Tool Movement Dampening Patents (Class 267/137)
  • Patent number: 10571889
    Abstract: A workpiece having at least one physical feature is placed into a workstation fixture having at least one adjustable locator. Measurement data reflecting the position of the at least one physical feature of the workpiece and measurement data reflecting the position of the at least one adjustable locator are obtained. A processor ingests and utilizes the collection of assembly data and the measurement data to define and store in memory at least one ordered pair correlating the physical feature and the adjustable locator. The processor defines a test vector that connects the position of the at least one physical feature and the position of the at least one adjustable locator. The processor to computationally discovers a best fit for adjusting the position of the adjustable locator to register with the physical feature by applying to the test vector a computational optimization process that seeks to minimize the length of the test vector to thereby generate a digital shim vector.
    Type: Grant
    Filed: October 5, 2018
    Date of Patent: February 25, 2020
    Assignee: ProcessChamp, LLC
    Inventor: George K. Ghanem
  • Patent number: 9027720
    Abstract: A vibration damping mechanism allows increase of an absorption amount of vibration energy, with less possibilities of increase in the manufacture cost of a vibration damping weight and of reduction in the strength of a shaft section. Within a cylindrical hollow portion formed inside the shaft section, there are accommodated a plurality of weight members divided from each other along the circumferential direction about the axis of the hollow portion. An urging member is provided for urging the weight members toward the axis such that dividing faces of adjacent weight members are brought into surface contact with each other.
    Type: Grant
    Filed: July 14, 2011
    Date of Patent: May 12, 2015
    Assignee: Daishowa Seiki Kabushiki Kaisha
    Inventor: Tatsuya Ogata
  • Patent number: 9016672
    Abstract: The present invention concerns a handheld working tool comprising a motor part (10), a handle part (20) comprising a handle grip (21), and at least one first type antivibration element (30) arranged between said motor part (10) and said handle part (20), and which element (30) is adapted to isolate the handle part (20) from vibrations in the motor part (10). The working tool (1) is characterized in that it further comprises at least one second type antivibration element (40) arranged adjacent to the first type antivibration element (30). The at least one second type antivibration element (40) is adapted to, when in an active state, prevent vibrations in the motor part (10) from being transferred to the handle grip (21). The second antivibration element (40) is in the active state when the handle grip (21) is loaded during operation of the working tool (1).
    Type: Grant
    Filed: October 23, 2009
    Date of Patent: April 28, 2015
    Assignee: Husqvarna AB
    Inventors: Thomas Englund, Pär Martinsson
  • Patent number: 8925892
    Abstract: The invention relates to a support device for the gun sight of a military vehicle, incorporating a head to which the gun sight is fastened and a foot which is integral with the vehicle, the head being integral with a column with a vertical axis which is introduced into the foot, the column being made integral with the foot by spring means wherein the spring means are constituted in the form of tongues arranged along at least two parallel planes perpendicular to the vertical axis of the support, each plane incorporating at least three tongues evenly spaced angularly around the column and integral with it by a first end and integral with the foot by their second end, these spring means imparting stiffness to the link between the column and the foot that is less along the vertical axis than along the other directions (X, Y) orthogonal to this vertical axis.
    Type: Grant
    Filed: November 16, 2011
    Date of Patent: January 6, 2015
    Assignee: Nexter Systems
    Inventor: Olivier Germenot
  • Patent number: 8863382
    Abstract: A wind turbine rotor blade and a wind turbine incorporating the rotor blade include a first and second composite skin. A first and a second spar pultrusion having a base and a plurality of integral ribs generally normal to base are attached to the inside surface of the first and second composite skins and extend the span of the rotor blade. At least one shear web connects a rib of the first spar pultrusion to a corresponding rib of the second spar pultrusion. The width of the spar pultrusions decreases in a step-wise fashion along the span of the rotor blade from the root to the tip. The leading or trailing edge of the rotor blade may be selectably opened for inspection and repair.
    Type: Grant
    Filed: January 24, 2012
    Date of Patent: October 21, 2014
    Assignee: Piasecki Aircraft Corp.
    Inventor: Frederick W Piasecki
  • Patent number: 8820496
    Abstract: A damper includes at least one substantially longitudinal damping body with two end surfaces and one substantially longitudinal surface between. The damping body is placed in a substantially longitudinal cavity, which includes a cavity surface, with a damping fluid that includes a liquid and a gas. At least one of the cavity surface, end surfaces or longitudinal surface is broken, and the damping body can pulsate in the cavity when the damper is in operation.
