Unbalanced Weight Patents (Class 74/87)
  • Patent number: 10166573
    Abstract: An eccentric assembly controlled by a rotational speed thereof. The eccentric assembly includes: a housing driven and rotated by a motor; an eccentric shaft installed in the housing to have a changeable angular position by rotating relative to the housing; a locking device adopted to lock the eccentric shaft by engaging with one side of the eccentric shaft and to unlock the eccentric shaft when a rotational speed of the housing is greater than a locking critical speed; a clamping device adopted to clamp an opposite side of the one side of the eccentric shaft that engages with the locking device and to release clamping to the eccentric when a rotational speed of the housing is greater than a clamping critical speed; and a stopper installed in the housing so as to limit a rotation angle of the eccentric shaft generated when locking and clamping to the eccentric shaft are released.
    Type: Grant
    Filed: December 28, 2015
    Date of Patent: January 1, 2019
    Assignee: Volvo Construction Equipment AB
    Inventor: Maciej Karcz
  • Patent number: 9782800
    Abstract: A vibratory drive of a vibrating roller includes an unbalanced-mass vibration generator configured to be used in at least one drum of the vibrating roller. The vibrating roller is operated by an external drive device or advancing device such that the unbalanced-mass vibration generator can be rotated relative to the drum in at least one direction. The unbalanced-mass vibration generator is mechanically coupled to a hydraulic motor, which is configured to be supplied with a pressure medium by a hydraulic pump to rotate the unbalanced-mass vibration generator. At least one high-pressure accumulator is provided to accommodate pressure medium pumped by the hydraulic motor in a pushing operation. The high-pressure accumulator feeds stored pressure medium to the hydraulic motor in a driving operation of the hydraulic motor.
    Type: Grant
    Filed: December 22, 2010
    Date of Patent: October 10, 2017
    Assignee: Robert Bosch GmbH
    Inventors: Nikolaus Renz, Tobias Simmendinger
  • Patent number: 9531235
    Abstract: Systems and methods involving reconfigurable rotating masses are disclosed. One embodiment may take the form of a system having a motor and coupled weights attached to the motor. Operation of the motor rotates the coupled weights and the weights are dynamically reconfigurable to change the location of the center of mass relative to an axis of rotation.
    Type: Grant
    Filed: April 27, 2012
    Date of Patent: December 27, 2016
    Assignee: Apple Inc.
    Inventors: Fletcher Rothkopf, Colin M. Ely
  • Patent number: 9284696
    Abstract: A compactor roller for a soil compactor comprises an oscillation mass assembly (34) including at least one oscillation shaft (36) rotatable about an oscillation-shaft axis of rotation eccentric to a compactor-roller axis of rotation, which oscillation mass assembly (34) includes at least one oscillation unbalance mass (66, 68), and a vibration mass assembly (84) including a vibration shaft (86) rotatable about a vibration shaft axis of rotation (Dv), which vibration mass assembly (84) includes at least one vibration unbalance mass (96), wherein at least one oscillation shaft (36, 38) and the vibration shaft (86) are carried in the compactor roller (10) such that they can be driven to rotate.
    Type: Grant
    Filed: January 31, 2013
    Date of Patent: March 15, 2016
    Assignee: HAMM AG
    Inventors: Richard Fischer, Günter Kolberg, Günter Rath, Josef Dagner
  • Patent number: 9241773
    Abstract: An implantable tissue marker incorporates a contrast agent sealed within a chamber in a container formed from a solid material. The contrast agent is selected to produce a change, such as an increase, in signal intensity under magnetic resonance imaging (MRI). An additional contrast agent may also be sealed within the chamber to provide visibility under another imaging modality, such as computed tomographic (CT) imaging or ultrasound imaging.
    Type: Grant
    Filed: March 2, 2015
    Date of Patent: January 26, 2016
    Assignee: Breast-Med, Inc.
    Inventors: Patrick Bolan, Michael G. Garwood, Michael T. Nelson, Daniel A. Halpern
  • Patent number: 9158014
    Abstract: In some embodiments, an apparatus and a system, as well as a method and an article, may operate to rotate a rotatable driving member having at least one driving lobe, and to periodically contact at least one cam on a unitary driven member with the at least one driving lobe during rotation of the rotatable driving member, to set the driven member in motion. This motion can be used to launch an acoustic wave along an axis substantially orthogonal to the axis of rotation of the driving member, where the driving member disposed completely within the driven member. The signature of the acoustic wave can be at least partially determined by the profile of the cam and the rotation rate of the driving member. Additional apparatus, systems, and methods are disclosed.
