Abstract: A medical device wherein a surface lubricating layer and one of various polymer bases are fixed with each other firmly by a relatively simple technique. The medical device permanently exhibits excellent surface lubricity when in use. The medical device has a lubricating surface when wet, and includes a base layer at least the surface of which is composed of a polymer material, a compound (thiol compound) which is supported on at least a part of the base layer and has a plurality of thiol groups in each molecule, and a surface lubricating layer which covers the thiol compound and is composed of a hydrophilic polymer that has a reactive functional group.

Abstract: A medical device wherein a surface lubricating layer and one of various polymer bases are fixed with each other firmly by a relatively simple technique. The medical device permanently exhibits excellent surface lubricity when in use. The medical device has a lubricating surface when wet, and includes a base layer at least the surface of which is composed of a polymer material, a compound (thiol compound) which is supported on at least a part of the base layer and has a plurality of thiol groups in each molecule, and a surface lubricating layer which covers the thiol compound and is composed of a hydrophilic polymer that has a reactive functional group.

Abstract: A power steering apparatus includes an electric motor which drives a power steering pump. a vehicle speed detector senses the speed of the vehicle. A steering wheel rotation detector senses whether or not the steering wheel is being rotated. At low vehicle speeds, a control assembly effects operation of the electric motor to drive the power steering pump at a relatively low standby angular velocity prior to initiation of a steering operation. Upon initiation and during of the steering operation at low vehicle speeds, the control assembly effects operation of the electric motor to drive the power steering pump at an angular velocity which varies as a function of vehicle speed. When the vehicle is traveling at a relatively high speed, the control assembly causes the electric motor to drive the pump at an angular velocity which is less than the standby angular velocity, that is, at a very low speed or at a standstill.