    Type: Grant
    Filed: September 5, 2007
    Date of Patent: September 2, 2014
    Assignee: Teeness ASA
    Inventors: Anders Digernes, Arne Martin Nordmark, Roger Olsen
  • Patent number: 8752811
    Abstract: A tuned mass damper is designed for a machine tool head that moves in the X, Y, and Z directions and rotates around a C-axis that is coincident with the axis of an arm that supports the head. The damper comprises a pair of damper masses symmetrically arranged around the head. Each damper mass has a center of gravity which is approximately in the geometric center of the mass. A resilient mounting is provided for each of the damper masses allowing the damper masses to damp out vibration in the X and Y directions regardless of the orientation of the head.
    Type: Grant
    Filed: November 11, 2011
    Date of Patent: June 17, 2014
    Assignee: Fives Machining Systems, Inc.
    Inventor: Peter L. Mischler
  • Publication number: 20140105701
    Abstract: An anti-vibration member is provided which includes a member main body having rubber elasticity or viscoelasticity and can be mounted on an outer surface of a tool main body by a frictional force against the outer surface.
    Type: Application
    Filed: July 13, 2012
    Publication date: April 17, 2014
    Inventors: Kazuya Matano, Rimpei Kawashita
  • Patent number: 8672305
    Abstract: A work apparatus has at least one handle (12) and a drive motor (3). The handle (12) is connected to said drive motor (3) via at least one anti-vibration element (16, 17, 18, 19, 20). The anti-vibration element (18, 19) is held on a first housing part and coacts with a second housing part. To achieve good damping, the anti-vibration element (19) includes a damping section (25) having an annularly-shaped wall (37) which expands in the direction of the second housing part.
    Type: Grant
    Filed: September 24, 2010
    Date of Patent: March 18, 2014
    Assignee: Andrea Stihl AG & Co. AG
    Inventors: Günter Wolf, Johannes Menzel, Ralf Steidinger, Andreas Guip, Maximilian Eberhardt
  • Patent number: 8550440
    Abstract: A mechanism to act as a buffer, the mechanism includes a base seat defining a chamber and a bottom hole communicating with the chamber; a connecting shaft received in the chamber and extending through the bottom hole, the connecting shaft including a blocking portion for preventing detachment from the base seat, the connecting shaft axially defining a receiving hole and a plurality of mounting holes communicating with the receiving hole; a guiding rod fixed to the base seat, one end of the guiding rod extending out of the base seat and an inserting portion at the other end, the inserting portion including an abutting surface tapered toward the distal end; a buffer sleeved on the connecting shaft; a plurality of rolling bodies in the mounting holes and providing resistance between the abutting surface and the buffer; and a resilient member between the guiding rod and the blocking portion.
    Type: Grant
    Filed: May 23, 2011
    Date of Patent: October 8, 2013
    Assignees: Hong Fu Jin Precision Industry (ShenZhen) Co., Ltd., Hon Hai Precision Industry Co., Ltd.
    Inventor: Dong-Wei Gao
  • Patent number: 8342541
    Abstract: The invention relates to a vehicle comprising a vehicle component moveable in an oscillating manner with respect to a first vehicle component, and a first measuring means for measuring at least one acceleration measuring value of said first vehicle component with respect to a ground surface, wherein a calculating means is provided for determining an optimum acceleration value of said second vehicle component to be applied at the moment of the presence of the acceleration measuring value, and at least one actuator arranged between the first and second vehicle components, with control and closed-loop control units, for minimizing a deviation of a real acceleration value of said second vehicle component from the optimum acceleration value by using at least one available spring path.
    Type: Grant
    Filed: December 3, 2008
    Date of Patent: January 1, 2013
    Assignee: Grammer, AG
    Inventors: Christoph Wurmthaler, Alexander Kuehnlein, Erwin Haller, Jens Kolb
  • Publication number: 20120286461
    Abstract: An oscillation reduction system for an electric tool includes a first substance that is arranged on an elastic element. The first substance is configured to reduce housing oscillations by providing a relative motion with respect to a housing of the electric tool. The oscillation reduction system further includes a second substance that can be driven depending on the relative motion of the first substance with respect to the housing. An electric tool includes the oscillation reduction system.
    Type: Application
    Filed: October 7, 2010
    Publication date: November 15, 2012
    Applicant: Robert Bosch GmbH
    Inventor: Willy Braun
  • Patent number: 8256516
    Abstract: A system and a method provide a downhole mechanical energy absorber that protects downhole tools from impact loads and shock loads that occur during run-in contacts, tool drops, perforating blasts, and other impact events. A continuous localized inelastic deformation of a tube is a primary energy absorber in a load limiting design of the downhole mechanical energy absorber.
