Element Extends Through Working Member Portion Patents (Class 92/33)
  • Patent number: 11110560
    Abstract: A piston (4) is inserted in a housing (1) so that the piston (4) is vertically movable. A housing hole (5) is vertically provided in the piston (4), and an output rod (6) is inserted in the housing hole (5) so that the output rod (6) is vertically movable. A converting mechanism (22) converts vertical movement of the piston (4) into rotary movement of the output rod (6). A guide groove (28) is provided in a circumferential direction on an inner circumferential wall of the housing hole (5), and a stopping part (29) is provided at an end part, in the circumferential direction, of the guide groove (28). An engaging member (31) which is provided on an outer circumferential wall of the output rod (6) is caused to face the stopping part (29) of the guide groove (28) at a given distance in the circumferential direction from the stopping part (29) so that the engaging member (31) can be in contact with the stopping part (29).
    Type: Grant
    Filed: March 14, 2018
    Date of Patent: September 7, 2021
    Assignee: KOSMEK LTD.
    Inventor: Keitaro Yonezawa
  • Patent number: 10895271
    Abstract: There is disclosed a rotary actuator apparatus for hydraulically or pneumatically rotating a robotic joint. In an embodiment the apparatus comprises: a curved piston rotatably coupled to an axle shaft, and positioned within a curved piston chamber; resilient barrier modules are adapted to separate the curved piston within the curved piston chamber from first and second hydraulic or pneumatic chambers on either side of the curved piston chamber; whereby, in use, the curved piston is configured to rotate about the axle shaft upon hydraulic or pneumatic pressure being applied to at least one of the first and second hydraulic or pneumatic chambers.
    Type: Grant
    Filed: March 11, 2019
    Date of Patent: January 19, 2021
    Assignee: MIRSEE ROBOTICS INC.
    Inventor: Robert David Ings
  • Patent number: 10190608
    Abstract: An actuator comprising: an inner cylinder received in an outer cylinder and a piston received in the inner cylinder that extends from the inner cylinder and the outer cylinder, the piston being slideable relative to the inner cylinder and the outer cylinder in response to the application of fluid pressure to cause the piston to extend further from the inner cylinder and the outer cylinder; and an auxiliary drive mechanism operable to cause the inner cylinder to extend from the outer cylinder, wherein the piston moves together with the inner cylinder relative to the outer cylinder.
    Type: Grant
    Filed: July 19, 2016
    Date of Patent: January 29, 2019
    Assignee: AIRBUS OPERATIONS LIMITED
    Inventor: Eric Wildman
  • Patent number: 10041510
    Abstract: A hydraulic actuator employing, in part, a short piston stroke distance and a planet gear amplification to achieve a relatively rapid actuation through a relatively low power input.
    Type: Grant
    Filed: August 19, 2015
    Date of Patent: August 7, 2018
    Inventor: Andrew J. Archer
  • Patent number: 9835183
    Abstract: A fluid-powered rotary actuator having a body with a shaft disposed therein and having a linear-to-rotary force-converting member mounted for longitudinal movement within said body in response to the selective application of pressurized fluid thereto. The actuator uses a torque member having a flange portion attached to the body or an external structure and a grooved central portion. A piston sleeve has outward grooves meshing with inward grooves on the shaft and inward grooves for meshing with outward grooves on the torque member central portion. The body sidewall is not used as a torque transmission surface during fluid-powered operation of the actuator.
    Type: Grant
    Filed: December 23, 2014
    Date of Patent: December 5, 2017
    Assignee: 1994 Weyer Family Limited Partnership
    Inventor: Dean R. Weyer
  • Patent number: 9151302
    Abstract: A rotating air cylinder is disclosed. The rotating air cylinder, comprises a first master cylinder comprising a first cylinder block, a first sealing assembly assembled in one distal end of the first cylinder block; a cylinder shaft partially received in the first cylinder block; a first piston assembly movably sleeving on the cylinder shaft, wherein the first piston assembly moves longitudinally within the first cylinder block, and rotates relative to the cylinder shaft; a second master cylinder positioned coaxial with the first master cylinder comprising a second cylinder block received in another part of the cylinder shaft; a second sealing assembly assembled in the second cylinder block; a second piston assembly received in the second cylinder block, non-rotatably and slidably connected with the cylinder shaft, wherein the second piston assembly moves longitudinally in the second cylinder block and rotates relative to an axis of the second cylinder block.
    Type: Grant
    Filed: December 15, 2011
    Date of Patent: October 6, 2015
    Assignee: JI ZHUN PRECISION INDUSTRY (HUI ZHOU) CO., LTD.
