Abstract: A heat-insulating outer wall for a building includes an inner air gap (7) with a partitioning wall (12) which separates the inner air gap into a first part (7a) and a second part (7b), which at the top is equipped with an outlet opening (11). The second part (7b) is equipped at the bottom with a heater (13). Airflow-regulator (15) is positioned in suitable places in the wall in order to limit the airflow in the case of large air pressure differences.

Abstract: In a slipform arrangement comprising a plurality of oblong, substantially rectangular mold plates arranged sequentially in a manner such that their end portions overlap each other there is provided an elongate post-like mold plate support means adjacent a short edge of an associated mold plate such as to support said plate in spaced relationship therewith, thereby to leave a gap for accommodating an end portion of a sequential mold plate, and tensioning means for creating in the region of said short edge a tensioning force directed substantially in the long direction of the post-like mold support. That part of the mold plate located nearest said short edge can be slightly angled towards the mold plate support means.

Abstract: The drill tool of the present invention comprises a profiled tubular drill shank with a drill head, which consists of the free part of the drill shank with guide strips and cutting element fastened to it, characterized in that the cutting element (3) is fixed in a position pressed or forged into the drill shank (1).

Abstract: A check valve comprising a housing having an annular abutment therein, a spring pressed guide in the abutment, an elastomeric disc on the guide, a conical head with an annular tapering groove facing the disc and a flat apex facing downstream, said guide having fluid passages open upon downstream pressure and the conical head and disc closing and stabilizing the valve upon lack of pressure or reverse pressure.

Abstract: Planing tool comprising a front part movably connected to a rear part and having surfaces which face each other and are movable towards and away from each other, said surfaces being inclined in the direction of forward push of the tool and having means for fixing a bit therebetween, said surfaces and consequently said parts of the tool relative to each other, and means for mutually pressing together said surfaces and locking said parts of the tool together with the bit clamped and fixed with respect to its position between said surfaces.

Abstract: A combination tool comprising a ball-shaped handle member and at least three substantially straight work-engaging members projecting substantially radially from said ball-shaped handle member, the tips of said work-engaging members defining a plane spaced from the surface of said handle member. At least three orientation rings are provided, each extending along the intersection of the surface of the handle member with a plane extending through the handle member center at right angles to one of the work-engaging members.