    Type: Grant
    Filed: May 20, 2009
    Date of Patent: September 4, 2012
    Assignee: Starboard Innovations, LLC
    Inventor: John P. Rodgers
  • Patent number: 8197230
    Abstract: A damper assembly including an input member, an output member, and a transfer assembly is disclosed. The input member is configured to receive a torsional input. The output member is configured to provide a torsional output. The transfer assembly is coupled between the input member and the output member and includes a ring, a first guide, a second guide, a first spring, and a second spring. The ring defines a first linear slide path that has a first end and a second end, and a second linear slide path that has a third end and a fourth end. The first guide is slideable within the first linear slide path and coupled to the input member. The second guide is slideable within the second linear slide path and coupled to the input member. The first spring is positioned between the first guide and the second end of the first linear slide path. The second spring is positioned between the second guide and the fourth end of the second linear slide path.
    Type: Grant
    Filed: December 3, 2008
    Date of Patent: June 12, 2012
    Assignee: Caterpillar Inc.
    Inventors: William L. Schell, Thomas A. Brosowske, Paul F. Olsen, Thomas L. Atwell
  • Patent number: 8181715
    Abstract: A power tool according to the invention includes a dynamic vibration reducer having a body, a weight and elastic elements. The body is formed by a plurality of cylindrical members which are coaxially disposed to face each other. The elastic elements exert biasing forces on the cylindrical members such that the cylindrical members are held apart from each other. The cylindrical members are fixed to the tool body side under the biasing forces of the elastic elements. Venting members for forced vibration are provided on the cylindrical members and protrude radially outward from the cylindrical members, respectively. The venting members are mounted by inserting into venting member mounting parts on the tool body side in a direction transverse to the longitudinal direction of the cylindrical members. At least one of the venting members can move with respect to the cylindrical member in the longitudinal direction.
    Type: Grant
    Filed: November 30, 2009
    Date of Patent: May 22, 2012
    Assignee: Makita Corporation
    Inventors: Shinya Bito, Takuro Konishi
  • Publication number: 20110291334
    Abstract: A system for damping vibration in a drill string can include a valve assembly having a supply of a fluid, a first member, and a second member capable of moving in relation to first member in response to vibration of the drill bit. The first and second members define a first and a second chamber for holding the fluid. Fluid can flow between the first and second chambers in response to the movement of the second member in relation to the first member. The valve assembly can also include a coil or a valve for varying a resistance of the fluid to flow between the first and second chambers.
    Type: Application
    Filed: August 9, 2011
    Publication date: December 1, 2011
    Applicant: APS Technology, Inc.
    Inventors: Mark Ellsworth Wassell, William Evans Turner, Daniel E. Burgess, Carl Allison Perry
  • Patent number: 7987954
    Abstract: A damper for reducing vibrations present in various portions of small vehicles, other transportation devices and other rolling and/or motorized devices, such as bicycles, motorcycles, lawn mowers, snowblowers and the like, may comprise a resilient member and a weight. The resilient member may mounted to a portion of a device having a surface suitable for engaging and retaining the resilient member therein, and the resilient member may have an inside surface suitable for engaging and retaining the weight.
    Type: Grant
    Filed: June 18, 2004
    Date of Patent: August 2, 2011
    Inventor: Matthew A. McPherson
  • Patent number: 7980536
    Abstract: The invention is a mounting system for a vibrational element. The vibrational element has a longitudinal axis, an outer surface and an axial displacement node. The mounting system includes an isolation member which has an isolation surface, an isolating body, and an engaging portion. The engaging portion is immovably secured to the isolation member and extends radially inward from the isolation body at a point radially opposite the isolation surface. The engaging portion is disposed so as to engage the outer surface of the vibrational element. Radial displacements of the vibration element are substantially decoupled from the isolation surface through the engaging portion.
    Type: Grant
    Filed: August 23, 2006
    Date of Patent: July 19, 2011
    Assignee: 3M Innovative Properties Company
    Inventors: Gopal B. Haregoppa, Satinder K. Nayar, Donald S. Oblak, Ronald W. Gerdes
  • Publication number: 20110024959
    Abstract: A double-acting buffer module includes a sliding member having a front end slidably receiving a pressing shaft and a rear end slidably received in an installing member. Therein, a first elastic member is provided between the pressing shaft and the sliding member while a second elastic member is provided between the sliding member and the installing member so that the pressing shaft and the sliding member perform a two-stage buffer movement in the installing member.