    Inventors: Xue-Fei Peng, Huan-Fan Xu
  • Publication number: 20150143989
    Abstract: The invention relates to an actuating device for a rotatable closure part of a valve, in particular a pneumatically or hydraulically actuatable rotary drive for a disk or throttle valve, with a housing, in which a drive piston that is sealed from a cylindrical housing casing is arranged and is suppliable on one side with a pressurizing medium, which preferably has a tubular piston skirt, with a drive shaft, which is guided on one side out of the housing and drives in a rotating manner the closure part indirectly or directly, wherein the drive piston executes either an axial shift movement against the effect of at least one return spring in the case of a one-sided supply with the pressurizing medium or a back and forth shift movement in the case of an alternating supply with a pressurizing medium, wherein the piston skirt experiences an axially oriented guidance in the housing via at least one axial groove formed in it, into which a straight-line guide cam permanently connected with the housing engages, and wh
    Type: Application
    Filed: August 21, 2012
    Publication date: May 28, 2015
    Applicant: GEA TUCHENHAGEN GMBH
    Inventors: Jens Burmester, Matthias Südel
  • Publication number: 20150089819
    Abstract: A mobile apparatus with a fluid pressure-operated implement mounted at a distal end of a boom includes a connection apparatus for selectively rotating the implement about an actuator axis at the distal end of the boom. The connection apparatus includes a rotary actuator and a pressurized fluid circuit for delivery of pressurized fluid through the rotary actuator to the implement. The pressurized fluid circuit includes channels establishing a fluidic connection axially through the rotating shaft of the rotary actuator. The pressurized fluid circuit facilitates passage of pressurized fluid through an internal, protected environment to the implement.
    Type: Application
    Filed: September 30, 2014
    Publication date: April 2, 2015
    Inventor: Jacob Schmotter
  • Publication number: 20150000515
    Abstract: A rotary actuator includes a housing having an interior boundary that defines a central bore and has interior recesses, a chamber housing assembly disposed in the central bore and having an arcuate chamber, the arcuate chamber comprising a cavity, an exterior boundary of the chamber housing assembly having exterior recesses, each of the exterior recesses aligned with a respective one of the interior recesses, pins residing between the interior boundary and the exterior boundary, each of the pins mated to one of the exterior recesses and a corresponding one of the interior recesses to maintain an orientation of the chamber housing assembly with respect to the housing, a rotor assembly rotatably journaled in the chamber housing assembly and comprising a rotary output shaft and a rotor arm, and an arcuate-shaped piston disposed in the chamber housing assembly for reciprocal movement in the arcuate chamber.
    Type: Application
    Filed: September 19, 2014
    Publication date: January 1, 2015
    Inventors: Pawel A. Sobolewski, Joseph H. Kim, Robert P. O'Hara, Shahbaz H. Hydari, Zenon P. Szulyk
  • Patent number: 8915175
    Abstract: A pneumatic cylinder includes a cylinder block, two piston rods, and two pairs of pistons. The cylinder block defines two receiving portions parallel to each other. Each receiving portion defines a first air chamber and a second air chamber; the second air chamber is in series with the first air chamber Each piston rod is partially received in one receiving portion. Each pair of pistons is sleeved on one piston rod, with two pistons received in the first air chamber and the second air chamber, respectively.
    Type: Grant
    Filed: March 8, 2011
    Date of Patent: December 23, 2014
    Assignees: Hong Fu Jin Precision Industry (ShenZhen) Co., Ltd., Hon Hai Precision Industry Co., Ltd.
    Inventor: Xiao-Bing Xu
  • Patent number: 8904917
    Abstract: A fluid-powered, helical rotary actuary is provided. The actuary includes a housing, a shaft with output ends positioned in the housing, and a piston sleeve surrounding the shaft and also positioned within the housing. The shaft includes a groove for receiving a collar. The collar creates a false shoulder such that the shaft is able to have the same diameter along the length of the shaft, thus allowing for a larger working area and more torque output density. The actuary also includes a support ring positioned on the shaft near the splined portion of the output end. The support ring is used to stabilize the attachment of an external member, and also to protect the shaft from damage caused by the splined receiving portion of the external member, or hub.
    Type: Grant
    Filed: April 15, 2011
    Date of Patent: December 9, 2014
    Assignee: Rosenboom Machines & Tool, Inc.
    Inventors: Darin Michael Rosenboom, Ryan Lee Bolkema, Daniel Jon Van Regenmorter
  • Publication number: 20140238230
    Abstract: A rotary actuator includes a first housing defining a first arcuate chamber having a first cavity, a first fluid port in fluid communication with the first cavity, and an open end. A rotor assembly is rotatably journaled in the first housing and having a rotary output shaft and a first rotor arm extending radially outward from the rotary output shaft. An arcuate-shaped first piston is disposed in the first housing for reciprocal movement in the first arcuate chamber through the open end, wherein a first seal, the first cavity, and the first piston define a first pressure chamber, and a first portion of the first piston contacts the first rotor arm.
    Type: Application
    Filed: February 27, 2013
    Publication date: August 28, 2014
    Applicant: WOODWARD, INC.
    Inventor: WOODWARD, INC.
  • Publication number: 20140238231
    Abstract: A rotary actuator includes a housing defining a first arcuate chamber comprising a cavity, a fluid port in fluid communication with the cavity, and an open end. A rotor assembly in the housing includes an output shaft and a rotor arm extending radially outward from the output shaft. An arcuate-shaped piston is disposed in the housing for movement in the arcuate chamber. The rotary actuator includes a fluid line is coupled to the fluid port, a high pressure fluid line, a low pressure fluid line, and a central pressure source coupled to the high pressure fluid line. A servo valve is positioned between the central pressure source and the hydraulic actuator and is controllable to selectively connect the fluid line to the high pressure fluid line and the low pressure fluid line to control movement of the hydraulic actuator.
