By Changing Phasing Of Plural Pistons In Single Chamber Patents (Class 417/215)
  • Patent number: 9695835
    Abstract: A liquid ring pump is provided. The liquid ring pump is designed to reduce the overall envelop of the ring pump. The liquid ring pump includes a housing and an impeller. The housing defines an impeller cavity. The impeller cavity has an inlet port and a discharge port. The impeller is positioned within the impeller cavity for rotation about a central rotational axis. The impeller includes a central hub defining a conical outer surface and a plurality of angularly spaced apart main vanes extending radially outward from the conical outer surface relative to the central rotational axis. The inlet and discharge ports may be located on a same side of the impeller housing.
    Type: Grant
    Filed: August 8, 2013
    Date of Patent: July 4, 2017
    Assignee: Woodward, Inc.
    Inventor: Austin Wade Mueller
  • Publication number: 20130309103
    Abstract: A coolant pump of an internal combustion engine, with a pump housing and a hollow shaft rotatably mounted therein. Coolant is delivered via an impeller wheel from a suction connection. The flow is controlled by a guide plate on the impeller wheel that is variably displaceable axially between two end positions. The guide plate is adjustable by a push rod actuator guided in the pump shaft. The actuator has a radial piston pump integrated within the coolant pump with an intake piston and a counterpiston guided in the pump shaft, that are inserted lying opposite one another and delimit a pressure space. The pistons are enclosed outside by a linearly displaceable control element guided in the pump housing. Adjustment of the control element takes place as a function of a rotary angle of the pump shaft via an actuator unit having an electrically operated actuating element and a linear freewheel.
    Type: Application
    Filed: March 14, 2013
    Publication date: November 21, 2013
    Applicant: SCHAEFFLER TECHNOLOGIES AG & CO. KG
    Inventors: Markus Popp, Andreas Nendel
  • Patent number: 8449265
    Abstract: A hydraulically driven reciprocating pump. In some embodiments, the pump includes a housing including a hydraulic chamber, a cylinder coupled to the housing, a piston assembly adapted for reciprocal motion within the housing and the cylinder, the piston assembly separating the hydraulic chamber into three subchambers, and a hydraulic system fluidicly coupled to each of the subchambers. The hydraulic system is actuatable to deliver hydraulic fluid to a first of the subchambers, whereby the piston assembly strokes back and a working fluid is drawn into the cylinder, to deliver hydraulic fluid to a second of the subchambers, whereby the piston assembly strokes out and the working fluid is exhausted from the cylinder, and to adjust a volume of hydraulic fluid within a third of the subchambers, whereby the piston assembly translates to bring a pressure of the working fluid in the cylinder to within a pre-selected range.
    Type: Grant
    Filed: May 26, 2010
    Date of Patent: May 28, 2013
    Assignee: National Oilwell Varco, L.P.
    Inventor: Adrian Marica
  • Patent number: 7827961
    Abstract: A pump is provided for pumping two or more different fluids. The pump comprises a body having a longitudinal bore and at least first and second inlets selectively communicating with and providing passage to the bore via non-return valves. A plunger is mounted for reciprocation within the bore and at least one piston is also mounted for reciprocation within the bore so as to permit at least one type of fluid to pass into the bore through one or both inlets.
    Type: Grant
    Filed: November 5, 2008
    Date of Patent: November 9, 2010
    Assignee: Delphi Technologies Holding S.arl
    Inventor: Michael Peter Cooke
  • Patent number: 4940035
    Abstract: The pump of the invention has application as a fuel pump for delivering fuel over a range of flow rates to an internal combustion engine. The pump may however be employed in many other applications, such as chemical applications, medical applications and hydraulic applications for example, particularyly where fine control of the fluid flow rate and a fast response from the pump to flow rate change requirements is necessary.
    Type: Grant
    Filed: November 9, 1988
    Date of Patent: July 10, 1990
    Assignee: Her Majesty the Queen in right of New Zealand
    Inventor: Peter Waring
  • Patent number: 4537562
    Abstract: Pump having an inlet through which passes a medium intended for pumping, and an outlet through which passes the pumped medium. A drive source acts upon a number of pumping organs, said pumping organs being arranged in pairs as to be actuated by at least two rotable shafts, in addition to which pairs of pumping organs are arranged by means of communicating vessels and are driven by a cam on each shafts. Four rotable shafts (10, 20, 30, 40) are so arranged as to each interact with four pumping organs each. A pumping unit of 16 pistons are thus created. Several pumping units can be added together into one pump.
    Type: Grant
    Filed: February 23, 1984
    Date of Patent: August 27, 1985
    Inventors: Malte Lindmark, Margareta Lindmark
  • Patent number: 4086845
    Abstract: A variable delivery hydraulic equipment is designed to be operated as a pump or a motor and includes a cylinder block having a plurality of cylinder bores on the same circumference thereof and a plurality of plunger assemblies each disposed within the cylinder bore. The plunger assembly has a pair of plungers oppositely disposed within the cylinder bore so as to define a chamber therebetween and slidably movable within the cylinder bore. A pair of cams are disposed in contact with opposite plungers with the cylinder block disposed therebetween. The cams each have a cam surface for imparting a plurality of reciprocatory movements in one cycle to the opposite plunger in a manner that the moving velocities of the opposite plungers are different from each other in all phase position. The cam surfaces are formed to have sine curves each having two crests and a different stroke. In consequence, the volume of the chamber between the opposite plungers is always varied.
    Type: Grant
    Filed: March 9, 1976
    Date of Patent: May 2, 1978
    Inventor: Kinzo Takagi
  • Patent number: 4031778
    Abstract: A double-eccentric variable drive system is disclosed comprising a drive shaft, two eccentrics mounted on the drive shaft to be driven thereby, and means for varying the eccentricity of both of the eccentrics simultaneously. The means in question comprises a spindle having left-hand screw-threads on one end thereof and right-hand screw-threads on the other end thereof and an enlarged central portion rotatably mounted in the shaft but radially fixed relative thereto. The eccentrics each have a radial bore therethrough tapped to correspond with and receive the threads of the spindle, the bores being aligned on opposite sides of the shaft. Each eccentric has an axial bore larger than the diameter of the shaft in a direction parallel to the spindle to allow for movement of the eccentrics radially of the shaft.
    Type: Grant
    Filed: July 11, 1975
    Date of Patent: June 28, 1977
    Assignee: The International Nickel Company, Inc.
    Inventor: David Stephen Fazekas
  • Patent number: H2219
    Abstract: The coating method includes the steps of dissolving coating precursor(s) in a solvent to form a precursor solution: adding with mixing a miscible diluent to the precursor solution to form a coating solution; admixing solid particles to the coating solution to form a coating slurry, with the particles surrounded with the coating solution; spraying the coating slurry to form droplets containing at least one particle; passing the droplets through a drying zone where the droplets are dried and form dry particles coated with a coating material formed from the coating precursor(s); heat-treating the coating material on the particles emanating from the drying zone to remove volatile matter on the coating material, to improve integrity of the coating material and/or to effect another objective; and collecting dry coated particles.
    Type: Grant
    Filed: September 20, 2005
    Date of Patent: July 1, 2008
    Assignee: The United States of America as represented by the Secretary of the Navy
    Inventors: Shyam S. Bayya, Guillermo R. Villalobos, Jasbinder S. Sanghera, Ishwar D. Aggarwal