    Type: Application
    Filed: July 31, 2009
    Publication date: February 3, 2011
    Inventors: Wei-Lin Chang, Chi-Pin Chou
  • Publication number: 20100132506
    Abstract: A flexible connection plate is used in a feed drive mechanism. The flexible connection plate has a first portion, a second portion joined to the first portion, and a plurality of elastic grooves between the first portion and the second portion. The first portion and the second portion are fixed to a nut seat and a lead screw nut of the feed drive mechanism respectively. The elastic grooves are axially penetrating the connection plate. Adjacent elastic grooves have an overlapping section respectively, such that the flexible connection plate has a characteristic of elastic deformation in a radial direction, so as to absorb errors resulted from assembly, and improve non-parallelism resulted from the assembly errors, thereby increasing the feed accuracy of the feed drive mechanism. Furthermore, the rigidity of the flexible connection plate in an axial direction is high enough to drive the feed drive mechanism to be positioned precisely.
    Type: Application
    Filed: January 26, 2009
    Publication date: June 3, 2010
    Applicant: INDUSTRIAL TECHNOLOGY RESEARCH INSTITUTE
    Inventors: Shih-Chang CHEN, Tzuo-Liang Luo
  • Patent number: 7721818
    Abstract: A power tool includes: a power tool main body; a handle holder protruding from the power tool main body; a handle extending in a protruding direction of the handle holder and having an arm portion engaging the handle holder; and an elastic body carried between the power tool main body and the handle. The handle holder has a spherical convex outer circumferential face. The arm portion surrounds the handle holder and has a spherical concave inner circumferential face. The convex outer circumferential face of the handle holder is inserted and fitted into the concave inner circumferential face. The elastic body is carried between the power tool main body and the handle around the outer circumference of the handle holder in a radial direction vertical to a protruding-direction central axis of the handle holder.
    Type: Grant
    Filed: October 28, 2005
    Date of Patent: May 25, 2010
    Assignee: Hitachi Koki Co., Ltd.
    Inventors: Hiroto Inagawa, Shinki Ohtsu, Kenji Kobori, Tetsuo Ebata
  • Patent number: 7681869
    Abstract: The present invention concerns a damping apparatus for the damping of vibrations in tool holders, machine elements and work pieces in machine tools and in other objects that are exposed to unwanted vibrations. The damping apparatus is adapted to be provided in or on the object and includes a substantially cylindrically shaped damping body with a boring going there through and a longitudinal central body that is rigidly connectable to the object that is to be damped. The damping body is connected to the longitudinal central body through elastic elements. The connection is made such that the elastic elements are substantially exposed to shear forces during damping.
    Type: Grant
    Filed: April 14, 2003
    Date of Patent: March 23, 2010
    Assignee: Teeness ASA
    Inventor: Anders Digernes
  • Publication number: 20090321607
    Abstract: A mounting system for supporting a power system is disclosed. The mounting system may have a support structure including a first end spaced from a second end of the support structure. The mounting system may further have a first mounting assembly attached near the first end of the support structure. The first mounting assembly may have a first mounting support and a second mounting support for supporting the support structure, each of the first mounting support and the second mounting support attached to the support structure offset to a side of a longitudinal axis. The mounting system may also have a second mounting assembly attached near the second end of the support structure. The second mounting assembly may have a third mounting support attached to the support structure below the longitudinal axis for supporting the support structure. The second mounting assembly may have at least one shock absorber mounted near the third mounting support.
    Type: Application
    Filed: June 30, 2008
    Publication date: December 31, 2009
    Inventors: Peter John Baron, Martin Regis Habel
  • Publication number: 20090278291
    Abstract: A fixing structure of a spindle balancer for a machine tool in which a spindle balancer can be attached easily to a machine tool at an appropriate position in an appropriate posture while being supported stably and surely by the machine tool, safety is enhanced when the spindle balancer is attached to the machine tool by lessening the attaching load, set-up including replenishment of the cylinder body with compression gas and regulation of gas pressure is facilitated, and the attachment time and set-up time of the spindle balancer can be shortened.
    Type: Application
    Filed: August 25, 2006
    Publication date: November 12, 2009
    Applicant: PASCAL ENGINEERING CORPORATION
    Inventor: Ichiro Kitaura
  • Patent number: 7579793
    Abstract: Methods and systems are provided for driving one or more force coils. A system for driving force coils is provided including a PWM drive coupled to a first coil and a linear drive coupled to a second coil. The PWM drive efficiently drives the first coil to apply a first force. The linear drive drives the second coil to apply a second force that is substantially noise-free. The first force is greater than the second force.
    Type: Grant
    Filed: February 14, 2007
    Date of Patent: August 25, 2009
    Assignee: Honeywell International Inc.