    Type: Application
    Filed: April 22, 2014
    Publication date: August 28, 2014
    Inventors: Joseph H. Kim, Robert P. O'Hara, Shahbaz H. Hydari, Pawel A. Sobolewski, Zenon P. Szulyk
  • Patent number: 8777197
    Abstract: An annular piston is vertically movable and rotatable. A guide groove is provided in an outer peripheral portion of the annular piston, and an engaging ball to be fitted into the guide groove is provided on an inner peripheral wall of a cylinder hole. A transmission mechanism prevents the clamp rod and the annular piston from rotating relatively to each other and permits them to move relatively to each other in a vertical direction. When the clamp rod is moved from a released raised position to a locked lowered position, the annular piston descends while rotating via a rotational groove and the engaging ball, and the annular piston causes the clamp rod to rotate, causing the clamp rod to descend straight down.
    Type: Grant
    Filed: January 17, 2011
    Date of Patent: July 15, 2014
    Assignee: Kosmek Ltd.
    Inventor: Hideaki Yokota
  • Patent number: 8632413
    Abstract: A torsional vibration damper (1) having a damping element disposed between a first element (4) and a second element (5), in which the first element and the second element can rotate relative to each other, with or without a coupling part (3) that is located in a housing (2) and is axially displaceable along an axis (A) between the first and second elements, in which, if a coupling part is present, a) the coupling part is displaceable along the axis (A) against the spring force of at least one spring element (6, 7) and/or b) the coupling part is displaceable along the axis (A) against a medium which acts on both sides of the coupling part, with the medium located in internal or external partial spaces. Alternatively, in a damping element not having a coupling part, c) resilient elements are integrated in third coupling elements, and the coupling elements are connected to the first and second elements.
    Type: Grant
    Filed: May 25, 2009
    Date of Patent: January 21, 2014
    Assignee: Asturia Automotive Systems AG
    Inventors: Wolfgang Freund, Andreas Kissler, Juergen Schulze
  • Patent number: 8312618
    Abstract: In a module system for manufacturing variants of two and three stable positions fluid-operated actuators a cylinder housing of both variants of two and three stable positions actuators is manufactured from a blank. The blank includes at least one opening for a cover and is identical for the variants of the two and three stable position actuator, and is at least prepared for the arrangement of a first pressure duct, a second pressure duct, and a first cylinder diameter of the cylinder housing.
    Type: Grant
    Filed: November 22, 2006
    Date of Patent: November 20, 2012
    Assignee: Volvo Lastvagnar AB
    Inventors: Anders Hedman, Petter Frejinger
  • Publication number: 20100037763
    Abstract: Adjusting device which has a main cylinder (2) and a spring cylinder (3) arranged separately therefrom, wherein, during a pressure drop, the spring force acts hydraulically on the main cylinder (2). In order to design such an adjusting device more effectively, the effective spring piston area is variable.
    Type: Application
    Filed: June 27, 2007
    Publication date: February 18, 2010
    Inventors: Ulrik Dantzer, Kurt Beuschau
  • Patent number: 7574952
    Abstract: The invention relates to a drive, especially for rotary, pivotal or linear drive units, comprising a working piston (16), housed in a cylinder (12) of a housing (14), impinged by fluidic pressure media and displaced in the axial direction. The invention is characterized in that mechanical coupling elements (22, 24) are disposed on the working piston and can be coupled with a motor (30) in such a manner that the motor slows down and/or drives the working piston in the axial direction. The invention also relates to rotary, pivotal or linear drive units comprising said drive and to a method for operating a drive or a rotary, pivotal or linear drive unit.
    Type: Grant
    Filed: February 21, 2005
    Date of Patent: August 18, 2009
    Assignee: Schunk GmbH & Co. KG Spann- und Greiftechnik
    Inventors: Stefan Kerpe, Andreas Schuster, Bruno Fellhauer, Andreas Stanicki
  • Publication number: 20090007774
    Abstract: A piston (16) comprising a shaft (60), a head (62) and a transition corner (64) therebetween. The piston (16) can be formed from a two-piece blank with an inertia-welded interface (36) joining the pieces. The interface (36) does not intersect the transitional corner (64) and is instead positioned radially outward therefrom.
    Type: Application
    Filed: July 2, 2008
    Publication date: January 8, 2009
    Inventors: Terence Savas, Glenn Zwicker
  • Patent number: 7357066
    Abstract: The disclosed sealing structure is used with a piston assembly which exhausts a content. A sealing washer has a sealing hole through which a screw pillar is inserted and is configured to be formed between a piston and a screw cap of the piston assembly. The sealing washer is configured to seal a chink that is generated between threads of the screw pillar at an exhausting of the content when the piston assembly is removed by the screw pillar. The sealing washer has an elasticity such that any space between the sealing hole and the threads of the screw pillar is closed at the exhausting of the content.
