US 7,320,251 B2
Load detector and transport equipment including the same
Yoshinori Harada, Shizuoka (Japan); Yutaka Mizuno, Shizuoka (Japan); Tomoyoshi Koyanagi, Shizuoka (Japan); and Yoshiyuki Kaneko, Shizuoka (Japan)
Assigned to Yamaha Hatsudoki Kabushiki Kaisha, Shizuoka (Japan); and Yamaha Marine Kabushiki Kaisha, Shizuoka (Japan)
Filed on Jun. 02, 2005, as Appl. No. 11/143,282.
Claims priority of application No. 2004-169257 (JP), filed on Jun. 07, 2004.
Prior Publication US 2005/0275400 A1, Dec. 15, 2005
Int. Cl. G01B 7/16 (2006.01); G01L 1/00 (2006.01)
U.S. Cl. 73—779 17 Claims
OG exemplary drawing
 
1. A load detector comprising:
a magnetostrictive sensor including a hollow case;
a coil housed in the case; and
a rod-like magnetic member located along an approximate axial center of the coil, magnetized by an electric current flowing through the coil and receiving a load at an end thereof;
a pin having a contact surface arranged to apply the load onto the end of the magnetic member and axially aligned with the magnetic member; and
a displacement reduction member arranged adjacent to the pin to reduce displacement of the pin in directions not coaxial to both the magnetic member and the coil.