    Type: Grant
    Filed: April 9, 2012
    Date of Patent: October 13, 2015
    Assignee: Halliburton Energy Services, Inc.
    Inventors: Clovis Bonavides, Batakrishna Mandal, Arthur Cheng, Wei Zhang, Philip William Tracadas, Gary Kainer, Hong Li Hou, Burkay Donderici
  • Patent number: 9038491
    Abstract: A vibratory device comprises a rotor and an eccentric weight. The eccentric weight is mounted to the shaft and has a center of mass that is offset from the shaft axis. The vibratory device is configured such that the eccentric weight is in a first rotational orientation relative to the shaft and rotates with the shaft when the shaft rotates in a first direction about the shaft axis and such that the eccentric weight is in a second rotational orientation relative to the shaft when the shaft rotates in an opposite second direction about the shaft axis. The vibratory device is further configured such that the eccentric weight automatically transitions from the first rotational orientation to the second rotational orientation when the shaft is switched from rotating in the first direction to rotating in the second direction.
    Type: Grant
    Filed: May 6, 2013
    Date of Patent: May 26, 2015
    Assignee: Martin Engineering Company
    Inventors: Grant S. Burton, Travis J. Miller
  • Patent number: 8919215
    Abstract: An orbital motion attachment for a die grinder includes a flexible collar mounted at a first end to a locating support ring and the locating support ring being removably secured to the die grinder. A collet has an offset bearing shaft extending from a first end. The collet is connected at a second end to an output shaft of the die grinder and the offset bearing shaft is connected at a second end to an applicator tip. An indexing ring is affixed to a second end of the flexible collar to secure the applicator tip to the offset bearing shaft.
    Type: Grant
    Filed: March 7, 2012
    Date of Patent: December 30, 2014
    Inventor: Roger C. Keith
  • Publication number: 20140326088
    Abstract: A vibratory device comprises a rotor and an eccentric weight. The eccentric weight is mounted to the shaft and has a center of mass that is offset from the shaft axis. The vibratory device is configured such that the eccentric weight is in a first rotational orientation relative to the shaft and rotates with the shaft when the shaft rotates in a first direction about the shaft axis and such that the eccentric weight is in a second rotational orientation relative to the shaft when the shaft rotates in an opposite second direction about the shaft axis. The vibratory device is further configured such that the eccentric weight automatically transitions from the first rotational orientation to the second rotational orientation when the shaft is switched from rotating in the first direction to rotating in the second direction.
    Type: Application
    Filed: May 6, 2013
    Publication date: November 6, 2014
    Inventors: Grant S. Burton, Travis J. Miller
  • Publication number: 20140283633
    Abstract: The invention relates to a vibration exciter, in particular for a construction machine, having at least one rotatably supported unbalanced unit with at least one unbalanced element, a rotary drive, a gear arrangement with at least one gear wheel, wherein a rotation generated by the rotary drive can be transmitted by means of the gear arrangement to the at least one unbalanced unit, and a housing, in which the gear arrangement is accommodated. In accordance with the invention an energy-saving and low-maintenance arrangement is achieved in that by means of the gear arrangement an output shaft can be driven that extends out of the housing and in that the at least one unbalanced element is fixed outside of the housing on the output shaft.
    Type: Application
    Filed: March 20, 2014
    Publication date: September 25, 2014
    Applicant: EURODRILL GMBH
    Inventor: Horst DAMM
  • Publication number: 20140260723
    Abstract: Systems and methods involving reconfigurable rotating masses are disclosed. One embodiment may take the form of a system having a motor and coupled weights attached to the motor. Operation of the motor rotates the coupled weights and the weights are dynamically reconfigurable to change the location of the center of mass relative to an axis of rotation.
    Type: Application
    Filed: March 14, 2013
    Publication date: September 18, 2014
    Inventors: Colin M. Ely, Avi Hecht
  • Patent number: 8813589
    Abstract: The present invention relates to an eccentric moment stepless adjustable vibrating mechanism comprising a box body.
    Type: Grant
    Filed: December 31, 2010
    Date of Patent: August 26, 2014
    Inventor: Zhongsheng Tang
  • Patent number: 8806691
    Abstract: The invention provides an electric toothbrush capable of changing a resonant frequency and vibration amplitude of an eccentric shaft. An electric toothbrush of the present invention includes a motor, an eccentric shaft with one end fixed to a rotation shaft of the motor, and a stemserving as a vibration transmitting component having a bearing for supporting the other end of the eccentric shaft for transmitting vibration generated in accordance with rotation of the eccentric shaft to a brush portion. In the electric toothbrush, the eccentric shaft is formed so that a gravity center position is movable at least in one direction among a direction in which a distance to a shaft center is changed and an axial direction.