    Inventor: James C. Fischer
  • Publication number: 20090072456
    Abstract: Systems and methods for protecting a hardware device from shock loads in a package are disclosed. An example system includes a cover with an orifice at a first end and a closed second end, a cupped spring washer in the cover at the closed second end, a hardware package in the cover on the washer, and a base that, when attached to the cover, loads the washer and hardware package with a desired load.
    Type: Application
    Filed: September 19, 2007
    Publication date: March 19, 2009
    Applicant: Honeywell International Inc.
    Inventors: Todd L. Braman, Dale J. Hagenson, Owen D. Grossman
  • Publication number: 20090039576
    Abstract: An auxiliary handle device, in particular for a hand-held power tool, has an auxiliary handle, a fastening unit provided for attachment with the hand-held power tool, and a damping unit with at least one absorber mass element. The absorber mass element is located at least partially on an end region of the auxiliary handle facing the fastening unit along an axial direction between the auxiliary handle and the fastening unit.
    Type: Application
    Filed: June 3, 2008
    Publication date: February 12, 2009
    Inventors: Roswitha Eicher, Stefan Heess, Joerg Maute, Florian Esenwein, Bernhard Eicher, Marcus Schuller
  • Publication number: 20080315471
    Abstract: A system for damping vibration in a drill string can include a valve assembly having a supply of a fluid, a first member, and a second member capable of moving in relation to first member in response to vibration of the drill bit. The first and second members define a first and a second chamber for holding the fluid. Fluid can flow between the first and second chambers in response to the movement of the second member in relation to the first member. The valve assembly can also include a coil or a valve for varying a resistance of the fluid to flow between the first and second chambers.
    Type: Application
    Filed: April 24, 2008
    Publication date: December 25, 2008
    Applicant: APS Technology, Inc.
    Inventors: Mark Ellsworth Wassell, William Evans Turner, Daniel E. Burgess, Carl Allison Perry
  • Publication number: 20080277846
    Abstract: A hand-held power tool includes an antivibration element (1) for vibrationally decoupling a handle sub-assembly (6) from another sub-assembly (5) that vibrates along a vibration axis (A), and having a coil spring (7) oriented along the vibration axis (A), and a threaded plug (3) provided with an outer thread (4) longitudinally extending therealong, with the coil spring (7) having a plurality of windings (2) extending along a preload region (V) and screwed on the outer thread (4) under an axial compressive preload, and with the outer thread (4) having a between-flight width (Z) greater than a diameter (D) of the spring wire of which the coil spring (7) is formed.
    Type: Application
    Filed: April 21, 2008
    Publication date: November 13, 2008
    Inventor: Franz Moessnang
  • Publication number: 20080245197
    Abstract: Apparatus and methods for dampening vibration of a tool are provided. In one embodiment, a handle portion of a vibrating tool is inserted into a cavity of left and right side parts of a grip which is at least one of made of and lined with a vibration dampening material. The handle portion may be wrapped with a second vibration dampening material prior to being inserted within the grip. The casting of the handle portion of the vibrating tool may be reduced in order to avoid a size increase of the tool when the handle is enclosed within the cavity of the grip. In such manner, the tool may be more ergonomically feasible.
    Type: Application
    Filed: April 3, 2007
    Publication date: October 9, 2008
    Applicant: THE BOEING COMPANY
    Inventors: BRIAN J. MARTINEK, JAMES A. HAMMOND, RALPH D. CZESCHIN
  • Publication number: 20080237379
    Abstract: A coil spring assembly for connection with a separator body to apply a spring force to a grinding roll of a journal assembly to pulverize solid fuel. The coil spring assembly includes: a preload stud having a first end in communication with the journal assembly and an exposed opposite second end extending from the coil spring assembly; a spring adjustment bolt and bearing assembly being fixed relative to the preload stud extending therethrough; and a seal being substantially cylindrical shaped and flexible at least along a central axis thereof.
    Type: Application
    Filed: March 29, 2007
    Publication date: October 2, 2008
    Applicant: Alstom Technology Ltd.
    Inventors: Oliver G. Briggs, Jeffrey A. Case, Melissa Cassidy, Lawrence S. Farris
  • Publication number: 20080179797
    Abstract: An oscillation damper (3) which is designed for being mounted on a housing (2) of a hand-held power tool (1) and includes an oscillating damping mass (4); and at least one spring (5) located completely, with respect to its axial length, within the damping mass (4) for axially compressively preloading the damping mass (4) against the housing (2) of the power tool (1).
