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Class Information
Number: 74/640
Name: Machine element or mechanism > Gearing
Description: Mechanism comprising relatively rotatable bodies or combinations of such bodies provided with teeth or interengaging elements, chains and sprockets, belts, and pulleys or other means not otherwise classified, whereby a rotatable body will impart to or receive motion or power from some other member by rolling contact.










Sub-classes under this class:

Class Number Class Name Patents
74/395 Adjustable 85
74/318 Alternating rotary or continuous 3
74/319 Alternating rotary 7
74/409 Backlash take-up 444
74/391 Central driving shaft in axle 36
74/412R Directly cooperating gears 37
74/405 Disconnecting means 124
74/406 Displaceable elements 35
74/390 Eccentric driving shaft and axle 18
74/388R Follow-up mechanism 36
74/431 Gear and rotary bodies 44
74/745 In series plural interchangeably locked nonplanetary units 202
74/325 Interchangeably locked 176
74/467 Lubrication 360
74/650 Nonplanetary gearing differential type (e.g., gearless differentials) 218
74/392 Parallel shafts, adjustable gear mesh 23
74/380 Pivotally supported 20
74/664 Plural power paths from prime mover 59
74/665R Plural power paths to and/or from gearing 52
74/661 Plural prime movers selectively coupled to common output 201
74/410 Pressure distributing 186
74/810.1 Reversal of direction of power flow changes power transmission to alternate path 114
74/404 Reversing means 40
74/434 Rotary bodies 88
74/655 Single gearing unit includes fluid drive 19
74/457 Teeth 91
74/216.3 Toothed gear and recirculated unconnected elements 22
74/393 Varying speed ratio 84
74/411.5 With brake means for gearing 249
74/730.1 With fluid drive 117
74/411 Yieldability in gear trains 288


Patents under this class:
1 2 3 4 5 6

Patent Number Title Of Patent Date Issued
8689657 Axially compact support for a gear within a gearbox Apr. 8, 2014
8677963 Electrical camshaft phaser with energy recovery Mar. 25, 2014
8661940 Wave gear device having three-dimensional continuous contact tooth profile Mar. 4, 2014
8661939 Wave gear device having compound tooth profile of positive deflection meshing Mar. 4, 2014
8663048 Translating gear set with linkages Mar. 4, 2014
8656810 Wave-type linear motion mechanism Feb. 25, 2014
8656809 Gearing Feb. 25, 2014
8656800 Harmonic drive using profile shifted gear Feb. 25, 2014
8646360 Flexspline and wave gear device Feb. 11, 2014
8631988 Surgical stapler having an articulation mechanism Jan. 21, 2014
8628449 Low mass planetary carrier and clutch housing Jan. 14, 2014
8616086 Harmonic speed reducer for robots Dec. 31, 2013
8596158 Speed reducing mechanism Dec. 3, 2013
8597155 Planetary gearing Dec. 3, 2013
8567285 Mobile robotic vacuum cleaner with a detachable electrical fan Oct. 29, 2013
8562478 Differential for motor vehicles Oct. 22, 2013
8534408 Electrically-operated two-wheeled vehicle Sep. 17, 2013
8523731 Welded component, in particular planet wheel carrier, method for producing the component and apparatus for carrying out the method Sep. 3, 2013
8516924 Reducing mechanism and harmonic drive thereof Aug. 27, 2013
8485064 Composite wave gear drive Jul. 16, 2013
8480528 Coaxial transmission Jul. 9, 2013
8452500 Multi-range hydro-mechanical transmission May. 28, 2013
8384260 Geared motor assembly Feb. 26, 2013
8359144 Driveline lash management in powertrain systems Jan. 22, 2013
8307738 Coaxial transmission, especially hollow shaft transmission for industrial drive engineering Nov. 13, 2012
8302507 Wave gear device Nov. 6, 2012
8302589 Transmission method and transmission mechanism for toy gun Nov. 6, 2012
8281688 Wave gear device Oct. 9, 2012
8256327 Coaxial gear set Sep. 4, 2012
8230760 Concrete vibrator inline transmission Jul. 31, 2012
8229324 Coupling device, and image forming apparatus Jul. 24, 2012
8215205 Wave gear device Jul. 10, 2012
8210070 Modified crown reduction gear Jul. 3, 2012
8191439 Wave-gear-type linear-actuation mechanism Jun. 5, 2012
8117945 Hollow speed reducer Feb. 21, 2012
8104375 Differential gear unit for motor vehicles comprising an active control mechanism for the driving force distribution Jan. 31, 2012
8104443 Helical cam device and method Jan. 31, 2012
8051566 Method for manufacturing rigid internal gear of wave gear device Nov. 8, 2011
8028603 Method for setting gear tooth profile in flat wave gear device on side where gears have same number of teeth Oct. 4, 2011
8020470 Harmonic gear drive Sep. 20, 2011
8011273 Wave generator, wave gear device, and method of preventing reduction in efficiency of wave gear device Sep. 6, 2011
7974754 Vehicle steering control system Jul. 5, 2011
7966907 Finger joint mechanism Jun. 28, 2011
7963190 Helical gear sets Jun. 21, 2011
7946195 Steering apparatus for vehicle May. 24, 2011
7944158 Controlled electric motor arrangement for a tension mechanism May. 17, 2011
7905326 Method for lubricating wave reduction gear, and rotating table device Mar. 15, 2011
7891272 Robotic harmonic flex-drive Feb. 22, 2011
7882766 Automatic torque-switching apparatus Feb. 8, 2011
7854995 High density dual helical gear Dec. 21, 2010

1 2 3 4 5 6










 
 
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