    Type: Grant
    Filed: March 15, 2013
    Date of Patent: August 19, 2014
    Assignee: Omron Healthcare Co., Ltd.
    Inventors: Toshiyuki Iwahori, Akitoshi Miki, Jun Shimoyama, Takashi Torihama
  • Publication number: 20140189957
    Abstract: A bed vibration system to provide controllable vibrations beneath a mattress, which is located on a bed, the system comprising: a frame attachable to the bed by at least four suspension modules; at least two vibration modules, each vibration module having a rotatable element; at least two travel tracks attachable to the frame, the travel tracks configurable to have the at least two vibration modules respectively displaceable thereupon; and a vibration module control unit configurable to control vibrations and displacement of the respective vibration modules.
    Type: Application
    Filed: May 30, 2012
    Publication date: July 10, 2014
    Inventor: David Mijan
  • Patent number: 8769949
    Abstract: Disclosed is a control system and method for controlling a superturbocharged engine system in various operation modes. Throttle control mode may idle the superturbocharger during low and medium engine loads, so that boost is not created in the intake manifold. During high engine load conditions (open throttle), boosting occurs in response to the driver, operator, or control system requesting increased engine loads. For transient control mode, the control system may respond to transient conditions in response to engine speed and load so that the engine does not bog down or overcome vehicle traction limits. The control system may also predict future operating points.
    Type: Grant
    Filed: July 26, 2011
    Date of Patent: July 8, 2014
    Assignee: Vandyne Superturbo, Inc.
    Inventors: Ed VanDyne, Jared William Brown, Volker Schumacher, Christopher J. Chadwell
  • Publication number: 20140174218
    Abstract: A method and system for inducing a planned or controlled avalanche is disclosed. The system includes one or more sources of vibration mounted within a mass which is mounted within an aperture in the ground in the area where an avalanche has been determined to be likely to occur. The source of vibration is a drive system from a vehicle (such as a golf cart), preferably modified to increase the vibration and mounted in a vibrating mass (such as a concrete culvert). The vibrating mass may be mounted within an aperture in the ground and secured in place using concrete to increase the vibration-transmitting characteristics of the vibrating mass. An electrical system including a source of electricity and a storage device, as well as controls, is mounted separate from the source of vibration and the vibrating mass (e.g., the concrete culvert) to isolate portions of the electrical system (including the storage device) from some of the effects of the vibration.
    Type: Application
    Filed: February 28, 2014
    Publication date: June 26, 2014
    Inventor: James R. Hughes
  • Publication number: 20140137677
    Abstract: An inertia pump is connected to and actuated by the vibration of a vibratory device to pump lubricant to lubricate internal components of the vibratory device. The inertia pump has a bottom end cap with an inlet in fluid communication with the vibratory device, a top end cap with an outlet for delivering the lubricant to lubricate components of the vibratory device, a tube disposed between and sealingly engaging the bottom end cap and the top end cap, and a piston having a lubricant passageway. The piston is slidably disposed within the tube downstream of the bottom end cap and upstream of the top end cap. Vibration of the vibration device causes the piston to oscillate within the tube to draw lubricant from the vibration device which passes through the lubricant passageway in the piston, and delivers lubricant to lubricate internal components of the vibration device.
    Type: Application
    Filed: November 19, 2012
    Publication date: May 22, 2014
    Applicant: American Piledriving Equipment, Inc.
    Inventor: John L. White
  • Patent number: 8720162
    Abstract: A motor-driven machine tool comprises a tool driven in a rotating fashion, a drive shaft driven by a drive unit and an output shaft for holding the tool. According to the invention, the rotating motion of the drive shaft can be transferred to the output shaft by way of an eccentric coupling device. A mass balancing device is provided for smoothing out vibrations, which has a stroking mass part moveably mounted in a carriage guide and impinged by an eccentric member driven by one of the shafts. The stroking mass part executes a rotary smoothing motion.
    Type: Grant
    Filed: November 11, 2008
    Date of Patent: May 13, 2014
    Assignee: Robert Bosch GmbH
    Inventor: Adolf Zaiser
  • Patent number: 8656795
    Abstract: An easily switchable automatic transmission eccentric shaft includes an input shaft over which a movable centrifugal saddle is fit. An elastic body is arranged between the centrifugal saddle and the input shaft. The centrifugal saddle is provided at one side thereof with an openable weight assembly, which selectively moves the centrifugal saddle with respect to the input shaft. A balance weight is coupled to one side of the weight assembly. The balance weight forms a limiting structure that includes two retention members and an elastic element between the retention members. The limiting structure helps controlling preciseness of variable transmission, helps increasing available transmission positions, facilitates the weight assemblies returning back to home positions, and is suitable for high horsepower applications.
