Abstract: The reciprocating grate according to the invention for the treatment of bulk material, particularly for cooling hot material by means of gases, comprises a plurality of rows of grate plates disposed behind one another in the longitudinal direction of the grate, of which at least some are moveable to and fro relative to the others, wherein the grate plates of rows of adjacent grate plates overlap each other somewhat like scales. In order that the wear between grate plates moving relative to one another and the requirement for confining air between these grate plates can be kept relatively low, in at least one longitudinal portion of the grate in each case at least two rows of grate plates which are immediately adjacent to one another are jointly movable relative to at least one succeeding row of grate plates.

Abstract: An exchangeable member is secured to a carrier in a shuttleless loom by an elastically yielding mounting element having a head, a shank, and a neck between the head and the shank. The exchangeable member has a bore aligned with a bore in the carrier. The mounting element is pulled through the bores so that the neck snaps into place in the bores under tension while the head and shank bear against outer surfaces to hold the member and carrier together. The mounting element has a nail type shape with a long shaft that is threaded through the aligned bores and pulled for tensioning the neck. The exchangeable member is, for example, a member that is subject to wear and tear that must be exchanged frequently such as the guide body of a gripper head which forms the carrier for the guide body.