    Type: Grant
    Filed: September 30, 2003
    Date of Patent: April 15, 2008
    Inventor: Sung Ill Kang
  • Patent number: 7267044
    Abstract: A manually and/or fluid-pressure operated rotary actuator is coupled with a power screw in a compact assembly to produce large linear thrust. The actuator is operated in both directions by fluid pressure or in one direction by fluid pressure and in the other by spring energy, or by fluid pressure alone or in combination with manually applied force. The actuator has a cylindrical housing, a cylindrical reaction member inside of the housing, a cylindrical piston partially covering the reaction member, a cylindrical rotor partially covering the piston, a device forcing rotation of the piston when moving axially with respect to the reaction member and/or rotor, a plunger engaged with the rotor and restrained from turning with respect to the housing, a base through which the plunger extends, a spring connected to the rotor and housing, a two port assembly, and a handle affixed to the reaction member for manual operation.
    Type: Grant
    Filed: February 16, 2006
    Date of Patent: September 11, 2007
    Inventor: John Hamilton Klinger
  • Patent number: 6966249
    Abstract: A rotary actuator including a tube. A piston disposed in the tube and configured for displacement there along. The piston having a spline extending radially outwardly therefrom formed by plurality of grooves and a plurality of non-grooved portions. At least some of the non-grooved portions of the spume defining a passageway extending radially inwardly through a side of the piston. An axle rod disposed in the piston and having a second spline. A set of pins each positioned through a passageway through the piston to engage the second spline.
    Type: Grant
    Filed: June 24, 2003
    Date of Patent: November 22, 2005
    Assignee: Dongyang Mechatronics Co., Ltd.
    Inventors: Jae Gyun Lee, Ja Bong Jin
  • Patent number: 6474214
    Abstract: A three-position stop type swing actuator has a main piston freely moving in forward and backward directions in an axial direction within a casing, an output shaft placed at a coaxial position with the main piston in such a manner as to be fixed in an axial direction and freely rotate around an axis, a conversion and transmission mechanism converting a forward and backward motion of the main piston into a rotating and swinging motion of the output shaft, and a sub piston having a stroke smaller than that of the main piston a fluid pressure operating force larger than that of the main piston and arranged within the casing in such a manner as to freely move in the forward and backward directions and be capable of being brought into contact with the main piston so as to restrict a middle stop position of the main piston.
    Type: Grant
    Filed: March 16, 2001
    Date of Patent: November 5, 2002
    Assignee: SMC Corporation
    Inventors: Kiyoshi Takeuchi, Yoshihiro Takeda, Mitsunori Magaribuchi
  • Patent number: 6401671
    Abstract: A reciprocating piston rotary internal combustion engine; comprising a non-rotating circular cylinder engine block containing a rotor on which piston reciprocate at right angles to the direction of centrifugal force, and parallel with the rotor, and at right angles to the direction of rotation of the rotor. These pistons form three sides of the combustion chamber and the combustion chamber ignition blocks, which are built on the rotor along with rotor form two more sides, finally the cylinder forms the sixth side. Compression and decompression is affected by cams on front and back plates guiding pistons by means of cam followers built into the pistons. By altering cams one can produce variable delays (pauses) between the strokes of the combustion cycle or change the number of strokes in a given combustion cycle. The rotor can have the blanks recessed to allow for counterbalances to be inserted, and pistons can have guide rails added to take the counterbalances.
    Type: Grant
    Filed: December 5, 2000
    Date of Patent: June 11, 2002
    Inventor: Malcolm Leathwaite
  • Patent number: 6269642
    Abstract: A variable geometry turbocharger employs multiple vanes in the turbine inlet with a unison ring and integral cast wall in the turbine housing forming the nozzle walls. The unison ring incorporates actuation slots receiving tabs on the vanes for opening the closing the nozzle area upon rotation of the unison ring. An integral electrohydraulic actuator rotates the unison ring through a rack and pinion driven crank shaft with direct position feedback to the spring biased variable current solenoid via a cam on the crank shaft.
    Type: Grant
    Filed: September 30, 1999
    Date of Patent: August 7, 2001
    Assignee: AlliedSignal Inc.
    Inventors: Steven Don Arnold, Steven P. Martin, Kevin Slupski, Voytek Kanigowski
  • Patent number: 6247390
    Abstract: A rotary actuator that can be used in conjunction with drive stabilizers for motor vehicles. The rotary actuator includes an outer body forming a gas-tight connection for a first element capable of being turned opposite from a second element, and an inner body coaxial with the outer body and covered by the outer body axially over a full length of the inner body. The inner body and the outer body define an annular space and turn axially in opposite directions, the inner body forming a gas-tight connection for a second element. A sleeve is disposed in the annular space and includes an annular piston and a bushing axially connected to the annular piston, the annular piston moving on cylindrical surfaces of the inner body and the outer body. The annular piston defines two working chambers capable of being acted upon by pressure. The bushing includes oppositely-angles helical teeth on a radially inner on radial inner and outer sides which engage on the inner body and the outer body.