    Type: Application
    Filed: January 30, 2008
    Publication date: July 31, 2008
    Inventors: Erwin Manschitz, Franz Mossnang
  • Publication number: 20080164644
    Abstract: A vibration isolation apparatus is provided that includes a main spring and a tuned mass damper. The main spring has a first end and a second end, and is configured to resonate when vibrated within a predetermined frequency range with a first axial surge mode having a magnitude. The tuned mass damper is coupled to the main spring at a first axial position located substantially equidistantly between the main spring first end and the main spring second end and is configured to reduce the first axial surge mode magnitude at least 50% when the main spring is vibrated within the predetermined frequency range. Methods of manufacturing the vibration isolation apparatus are also provided.
    Type: Application
    Filed: January 9, 2007
    Publication date: July 10, 2008
    Inventors: Dale T. Ruebsamen, James H. Boyd, Toren S. Davis, Joseph E. Vecera
  • Patent number: 7370851
    Abstract: A damping system of a glove box using a damper and a wire. The damper is attached to the glove box. An end of the wire is fixed to a fastener on a lower panel. Thereby, when a field problem occurs, the damper is mounted and demounted with ease.
    Type: Grant
    Filed: December 30, 2004
    Date of Patent: May 13, 2008
    Assignee: Hyundai Mobis Co., Ltd.
    Inventor: Kwang-Seob Shin
  • Patent number: 7357380
    Abstract: In order to reduce the formation of inherent vibrations in the coil spring in an anti-vibration element, in particular for a manually operated tool such as a chainsaw, a parting-off grinder or similar device and having a coil spring, an additional mass is positioned on the coil spring.
    Type: Grant
    Filed: June 28, 2004
    Date of Patent: April 15, 2008
    Assignee: Andreas Stihl AG & Co KG
    Inventors: Johannes Menzel, Jens Helge Kutzbach
  • Publication number: 20080066965
    Abstract: Apparatus and methods are described for highly attenuating vibrations of a drillstring assembly while drilling. In one embodiment, vibrations are attenuated by introducing one or more vibration attenuation modules at appropriate assembly locations. For example, vibration attenuation modules may be inserted at locations where vibration energy is expected to be maximal. In one embodiment the vibration attenuation modules include cavities loosely packed with particles of solid material such as sand or metallic powder. In one embodiment, the cavity walls are rough and/or include geometric features that enhance vibration energy transfer to the loosely packed particles in the cavity(ies). The vibration energy is dissipated via friction and inelastic particle-particle and particle-wall collisions that occur as a result of drillstring motion.
    Type: Application
    Filed: September 20, 2006
    Publication date: March 20, 2008
    Applicant: SCHLUMBERGER TECHNOLOGY CORPORATION, Incorporated in the State of Texas
    Inventors: Jahir Alfonso Pabon, Joachim Sihler, Demosthenis Georgeou Pafitis, Chaur-Jian Hsu
  • Publication number: 20080013058
    Abstract: A high performance pneumatic spring apparatus is provided without increasing the sizes of the apparatus. The pneumatic spring apparatuses KB1-KB4 are provided with gas chambers AR filled with a gas at a prescribed pressure. The gas chamber AR is provided with an adjustment apparatus SW for adjusting a temperature change due to the capacity change of the gas chamber AR.
    Type: Application
    Filed: March 1, 2005
    Publication date: January 17, 2008
    Applicant: NIKON CORPORATION
    Inventor: Yosuke Tatsuzaki
  • Patent number: 7306082
    Abstract: A support structure supporting a movable component is provided with a vibration damper in the form of at least one cavity in the structure, the cavity being filled with a composite material; preferably a composite material of about 80% butyl rubber and 20% carbon particles. The composite material is preferably bonded to the cavity walls by adhesive or mechanically coupled by a texture on the cavity walls. The rubber composite may be first moulded then inserted into the cavity or may be injected into the cavity and moulded by the cavity. The cavities may be provided with a vent to facilitate insertion or injection of the composite material.
    Type: Grant
    Filed: April 8, 2003
    Date of Patent: December 11, 2007
    Assignee: ASM Technology Singapore PTE LTD.
    Inventors: Ka Shing Kenny Kwan, Srikanth Narasimalu, Murali Saranagapani, Sathish Kumar Balakrishnan
  • Patent number: 7270320
    Abstract: An antivibration element (1) is especially for a portable handheld work apparatus such as a motor-driven chain saw or a brushcutter. The antivibration element includes a coil spring (2) and at least one guide. An end section (7, 8) of the coil spring (2) is fixed to the guide. In order to provide a progressive characteristic line of the coil spring (2) in a simple way, the coil spring (2) has a transition section (11, 12), which borders at the end section (7, 8) and is guided with play on the guide. When the coil spring is under load, the turns of the transition section come at least in part into contact engagement with a helically-shaped slot in the guide so that the spring stiffness of the antivibration unit increases.