    Type: Grant
    Filed: December 16, 2010
    Date of Patent: February 25, 2014
    Inventor: Shih-Chou Wen
  • Patent number: 8590408
    Abstract: A vibration exciter for a ground compactor comprises an exciter shaft having at least one exciter weight disposed thereon and having at least one turnover weight which is disposed so that it can rotate relative to this exciter shaft. A ground compactor having such a vibration exciter is also disclosed.
    Type: Grant
    Filed: May 26, 2011
    Date of Patent: November 26, 2013
    Assignee: BOMAG GmbH
    Inventors: Gilbert Stein, Alexander Dykhnich
  • Publication number: 20130283941
    Abstract: A method comprises accessing a vibratory device having a rotor and first and second eccentric weights. The first weight is initially attached to the rotor's shaft in a manner such that its center of the mass is offset from the shaft in a first radial direction. The second weight is initially attached to the shaft in a manner such that its center of the mass is also offset in the first radial direction. The method further comprises reorienting the first and second weights relative to the shaft in a manner such that their centers of the mass are offset in a second radial direction. By performing these steps, the location of greatest bearing surface wear rate on the shaft is circumferentially relocated about the shaft. As such, the service life of an eccentric weight vibratory device is thereby extended.
    Type: Application
    Filed: April 27, 2012
    Publication date: October 31, 2013
    Applicant: MARTIN ENGINEERING COMPANY
    Inventor: Grant S. Burton
  • Publication number: 20130233101
    Abstract: The present invention relates to an eccentric moment stepless adjustable vibrating mechanism comprising a box body.
    Type: Application
    Filed: December 31, 2010
    Publication date: September 12, 2013
    Inventor: Zhongsheng Tang
  • Publication number: 20130055835
    Abstract: The present invention relates to a vibration exciter for generating a directed excitation vibration, especially for installation in a vibration tamper, and a machine with such a vibration exciter, comprising at least two parallel extending unbalance shafts which are rotatable against one another, on which at least one respective fixed unbalance mass and at least one respective movable unbalance mass are arranged, with the positions of the movable unbalance masses on the unbalance shafts being variable by way of an adjusting device for adjusting the amplitude of the exciter vibration, and with the adjusting device comprising a central adjusting element for amplitude adjustment which acts on the movable unbalance masses of the two unbalance shafts, which central adjusting element is arranged coaxially to a rotational axis (AS) about which the vibration exciter is rotatable for the purpose of vector adjustment of the excitation vibration.
    Type: Application
    Filed: August 3, 2012
    Publication date: March 7, 2013
    Applicant: BOMAG GMBH
    Inventors: Christian Schmidt, Jens Wagner
  • Publication number: 20120125824
    Abstract: The mechanical vibrator is applied to vibrating screens or other equipment and comprises a bearing housing to be affixed to a side wall of the equipment, to carry a pair of bearings which support a shaft having an inner end portion and an outer end portion which respectively affix a first and a second counterweight. The first and the second counterweights have respective first and second eccentric masses of different values and which are positioned and dimensioned so that the first and the second counterweight generate equal loads on the bearings. The second counterweight is constructed to selectively and removably attach a third counterweight presenting a third eccentric mass maintained aligned with the center line of the bearing housing, to provide a variation of the total eccentric mass of the vibrator, without changing the balance of the load distribution on the bearings.
    Type: Application
    Filed: December 21, 2011
    Publication date: May 24, 2012
    Applicant: METSO BRASIL INDUSTRIA E COMERCIA LTDA
    Inventor: Andrzej Niklewski
  • Patent number: 8156832
    Abstract: The mechanical vibrator is applied to vibrating screens or other equipment and comprises a bearing housing (10) to be affixed to a side wall (2) of the equipment (1), to carry a pair of bearings (20) which support a shaft (30) having an inner end portion (31) and an outer end portion (32) which respectively affix a first and a second counterweight (70, 80). The first and the second counterweights (70, 80) have respective first and second eccentric masses (M1, M2) of different values and which are positioned and dimensioned so that the first and the second counterweight (70,80) generate equal loads on the bearings (20). The second counterweight (80) is constructed to selectively and removably attach a third counterweight (90) presenting a third eccentric mass (M3) maintained aligned with the center line (CL) of the bearing housing (10), to provide a variation of the total eccentric mass of the vibrator (V), without changing the balance of the load distribution on the bearings (20).
