Resources Contact Us Home
Derailleur for a bicycle

Image Number 2 for United States Patent #4406643.

A derailleur for a bicycle, which is so constructed that a movable member is supported to a base member through two linkage members, a changeover frame having two pulleys carrying thereon a driving chain is pivoted to the movable member, and a tension spring is interposed between the movable member and the changeover frame, so that the tension spring exerts tension on the driving chain, said changeover frame being subjected to resistance against its swinging motion in a direction opposite to the working direction of the tension spring, thereby swinging the changeover frame easily in the direction of working of the changeover frame, while, requiring more force in the reverse direction to the working thereof, thereby making swinging of the changeover frame in the working direction of the tension spring easy and more difficult in the swinging motion direction opposite to the working direction of the spring.

  Recently Added Patents
Center spreader adapter tool for toilet paper rolls and paper towel rolls that do not have inner cardboard tubes
Liposomes with improved drug retention for treatment of cancer
N-phenyl-(homo)piperazinyl-benzenesulfonyl or benzenesulfonamide compounds suitable for treating disorders that respond to the modulation of the serotonin 5-HT.sub.6 receptor
Newly identified human rhinovirus of HRV-C and methods and kits for detecting HRV-Cs
Security arrangements for extended USB protocol stack of a USB host system
System and method for browsing tabbed-heterogeneous windows
Imaging apparatus having selection unit to select focus detection areas
  Randomly Featured Patents
Composite elastic yarn and manufacturing method thereof, stretchable textile fabric, and stretchable knitted fabric
Selective radio paging system and pager
System and method for performing verification based upon both rules and models
Suspendable, thermally insulated jacket for I.V. fluid bags
Motor vehicle cruise control with selectively updated integral gain
Device for a reverse vending machine for bottles and cans
Speed control apparatus for a DC motor
Jewelry chain
Imaging apparatus having object plate and variably positionable image sensor