Abstract: A nutless bolt includes a body having a shaft and a stop coupled to the shaft. Shaft is dimensioned to allow passage through a hole formed in a structure into which the bolt is inserted. The stop prevents body from falling into or through the hole. An axial bore formed in body houses a locking mechanism extending radially from shaft to lock body and nutless bolt in the hole. An actuator pin movable along the bore in a generally down hole direction through various positions. Position L1 is a pre-application position; position L2 is a locking position; and position L3 is a release position. Pin is movable in the down hole direction from L2 where the pin causes the locking mechanism to extend radially from shaft to lock the body in the hole, to L3 where the pin is retained in the body and displaced relative to the locking mechanism.

Abstract: A nutless bolt includes a body having a shaft and a stop coupled to the shaft. Shaft is dimensioned to allow passage through a hole formed in a structure into which the bolt is inserted. The stop prevents body from falling into or through the hole. An axial bore formed in body houses a locking mechanism extending radially from shaft to lock body and nutless bolt in the hole. An actuator pin movable along the bore in a generally down hole direction through various positions. Position L1 is a pre-application position; position L2 is a locking position; and position L3 is a release position. Pin is movable in the down hole direction from L2 where the pin causes the locking mechanism to extend radially from shaft to lock the body in the hole, to L3 where the pin is retained in the body and displaced relative to the locking mechanism.

Abstract: A building structure having a plurality of wall elements connecting together to form a wall is disclosed. The wall elements have a plurality of sides, each side is connected to an adjacent side of a wall element by an interlocking connection means. Methods of building a structure with the wall elements are also disclosed.

Abstract: A dust retention system for locating above a product vessel includes a support member mounted above the product vessel, a door including an engaging portion detachably connected to the support member and an adjustment device for adjusting the angle of the door with respect to the support member. The door includes a striking portion adjacent the engaging portion with at least a section of the striking portion being constructed of a resiliently flexible material. Product falling onto the striking portion causes the resiliently flexible material of the striking portion to be deflected by the weight of the product, thereby forcing the door from a closed position, where dust is prohibited from escaping the product vessel, into an open position where the product passes across the door into the product vessel. Thereafter the door, without the weight of said product, returning to the closed position under a bias force exerted by said resiliently flexible material.