Three Or More Radially Arranged Cylinders Patents (Class 92/148)
  • Patent number: 9624881
    Abstract: An airbox for an engine is provided. The airbox includes a first cylinder bank including a plurality of first cylinder sections. The airbox also includes a second cylinder bank including a plurality of second cylinder sections. The airbox further includes an isolation assembly provided in association with the first cylinder bank and the second cylinder bank. The isolation assembly is configured to isolate at least one first cylinder section of the plurality of first cylinder sections from another first cylinder section of the plurality of first cylinder sections, at least one second cylinder section of the plurality of second cylinder sections from another second cylinder section of the plurality of second cylinder sections, and the first cylinder bank from the second cylinder bank.
    Type: Grant
    Filed: October 21, 2014
    Date of Patent: April 18, 2017
    Assignee: Electro-Motive Diesel, Inc.
    Inventor: Deep Bandyopadhyay
  • Patent number: 8991297
    Abstract: A compressor includes a housing; a compressor liner positioned within the housing and at least partially defining a first cylinder with an inlet and an outlet; a piston positioned within the first cylinder and configured to compress air flowing into the first cylinder through the inlet; a cylinder head at least partially defining the first cylinder; and a sealing assembly for sealing an interface between the compressor liner and the cylinder head. The sealing assembly includes a ring seal at an interface between the cylinder head and the compressor liner; a vent port on an opposite side of the ring seal from the first cylinder; and a vent tube extending between the vent port and the inlet such that air leaking through the ring seal from the first cylinder flows through the vent port, through the vent tube, and into the inlet.
    Type: Grant
    Filed: October 13, 2011
    Date of Patent: March 31, 2015
    Assignee: Honeywell International Inc.
    Inventors: Dan Potter, Trung Tran
  • Patent number: 8925440
    Abstract: A hydraulic module includes a pump housing with an opening in communication with an exterior surface of the pump housing. A plurality of pump chambers are in communication with the opening. A plurality of pump elements correspond to the plurality of pump chambers, each of the plurality of pump elements being movable within the respective one of the pump chambers to increase the pressure in a fluid from a suction side of the pump chamber to a pressure side of the pump chamber. A motor has an output member extending into the opening of the pump housing and coupled with the plurality of pump elements. A channel is formed in the exterior surface of the pump housing. The channel establishes fluid communication between the plurality of pump chambers.
    Type: Grant
    Filed: December 13, 2011
    Date of Patent: January 6, 2015
    Assignee: Robert Bosch GmbH
    Inventors: Guy Michalski, Douglas Patterson, Bernhard Gnamm
  • Patent number: 8708667
    Abstract: A fuel pump assembly for a fuel injection system comprises a drive shaft, at least two pump heads each of which is axially displaced along the drive shaft, each pump head having a respective plunger for pressurising fuel within a respective pump chamber, and at least two cams provided on the drive shaft, each of which is associated with a respective one of the pump heads. Adjacent pump heads are offset angularly from one another by an amount sufficient to allow a region of overlap, in an axial direction along the drive shaft, between the adjacent pump heads.
    Type: Grant
    Filed: October 6, 2009
    Date of Patent: April 29, 2014
    Assignee: Delphi International Operations Luxemboug S.A.R.L.
    Inventor: Peter Alban George Collingborn
  • Patent number: 8522432
    Abstract: A method for manufacturing radial pistons for a hydraulic motor by machining cylindrical transverse holes at regular intervals in a bar, and, in order to form two adjacent pistons, cutting up the bar on a transverse cutting-up plane passing through one of said holes so that a first portion of said hole forms a cradle-shaped recess in the base of the first one of the two adjacent pistons and so that another portion of said hole forms a cradle-shaped recess in the top of the second one of the two adjacent pistons.