    Type: Grant
    Filed: July 4, 2007
    Date of Patent: April 17, 2012
    Assignee: Metso Brasil Industria E Comercia Ltda
    Inventor: Andrzej Niklewski
  • Publication number: 20110209571
    Abstract: The mechanical vibrator is applied to vibrating screens or other equipment and comprises a bearing housing (10) to be affixed to a side wall (2) of the equipment (1), to carry a pair of bearings (20) which support a shaft (30) having an inner end portion (31) and an outer end portion (32) which respectively affix a first and a second counterweight (70, 80). The first and the second counterweights (70, 80) have respective first and second eccentric masses (M1, M2) of different values and which are positioned and dimensioned so that the first and the second counterweight (70,80) generate equal loads on the bearings (20). The second counterweight (80) is constructed to selectively and removably attach a third counterweight (90) presenting a third eccentric mass (M3) maintained aligned with the center line (CL) of the bearing housing (10), to provide a variation of the total eccentric mass of the vibrator (V), without changing the balance of the load distribution on the bearings (20).
    Type: Application
    Filed: July 4, 2007
    Publication date: September 1, 2011
    Applicant: METSO BRASIL INDUSTRIA ECOMERCIO LTDA
    Inventor: Andrzej Niklewski
  • Publication number: 20110132114
    Abstract: The present invention relates to a vibration apparatus, a hand-held mobile device and a method for operating the vibration apparatus with which the time to obtain a detectable vibration effect is reduced while still being able to provide also a strong vibration effect. The vibration apparatus comprises a first weight member; a second weight member; a driving section coupled to said first weight member and operable to rotate at least said first weight member around a rotation axis; and a coupling mechanism adapted to provide coupling between said first weight member and said second weight member so that in a first state said first weight member is rotated by said driving section and in a second state said first weight member and said second weight member are rotated by said driving section.
    Type: Application
    Filed: December 3, 2009
    Publication date: June 9, 2011
    Applicant: Sony Ericsson Mobile Communications AB
    Inventor: Georg Siotis
  • Patent number: 7950379
    Abstract: An apparatus for moving a mass, the apparatus having an arcuate track, a clamping member attached to a section of the arcuate track, an arm assembly pivotably connected to the clamping member, and a counterweight connected to the arm assembly. A projectile for use in a mass accelerator having an arcuate track, the projectile having a core and at least one of a low-friction layer, a propellant layer, and a polycarbonate layer.
    Type: Grant
    Filed: July 16, 2008
    Date of Patent: May 31, 2011
    Assignee: Advanced Launch Corporation
    Inventor: Derek A. Tidman
  • Publication number: 20110067510
    Abstract: An eccentric vibrating amplitude device of a vibrator includes an eccentric unit on at least one end of an extended shaft of a reversible motor and includes a balance block located at an innermost location of the eccentric unit mounted on a shaft and an eccentric block located at the outermost location. on the shaft. The balance block and eccentric block include an eccentric round hole block and eccentric blocks for receiving the shaft. When mounted on the extended shaft of a reversible motor, the rotational angle between the balance block and the eccentric block and the torque on the motor selectively changes when the motor rotates in a positive or a negative direction. Hence there is provided a selectable or variable vibrating amplitude intensity.
    Type: Application
    Filed: December 1, 2010
    Publication date: March 24, 2011
    Inventor: Huan Yao PENG
  • Patent number: 7798029
    Abstract: Disclosed is a vibration apparatus for generating a spheroid wavelength by eccentrically rotating a rotation shaft using an eccentric weight.
    Type: Grant
    Filed: February 14, 2007
    Date of Patent: September 21, 2010
    Inventor: Doo Sang Kim
  • Publication number: 20100050795
    Abstract: A vibration generator has at least two shaft groups, on which at least two imbalance groups are disposed, and which are connected with at least one drive by means of which they are put into rotation. The shaft groups are connected with the at least one drive so that the speed of rotation of one shaft group amounts to a multiple of at least one other shaft group, and the shaft groups demonstrate a significantly different static moment with regard to one another. At least one of the shaft groups is connected with a phase shifter, by way of which the static moment of the shaft group can be adjusted.
    Type: Application
    Filed: July 7, 2009
    Publication date: March 4, 2010
    Inventors: Christian Heichel, Albrecht Kleibl
  • Publication number: 20090181727
    Abstract: A vibrator assembly includes an electric motor, a shaft driven by the motor, and a cylindrical weight coaxially positioned on the shaft free end, wherein the cylindrical weight has a center of gravity that is radially offset from the shaft axis. The cylindrical weight includes a first portion that is lighter in weight than a second portion. When the vibrator assembly is installed within an electronic device, the cylindrical shape of the weight limits the amount of shaft deflection that can occur when the electronic device is dropped or subjected to other impact forces.
