Patent ID: 7793766
Filing Date: 2010-09-14
Classification: B62K,F16F

Abstract:
1. A front fork interposed between a vehicle body and a wheel to suppress variation in an attitude of the vehicle body, comprising: a fork main body in which an inner tube is inserted into an outer tube to enable free expansion and contraction; a damper disposed in an axial core portion in an interior of the fork main body, which generates a damping force when a rod moves within a cylinder in which a working oil is sealed as the fork main body expands and contracts; an air chamber delimited by a free piston inserted slidably in the cylinder, which compensates for variation in an internal volume of the cylinder caused by invasion and retreat of the rod into and from the cylinder; a pressurizing spring housed in the air chamber, which biases the free piston in a direction for enlarging the air chamber; and a sub-spring which biases the free piston in a direction for shrinking the air chamber in opposition to the pressurizing spring.