    Type: Grant
    Filed: December 8, 2011
    Date of Patent: September 3, 2013
    Assignee: Poclain Hydraulics Industrie
    Inventors: Gilles Lemaire, Alain Noel
  • Patent number: 8371210
    Abstract: A scotch yoke type fluid device in which the pistons are decoupled from each other is provided. Each piston of the device has its own pair of sliding surfaces and its own slider. The sliding surface of each piston is disposed on the same side of a big end bearing of a crank. The main axis of the crank is movable along a path such that the pistons are neither substantially retarded nor advanced. The effective centre of mass of the crank, piston and slider remains stationary relative to the crank axis. Each piston includes a guide for constraining the piston to move along the piston axis. An intermediate member may interconnect the piston and the slides.
    Type: Grant
    Filed: November 4, 2011
    Date of Patent: February 12, 2013
    Inventors: Peter Robert Raffaele, Michael John Raffaele
  • Patent number: 8281707
    Abstract: A piston for a hydraulic motor including a body having a guiding and sealing surface, a base, and a top, which top is providing with a cradle-shaped recess. The base is provided with an additional cradle-shaped recess whose concave surface faces in the direction in which the concave surface of the recess in the top faces.
    Type: Grant
    Filed: March 30, 2007
    Date of Patent: October 9, 2012
    Assignee: Poclain Hydraulics Industrie
    Inventors: Gilles Lemaire, Alain Noel
  • Publication number: 20120073296
    Abstract: The present invention is directed to a Rotary Cam Radial Steam Engine of a single or multiple pistons and cylinders, which are driven lineally by the introduction of pressure from an external source, through a single, centralized rotating valve. The valve has been designed to provide timed introduction of the pressurized gasses into each cylinder at the moment determined to be best for the engine's applied use, and then the same central rotating valve assembly at the appropriate moment opens to allow the used pressure to exhaust it into the atmosphere, or a collection system. The lineal direction of the pistons is then directed outward and onto an external rotating cam which converts the lineal energy into circular rotating energy. The engine can be disassembled for servicing or complete rebuilding and reassembled quickly with use of no tools.
    Type: Application
    Filed: September 23, 2010
    Publication date: March 29, 2012
    Inventor: Michael W. Courson
  • Patent number: 7980829
    Abstract: A reciprocating compressor or pump features a manifold arranged not only to define a hollow interior for receiving fluid discharged from a plurality of cylinders but also to define a base or frame on which the cylinders are carried. Unique valves formed in part by flexible material reduces the likelihood of fatigue and increases efficiency by retaining less heat relative to conventional reed valves. A compressor or pump mounted at an end of a handle extending parallel to a motor housing likewise extending from the compressor or pump provides an easy to carry portable assembly. A fan mounted between a motor and a compressor pulls air through the compressor inlet to both cool the motor and feed the compressor. A portable tool system powers both pneumatic and electric tools. Connecting rod structures for radial compressors or pumps provide improved strength and easier assembly.
    Type: Grant
    Filed: June 8, 2007
    Date of Patent: July 19, 2011
    Inventors: Larry Alvin Schuetzle, Lloyd Dean Penner
  • Patent number: 7736132
    Abstract: A compressor suitable for use in a portable oxygen concentrator. In one exemplary embodiment, the compressor includes a crankshaft rotatable about a central axis and a plurality of diaphragm assemblies spaced apart around the central axis generally within a plane. The diaphragm assemblies include diaphragms movably mounted to respective housings to at least partially define chambers. A plurality of rods extend between respective diaphragms and the crankshaft. The rods are coupled to the crankshaft such that the rods are offset axially from one another along the central axis and are coupled to the diaphragms for cyclically increasing and decreasing pressure within the chambers as the crankshaft rotates about the central axis.
    Type: Grant
    Filed: March 30, 2007
    Date of Patent: June 15, 2010
    Assignee: Respironics Oxytec, Inc.
    Inventors: Peter L. Bliss, Charles R. Atlas, Scott C. Halperin
  • Patent number: 7334514
    Abstract: This invention provides a modular, efficient and self-feedback/balance, fluid-powered actuation system. This system comprises two basic modules; actuation module and positioning module, which are directly connected to each other. The actuation modules can be constructed as a triple acting actuator having a novel balanced linear-rotary mechanism converter or a double acting actuator with two novel balance guide bars. The positioning module is constructed as a two-staged, self-feedback/balance positioner with position as a variable for controlling positions of an output shaft of the actuation modules. An input shaft in the positioning module is operated by three types input signals. This system also provides a rotary force to actuate and control different rotary valves with lighter weight, superior seal and high accuracy and can be used for quick cycle, high vibration applications or other critical services.
