Abstract: A running sole for a shoe comprising a sole body 1, having a generally longitudinally extending first recess 5 extending from the one edge of the sole and at least one laterally extending second recess 6, 7, extending from the side edges of the sole in the heel region, said at least one second recess intersecting the first recess, a first supporting body 10 of springably compressible and/or flexible supporting material exchangeably inserted in said first recess and having at least one opening 11 inside thereof aligned with the second recess 6, 7, and at least one second similar supporting body 16, 17 inserted in said second recess(s) 6, 7 and engaging in said opening or openings to lock said supporting bodies in position.

Abstract: A concrete gun comprising in combination a rotor, a plurality of chambers arranged in said rotor in a circular array and extending parallel to the axis of said rotor, sealing plates of elastomeric material engaging the ends of the rotor and closing said chambers, a vent orifice comprising a recess in one of said sealing plates, said recess being located to be successively in register with said chambers upon rotation of said rotor, an air filter communicating said recess with the surrounding air and a clearing device for the recess including an actuating element extending from the recess to outside the gun. By reason of the external actuating element the vent orifice can be periodically cleaned of deposited residue without danger or having to shut down the machine.