Abstract: A machine for washing the internal surfaces of hollow bowl-shaped bodies has a housing whose cover is movable between open and closed positions and has devices for releasably holding and centering a body thereon. The housing supports a driven shaft which carries and rotates two parallel motion mechanisms for brushes extending in parallelism with the axis of the shaft and moving outwardly into engagement with the adjacent portions of the internal surface of a body in the housing when the shaft is driven by a motor. The parallel motion mechanisms are deformed by centrifugal force to move the brushes outwardly in automatic response to rotation of the shaft. The shaft is assembled of sections which are slidably telescoped into each other, and the outermost section carries a further brush which engages the innermost portion of the internal surface of a body which is held by the cover while the latter dwells in the closed position.

Abstract: A machine for washing kettles or similar hollow bowl-shaped objects has a housing with an inclined front wall having an opening and a recess surrounding the opening at the outer side of the housing. The opening can be closed by a cover which is pivoted to the housing and has a circumferentially complete marginal portion engaging the wall in the recess around the opening when the cover is moved to closed position. The housing contains rotary brushes which treat the internal and external surfaces of a properly inserted object, and such treatment takes place in the presence of a liquid which is admitted into the housing by one or more pipes whereby some liquid leaks through the opening along the marginal portion of the cover and accumulates in the recess. The wall has a port which returns collected liquid into the housing. A trough is mounted below the recess at the outer side of the wall to intercept liquid which overflows from or bypasses the recess.