    Type: Grant
    Filed: August 5, 2004
    Date of Patent: February 26, 2008
    Inventor: Jianchao Shu
  • Patent number: 7168929
    Abstract: A pump unit for a hydraulic vehicle brake system with traction control has an electric motor driving a radial piston pump. A rotor shaft of the pump unit has a hollow shaft with two standardized, hardened cylindrical pins that are press-fitted into the ends of the hollow shaft. The rotor shaft can be produced simply, economically, and without metal-cutting machining. The hollow shaft has high bending and torsional strength. The rotor shaft has a small diameter at the bearing points, which makes a small bearing diameter and thus a small installation space for the pump unit possible.
    Type: Grant
    Filed: July 25, 2001
    Date of Patent: January 30, 2007
    Assignee: Robert Bosch GmbH
    Inventors: Heinz Siegel, Norbert Alaze, Dieter Merklein, Michael Schlitzkus, Andreas Weh, Alexander Bareiss
  • Patent number: 7093528
    Abstract: An epicycling device with improved sealing. A housing is provided with adjacent walls spaced apart to allow a substantially planar partition to pass. A piston is linked eccentrically to a drive shaft and positioned within the housing, has a cross sectional shape for mating with the housing walls and includes a circular recessed surface at its corners. Seal housings with a hollow cylindrical cross sectional shape are provided at each corner of the piston housing. An inner seal element is positioned within each of the recessed surfaces with the inner seal element including an elongate cylindrical body with a slot therethrough. An outer seal element is positioned within the seal housings with the outer seal element including an elongate cylindrical body with a slot. A partition is positioned between each pair of the inner and outer seal elements and slidably engaged with the slots in the seal elements.
    Type: Grant
    Filed: October 29, 2004
    Date of Patent: August 22, 2006
    Inventor: Rory S. McFarland
  • Patent number: 5897302
    Abstract: The invention is based on a reciprocating piston pump having two radial pistons disposed symmetrically to one another, which are drivable to a reciprocating motion by an eccentric disposed between them and are held in contact with the eccentric by a hoop spring that engages the pistons. For ease of installation, the invention proposes embodying the hoop spring as a bent wire part, with two open, hooklike eyelets on their ends, which ends are inserted into annular grooves of the pistons and enter into a snap connection with them in order to hold the pistons tightly against the eccentric.
    Type: Grant
    Filed: October 2, 1996
    Date of Patent: April 27, 1999
    Assignee: Robert Bosch GmbH
    Inventors: Heinz Siegel, Ernst-Dieter Schaefer, Guenter Krenz, Dirk Merbold
  • Patent number: 5839349
    Abstract: A reduced noise radial piston pump with a driving motor for a controlled brake system. The noise reduction is primarily accomplished by locating and orienting the motor/pump bearings with respect to the pump pistons.
    Type: Grant
    Filed: July 19, 1995
    Date of Patent: November 24, 1998
    Assignee: ITT Automotive Europe GmbH
    Inventor: Peter Volz
  • Patent number: 5655486
    Abstract: A machine having a piston unit within a cylinder arrangement wherein each piston unit comprises a plurality of in-line pistons within their respective cylinders such that the pistons are in fluid communication with a common compression chamber and where the pistons of each unit move in unison.