    Type: Grant
    Filed: July 30, 2003
    Date of Patent: September 18, 2007
    Assignee: Andreas Stihl AG & Co. KG
    Inventors: Johannes Menzel, Günter Wolf, Helmut Lux, Jens Kutzbach
  • Patent number: 7264098
    Abstract: A damper for reducing vibrations in a handheld device, tool and/or instrument may comprise a resilient member and a weight. The resilient member may mounted to any portion of a device having a surface suitable for engaging and retaining the resilient member therein, and the resilient member may have an inside surface suitable for engaging and retaining the weight. In some embodiments, additional resilient members may be arranged to engage and retain the weight.
    Type: Grant
    Filed: June 18, 2004
    Date of Patent: September 4, 2007
    Inventor: Mathew A. McPherson
  • Patent number: 7234379
    Abstract: An arrangement for reducing vibrations in a tool holder (4) with a cutting tool (3) and has a vibration sensor on the tool holder (4) that is connected to a guide unit (11). The tool holder (4) has further two piezo-electric actuators 14 and 15. Under the influence of the vibration sensor (9), the guide unit (11) provides an electric alternating current that is actively guided over time so that the actuators movably affect the tool holder (4) to reduce the vibrations in this. To also be able to dampen transients in the tool holder (4) this is movably connected with a passive dampening arrangement that is independent of the guide unit (11) and that is based on the principle of a springing (8) suspended mass (7). The invention also relates to a method for reducing vibrations. The vibrations in the tool holder are sensed and a corresponding signal is provided to a guide unit that over time provides actively guided signals to the actuators.
    Type: Grant
    Filed: June 28, 2005
    Date of Patent: June 26, 2007
    Inventors: Ingvar Claesson, Lars Hakansson, Thomas Lago, Rolf Zimmergen, Göran H{dot over (a)}llstedt
  • Patent number: 7222702
    Abstract: A gas spring (7) comprises a cylinder main body (20); a rod member (21) slidable to cylinder main body; a gas filled chamber (23) filled with compressed gas and urging the rod member in a first direction; a rod inserting hole (32) inserting the rod member (21); an annular collar (24) slidable on the rod member at a position apart from the rod inserting hole in the second direction opposite to the first direction; an annular groove (24a) on the annular collar which is open toward the second direction; and a lock ring (26) engaging with an annular ring mounting groove (25) on the rod member (21). In assembling, the lock ring (26) is moved in the first direction together with the rod member, to thus engage with the annular groove (24a) on the annular collar, so that the annular collar for stopping the rod member and the lock ring is stopped by an end wall of the cylinder main body.
    Type: Grant
    Filed: April 5, 2002
    Date of Patent: May 29, 2007
    Assignee: Pascal Engineering Corporation
    Inventor: Seiji Kimura
  • Patent number: 7219752
    Abstract: A system for damping vibration in a drill string can include a valve assembly having a supply of a fluid, a first member, and a second member capable of moving in relation to first member in response to vibration of the drill bit. The first and second members define a first and a second chamber for holding the fluid. Fluid can flow between the first and second chambers in response to the movement of the second member in relation to the first member. The valve assembly can also include a coil or a valve for varying a resistance of the fluid to flow between the first and second chambers.
    Type: Grant
    Filed: November 8, 2004
    Date of Patent: May 22, 2007
    Inventors: Mark Ellsworth Wassell, William Evans Turner, Daniel E. Burgess, Carl Allison Perry
  • Patent number: 7152853
    Abstract: A manually operated implement such as a chain saw, a parting-off grinder or similar device has an internal combustion engine to drive a tool and a handle arrangement to operate the implement. The handle arrangement is connected to the internal combustion engine via a vibration damping system, the vibration damping system comprising at least one anti-vibration element. In order to achieve good vibration damping and sufficient operational rigidity in all operating ranges, in at least one direction of vibration in a predetermined frequency range the anti-vibration element has a first characteristic curve in a first state and a second characteristic curve in a second state and the anti-vibration element can be switched between the first state and the second state.
    Type: Grant
    Filed: June 4, 2004
    Date of Patent: December 26, 2006
    Assignee: Andreas Stihl AG & Co. KG
    Inventors: Johannes Menzel, Helmut Lux, Marc Schmid, Günter Wolf
  • Patent number: 7125211
    Abstract: A machine tool for performing a machine tool function including components adapted to cooperate with each other to execute the machine tool function. The machine tool has a number of constituent parts and a number of sheets of damping material. Each component includes constituent parts with sheets of damping material interposed between the constituent parts. The sheets dampen vibration of the machine tool during performance of the machine tool function.