    Type: Grant
    Filed: April 6, 1999
    Date of Patent: June 19, 2001
    Assignee: DaimlerChrysler AG
    Inventors: Werner Busch, Jörg Rösener, Wolfgang Speier, Thomas Szell
  • Patent number: 6212889
    Abstract: A axial to rotational motion actuator employs two sets of engaged helical splines on rotational collars provides a large degree of rotary actuation from a relatively short axial stroke to provides efficient non-binding and reduced effort actuator operation. This improved actuation movement makes the actuator assembly both more responsive to a hydraulic activating means, i.e., oil pressure, and enables packaging the actuator assembly in a compact size to optimize available space around a turbocharger and inside of an engine compartment.
    Type: Grant
    Filed: September 23, 1999
    Date of Patent: April 10, 2001
    Assignee: AlliedSignal Inc.
    Inventor: Steven P. Martin
  • Patent number: 6145429
    Abstract: A rotor assembly for a rotary power device consists of two opposed rotor sections which when assembled in the stator of the device have limited movement parallel to the axis of rotation of the rotor assembly. Each rotor section includes through running cylinders and a center passage for a drive shaft when the sections are assembled. Each rotor section defines inwardly extending support legs and a rear face which act to limit the travel of the rotor sections towards one another. The number of support legs is equal to one half of the number of cylinders in the rotor assembly. The base of the support legs includes a socket which is aligned with a socket in the rear face of the opposing rotor section. A guide pin and spring are disposed in the socket of the support leg and the guide pin extends from the socket into the rear face socket when the rotor sections are assembled.
    Type: Grant
    Filed: March 8, 1999
    Date of Patent: November 14, 2000
    Inventor: Eddie Paul
  • Patent number: 5992222
    Abstract: A pump system for producing high and exactly controllable pressure levels includes a piston pump which has a piston (32) connecting to a spindle shaft (22), a spindle nut (44) on said spindle shaft, a cylinder block (34) having a bore (36) for receiving said piston, a mechanism (14, 16, 26) for imparting relative rotational and axial motions between said piston and said cylinder block including a device for causing relative rotary motion of said spindle and spindle nut. A helical spring (46) or other resilient element is connected between said cylinder block (34) and said spindle nut (44) to compensate the reaction force generated by a pressurized fluid sample in said cylinder bore (36) when put under compresion. A flexible element (30) is connected between the piston (32) and the spindle shaft (22) to compensate for any axial misalignment of the piston and the cylinder bore. Methods for operating such a system under adiabatic, isothermal, isobaric and isochoric conditions are described. (FIG. 3).
    Type: Grant
    Filed: July 15, 1996
    Date of Patent: November 30, 1999
    Assignee: UHP Corp.
    Inventors: Vladimir Belonenko, Eugenij Bunau, Theodor Funck, Vijcheslav Nikolashev
  • Patent number: 5918530
    Abstract: A hydraulic torque motor comprising a cylindrical housing (1), a piston (30) which can only be moved axially in the housing (1) and a rotor (20) which can only be rotated and which extends through the piston (39). The rotor (20) has a spiral groove (21) and the piston (30) has an engagement element (39) which extends radially inward in the groove (21). The piston (30) has a cylindrical section (31), each end of which has a circular end flange (34, 35), which abuts sealingly and slidingly against the housing's (1) boring. The housing (1) has a center flange (5) which projects radially inwards between the end flanges (34, 35) and is arranged to abut slidingly against the cylindrical piston section (31). The end flanges (34, 35) and the center flange (5) and those sections of the housing's (1) boring which are located between the flanged (5, 34, 35) define two cylinder spaces (37, 38).
    Type: Grant
    Filed: August 6, 1997
    Date of Patent: July 6, 1999
    Assignee: Scana Skarpenord AS
    Inventors: Fred Kanton, .O slashed.ystein Klonteig
  • Patent number: 5899112
    Abstract: A rotary/linear converter comprising a reciprocator having a main axis (A) and being adapted for reciprocating movement in the direction of the main axis (A) and a rotator adapted for rotating movement about the main axis (A), the converter further including converter means which operatively interconnects the reciprocator and the rotator. The converter means includes a control link having one end portion thereof pivotally connected to another part of the converter means and the other end portion pivotally connected to a mounting, the link being adapted to pivotally oscillate about the mounting in response to movement of one of said either the rotator or the reciprocator thereby causing movement of the other.
    Type: Grant
    Filed: November 27, 1996
    Date of Patent: May 4, 1999
    Assignee: Richter Technology Limited
    Inventor: Paul Anthony Richter
  • Patent number: 5803031
    Abstract: A hydraulic actuator including a piston connected to a camshaft. First and second passages extend through the camshaft. The piston is actuated in accordance with differences in pressure applied to the piston through the passages. A bearing rotatably supports the camshaft. The first and second passages open at the circumferential surface of the camshaft. First and second grooves are defined in the bearing and arranged at different positions with respect to the axial and circumferential directions of the camshaft. The first and second grooves are communicated with the first and second passages such that the grooves form substantially sealed hydraulic passages for carrying hydraulic fluid to or from the passages while the camshaft rotates.