    Type: Grant
    Filed: August 13, 1996
    Date of Patent: August 12, 1997
    Assignee: Split Cycle Technology Limited
    Inventor: Alfred Rickard Mayne
  • Patent number: 5573386
    Abstract: A reciprocating piston pump having a housing, pistons disposed opposite one another in the housing, an eccentric between the pistons, annular grooves that fit around the piston necks machined into piston ends oriented toward the eccentric, and a U-shaped hoop spring curved radially outside the eccentric in the circumferential direction thereof. The hoop spring includes forklike hoop spring ends which engage the annular grooves and press the piston ends toward the eccentric. In the circumferential direction of the substantially U-shaped hoop spring, a continuation is formed on the hoop spring and together with a stop disk aligned transversely to the eccentric shaft, forms a device that limits the pivotability of the hoop spring about the piston necks. The reciprocating piston pump is usable for instance in hydraulic motor vehicle brake systems and in other hydraulic equipment.
    Type: Grant
    Filed: January 18, 1995
    Date of Patent: November 12, 1996
    Assignee: Robert Bosch GmbH
    Inventors: Edgar Schmitt, Barbara Schwind-Grellmann, Harald Ott
  • Patent number: 5279209
    Abstract: A machine that converts between reciprocating motion of a piston and rotary motion of a shaft. The shaft rotates an integral web that carries a number of lobe wheels spaced evenly about a pitch circle centered on the shaft. The lobe wheels are planetary driven by pinions and a fixed ring gear. The lobe wheels are somewhat star shaped with radially extending lobes which push followers outwardly, then release them inwardly, as the lobe wheels orbit past and below the follower. The follower is connected by a lever and a pair of connecting rods and to the piston.
    Type: Grant
    Filed: November 13, 1992
    Date of Patent: January 18, 1994
    Assignee: Split Cycle Technology, Ltd.
    Inventor: Alfred R. Mayne
  • Patent number: 4983100
    Abstract: A radial piston pump in which an annular coupling device (10), whose axially directed extensions (11) each engage a working piston, has a preset break point (15) in the area of the axial extensions (11).
    Type: Grant
    Filed: November 27, 1989
    Date of Patent: January 8, 1991
    Assignee: Alfred Teves GmbH
    Inventor: Ludwig Budecker
  • Patent number: 4977606
    Abstract: A radial piston pump has diametrically opposed pistons coupled to each other by a coupling ring mounted in circumferential grooves located adjacent the facing ends of the piston. The coupling ring is formed with axially projecting bifurcated arms received in the piston grooves. The arms are of a reversely bent undulating shape which is compressed between opposed walls of the groove to firmly couple the ring to each piston. The ring is thus supported entirely by the pistons. A central opening through the ring is expanded in the direction normal to the piston axis to provide clearance for side to side motion of an eccentric which drives the pistons in reciprocation.
    Type: Grant
    Filed: April 26, 1989
    Date of Patent: December 11, 1990
    Assignee: Alfred Teves GmbH
    Inventor: Ludwig Budecker
  • Patent number: 4920862
    Abstract: The cylinders of the compressor each have a guide piston connected with a work piston with each being reciprocally mounted within a guide cylinder and work cylinder. In addition, seals are provided between the guide piston and the guide cylinder within a half-portion of the guide piston proximate to the work piston while a scraper ring is provided in a second half-portion of the guide piston remote from the work piston in order to meter lubricant between the guide piston and guide cylinder. Excess lubricant which is splashed from the crank case into the guide cylinder is returned via the scraper ring to the crank case.
    Type: Grant
    Filed: September 22, 1988
    Date of Patent: May 1, 1990
    Assignee: Maschinenfabrik Sulzer-Burckhardt
    Inventor: Eduard Muller
  • Patent number: 4747339
    Abstract: In a radial piston machine which includes a driven rotatable rotor with radial pistons displaceable in radial recesses of the rotor by pressure medium and carrying rollers which cooperate with a cam track of the rigid cam plate, the length of the rollers can be increased due to the provision in the bores receiving the rollers respective opposing recesses in which portions of the roller are received.