    Type: Application
    Filed: March 25, 2009
    Publication date: July 16, 2009
    Inventors: Gustav Fagrenius, Goran Schack
  • Patent number: 7554237
    Abstract: A device for generating forces that are variable and controllable in amplitude, in direction, and in frequency, the device includes two unbalanced rotors (18, 20, 35 to 38) mounted coaxially in a casing (11). The device further includes electromagnetic drive elements for driving a first of the two rotors in rotation relative to the second of the two rotors, and brake elements (43 to 45) for braking the second rotor (20, 36, 38) relative to the casing.
    Type: Grant
    Filed: May 24, 2006
    Date of Patent: June 30, 2009
    Assignee: Eurocopter
    Inventor: Sylvain Clary
  • Patent number: 7302871
    Abstract: The invention relates to an oscillation generating device for use in a soil compacter with a tipping moment compensation device. A second unbalance shaft pair with oppositely rotating unbalance shafts is arranged adjacent to a first unbalance shaft pair as a tipping moment compensation device. Diagonally opposite unbalance shafts rotate in the same direction. In this way, centrifugal forces and torques on the two unbalance shaft pairs reciprocally cancel each other out so that no tipping moment occurs parallel to the axes of rotation of the unbalances.
    Type: Grant
    Filed: February 6, 2004
    Date of Patent: December 4, 2007
    Assignee: Bomag GmbH
    Inventor: Niels Laugwitz
  • Patent number: 7270025
    Abstract: An adjusting device (11) is for regulating the eccentric moment of an eccentric shaft (2) of a roller drum (1) through the influence of an axially directed force transmitted by a force transmission mechanism (12) to a turning device (5), in order to cause a rotation of the eccentric shaft (2). The force transmission mechanism (12) is connected to the adjusting device (11). The adjusting device (11) incorporates a driving device (20), a transmission (19), a tube sleeve (17) and a guide screw (14) which is rotatably arranged in a threaded bore (16) in a journalling shaft (15) for the roller drum (1). The driving device (20) is connected to the tube sleeve (17) via a transmission (19) for transmitting a rotary movement to the tube sleeve (17).
    Type: Grant
    Filed: March 22, 2004
    Date of Patent: September 18, 2007
    Assignee: Metso Dynapac AB
    Inventor: Nils-Göran Niglöv
  • Patent number: 7213479
    Abstract: A vibratory mechanism includes vibratory shafts, which are stored within a roll and are arranged symmetrically across a rotation axis of the roll, fixed eccentric weights fixed to respective vibratory shafts, rotatable eccentric weights rotatably attached to respective vibratory shafts, a rotation controller controlling a range of movement of the rotatable eccentric weights, and an eccentric moment controller which changes an eccentric moment around the vibratory shaft depending on the rotation direction of the vibratory shafts, whereby the vibration state of the roll is switchable between standard vibration and horizontal vibration.
    Type: Grant
    Filed: February 24, 2004
    Date of Patent: May 8, 2007
    Assignee: Sakai Heavy Industries, Ltd.
    Inventor: Akira Mitsui
  • Patent number: 7171866
    Abstract: A vibration generator comprises two unbalance shafts, which are positively coupled in a contra-rotative manner and whose relative phrase position can be shifted by a phase shifting device. Each of the unbalance shafts supports a main unbalance mass and a partial unbalance mass that can move in relation thereto. The position of the partial unbalance masses on the respective unbalance shafts can be actively altered within a large range by adjusting devices. The resulting vibration vector generated by the vibration generator can set in a diverse manner with regard to direction and magnitude.
    Type: Grant
    Filed: August 3, 2001
    Date of Patent: February 6, 2007
    Assignee: Wacker Construction Equipment AG
    Inventors: Wolfgang Fervers, Martin Schreck, Franz Riedl
  • Patent number: 7165469
    Abstract: An easily accessible phase adjustment mechanism for a vibratory plate compactor includes an improved seal arrangement to protect against leakage of internal lubricating oil into the hydraulic cylinder providing fluid pressure to the adjustment mechanism. An easily demountable cylinder housing provides ready access to the piston and seal assembly which can then be threadably detached and replaced in its entirety.
    Type: Grant
    Filed: April 10, 2003
    Date of Patent: January 23, 2007
    Assignee: M-B-W Inc.