    Type: Grant
    Filed: July 1, 1997
    Date of Patent: September 8, 1998
    Assignee: Toyota Jidosha Kabushiki Kaisha
    Inventor: Yoshihito Moriya
  • Patent number: 5671652
    Abstract: A fluid powered rotary actuator having a body with first and second ends. The body has a generally cylindrical interior sidewall with a grooved, inwardly facing circumferential portion. The body is adapted for coupling to a first external member. A drive member extends generally coaxially within the body and is supported for rotation relative thereto. The drive member has an end flange positioned toward the body first end adapted for coupling to a second external member, and a shaft rigidly attached to the end flange. The shaft has a grooved, outwardly facing circumferential sidewall portion positioned within the body toward the body second end and a smooth, outwardly facing circumferential sidewall portion positioned within the body between the end flange and the shaft groove sidewall portion.
    Type: Grant
    Filed: August 20, 1996
    Date of Patent: September 30, 1997
    Assignee: 1994 Weyer Family Limited Partnership
    Inventor: Dean R. Weyer
  • Patent number: 5634390
    Abstract: Disclosed is a rotary actuator utilizing magnetic screws which are stably rotatable at a great torque with little torque variation. The rotary actuator comprising (a) a closed hollow cylinder, a piston sliding within the cylinder, and a rotary shaft which rotates with the sliding of the piston, has (b) a first magnetic screw member which makes a linear motion in synchronism with the sliding of the piston, and is provided with a first spiral magnetized band, and (c) a rotary shaft rotatably supported in relation to the first magnetic screw member, and having a second magnetic screw provided with a second spiral magnetized band. (d) With the sliding of the piston, the second magnetic screw receives the magnetic force from the first magnetic screw to thereby rotate the rotating shaft.
    Type: Grant
    Filed: October 25, 1995
    Date of Patent: June 3, 1997
    Assignee: CKD Corporation
    Inventors: Terumasa Takeuchi, Yoshinori Nozawa, Daizyu Maki, Yasuhiro Yoshida, Tadashi Endo, Keiichi Inaba
  • Patent number: 5609090
    Abstract: A fluid-powered rotary actuator for providing rotary movement between first and second external members. The actuator includes a cylindrical body with first and second ends. The body is adapted for coupling to the first external member, and a shaft extending generally coaxially within the body and supported for rotation relative thereto. The shaft having an adjustable end limit of rotation relative to the body. The shaft has an end portion adapted for coupling to the second external member to provide rotational movement between the first and second external members. An annular body insert is positioned coaxial with the body and at least partially within the body at the body first end. The body insert is formed as a separate part from the body and is adjustably rotatable relative to the body to permit adjustment of the end limit of rotation of the shaft relative to the body. The body insert is restrained by the body against axial movement relative to the body during powered operation of the actuator.
    Type: Grant
    Filed: October 16, 1995
    Date of Patent: March 11, 1997
    Assignee: 1994 Weyer Family Limited Partnership
    Inventor: Paul P. Weyer
  • Patent number: 5590580
    Abstract: A load positioning apparatus comprises a rodless cylinder which comprises a piston and a load-mounting table connected together by a coupling device, a feed screw turned and driven by an electric motor, and a pressurized fluid control and supply device. The coupling device mechanically and directly connects the piston and table. The feed screw disposed to pass through the piston in the rodless cylinder is connected to the piston with a screw coupling mechanism.
    Type: Grant
    Filed: February 2, 1995
    Date of Patent: January 7, 1997
    Assignee: SMC Corporation
    Inventor: Shigekazu Nagai
  • Patent number: 5549013
    Abstract: A stepping actuator which is simple and compact in construction, and capable of converting rectilinear reciprocating motions into stepwise rotations of a predetermined stepping angle suitable for application of limited or limitless stepping rotations in one direction or in both forward and reverse directions.
    Type: Grant
    Filed: November 2, 1995
    Date of Patent: August 27, 1996
    Assignee: Three-D Composites Research Corporation
    Inventor: Masahiko Kimbara
  • Patent number: 5485760
    Abstract: A ball nut and screw assembly with a screw having exterior helical ball carrying groove portions separated by land portions and a co-axial nut having complemental, helical interior ball carrying groove portions separated by land portions with the same lead as said screw groove and land portions has, an end attachment for the nut with a reduced diameter sleeve extending axially therefrom. The sleeve has helical exterior thread portions, of the same lead as the nut groove portions, which are of a matching configuration and are threaded into one end of the nut. The sleeve has an interior diameter which receives and passes the screw without interacting with the screw. A recirculating train of load bearing balls is accommodated within nut and screw groove portions which are axially spaced from the sleeve.
    Type: Grant
    Filed: May 10, 1994
    Date of Patent: January 23, 1996
    Assignee: Thomson Saginaw Ball Screw Company, Inc.
    Inventor: David A. Lange
  • Patent number: 5477772
    Abstract: A fluid-powered rotary actuator for providing rotary movement between first and second external members. The actuator includes a cylindrical body with first and second ends. The body is adapted for coupling to the first external member, and a shaft extending generally coaxially within the body and supported for rotation relative thereto. The shaft having an adjustable end limit of rotation relative to the body. The shaft has an end portion adapted for coupling to the second external member to provide rotational movement between the first and second external members. An annular body insert is positioned coaxial with the body and at least partially within the body at the body first end. The body insert is formed as a separate part from the body and is adjustably rotatable relative to the body to permit adjustment of the end limit of rotation of the shaft relative to the body. The body insert is restrained by the body against axial movement relative to the body during powered operation of the actuator.