    Type: Grant
    Filed: July 29, 1986
    Date of Patent: May 31, 1988
    Assignee: Mannesmann Rexroth GmbH
    Inventors: Peter Wusthof, Sinclair Cunningham
  • Patent number: 4745846
    Abstract: In a fluid pump or motor improvements are provided to the piston shoes therein to permit a higher pressure in the respective device. Other improvements are done to the hydrostatic bearings in radial piston or radial chamber type fluid motors and pumps. A further arrangement is, that plural pistons are applied to permit the use of two different fluids in the respective device. This leads also to the application of disc springs and their modification in a pump or motor to make the pumping of non-viscous fluids like water possible at very high pressure. Motors are provided with arrangements to permit them to drive and to carry simultaneously or to have hollow shafts, whereby improved and novel machines and vehicles are obtained.
    Type: Grant
    Filed: December 16, 1985
    Date of Patent: May 24, 1988
    Inventor: Karl Eickmann
  • Patent number: 4653381
    Abstract: A motor suspension apparatus for a hydromotor of the radial-symmetrical type, characterized by an arm which, in operation, is substantially horizontal, and one end of which is adapted for attachment to the hydromotor and the other end of which is pivotally and fixedly supported in a vertical plane, while between the ends of the arm there is provided a supporting device exerting on the arm a vertical force proportional to the working pressure prevailing in the hydromotor.
    Type: Grant
    Filed: October 7, 1985
    Date of Patent: March 31, 1987
    Assignee: Noord-Nederlandsche Machinefabriek B.V.
    Inventor: Cornelis J. van Os
  • Patent number: 4610606
    Abstract: A gas refrigerant compressor comprises a shaft having a first portion and an offset portion. A body supports the first portion of the shaft for rotating movement around an axis of rotation and defines a compression chamber. A compression member is adapted for reciprocating movement within the compression chamber. The compression member is connected to the offset portion of the shaft such that rotating the shaft draws gas refrigerant into the compression chamber upon movement of the compression member toward the axis of rotation and exhausts compressed gas refrigerant out of the compression chamber upon movement of the compression member away from the axis of rotation.
    Type: Grant
    Filed: August 6, 1984
    Date of Patent: September 9, 1986
    Assignee: HCH Development, Inc.
    Inventors: Preston C. Hazzard, Chris N. Hazzard
  • Patent number: 4545732
    Abstract: The pump contains cylinders (1) which are arranged in the form of a star and which are attached to a molding (12) with valve cartridges (8 and 9) being interposed. This molding (12) consists of two sets of pipes (17 and 18) which are arranged in the form of a star. The suction channels (13) of the pump are formed in one of the sets of pipes (17). The delivery channels (14) are formed in the other of the pipe sets (18). The central ends of the suction channels (13) open into a cavity (15) which is located in the center of the molding (12) and which is provided with a screw sleeve (16) for attaching a suction line. The central ends of the delivery channels (14) are connected to one another in flow terms, and one of the delivery channels (14) is provided with an outflow orifice (23) for the fluid. The use of the molding mentioned makes it substantially simpler to connect the individual parts of the pump to one another and to the lines attached to the pump.
    Type: Grant
    Filed: July 8, 1983
    Date of Patent: October 8, 1985
    Inventor: Guido Oberdorfer
  • Patent number: 4370917
    Abstract: A piston-rack rotary actuator having four pistons each with an integral rack and each displaceable along a cylinder unique thereto, the racks meshing with a center gear at equiangularly spaced points and causing angular movements of a shaft about its rotational axis when said pistons are displaced along their respective cylinders, said gear being secured to said shaft. The racks are formed in respective webs which are supported by the actuator body in such a manner as to prevent piston-slewing which would otherwise occur due to the separating force generated by the meshing gear and racks when said racks are moved relatively to the gear.
    Type: Grant
    Filed: July 8, 1980
    Date of Patent: February 1, 1983
    Inventor: Alan D. Bunyard
  • Patent number: 4331064
    Abstract: The invention relates to a hydraulic engine with radial pistons, comprising girders which transmit the thrusts of the pistons and rest against strips secured to the cylinder block.The surface of the cylinder block has a degree of roughness at least equal to the following values given in reference to the currently applied norms 0.25 .mu.RA; 15 .mu.Rt; and 8 .mu.Rp.The invention finds its application in the production of a reliable engine.
