Abstract: A heat pump apparatus comprising: a heat pump circuit composed of an external combustion engine, a radiator through which a first medium heated by a first heat exchanger of said external combustion engine flows and a cooler through which a second medium cooled by a second heat exchanger of said external combustion engine flows; a motor for supplementing a motive power to said external combustion engine; a brake for braking said external combustion engine; a detector for detecting a heating load; and a controller for calculating a motive power necessary for said external combustion engine based on the difference between a value detected by said detector and a preset value previously set, and for controlling said motor to move when the calculated motive power is larger than a self-output of said external combustion engine.

Abstract: An apparatus for horizontally casting concrete comprises a horizontally foldable multilink support arm composed of an attachment frame, a proximal boom, intermediate booms, and a distal boom which are pivotally coupled by joint tubes, a drive mechanism composed of worm wheels mounted on the joint tubes and worm gears mounted on the booms and held in mesh with the worm wheels for enabling the support arm to move in articulatory motion, a concrete pressure-feed pipe extending from a pump along the booms and through the joint tubes with swivel joints, and an attachment jig mounted on the attachment frame for being mounted on a column.