    Inventors: Eric A. Niemi, Michael W. Schmitt
  • Patent number: 7117758
    Abstract: The invention relates to vibration generator for a soil compacting device referred to as a towed vibrating device. The vibration generator has two parallels arranged unbalanced shafts that each support a fixed and a freely rotating unbalanced mass. An unbalance adjusting device enables the position of both freely rotating unbalanced masses to be adjusted in such a manner that, during a maximum unbalance action of one of the unbalanced shafts, the unbalance action on the other unbalanced shaft is minimized. The unbalance adjusting device can alter the position of the unbalanced masses whereby rendering possible a to-and-fro movement of the soil compacting device or a compaction when stationary.
    Type: Grant
    Filed: September 27, 2002
    Date of Patent: October 10, 2006
    Assignee: Wacker Construction Equipment A.G..
    Inventor: Franz Riedl
  • Patent number: 7089823
    Abstract: A controller for use in a vibratory mechanism includes an amplitude control circuit that generates an amplitude control signal that varies from a minimum value to a maximum value. The vibratory mechanism is adapted to vibrate at an amplitude based on an amplitude control signal characteristic. Additionally, the controller includes a frequency control circuit that is operatively coupled to the amplitude control-circuit to produce a frequency control signal that varies based on the amplitude control signal characteristic.
    Type: Grant
    Filed: May 29, 2002
    Date of Patent: August 15, 2006
    Assignee: Caterpillar Paving Products Inc.
    Inventor: Dean R. Potts
  • Patent number: 7084535
    Abstract: A deflection limiting member (110, 310) or a deflection limiting mechanism (512, 514) is used to limit deflection of a motor shaft (102) of a vibrator (105, 305, 505) in a portable electronic device (104,304, 504). The deflection limiting member (110, 310) extends in a radial direction from the motor shaft (102) on a side of the motor shaft (102) that is opposite to the center of gravity (108, 308) of an eccentric weight (108, 308). The deflection limiting member (110, 310) contacts a fixed surface such as a printed circuit board (112) to limit deflection of the motor shaft (102). The deflection limiting mechanism (512, 514) prevents an inertial force of an eccentric weight 510 from being applied directly to the motor shaft (102) under conditions in which there is a high risk of permanent deformation of the motor shaft (102).
    Type: Grant
    Filed: July 30, 2004
    Date of Patent: August 1, 2006
    Assignee: Motorola, Inc.
    Inventors: Martin E. Holman, IV, Oscar J. Pichardo
  • Patent number: 7059802
    Abstract: A lightweight, easy to assemble, and compact exciter assembly for a compaction device such as a drum assembly of a vibratory trench roller or the like includes a fixed weight and one or more free swinging weights mounted on an exciter shaft, without using any mounting hardware, so as to hold the free swinging weights axially in position while permitting them to swing between first and second angular positions on the exciter shaft. Preferably, the fixed weight is mounted on a central portion of the exciter shaft, and two free swinging weights are mounted adjacent the ends of the fixed weight so as to be restrained from substantial sliding movement along the exciter shaft solely by the fixed weight and other operative components of the exciter assembly such as bearings and/or gears or other torque transfer elements.
    Type: Grant
    Filed: November 15, 2000
    Date of Patent: June 13, 2006
    Assignee: Wacker Corporation
    Inventors: Daniel Geier, Ronald Brinkmann, Jay Baudhuin
  • Patent number: 7017679
    Abstract: The invention relates to steerable vibration plates that are set vibrating by rotating unbalanced masses. By twisting the unbalanced masses relative to one another the resulting forces and their direction of action can be changed, thereby influencing the travel speed of the vibrating plate and its direction of travel. The inventive vibration plate is characterized in that the unbalanced masses disposed on a common shaft can be adjusted independent of external forces and torques since the adjustment piston adjusting the unbalanced masses is braced in the adjustment cylinder to a much higher degree than would be possible with conventional coil springs. To this end, every adjustable unbalanced mass is associated with a double-action hydraulic cylinder that comprises two liquid chambers. The connection of said chambers to a storage and a pump can be locked in order to fix the piston which can be adjusted within the hydraulic cylinder.
    Type: Grant
    Filed: November 21, 2001
    Date of Patent: March 28, 2006
    Assignee: Wacker Construction Equipment AG
    Inventors: Josef Sollinger, Norbert Jungwirth
  • Patent number: 6918492
    Abstract: A sealed wheel case for use on a vibrating aggregate processing device comprises a housing sized to hold a rotatable wheel supported on a shaft, the housing having a base, a peripheral sidewall, and a cover. The cover includes an aperture adapted to receive therethrough a driven portion of the shaft. A seal is disposed adjacent the shaft and the aperture, and an annular baffle is mounted to an inside surface of the cover and extends into the wheel case. The annular baffle is positioned on the inside surface of the cover to generally surrounding the shaft and the seal, and a plurality of attachment bolts are arranged to secure the housing to the frame.