    Type: Grant
    Filed: February 4, 1980
    Date of Patent: May 25, 1982
    Assignee: Poclain Hydraulics
    Inventor: Jean-Francois Cheylus
  • Patent number: 4256018
    Abstract: The invention relates to an engine with radial pistons 9, which are coupled to elastic return means 25 for free-wheeling operation.Said elastic means are constituted by springs 25 whose number is equal to that of the pistons and by levers 21 mounted to pivot, each with respect to a piston 9, about an axis parallel to the axis of rotation 6 of the cylinder block 7, and equal in number to the springs, whereas each spring 25 is coupled to two levers 21, each lever constituting the bond for two springs 25.An application is the production of a hydraulic engine which is reliable and of simple design.
    Type: Grant
    Filed: April 12, 1979
    Date of Patent: March 17, 1981
    Assignee: Poclain Hydraulics
    Inventors: Jean-Pierre Badoureaux, Jean-Francois Cheylus
  • Patent number: 4223595
    Abstract: The device is comprised of an auxiliary annular element concentrically mounted on each piston end facing the spherical surface of the rotor. Each piston end is provided with an annular shoulder bearing against a matching annular shoulder formed on the inner periphery of the circular aperture through which the auxiliary annular element is mounted on the piston end. The same auxiliary annular element is also provided with oppositely disposed lateral flanges, in a position corresponding to the sides of the rotor, each having a respective recess which is open in the axial direction opposite to the corresponding side of the rotor and extending in the circumferential direction in an arc of a circle concentric with the rotor. Coupling rings disposed at the sides of the rotor, concentrically therewith, engage said recesses to hold the piston end in contact with the spherical surface of the rotor.
    Type: Grant
    Filed: May 18, 1978
    Date of Patent: September 23, 1980
    Assignee: Riva Calzoni S.p.A.
    Inventor: Aurelio Ortelli
  • Patent number: 4212230
    Abstract: Piston shoes in radial piston devices of the prior art were provided with balancing fluid pressure pockets of circular configuration or of elongation normal to the movement direction of the piston shoes. Piston shoes had to provide the space for said pockets and thereby extended over the diameter of the piston. That resulted in deformation of the piston shoe and in friction in areas that cannot be lubricated between the piston shoe outer face and the piston actuator guide face. The invention provides a pair of balancing pockets normal to that of the prior art and extended in the movement direction of the piston shoes. Piston shoes are therefore short in the direction of the pivot axis, deformations are prevented and the areas that cannot be lubricated are reduced to a minimum or removed. The piston shoe becomes thereby able to operate under higher pressures, increased relative speeds and with better efficiency at assured perfect lubrication between neighboring faces.
    Type: Grant
    Filed: August 5, 1977
    Date of Patent: July 15, 1980
    Inventor: Karl Eickmann
  • Patent number: 4077267
    Abstract: A fluid transducer including a reciprocatory piston member and a drive mechanism for converting reciprocation of the piston member into rotation of a rotary member coupled to the mechanism, or vice versa. The drive mechanism includes a first elliptical member centrally mounted within said transducer and a second elliptical member rotatably mounted in engagement with said first member and arranged for reciprocation with said piston member. As said piston member reciprocates said second member rotates with respect to said first member to transmit motion between said piston and said rotary member coupled to the drive mechanism.
    Type: Grant
    Filed: July 9, 1976
    Date of Patent: March 7, 1978
    Inventor: Henry Schottler
  • Patent number: 4041844
    Abstract: The guide means for reciprocating the pistons of the cylinder block are mounted on rings which have bearing surfaces eccentric to the surface on which the cylinder block rotates. These rings are also of a diameter greater than the diameter of the surface on which the cylinder block rotates by at least twice the eccentricity of the machine.