    Type: Grant
    Filed: February 14, 1995
    Date of Patent: December 26, 1995
    Inventor: Paul P. Weyer
  • Patent number: 5447095
    Abstract: A fluid-powered rotary actuator having a body with a cylindrical interior sidewall portion. A drive shaft extends generally coaxially within the body and is supported for rotation relative thereto. The shaft has a grooved, outwardly facing circumferential sidewall portion positioned within the body. A ring gear is positioned generally coaxially within the body and extends about the shaft with an annular space therebetween. The ring gear has a grooved, inwardly facing circumferential sidewall portion. The ring gear is formed as a separate part from the body and the ring gear grooved sidewall portion is formed prior to positioning of the ring gear in the body. The ring gear is fixedly attached to the body to prevent rotation therebetween by a weld between the ring gear and the body interior sidewall portion. A stop member is engaged by the ring gear. The stop member is axially located within the body to limit movement of the ring gear toward the body first end during assembly of the ring gear in the body.
    Type: Grant
    Filed: July 18, 1994
    Date of Patent: September 5, 1995
    Inventor: Paul P. Weyer
  • Patent number: 5309816
    Abstract: A fluid-powered rotary actuator having a body adapted for coupling to a movable member to transfer rotational force thereto. A drive member includes a flange extending axially outward from a body first end, and a stub shaft extending coaxially within the body toward a body second end. The flange includes first, second and intermediate portions, with the first portion axially outward of the second portion. The second portion has a ball race, the first portion is threaded, and the intermediate portion has straight splines formed thereon. The drive member has an elongated aperture, and first and second fluid conduits formed therein. A fluid-transfer tube is carried by a piston and extends into the central aperture. Pressurized fluid applied to a flange first port is communicated through the first fluid conduit to a first piston side, and pressurized fluid applied to a flange second port is communicated through the second fluid conduit via the transfer tube to a second piston side.
    Type: Grant
    Filed: April 27, 1993
    Date of Patent: May 10, 1994
    Inventor: Paul P. Weyer
  • Patent number: 5267504
    Abstract: A fluid-powered rotary actuator attachable to a boom and usable with a work implement having two hydraulic actuators. The rotary actuator has a body with a drive shaft extending longitudinally therewithin. The shaft has one end located outward of the body and fixed to an attachment flange which can be connected to a vehicle boom. An annular fluid coupling is rotatably mounted on the shaft between the flange and the body. Fluid passageways in the shaft conduct fluid to the coupling, which has three circumferential fluid distribution channels. The coupler provides the fluid to flexible hoses which extend to the hydraulic actuators. The coupling is freely rotatable relative to the shaft but has a connection finger attached thereto which is received in a hole in a connection flange which is attached to the body.
    Type: Grant
    Filed: March 20, 1992
    Date of Patent: December 7, 1993
    Inventor: Paul P. Weyer
  • Patent number: 5253726
    Abstract: A steering assembly for a utility vehicle having a support frame. The assembly includes a fluid-powered rotary actuator, with a body having a rotatable hollow shaft extending therewithin. An annular piston is mounted within the body about the shaft for reciprocal axial movement and rollers are provided for transmitting torque between the body and the shaft to produce rotational movement of the shaft in response to axial movement of the piston. An axially extendable member extends longitudinally within a central bore of the shaft with a lower end portion projecting out of the body and being attached to forks to which a wheel is rotatably mounted. The central bore of the shaft and the extendable member have meshing straight splines which transmit the rotational drive of the shaft to the extendable member, while allowing free axial movement of the extendable member. The extendable member has a piston portion which defines an interior fluid chamber. An accumulator is in fluid communication with the fluid chamber.
    Type: Grant
    Filed: May 15, 1992
    Date of Patent: October 19, 1993
    Inventor: Paul P. Weyer
  • Patent number: 5241895
    Abstract: An air-powered actuator having a body with first and second ends, an axially transverse annular bulkhead positioned therebetween, and an output shaft with a splined exterior portion. The body includes first and second end walls with each end wall having a sleeve mounted coaxially within the body about the shaft and projecting axially inward within the body. A piston sleeve is disposed for axial reciprocating movement within the body. The piston sleeve has a pair of piston heads, an outer sleeve, and an inner sleeve. The outer sleeve is mounted coaxially within the body inward of the bulkhead and about the first and second sleeves to define therewith a fluid-tight outer chamber containing the piston heads, each positioned to an opposite side of the bulkhead to define four fluid-tight chambers and to which pressurized air is applied. Also defined is a fluid-tight inner chamber containing lubricating oil. The outer sleeve is attached to the piston heads for reciprocating travel therewith.
