a cylinder block and defining a pulsation suppressing chamber therein fluidly communicating with a discharge chamber of a rear housing and connected to an external refrigerating system, the pulsation suppressing chamber suppressing pulsation in the discharge pressure of the compressed refrigerant before the refrigerant flows toward the refrigerating system, the pulsation suppressing chamber also fluidly communicating with a crank chamber defined by a front housing and the cylinder block so as to supply the crank chamber with the refrigerant at a high pressure an amount of which is regulated by a capacity control valve integrally accommodated in the pulsation suppressing chamber.
    Type: Grant
    Filed: July 13, 1995
    Date of Patent: May 21, 1996
    Assignee: Kabushiki Kaisha Toyoda Jidoshokki Seisakusho
    Inventors: Masaki Ota, Soukichi Hibino, Hisakazu Kobayashi
  • Patent number: 5518378
    Abstract: A peristaltic pump comprising a motor body (4), a cassette (1) with a casing (31) wherein are provided rotary rollers driven by a driving shaft (10) of the motor body (4) and which compress a deformable tube (25). The cassette further includes an error-preventing assembly having a platen (2) capable of taking either an active position where the driving shaft (10) actuates the rotary rollers (15) or a rest position where the rollers are fixed, and at east one finger (23) arranged on the lower part (14) of the cassette (1), the finger being capable of passing the platen (2) from the rest position to the active position.
    Type: Grant
    Filed: February 9, 1995
    Date of Patent: May 21, 1996
    Assignee: Debiotec S.A.
    Inventors: Frederic Neftel, Bernard Bouvier
  • Patent number: 5518334
    Abstract: Disclosed is a hinge connecting mechanism for connecting a connector housing to a lid in a hinged fashion via a hinge portion integrally molded with the connector housing with a small thickness. The hinge connecting mechanism assures that a malfunction does not arise where the hinge portion is undesirably broken or torn away from the container as the lid is repeatedly opened and closed. A plate member connected to a connector housing in a hinged fashion includes a hinge extension having the same width as that of a hinge portion, while extending in continuation from the hinge portion. The hinge extension is formed on a surface of the plate member adapted to face an upper wall of the connector housing when the plate member is closed.
    Type: Grant
    Filed: July 8, 1993
    Date of Patent: May 21, 1996
    Assignee: Yazaki Corporation
    Inventors: Sakai Yagi, Masanori Tsuji, Motohisa Kashiyama
  • Patent number: 5513959
    Abstract: A pump with a priming circuit containing a valve having a seating with an orifice and an obturator mounted so as to be able to be applied onto the seating in front of the orifice, where the obturator is a resilient blade embedded on one side to the seating. The flexibility of the blade increases from the embedded side to the other. An L-shaped member protrudes from an outer curvilinear wall of a priming element fixed onto the pump. The L-shaped member allows for the seating to be slide into a groove space. The obturator has two holes so that the obturator can be embedded onto the seat by mating with two projections from the seating surface.
    Type: Grant
    Filed: July 14, 1994
    Date of Patent: May 7, 1996
    Assignee: KSB S.A.
    Inventors: Christian Mabillot, Jean-Francois Fragnet
  • Patent number: 5513966
    Abstract: A liquid manifold for connecting to adjacent pumps, wherein the manifold has two sections. Each section is independently connected to a liquid pump and threadably secured to the pump at a position which provides the most precise alignment of the respective manifold sections. The manifold sections are then affixed together by fasteners through openings in one manifold section which are larger than threaded openings in the other manifold section. The larger openings permit a predetermined amount of misalignment to be present while still permitting a tight sealable connection to be made by the two manifold sections.
    Type: Grant
    Filed: June 6, 1995
    Date of Patent: May 7, 1996
    Inventor: Duane Krohn
  • Patent number: 5513489
    Abstract: A pulse detonation engine is provided with at least one detonation combustor selectively coupled to an air inlet and fuel source. The detonation combustors are equipped with either active or passive means to dissipate the heat of detonation. Fuel, air, and an oxidizer can be fed to said detonation combustors either through a rotary valve or through a conically shaped injector head.
    Type: Grant
    Filed: March 4, 1994
    Date of Patent: May 7, 1996
    Assignee: Adroit Systems, Inc.
    Inventor: Thomas R. A. Bussing