Patent ID: 8474582

Claim:
A cushion device comprising: a shock absorber including: a first member including a cylinder; a second member including a piston, the first and second members being arranged such that a relative position of the second member with respect to the first member is variable; a first oil chamber with a capacity that changes depending on the relative position of the second member; and a first fluid chamber with a capacity that changes depending on the relative position of the second member; an accumulator arranged to accumulate oil discharged from the shock absorber; an oil path connected to the first oil chamber; and a fluid path connected to the first fluid chamber; wherein the accumulator includes: a second oil chamber connected to the first oil chamber through the oil path; a second fluid chamber connected to the first fluid chamber through the fluid path; and a valve controlled by a pressure of fluid supplied to the second fluid chamber through the fluid path and arranged to apply resistance to a flow of oil discharged from the first oil chamber depending on the relative position of the second member; wherein the second fluid chamber is arranged to receive fluid from the first fluid chamber during a compression of the shock absorber.