    Type: Grant
    Filed: October 17, 2003
    Date of Patent: October 24, 2006
    Assignee: Racer Machinery International Inc.
    Inventor: Don Zoran
  • Patent number: 7028997
    Abstract: A vibration damping tool having the following structure is provided. In the vibration damping tool, a hollow portion is formed in the interior of the distal end portion of a tool body and one end of a weight member is connected to the inner wall surface of the distal end side of this hollow portion. A gap created between the outer peripheral surface of the weight member and the inner wall surface of the hollow portion is filled with a visco-elastic body. The one end of the weight member is formed as a narrow diameter shaft portion. The tool body can be divided into two and freely removed from and reattached at a dividing surface located on the base end side of the hollow portion. A hole portion is formed inside the other end of the weight member by hollowing out the interior thereof. Chatter vibration is thus absorbed using a simple structure without there being any effects from heat generated during cutting processing.
    Type: Grant
    Filed: March 21, 2002
    Date of Patent: April 18, 2006
    Assignee: Mitsubishi Materials Corporation
    Inventors: Hidebumi Takahashi, Yoichi Ishikawa
  • Patent number: 6976400
    Abstract: A method of damping a semiconductor wafer handling arm by attaching a spring and a mass coupled to the spring to form a mass spring system that is tuned to vibrate at a structural resonant frequency of the vibrating wafer handling arm. The spring has temperature insensitive spring characteristics and the mass and spring are constructed of materials that do not outgas or produce contaminants in a semiconductor processing environment. The mass spring system is preferably a cantilever beam spring connected to a high response point on the vibrating arm and oriented to vibrate in a plane perpendicular to the plane of the wafer. The mass is slidably adjustable along the length of the cantilever beam spring to adjust the resonant frequency. Vibration damping of the wafer handling arm is accomplished by the transfer of kinetic energy from the vibrating wafer handling arm to the mass spring system.
    Type: Grant
    Filed: May 27, 2004
    Date of Patent: December 20, 2005
    Assignee: Novellus Systems, Inc.
    Inventor: Mark Tan
  • Patent number: 6905114
    Abstract: A shock absorbing apparatus and method includes a shaft travelling north and south within a tube. The tube is positioned south of a sucker rod. The shaft has a piston head coupled at a south end thereof, which piston head is received in an area of reduced diameter with the shaft. North pores and south pores permit the movement of fluid into and out of the interior of the tube, in response to the northward/southward movement of the piston head. Fluid entering through the pores provides a shock absorbing effect on both the upstroke and the downstroke. The shock absorbing effect on the upstroke can be rapidly eliminated and an upward shock force generated, through the shearing of a shear pin that maintains a bushing in position on the shaft, restricting northward travel of the piston head.
    Type: Grant
    Filed: July 30, 2003
    Date of Patent: June 14, 2005
    Inventor: Michael Brent Ford
  • Patent number: 6883789
    Abstract: A machine tool main spindle balancer wherein the annular sealing members of a gas spring that supports the main spindle unit to reduce the load of an elevating mechanism are easily replaceable. A gas spring of a machine tool main spindle balancer comprises a cylinder body, which is filled with a compressed gas, a rod that extends downward from the inside of cylinder body, a head-side end wall member of cylinder body having a filling valve, a sleeve member forming a circumferential wall around a rod insertion hole mounted hermetically and detachably on a rod-side end wall member, and annular sealing members and mounted on said sleeve member, so that annular sealing members can be replaced easily by discharging the compressed gas, and removing only sleeve member while holding rod on head-side end wall member.
    Type: Grant
    Filed: February 15, 2002
    Date of Patent: April 26, 2005
    Assignee: Pascal Engineering Corporation
    Inventor: Seiji Kimura
  • Patent number: 6817598
    Abstract: The present invention provides a gun brake system adapted to slow the descent of a tool string in a well. In one embodiment, the brake system comprises a brake installed within the well and having a snug fitting restriction and one or more fluid channels extending along a portion thereof. The brake system further provides means for maintaining the fluid volume substantially constant within the production tubing to which the gun brake is installed.
    Type: Grant
    Filed: October 25, 2002
    Date of Patent: November 16, 2004
    Assignee: Schlumberger Technology Corporation
    Inventors: Robert A. Parrott, Stephen F. Lloyd, Gerhard Schoonderbeek, Atilla Kaplan, Henrik Praesius, Kuo-Chiang Chen