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Class 74/574.2 - Damping using swinging masses, e.g., pendulum type, etc.


Subclass of Class 74 - Machine element or mechanism
Definition: Subject matter wherein vibration is suppressed by the
No. of patents: 31
Last issue date: 04/03/2012


NumberTitleIssue Date
8146457Disk pendulum vibration damper
An apparatus for damping torsional vibration in a shaft, having a plurality of retainer pockets spaced from each other in the direction of the shaft's axis of rotation and connected for contemporaneous rotation with the shaft, and a plurality of disks each disposed ...
04/03/2012
7717013Rotating machine active balancer and method of dynamically balancing a rotating machine shaft with torsional vibrations
An active balancer for dynamically balancing a rotating machine is provided. The active balancer has a balancer body which rotates with the rotating machine and at least one controllable position counter weight having a real-time adjustable position relative to the ...
05/18/2010
7438165Torsional vibration damper of a rotating shaft
This invention is directed at torsional vibration dampers of a rotating shaft. The dampers of the invention provide self-tuning to dampen harmonics, over a broad range of shaft angular velocities. Where the shaft rotates with an angular velocity about a longitudinal...
10/21/2008
7300372Integrated pulley-torsional damper assembly
An integrated pulley-torsional damper assembly (1) comprises a hub (2) designed for being rigidly connected to a drive member (3), a pulley (4) connected to the hub (2) by means of a first ring (5) made of elastomeric materi...
11/27/2007
7232017Pole vibration damping assembly and method
A pole vibration damping means includes an annular housing with internal radial pole encircling chambers in which lead spheres are provided for effecting damping of first mode harmonic vibrations with the assembly being attached to the upper end portion of the pole ...
06/19/2007
7219578Flywheel
In a flywheel 2, a central part of a thin plate portion 3 having a flywheel mass provided on an outer peripheral side of the plate portion is joined to an end surface of a crankshaft 1 through a plurality of bolts 7 disposed annularly at ...
05/22/2007
7159952Automatic balancing device
An automatic balancing device for a rotatable system includes a track (18) arranged about a rotational axis (H) of the rotatable system and having two surfaces (22a, 22b) inclined toward each other in a direction of a centrifugal force acting (F) actin...
01/09/2007
7152565Vibration prevention structure in engine
In an engine having a propeller mounted on one end of a crankshaft, the vibrations on an end portion of the crankshaft opposite to the propeller are effectively suppressed with a pair of vibration pendulum type weights arranged outside the crankcase whereby it is po...
12/26/2006
7123431Precise positioning of media
An apparatus for exactly positioning a medium mounted on a spindle is provided, whereby the apparatus comprises a device for continuously changing the angular position of said medium with respect to a predefined reference position by rotating said spindle. Additiona...
10/17/2006
7044022Variable inertia flywheel apparatus
In a flywheel having variable inertia, first and second guide grooves are respectively formed at a body and a rotatable member such that an overlapping position thereof is varied according to a relative rotation thereof. A movable mass is disposed at the overlapping...
05/16/2006
7004294Vibration absorber assembly
A vibration absorber assembly including a disc shaped housing having a central rotational axis and a plurality of radially elongated cavities, and a plurality of movable masses, each movable mass being housed in, and movable within, one of the plurality of radially ...
02/28/2006
6694844Apparatus to recover energy through gravitational force
A gravity apparatus having a wheel-like, connected, encircling surface, includes an axially horizontal track which has an interior surface which weighted objects contact and are carried around the interior surface. The interior surface is a connected, enc...
02/24/2004
6238293Torsional vibration damper with guide paths for coupling elements
A torsional vibration damper has a drive-side damper element and a driven-side damper element which is rotatable relative to the drive-side element against the action of a damping device, wherein the damping device serves to transmit torque between the tw...
05/29/2001
5247853Flywheel
A flywheel for a stationary exercise machine having a frictional resistance strap is formed of heat-sensitive plastic, and includes a band of heat-dissipating material disposed about the periphery or rim of the flywheel for frictional contact with the res...
09/28/1993
5205190Stability high gain and dynamic stiffness servo axis drive system and method
A high gain and high torsional stiffness servo axis drive system for machine tools is described as providing improved stability. This system includes a servo motor mounted on a base and connected to a C-Axis spindle drive arrangement via a toothed drive b...
