Abstract: A backpack-type working machine comprises an engine on a shouldering frame and a swingable arm on a side thereof. A throttle lever on the arm controls the engine. A base of the arm is connected to a holder by means of an elastic pivot means including a bolt around which the arm swings and a spring. To allow the arm to move on a plane orthogonal to a swing direction (plane including a center line of a pivot means), the holder and the base of the arm are connected such that only parts opposing and oppositely of inclined surfaces thereof are in partial contact with each other.

Abstract: Fuel tank breathing device for a small boat including a body and a handle column mounted on the body, a breathing conduit extending between a fuel tank in the body and a chamber defined in the column, the chamber in the column being provided with a ventilating and drain hole at its lower portion.