Abstract: The apparatus includes a casing, a cylinder head, a chamber sleeve tube to form a combustion chamber, a cylinder and a drive piston. An isolating element is mounted on the chamber sleeve tube so as, when the apparatus is opened, to isolate the space formed between the anterior part of the chamber sleeve tube and the casing from the combustion chamber. A bellows is provided for ducting the cooling and venting fresh air directly towards the chamber.

Abstract: The strip comprises fasteners (1), each having a shank (2) which is pointed at one end (4) and bears a head (3) at the other end, these fasteners being respectively engaged by their shanks (2) in guide and damping blocks joined together in a string (8). The strip comprises a second guide string (9). The loader comprises a chamber (13) for accommodating the fastener heads (3), a chamber (14; 13) for accommodating the first string (8) and a chamber (14; 15) for accommodating the second string (9), the chambers being connected in pairs by hollow shafts (16, 17) that accommodate the fastener shanks (2).