US RE50,367 E1
Magnetic encoder and roller bearing unit having magnetic encoder
Toshikazu Yabe, Fujisawa (JP); Takeshi Murakami, Fujisawa (JP); and Nariaki Aihara, Fujisawa (JP)
Assigned to NSK LTD., Tokyo (JP)
Appl. No. 17/491,182
Filed by NSK LTD., Tokyo (JP)
PCT Filed May 9, 2006, PCT No. PCT/JP2006/309338
§ 371(c)(1), (2), (4) Date Nov. 12, 2007,
PCT Pub. No. WO02/097536, PCT Pub. Date Dec. 5, 2002.
Application 17/491,182 is a reissue of application No. 11/914,166, filed on May 9, 2006, granted, now 7,671,582, issued on Mar. 2, 2010.
Claims priority of application No. 2005-137307 (JP), filed on May 10, 2005; application No. 2005-151395 (JP), filed on May 24, 2005; application No. 2005-152554 (JP), filed on May 25, 2005; and application No. 2005-180669 (JP), filed on Jun. 21, 2005.
Int. Cl. G01P 3/42 (2006.01); F16C 33/78 (2006.01); F16C 41/00 (2006.01); F16J 15/326 (2016.01); G01P 3/44 (2006.01); G01P 3/487 (2006.01); H01F 1/117 (2006.01); F16C 19/18 (2006.01); H01F 7/02 (2006.01)
CPC F16J 15/326 (2013.01) [F16C 33/7883 (2013.01); F16C 41/007 (2013.01); G01P 3/443 (2013.01); G01P 3/487 (2013.01); H01F 1/117 (2013.01); F16C 19/186 (2013.01); F16C 2326/02 (2013.01); H01F 7/0215 (2013.01)] 5 Claims
OG exemplary drawing
 
1. A magnetic encoder comprising:
a magnet portion formed by circularly arranging a magnetic material comprising a magnetic powder and a binder for the magnetic powder, wherein
the binder comprises at least a thermoplastic resin and an impact resistance-improving agent, and
a bending deflection amount of the magnetic portion falls within a range of 2 to 15 mm in an experimental condition that a thickness of magnetic material is 3.0 mm, span distance is 50 mm and temperature is 23° C. under ASTM D790 [ , wherein
the thermoplastic resin is a polyamide 12 resin, and
the impact resistance-improving agent is a modified polyamide 12 resin which is a block copolymer comprising:
a hard segment of the polyamide 12; and
a soft segment of at least one of a polyester component and a polyether component] .