    Type: Grant
    Filed: November 13, 1992
    Date of Patent: September 7, 1993
    Inventor: Paul P. Weyer
  • Patent number: 5184537
    Abstract: A clamp device drive apparatus for driving a clamp device engaged with a T-shaped groove slidably between a clamping position and an unclamping position, comprises a push-pull chain connected to a clamp device, a vertical housing for containing the chain, guide members for turning a running course of the chain, a sprocket engaged with the chain, and a cylinder drive type motor for driving the sprocket to rotate, and the motor is constituted to drive the sprocket with a double acting fluid cylinder or a pair of single acting fluid cylinder, through ball screw mechanism for converting driving force into driving torque.
    Type: Grant
    Filed: March 27, 1992
    Date of Patent: February 9, 1993
    Assignee: AIOI Seiki, Inc.
    Inventors: Seiji Kimura, Kouji Wada
  • Patent number: 5161491
    Abstract: An internal combustion engine which includes a system to deliver a combustible mixture to a cylinder, ignite the combustible mixture and exhaust the mixture after ignition. The internal combustion engine comprises at least one piston capable of reciprocating within the cylinder, each piston having an interior cylindrical surface and a continuous, wave-shaped groove recessed into the interior cylindrical surface. A rotatable crankshaft passes concentrically through the cylinder and through the piston. At least one crank member extends radially from the crankshaft and is received in the wave-shaped groove. The piston is prevented from rotating while being allowed to reciprocate so that the force of combustion causes movement of the piston thereby causing rotation of the crank member and rotation of the crankshaft.
    Type: Grant
    Filed: June 19, 1990
    Date of Patent: November 10, 1992
    Inventor: John G. Graves
  • Patent number: 5054372
    Abstract: A fluid-powered rotary actuator having a body with first and second ends, and a shaft extending generally coaxially within the body. The shaft is supported for rotational movement relative to the body by bearing races formed on the shaft first and second end portions and corresponding bearing races formed on a pair of first and second end caps. First and second stop rings are disposed within the body, each adjacent to a corresponding end cap, with the shaft extending therethrough. The stop rings are each freely and longitudinally movable on the shaft within a limited axial range. The stop rings are positioned using set screws which extend through the end caps and engage the stop rings at selected longitudinal positions within their limited axial ranges. When the first and second stop rings are positioned, they engage and limit axial travel of the piston sleeve toward the end caps, and hence provide preselected and adjustable and rotational limits for the rotational travel of the shaft.
    Type: Grant
    Filed: February 13, 1991
    Date of Patent: October 8, 1991
    Inventor: Paul P. Weyer
  • Patent number: 5046402
    Abstract: The device serves to convert rotary motion to hydraulic pressure and vice versa. A piston assembly is entirely located within a cylinder, including a piston head and a piston stem fixed to the piston head. The piston assembly divides the cylinder into two distinct variable volume chambers to be filled with a fluid. The piston assembly is prevented from rotating relative to the cylinder. A rotary shaft extends through one closed end of the cylinder and has an inner portion in telescopic and threaded engagement with the piston stem. Two fluid ports communicate with the respective chambers for allowing a fluid to alternatively exit from and enter into the chambers. Rotation of the shaft causes longitudinal displacement of the piston assembly relative to the cylinder or vice versa. The device can have different applications: for instance, if a throttle valve is connected across the two ports, controlled braking of the shaft rotated by an external torque, is obtained.
    Type: Grant
    Filed: April 23, 1990
    Date of Patent: September 10, 1991
    Inventor: Jean-Hugues Lagace
  • Patent number: 5038672
    Abstract: The apparatus includes a steeped axially displaceable piston in a stepped cylinder housing, and a rotary shaft is axial fixed relative to the housing and extends into the piston reduced diameter end portion. The piston reduced diameter portion and the housing having a cooperating set of first teeth while the piston and shaft have a cooperating set of second teeth whereby at least one set of the teeth serve to convert axial movement of the piston into rotary motion of the shaft. The shaft is supported in the housing adjacent where it exits from the housing by a first bearing while a second bearing is provide radial adjacent to the juncture of the housing enlarged and reduced diameter portions that supports the interior end portion of the shaft in the piston reduced diameter portion. A third radial bearing is provided between the enlarged diametric portion and the piston enlarged diametric portion in axial remote relationship to the first bearing.
    Type: Grant
    Filed: March 20, 1990
    Date of Patent: August 13, 1991
    Assignee: Danfoss A/S
    Inventor: Hans K. Beuschau
  • Patent number: 5028217
    Abstract: An apparatus for converting rotational movement into reciprocating lifting movement or vice versa, compriss a bearing body that incorporates a first, cylindrical wall section with first guide grooves, a rotary element that is supported on the bearing body so as to be able to rotate and that incorporates a second cylindrical wall section with second guide grooves that are arranged at an angle to the first guide grooves, a lifting element that is supported on the bearing body so as to move back and forth and that incorporates a third wall section, in which continuous bearing drillings with axes that are transverse to the lifting movement are arranged, and a force transfer system with driver balls that are guided within the bearing drillings. In each bearing drilling there are two driver balls that lie one behind the other in the axial direction and which rest against each other. One such driver ball is supported in part in the first guide groove and the other is supported in part in the second guide groove.
    Type: Grant
    Filed: August 31, 1990
    Date of Patent: July 2, 1991
    Inventor: Franz-Georg Miller