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Class Information
Number: 474/101
Name: Endless belt power transmission systems or components > Means for adjusting belt tension or for shifting belt, pulley or guide roll
Description:










Sub-classes under this class:

Class Number Class Name Patents
474/119 Belt shifter for shifting belt laterally or for selective engagement and supported disengagement of belt with pulley 17
474/132 Gravity actuated guide roll for tensioning belt 10
474/131 Guide roll forms belt-thickness gap with pulley 8
474/133 Guide roll mounted for movement of its axis along arcuate path to tension belt 208
474/136 Guide roll mounted for movement of its axis along rectilineal path to tension belt 75
474/109 Load responsive tension adjuster or shifter 232
474/112 Pulley or guide roll has eccentric mount for shifting or tensioning movement 160
474/113 Pulley shifter 66
474/111 Tension adjuster has surface in sliding contact with belt 384
474/110 Tension adjuster or shifter driven by electrical or fluid motor 405
474/102 With sensor for controlling operation of shifter to correct belt training deviation 49


Patents under this class:
1 2 3 4 5 6 7

Patent Number Title Of Patent Date Issued
8690718 Tightener for a belt drive operating in the presence of oil Apr. 8, 2014
8651988 Deflection pulley for a traction means Feb. 18, 2014
8608601 Tensioning device Dec. 17, 2013
8562465 Clip-type tensioner Oct. 22, 2013
8541972 Method for suppressing speed ripple by using torque compensator based on activation function Sep. 24, 2013
8529388 Mechanical tensioner with damping feature Sep. 10, 2013
8523719 Helical tensioner for tension members Sep. 3, 2013
8521369 Method and device for regulation or control of a restraint system in a vehicle Aug. 27, 2013
8506435 Belt drive system assembly and tension apparatus Aug. 13, 2013
8465385 Chain guide mechanism Jun. 18, 2013
8460140 Belt tensioner utilizing asymmetric motion control Jun. 11, 2013
8413326 Assembling method for timing system of engine Apr. 9, 2013
8403781 Tensioning apparatus with a blocking device Mar. 26, 2013
8393986 Captive fastener apparatus for chain guide or tensioner arm Mar. 12, 2013
8387244 Assembly system and method for a tensioned chain drive system Mar. 5, 2013
8371973 Chain tensioner Feb. 12, 2013
8323135 Downward angle settable hydraulic tensioner Dec. 4, 2012
8317643 Hydraulic tensioning system comprising integrated overpressure valve Nov. 27, 2012
8292765 Pulley tensioner for an oil wet belt drive Oct. 23, 2012
8282520 Chain tensioner Oct. 9, 2012
8277347 Tensioner Oct. 2, 2012
8267822 Wrap-around drive Sep. 18, 2012
8262521 Tensioner assembly comprising a displaceable tensioning rail Sep. 11, 2012
8257212 Chain tensioner Sep. 4, 2012
8235849 Combined chain ring protector and chain guide Aug. 7, 2012
8226508 Transmissions, drive systems and methods for using same Jul. 24, 2012
8137222 Accessory drive tensioner system Mar. 20, 2012
8092327 Tensioner lever for chain drive Jan. 10, 2012
8062157 Tensioner with an adjuster Nov. 22, 2011
8033374 Drive arrangement Oct. 11, 2011
8011410 Driving mechanism for labeling machine Sep. 6, 2011
8002657 Low profile tensioner with arcuate spring Aug. 23, 2011
7993226 Clamping drive with mechanical damping for a traction mechanism drive Aug. 9, 2011
7988578 Belt tensioner assembly Aug. 2, 2011
7980976 Timing belt tensioner Jul. 19, 2011
7927242 Downward angle settable hydraulic tensioner Apr. 19, 2011
7901310 Two-arm belt tensioner for a belt drive Mar. 8, 2011
7899378 Image forming apparatus having movable belt Mar. 1, 2011
7891631 Supporting structure and tension adjusting mechanism thereof Feb. 22, 2011
7892125 Simplified and adaptable flexible drive tensioner Feb. 22, 2011
7874949 Power unit with auxiliary machine driving transmission mechanism Jan. 25, 2011
7850559 Hydraulic tensioning system Dec. 14, 2010
7785220 Adjustable pulley assembly and drive unit having an adjustable pulley assembly for an endless flexible drive member of the drive unit Aug. 31, 2010
7766775 Chain tensioner Aug. 3, 2010
7758460 Carriage driving apparatus and image reading apparatus and image recording apparatus using the same Jul. 20, 2010
7736254 Compact cable tension tender device Jun. 15, 2010
7678001 Apparatus for the intermittent drive of a spindle for a workpiece fixture, especially a forging machine Mar. 16, 2010
7662057 Eccentric tensioning device Feb. 16, 2010
7584040 Method of CVT control in a vehicle for adapting its noise characteristics with permanent and transient modes Sep. 1, 2009
7559863 Chain tensioner Jul. 14, 2009

1 2 3 4 5 6 7










 
 
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