Abstract: A two-wheel caster includes a rotation shaft component, an arm member provided with a hollow, an axle attached to the arm member, a left wheel and a right wheel attached to the axle. The arm member includes an axle supporting member which is stored in the hollow so as to be movable up and down, and which supports the axle, a compression coil spring which is stored in the hollow, and which pushes the axle supporting member, and a main rib surrounding the hollow. The axle supporting member includes an axle receiving portion which is formed in a tadpole-like shape, corresponds to a head of such a shape, and is provided with a shaft hole through which the axle is inserted, and a cantilever spring portion which corresponds to a tail of the tadpole-like shape, and which is continuous to the main rib.

Abstract: Disclosed is an apparatus of manufacturing a pipe-shaped insulator, wherein a thin fiberglass mat is coated, at a surface thereof, with a binder (adhesive) and is press-wound on a forming roller, so as to manufacture a pipe-shaped insulator having a predetermined thickness and a predetermined diameter. The apparatus includes a mat feeding roller, a plurality of fiberglass mat transportation rollers, a coating roller to coat a binder over a surface of the fiberglass mat, a forming roller on which the fiberglass mat, coated with the binder, is wound in plural times to form a pipe-shaped insulator, a squeeze roller disposed parallel to the forming roller, a pressure regulator to press the fiberglass mat, an encoder to measure a transported length of the fiberglass mat, a cutting unit to diagonally cut the fiberglass mat, a control system, a sensor, and a plurality of drive motors and power transmission members.

Abstract: A baggage lock device to halt rotation of caster wheels as the handle is retracted, and allow the wheels to move as the handle is pulled out. The device has a receptacle with a handle extendable to be pulled put. A wheel halting mechanism has a traction cord inhibiting wheel rotation by a force pressed against the wheel as operation of an operation mechanism is transmitted via a pulling force transmission mechanism having a pulled wire, a brake pad, a linking member, and means for restoring the position of the operated elements.”.