    Type: Grant
    Filed: December 12, 2001
    Date of Patent: July 19, 2005
    Inventor: David A. Ostergaard
  • Patent number: 6829986
    Abstract: In a compressor comprising at least one traveling drum (4,4a,4b) rotatable about a drum axis (2), and an oscillation exciter supported in the drum (4,4a, 4b), the angular position of the oscillation exciter being adjustable by an adjustable pivoting angle relative to a vertical plane which extends through the drum axis (2), it is provided that the oscillation exciter comprises a pendulum-type vibrator (10) having a pendulum-type housing (8) which pivots about a pivoting axis extending coaxially to the drum axis (2) and includes a single unbalance exciter shaft (12) supported at a radial parallel distance to the drum axis (2) in the pendulum-type housing (8), wherein the pendulum-type vibrator (10) generates an elliptical drum oscillation.
    Type: Grant
    Filed: May 29, 2003
    Date of Patent: December 14, 2004
    Assignee: Hamm AG
    Inventor: Wolfgang Richter
  • Publication number: 20040200299
    Abstract: An easily accessible phase adjustment mechanism for a vibratory plate compactor includes an improved seal arrangement to protect against leakage of internal lubricating oil into the hydraulic cylinder providing fluid pressure to the adjustment mechanism. An easily demountable cylinder housing provides ready access to the piston and seal assembly which can then be threadably detached and replaced in its entirety.
    Type: Application
    Filed: April 10, 2003
    Publication date: October 14, 2004
    Inventors: Eric A. Niemi, Michael W. Schmitt
  • Publication number: 20040182185
    Abstract: An adjusting device (11) for regulating the eccentric moment of an eccentric shaft (2) of a roller drum (1) through the influence of axially directed force transmitted by a force transmission mechanism (12) to a turning device (5), in order to cause a rotation of the eccentric shaft (2). The force transmission mechanism (12) is connected to the adjusting device (11). The adjusting device (11) incorporates a driving device (20), a transmission (19), a tube sleeve (17) and a guide screw (14) which is rotatably arranged in a threaded bore (16) in a journalling shaft (15) for the roller drum (1). The driving device (20) is connected to the tube sleeve (17) via a transmission (19) for transmitting a rotary movement to the tube sleeve (17).
    Type: Application
    Filed: March 22, 2004
    Publication date: September 23, 2004
    Inventor: Nils-Goran Niglov
  • Publication number: 20040173040
    Abstract: The invention relates to an oscillation generating device for use in a soil compacter with a tipping moment compensation device. A second unbalance shaft pair with oppositely rotating unbalance shafts is arranged adjacent to a first unbalance shaft pair as a tipping moment compensation device. Diagonally opposite unbalance shafts rotate in the same direction. In this way, centrifugal forces and torques on the two unbalance shaft pairs reciprocally cancel each other out so that no tipping moment occurs parallel to the axes of rotation of the unbalances.
    Type: Application
    Filed: February 6, 2004
    Publication date: September 9, 2004
    Inventor: Niels Laugwitz
  • Publication number: 20040168531
    Abstract: A vibratory mechanism which is composed of vibratory shafts, which are stored within a roll and are arranged symmetrically across a rotation axis of the roll, a fixed eccentric weight fixed to respective vibratory shafts, a rotatable eccentric weight rotatably attached to respective vibratory shafts, a rotation controller controlling a range of movement of the rotatable eccentric weight, and an eccentric moment controller which changes an eccentric moment around the vibratory shaft depending on the rotation direction of the vibratory shafts, whereby the vibration state of the roll is switchable between standard vibration and horizontal vibration.
    Type: Application
    Filed: February 24, 2004
    Publication date: September 2, 2004
    Applicant: Sakai Heavy Industries, Ltd.
    Inventor: Akira Mitsui
  • Patent number: 6769838
    Abstract: A vibratory mechanism includes first and second eccentric weights connected to a gearbox. The gearbox includes an inner shaft, an outer shaft and first and second planetary gear sets. The first and second planetary gear sets are connected to a motor that drives the first and second eccentric weights during operation via the inner shaft and outer shaft respectively. A phase control device is operatively connected to the second planetary gear set to index the second eccentric weight relative to the first eccentric weight.
    Type: Grant
    Filed: October 31, 2001
    Date of Patent: August 3, 2004
    Assignee: Caterpillar Paving Products Inc
    Inventor: Dean R. Potts