Abstract: Installation for biodiesel production includes a support structure (5); a tough body or filling (6); a set of vessels fitted or formed in the filling of the support structure (5) or tough body (6); a reactor circuit which includes the supply of the reagents from at least one pumping device through a first set of heat exchangers (2), a second set of heat exchangers (3) and/or a set of reaction units (4); and a heat-insulating filler (7) fitted between items (2, 3, 4) constituting the reactor and the vessels formed in the structural filling of the structure. A pumping device with a piston is placed inside the recipient from which the product to be pumped is taken.

Abstract: Display stand with mobile panels for wall and floor tiles includes an assembly formed of a coupling between the belt or equivalent device for traction and the panel, able to temporarily house a ball under the pressure of a spring, which is located between two sets of resilient stops. Thus, stopping the motor allows the panel to be moved by a manual effort taking the ball out of the housing in the part connected to the panel.

Abstract: A motor-driven unit that can be remotely controlled for moving a curtain fitted on a rail and having an operation cord, includes an electrical power supply, a reversible motor, pulleys suspended on the operation cord with the operation cord being partially housed in a channel over at least part of a perimeter of the pulleys and in such a way that the weight of the unit maintains cohesion between the operation cord and the pulleys, and being enough to compensate for friction exerted by the curtain or the rail itself, the channel having a convergent cross-section, a mass which keeps the operating cord taught, a signal receiver, a remote control for generating a signal for determining movement of the motor in either direction and supplied to the signal receiver, and the mass and electrical supply together formed by an electrical accumulator.

Abstract: A combined actuation lock includes an anchorage joined firmly and inseparably to ground; a rod insertable into the anchorage and including a mechanism for temporary coupling the rod with the anchorage, the mechanism including two through holes such that a part next to a lower end of the rod has two balls that can protrude through the holes, a vertically moveable core in the rod and including an axle having a cylinder and cap at opposite ends thereof, the cylinder having a conical pusher end, and the anchorage having a central part with an annular space that can retain the lower end of the rod when the balls protrude therefrom; and a body secured to a door, the rod firmly connected to the body, and the body including devices for activating opening and closing processes of the rod, the devices including a manual activation device having at least one external lock with a cam and a cover articulated about an axis, the cover including a recess which houses a protruding part of the lock, and an electrical operation