    Type: Grant
    Filed: June 9, 1975
    Date of Patent: August 16, 1977
    Assignee: Sulzer Brothers Limited
    Inventor: Anton Steiger
  • Patent number: 4037523
    Abstract: A radial-piston machine has a rotor formed with a plurality of axially extending slots in each of whose bases is formed a piston-carrying radial cylinder. Each such piston is formed on its radially outer end with a part-spherical seat and a part-spherical portion of a respective piston shoe that rides on an eccentric cam in the housing is engageable in each seat. Each such piston shoe can move radially into and out of engagement with the respective piston. A pair of end members axially flank the piston shoes with play so that these shoes may also move axially relative to the rotor. The piston-engaging portions of the shoes are slightly narrower than the respective cross-slots so that angular free play is also present, and these portions are always engaged radially in the slots.
    Type: Grant
    Filed: November 29, 1974
    Date of Patent: July 26, 1977
    Inventor: Karl Eickmann
  • Patent number: 4033239
    Abstract: The moving parts of the machine are mounted as a unit on the control journal. These parts include the cylinder block, pistons, piston guide ring, lateral support disks and drive shaft. The unit may be removed as such without having to remove the control journal from the housing. The diameters of the bearing surfaces for the lateral support disks and cylinder block are of successively reduced diameter from each other to facilitate the unit construction.
    Type: Grant
    Filed: April 10, 1975
    Date of Patent: July 5, 1977
    Assignee: Sulzer Brothers Limited
    Inventor: Wilhelm Gsching, deceased
  • Patent number: 4030405
    Abstract: The invention relates to an improvement in a radial piston machine having a stationary member, a cylinder body rotatable about the stationary member and having cylinder bores, pistons reciprocable in the cylinder bores, a piston-control ring adjacent the cylinder body, and glide shoes on the pistons and in sliding engagement with the control ring. According to the improvement the member and the pistons are of case-hardened steel, the cylinder body is of alloyed pearlitic cast iron, and the control ring is of steel.
    Type: Grant
    Filed: September 21, 1973
    Date of Patent: June 21, 1977
    Assignee: Robert Bosch G.m.b.H.
    Inventors: Ulrich Aldinger, Gunter Kersten
  • Patent number: 4004498
    Abstract: An intermittent hydraulic motor which comprises: a crank shaft; a plurality of hydraulic cylinders having pistons engaging with an eccentric member of said crank shaft; pressure oil lines connected to said hydraulic cylinders; check valves having choke valves; and independent changeover valves which connect one of said hydraulic cylinders to a pressure pump and the others to an oil tank; and being characterized in that said crank shaft together with said eccentric member is rotated independently of synchronism with the crank shaft for a certain angle only by the application of oil pressure to said one of the hydraulic cylinders.
    Type: Grant
    Filed: September 8, 1975
    Date of Patent: January 25, 1977
    Assignee: Nissei Plastics Industrial Co., Ltd.
    Inventor: Katashi Aoki
  • Patent number: 3968736
    Abstract: A radial type of fluid-pressure apparatus, such as a pump or motor, wherein a crankshaft is supported for rotation about its axis and has a crankpin radially spaced from its axis and connected with the inner end region of a piston which extends outwardly away from the crankshaft axis and which has an outer end region extending into a chamber of an outer housing structure which surrounds the crankshaft axis. This chamber communicates with a fluid passage. An inner circular housing structure is surrounded by the outer housing structure and surrounds the crankshaft while being formed with an opening through which the piston extends, this inner housing structure having a seat at its opening which surrounds the piston. The latter seat forms part of a sphere. The piston extends slidably through a sleeve which has an outer surface also forming part of the latter sphere and seated on this seat.
    Type: Grant
    Filed: May 20, 1974
    Date of Patent: July 13, 1976
    Inventor: Felice Pecorari
  • Patent number: 3945303
    Abstract: The bearing surface of each piston is provided with hydrostatic pressure medium during operation to maintain the axis of the piston perpendicular to the guide surface. The pressure medium is supplied through throttle passages which terminate in feed openings at the corners or at uniformly distributed points remote from the piston axis. Cooperating guide ledges are also provided on each foot and on the guide member to prevent the piston bearing surfaces from falling away from their respective guide surfaces of the guide member.
    Type: Grant
    Filed: October 7, 1974
    Date of Patent: March 23, 1976
    Assignee: Sulzer Brothers Ltd.
    Inventor: Anton Steiger