04/27/1993
5127286Adjustment device for seats
An adjustment device for seats, particularly motor vehicle seats, having a transmission, particularly a planetary gear transmission, and further including a drive shaft (2) which can be rotated by a drive device (4) coupled therewith. The mass moment of i...
07/07/1992
4842117Flywheel assembly
A flywheel assembly including a first flywheel fastened to an engine crank shaft and engaged and disengaged by a clutch disc, a second flywheel supported concentrically with the first flywheel and set to a specified mass, and a friction damping mechanism ...
06/27/1989
4803893High speed rotor balance system
A balance system for a high speed bladed rotor includes a collar (28) with an inwardly facing groove (30). Balance weights (36) are located in the groove with a cover plate (44) retaining the weights and covering the weights, groove and slots (32) in the ...
02/14/1989
4779483Torsional vibration damper
A torsional vibration damper comprising a hub ring (2) surrounded by a flyring (1), the two being united by at least one resilient member and being angularly displaceable relative to each other, the resilient member (3, 4) being of columnar shape and exte...
10/25/1988
4776442Flywheel slip clutch
A flywheel slip clutch is provided for use with implements such as agricultural balers. The flywheel slip clutch includes a plate mounted on a hub which is fixed to rotate with the input drive shaft of an implement. The plate is connected to the PTO drive...
10/11/1988
4663982Governor device for printer
In a governor device for a printer including a driving wheel rotating for a predetermined amount by means of urging force by a urging spring to feed paper and engaging with a stopper to stop at this position and a governor gear train consisting of a speed...
05/12/1987
4492131Flywheel
A flywheel including a bearing unit, a flywheel mass provided with at least two partial masses, and separate connecting means each connecting the bearing unit with a respective one of the at least two partial masses. Each respective partial mass and separ...
01/08/1985
4370900Torsional oscillation damper for combustion-engine crankshaft
A torsional oscillation damper for a combustion-engine crankshaft has a relatively light annular disk and a rigid abutment disk which are both centered on and rotatable about an axis. These two disks are spaced axially from each other but are fixed axiall...
02/01/1983
4317388Gear wheel with vibration damping rings
A gear wheel is provided with a split damping ring on each side having a close fit with the inside of the rim of the gear wheel. The rings are anchored at points remote from their split ends to the web of the wheel. A tapered bolt and nut assembly coopera...
03/02/1982
4312247Vibration reducing mount system
A vibration reducing mount system for supporting a rotary machine symmetrically about its center of rotation. The mount system comprises an annular ring bonded between two annular plates. One of the annular plates is bolted to the supported machine and th...
01/26/1982
4305264Device for damping vibrations of a drilling tube
A device for damping vibrations of a drilling tube by the slip between the ube and a fly-wheel which surrounds the tube and is frictionally connected to the tube by a slotted sleeve which is axially displaceable by adjusting means for adjusting the frictio...
12/15/1981
4262553Torsional vibration damper
A torsional vibration damper of the type having a hub which carries an outer inertia ring coupled thereto by an elastomer. Supplemental damping is added to the system via the use of dry friction. A broad frequency range of effectiveness is provided by des...
04/21/1981
4181038Device for damping vibrations in rotors of turbomachines
Device for damping vibrations in a rotating turbomachine rotor is formed of an assembly of a plurality of centrally apertured rotor discs force-lockingly clamped together by a tie-rod passing through the apertures of the rotor discs and damping elements d...
01/01/1980
4171147Flywheel for a construction machine
A construction machine is provided with a flywheel having a torque limiter which permits the flywheel to slip when a rotationally driven cutting tool of the machine is halted. The torque limiter is spring loaded to eliminate the need for adjustment which ...
10/16/1979
4145936Vibration absorbers
A vibration absorber includes a hub arranged for rotation during operation about an aixs, a mass encircling the hub and a plurality of resilient arms extending in a spaced-apart spiral pattern between the hub and the mass so that the mass rotates with the...
03/27/1979
4044628Torsional damper
A torsional damper for reducing the vibrations produced when a shaft is driven by the intermittent application of a discontinuous force thereto, e.g. the crankshaft of an internal combustion engine, comprising an integrally formed disk-like mass having th...
08/30/1977
 
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